CN113985158B - Residual current protection inspection method, inspection device, electronic apparatus, and storage medium - Google Patents

Abstract

Provided are a residual current protection inspection method, inspection device, electronic equipment and storage medium. The method includes obtaining a reference result corresponding to each reference current, wherein the reference result is obtained based on the first device loading the reference current, and the reference current is determined based on the mutation residual current action interval; for each reference current, Obtain verification results corresponding to multiple first test currents, wherein the verification results are obtained when the second device loads multiple first test currents respectively, and there is a relationship between each first test current and the corresponding reference current. The first phase angle difference; when it is determined that the first residual current protector takes protective action under the condition of the reference current, and when the second residual current protector takes protective actions under multiple first test currents, the reference current is determined is the mutation residual current action value; determine the target mutation residual current action value based on multiple mutation residual current action values.

Description

Residual current protection inspection methods, inspection devices, electronic equipment and storage media

Technical field

Embodiments of the present disclosure relate to the technical field of fault leakage, and more specifically, to a residual current protection inspection method, inspection device, electronic equipment, computer-readable storage media and computer program products.

Background technique

When the power supply system and electrical equipment are operating normally, there is a certain amount of normal leakage current, which is normal and will not affect the safe operation of the power supply system and electrical equipment. When the power supply system or electrical equipment fails, the leakage current increases, affecting the safe use of electricity and even leading to electrical fires, or personal electric shocks, so leakage protection is required. Among them, the residual current includes normal leakage current and fault leakage current.

Contents of the invention

In view of this, embodiments of the present disclosure provide a residual current protection testing method, a testing device, an electronic device, a computer-readable storage medium, and a computer program product.

One aspect of the embodiments of the present disclosure provides a residual current protection inspection method, including:

Obtain a reference result corresponding to each reference current, wherein the above-mentioned reference result is obtained according to the situation where the first device is loaded with the above-mentioned reference current, and the above-mentioned reference result represents that the first residual current protector for the first device is in each Whether a protective action will occur under the above reference current, which is determined based on the mutation residual current action interval;

For each of the above-mentioned reference currents, a verification result corresponding to a plurality of first test currents is obtained, wherein the above-mentioned verification results are obtained when the second device loads a plurality of the above-mentioned first test currents respectively, and each of the above-mentioned first test currents is There is a first phase angle difference between the test current and the corresponding reference current, and the verification result indicates whether the second residual current protector for the second device produces a protective action under the condition of the first test current;

After it is determined that the first residual current protector takes a protective action when the reference current is used, and the second residual current protector takes a protective action when a plurality of the first test currents are all used, the reference current is determined as sudden change in residual current action value; and

The target sudden change residual current action value is determined based on a plurality of the above sudden change residual current action values.

According to an embodiment of the present disclosure, the above-mentioned residual current protection inspection method further includes:

When it is determined that the second residual current protector generates a new reference current based on the reference current when one or more of the first test currents do not perform protective actions among the plurality of first test currents, wherein the above-mentioned The difference between the new reference current and the above-mentioned reference current includes a first multiple of the first test current.

According to an embodiment of the present disclosure, determining the target sudden change residual current action value based on a plurality of the above sudden change residual current action values includes:

Based on a plurality of the sudden change residual current action values, the smallest sudden change residual current action value is determined as the target sudden change residual current action value.

According to an embodiment of the present disclosure, the above-mentioned reference current includes a first preset current and one of the interval end values of the above-mentioned mutation residual current action interval; the above-mentioned mutation residual current action interval is used to characterize the above-mentioned situation when the electronic equipment fails. The current range within which the residual current protector of electronic equipment operates; the first preset current includes the second multiple of the normal leakage current.

According to an embodiment of the present disclosure, the above-mentioned residual current protection inspection method further includes:

Test the above-mentioned first device using the above-mentioned normal leakage current;

Test the above-mentioned second device using a second preset current, wherein there is a second phase angle difference between the above-mentioned second preset current and the above-mentioned normal leakage current;

When neither the above-mentioned first residual current protector nor the above-mentioned second residual current protector occurs a protective action, a first preset applied current is sequentially applied to the above-mentioned second device until the above-mentioned second residual current protector occurs. protective action;

The lower limit value of the sudden change residual current action interval is determined based on the second preset current and the plurality of first preset applied currents.

According to an embodiment of the present disclosure, the above-mentioned residual current protection inspection method further includes:

When both the above-mentioned first residual current protector and the above-mentioned second residual current protector take protective action, a second preset applied current is applied successively on the above-mentioned second device until the above-mentioned second residual current protector does not occur. protective action;

Determine the upper limit of the sudden change residual current action interval based on the second preset current and the plurality of second preset applied currents;

The above-mentioned sudden change residual current action interval is determined based on the above-mentioned lower limit value and the above-mentioned upper limit value.

According to an embodiment of the present disclosure, the above-mentioned residual current protection inspection method further includes:

Test based on the intermediate value of the above-mentioned sudden change residual current action interval to obtain a new sudden change residual current action interval.

According to an embodiment of the present disclosure, each time one of the first preset applied currents is applied, the above-mentioned second device is tested multiple times until the above-mentioned second residual current protector does not take any protective action during multiple tests;

Each time the second preset applied current is applied, the second device is tested multiple times until the second residual current protector takes protective action during multiple tests.

According to an embodiment of the present disclosure, the above-mentioned second phase angle difference includes 180°

According to an embodiment of the present disclosure, the above-mentioned residual current protection inspection method further includes:

Determine a plurality of second test currents according to the above-mentioned mutation residual current action interval;

Based on each of the above-mentioned second test currents, perform multiple tests on the above-mentioned second device to obtain test results regarding the protection action time of the above-mentioned second residual current protector;

When the above test results show that the above protection action time of each test meets the standard range of fault current action time corresponding to the above second test current, the above sudden change residual current action interval is determined as the target sudden change residual current action interval.

Another aspect of the embodiment of the present disclosure provides a residual current protection testing device, including:

The first acquisition module is used to acquire the reference result corresponding to each reference current, wherein the above reference result is obtained according to the situation where the first device is loaded with the above reference current, and the above reference result represents the first parameter for the first device. Whether the residual current protector generates protective action under each of the above-mentioned reference currents. The above-mentioned reference current is determined based on the mutation residual current action interval;

The second acquisition module is configured to acquire verification results corresponding to multiple first test currents for each of the above-mentioned reference currents, wherein the above-mentioned verification results are obtained based on the second device loading multiple above-mentioned first test currents respectively. , there is a first phase angle difference between each of the above-mentioned first test currents and the corresponding above-mentioned reference current, and the above-mentioned verification results represent whether the second residual current protector for the second device operates under the condition of the above-mentioned first test current. produce protective actions;

A first determination module configured to determine that the first residual current protector takes a protective action when the reference current is used, and that the second residual current protector takes a protective action when a plurality of the first test currents are all taken. , determine the above reference current as the sudden change residual current action value; and

The second determination module is used to determine the target sudden change residual current action value based on a plurality of the above sudden change residual current action values.

Another aspect of an embodiment of the present disclosure provides an electronic device, including: one or more processors; a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more When executed by multiple processors, the one or more processors implement the method as described above.

Another aspect of an embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions that, when executed, are used to implement the method as described above.

Another aspect of an embodiment of the present disclosure provides a computer program product, the computer program product comprising computer-executable instructions, which when executed are used to implement the method as described above.

According to an embodiment of the present disclosure, by obtaining a reference result obtained by loading a plurality of reference currents on the first device and a verification result obtained by loading a plurality of first test currents corresponding to each reference current by the second device, the first remaining The current protector takes a protective action under the condition of the reference current, and the second residual current protector determines the reference current as the mutation residual current action value when multiple first test currents all take protective actions, and selects the reference current from the multiple first test currents. The technical means of determining the target sudden change residual current action value in the sudden change residual current action value fully considers the impact of the first phase angle difference between the first test current and the corresponding reference current on the residual current protection, and therefore at least partially overcomes the problem. This solves the technical problem of poor reliability in testing leakage protection methods based on residual current, thereby achieving the technical effect of improving the reliability of testing leakage protection methods based on residual current.

Description of drawings

The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:

Figure 1 schematically shows a flow chart of a residual current protection inspection method according to an embodiment of the present disclosure;

Figure 2 schematically shows a flow chart of a residual current protection verification method according to another embodiment of the present disclosure;

3 schematically illustrates a block diagram of a residual current protection checking device according to an embodiment of the present disclosure; and

FIG. 4 schematically shows a block diagram of an electronic device implementing a residual current protection verification method according to an embodiment of the present disclosure.

Detailed ways

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for convenience of explanation, numerous specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. Furthermore, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily confusing the concepts of the present disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. The terms "comprising," "comprising," and the like, as used herein, indicate the presence of stated features, steps, operations, and/or components but do not exclude the presence or addition of one or more other features, steps, operations, or components.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used here should be interpreted to have meanings consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

Where an expression similar to "at least one of A, B, C, etc." is used, it should generally be interpreted in accordance with the meaning that a person skilled in the art generally understands the expression to mean (e.g., "having A, B and C "A system with at least one of" shall include, but is not limited to, systems with A alone, B alone, C alone, A and B, A and C, B and C, and/or systems with A, B, C, etc. ).

In a single-phase power supply system, the normal leakage current of the power supply line or electrical equipment will not affect its normal operation, nor will it cause personal safety problems. During the operation of power supply lines and electrical equipment, leakage current changes will occur due to insulation damage or personal electric shock.

Fault leakage caused by insulation damage or personal electric shock has obviously different characteristics from normal leakage of power supply lines or electrical equipment, which are mainly reflected in the following aspects:

(1) Under normal circumstances, there is distributed resistance and distributed capacitance between power supply lines or electrical equipment and the ground, and the capacitive component of the leakage current is large, so the normal leakage current has capacitive characteristics;

(2) Under normal circumstances, due to the large dispersion of ground capacitance in different scenarios, the normal leakage of power supply lines or electrical equipment varies greatly, and there is uncertainty;

(3) When an insulation fault occurs in the power supply line or electrical equipment, the insulation resistance to the ground will generally decrease and the resistive leakage current will increase;

(4) In the case of human electric shock, the human body's impedance shows resistive characteristics, so the fault leakage current is resistive leakage current;

(5) Under normal circumstances, the normal leakage current caused by factors such as the environment changes relatively slowly, while the fault leakage current caused by insulation faults in power supply lines or electrical equipment or human body electric shock changes quickly.

Based on the above analysis, the main characteristics of normal leakage and fault leakage can be summarized into two points. Characteristic 1: Normal leakage current is mainly capacitive, while fault leakage current is mainly resistive; Characteristic 2: Normal leakage current changes are generally comparable. Slowly, while the fault leakage current generally changes quickly.

Leakage current is a type of residual current. Specifically, residual current refers to the current vector sum of each phase (including neutral line) in the distribution line that is not zero. In other words, when an accident occurs on the power side, the current flows from the charged body through the human body to the earth, causing the currents of each phase in the main circuit incoming and outgoing lines to be unequal. At this time, the instantaneous vector composite effective value of the current is called the residual current. , that is, leakage. Among them, leakage includes normal leakage and fault leakage. Methods in the related art for testing leakage protection methods based on residual current are less effective.

In view of this, the inventor found that the impact of the first phase angle difference between the first test current loaded by the second device and the corresponding reference current loaded by the first device on the residual current protection can be considered, so that the protection based on the residual current can be improved. The effectiveness of the leakage protection method is tested to ensure the consistency and reliability of the leakage protection based on the residual current change.

Embodiments of the present disclosure provide a residual current protection testing method, testing device, electronic equipment, computer-readable storage media, and computer program products. The method includes obtaining a reference result corresponding to each reference current, wherein the reference result is obtained based on the first device loading the reference current, and the reference current is determined based on the mutation residual current action interval; for each reference current, Obtain verification results corresponding to multiple first test currents, wherein the verification results are obtained when the second device loads multiple first test currents respectively, and there is a relationship between each first test current and the corresponding reference current. The first phase angle difference; when it is determined that the first residual current protector takes protective action under the condition of the reference current, and when the second residual current protector takes protective actions under multiple first test currents, the reference current is determined is the mutation residual current action value; determine the target mutation residual current action value based on multiple mutation residual current action values.

FIG. 1 schematically shows a flow chart of a residual current protection verification method according to an embodiment of the present disclosure.

As shown in Figure 1, the method may include operations S101 to S103.

In operation S101, a reference result corresponding to each reference current is obtained, wherein the reference result is obtained according to the situation where the first device is loaded with the reference current, and the reference result represents that the first residual current protector for the first device is in each Whether a protective action will occur under a reference current, the reference current is determined based on the mutation residual current action interval.

In operation S102, for each reference current, a verification result corresponding to a plurality of first test currents is obtained, wherein the verification result is obtained when a plurality of first test currents are respectively loaded according to the second device, and each third There is a first phase angle difference between a test current and the corresponding reference current, and the verification result represents whether the second residual current protector for the second device produces a protective action under the condition of the first test current.

In operation S103, after it is determined that the first residual current protector takes a protective action under the reference current, and the second residual current protector takes a protective action under a plurality of first test currents, the reference current is determined to be a sudden change. Residual current action value.

In operation S104, a target sudden change residual current action value is determined based on a plurality of sudden change residual current action values.

According to an embodiment of the present disclosure, two electrical circuits are respectively provided, wherein the first circuit is provided with a first device and a first residual current protector, and the second circuit is provided with a second device and a second residual current protector.

According to an embodiment of the present disclosure, loop one is loaded with each of the above-mentioned reference currents respectively. During the process of loading the reference current on loop one, the reference result of whether the first residual current protector generates a protective action can be obtained. At the same time, loop two is loaded with multiple first test currents corresponding to the reference current. In the process of loop two being loaded with multiple first test currents corresponding to the reference current, verification of whether the second residual current protector generates protective action can be obtained. result.

According to an embodiment of the present disclosure, for each reference current, it is determined that the first residual current protector has taken a protective action under the condition of the reference current, and the second residual current protector has taken protection under multiple first test currents. In the case of action, the reference current is determined as the sudden change residual current action value.

According to embodiments of the present disclosure, since loop one is loaded with multiple reference currents respectively, multiple mutation residual current action values can ultimately be obtained. The final target sudden change residual current action value is determined based on the multiple sudden change residual current action values.

According to an embodiment of the present disclosure, by obtaining a reference result obtained by loading a plurality of reference currents on the first device and a verification result obtained by loading a plurality of first test currents corresponding to each reference current by the second device, the first remaining The current protector takes a protective action under the condition of the reference current, and the second residual current protector determines the reference current as the mutation residual current action value when multiple first test currents all take protective actions, and selects the reference current from the multiple first test currents. The technical means of determining the target sudden change residual current action value in the sudden change residual current action value fully considers the impact of the first phase angle difference between the first test current and the corresponding reference current on the residual current protection, and therefore at least partially overcomes the problem. This solves the technical problem of poor reliability in testing leakage protection methods based on residual current, thereby achieving the technical effect of improving the reliability of testing leakage protection methods based on residual current.

According to embodiments of the present disclosure, the above residual current protection inspection method may further include the following operations.

When it is determined that the second residual current protector has one or more first test currents that do not perform protective actions among the plurality of first test currents, a new reference current is generated according to the reference current, wherein the new reference current is equal to The difference between the reference currents includes a first multiple of the first test current.

According to embodiments of the present disclosure, the first multiple can be specifically set according to requirements, for example, it can be 0.01 times.

According to the embodiment of the present disclosure, during the process of loading multiple first test currents in circuit two, if the second residual current protector does not take protective action when loading one or more first test currents, the new residual current protector is re-determined. The reference current, for example, can be a first test current increased by a first multiple based on the reference current.

According to an embodiment of the present disclosure, the first multiple of the first test current is increased multiple times, so that the protection action occurs when loop two is loaded with multiple new first test currents corresponding to the new reference current, so that a sudden change can be determined Residual current action value.

According to an embodiment of the present disclosure, determining a target sudden change residual current action value based on multiple sudden change residual current action values may include the following operations.

Based on multiple sudden change residual current action values, the smallest sudden change residual current action value is determined as the target sudden change residual current action value.

According to the embodiment of the present disclosure, the minimum reference current at which the first test current at all phase angles can cause the second residual current protector in loop two to take protective action is determined as the target sudden change residual current action value I, where, The range of the target sudden change residual current action value should be: I _Δno <I ≤ I _Δn , I _Δn represents the first test current at all phase angles that can cause the second residual current protector in loop two to take protective action. Test current, I _Δno represents the rated leakage non-action current, and the rated leakage non-action current can represent the normal leakage current.

According to an embodiment of the present disclosure, the reference current includes a first preset current and one of an interval end value of a sudden change residual current action interval; the sudden change residual current action interval is used to characterize the remaining power for the electronic device in the event of a failure of the electronic device. The current range within which the current protector operates; the first preset current includes the second multiple of the normal leakage current.

According to an embodiment of the present disclosure, the above-mentioned first phase angle difference includes one of the following: 0°, ±30°, ±60°, ±90°, ±120°, ±150°, and 180°.

According to embodiments of the present disclosure, the first preset current can be specifically set to a current of any phase angle according to requirements, and the second multiple can be specifically set according to requirements. For example, the first preset current can include 0, 0.5I _Δno or I _Δno .

According to embodiments of the present disclosure, each reference current corresponds to a plurality of first test currents. For example, when the reference current I _Δn is 0 or 0.5I _Δno , the plurality of first test currents correspond to the first phase of the reference current. The angle difference can be 0°, ±60°, ±120° or 180° respectively. When the reference current I _Δn is I _Δno or the lower limit of the sudden residual current action interval, the first phase angle differences between the plurality of first test currents and the reference current I _Δn may be 0° and ±30° respectively. , ±60°, ±90°, ±120°, ±150°, 180°.

It should be noted that the value of the first phase angle difference is not limited to the above difference value, and it can be any value.

FIG. 2 schematically shows a flow chart of a residual current protection verification method according to another embodiment of the present disclosure.

As shown in Figure 2, the above residual current protection inspection method may also include operations S201 to S207:

In operation S201, the first device is tested using normal leakage current.

In operation S202, the second device is tested using a second preset current, where there is a second phase angle difference between the second preset current and the normal leakage current.

In operation S203, when neither the first residual current protector nor the second residual current protector takes a protective action, a first preset applied current is sequentially applied to the second device until the second residual current protector takes a protective action. Protective action.

In operation S204, a lower limit value of the abrupt residual current action interval is determined according to the second preset current and the plurality of first preset applied currents.

In operation S205, when both the first residual current protector and the second residual current protector take protective actions, a second preset applied current is applied to the second device one after another until the second residual current protector does not. Protective action.

In operation S206, an upper limit value of the sudden change residual current action interval is determined according to the second preset current and the plurality of second preset applied currents.

In operation S207, a sudden change residual current action interval is determined based on the lower limit value and the upper limit value.

According to embodiments of the present disclosure, the second preset current may include a normal leakage current, and the first preset applied current may include a current of any value, for example, it may be 0.1 times the first test current.

According to an embodiment of the present disclosure, after continuously applying the first preset applied current, a second preset current having a second phase angle difference from the normal leakage current is loaded into the circuit two, so that the second residual current protector in the circuit two A protective action occurs. The lower limit value of the sudden change residual current action interval is determined based on the second preset current and the first preset applied current applied multiple times. For example, the lower limit value may be equal to the sum of the second preset current and the first preset applied current applied multiple times.

According to embodiments of the present disclosure, the second preset applied current may include a current of any value, for example, may be 0.1 times the first test current.

According to an embodiment of the present disclosure, after continuously applying the second preset applied current, the second preset current with the second phase angle difference from the normal leakage current is loaded into the circuit two, so that the second residual current protector in the circuit two No protective action occurs. The upper limit value of the sudden change residual current action interval is determined based on the second preset current and the first preset applied current applied multiple times. For example, the upper limit value may be equal to the sum of the second preset current and the first preset applied current applied multiple times.

According to embodiments of the present disclosure, the above residual current protection inspection method may further include the following operations.

Test based on the middle value of the sudden change residual current action interval to obtain a new sudden change residual current action interval.

According to embodiments of the present disclosure, in order to obtain the most accurate mutation residual current action interval with the smallest range, the obtained intermediate value of the mutation residual current action interval can be used as a new second preset current to perform repeated testing.

According to an embodiment of the present disclosure, each time a first preset applied current is applied to the second device for multiple tests, until the second residual current protector takes protective action in multiple tests;

Each time a second preset applied current is applied, the second device is tested multiple times until the second residual current protector does not take protective action during multiple tests.

According to the embodiment of the present disclosure, the number of tests includes but is not limited to 5 times. It should be noted that the number of tests can be specifically set according to the accuracy requirements of the test.

According to an embodiment of the present disclosure, the second phase angle difference includes 180°

According to embodiments of the present disclosure, the second phase angle difference may also include any numerical value, for example, it may be +30°, ±60°, ±90°, ±120°, or ±150°.

According to embodiments of the present disclosure, the above residual current protection inspection method may further include the following operations.

A plurality of second test currents are determined according to the sudden change residual current action interval. Based on each second test current, perform multiple tests on the second device to obtain test results regarding the protection action time of the second residual current protector. When the test results show that the protection action time of each test complies with the standard range of fault current action time corresponding to the second test current, the mutation residual current action interval is determined as the target mutation residual current action interval.

According to embodiments of the present disclosure, the second test current may include, but is not limited to, any value in the mutation residual current action interval.

According to an embodiment of the present disclosure, the test current in loop one may be the normal leakage current I _Δno . The second test current in loop two may be I _Δn1 . Instantly load the second test current into circuit two to measure the time when the second residual current protector takes protective action. During multiple tests, the phase angles of the test current in loop one can be 0°, ±60°, ±120°, and 180° respectively. The phase angle differences between the second test current in loop two and the test current in loop one can be respectively ±120°, ±135°, ±150°, ±165°. Test multiple times at each phase angle, for example, 5 times. The protection action time value obtained in each test should comply with the limit value under I _Δn1 in the standard range of fault current action time.

According to embodiments of the present disclosure, the above residual current protection inspection method may further include the following operations.

The second device is tested multiple times using a plurality of third test currents. For each third test current, when the second residual current protector of the second device does not take a protective action, a third preset applied current is applied to confirm whether the second residual current protector takes a protective action.

According to embodiments of the present disclosure, the test current in loop one may be 0, the third test current in loop two may be the normal leakage current _IΔno , and the phase angle of the normal leakage current may be 0°, ±30°, ±60° °, ±90°, ±120°, ±150° and 180°, and the third test current is suddenly applied in loop two. The number of tests at each phase angle may include but is not limited to 5 times, each The second residual current protector shall not operate during the first test.

According to another embodiment of the present disclosure, the test current in loop one can be 0.5I _Δno or I _Δno at any phase angle, and the test current is loaded into loop one. The third test current in loop two can be the normal leakage current I _Δno . The phase angle difference between the third test current and the test current in loop one can be ±120°, ±135°, ±150° and ±165°. One of them, and the third test current is suddenly applied in loop two. The number of tests at each phase angle may include but is not limited to 5 times. The second residual current protector shall not operate during each test.

According to embodiments of the present disclosure, the above residual current protection inspection method may further include the following operations.

Obtaining a first test result corresponding to each verification current, wherein the first test result is obtained according to a third device loading the test current, and the first test result characterizes the third residual current protector for the third device Whether protective action occurs under each test current condition.

For each verification current, obtain a second test result corresponding to a plurality of fourth test currents, wherein the second test result is obtained according to a situation where the fourth device is respectively loaded with a plurality of fourth test currents, and each fourth There is a third phase angle difference between the test current and the corresponding verification current, and the second test result represents whether the fourth residual current protector for the fourth device produces a protective action under the condition of the fourth test current.

According to an embodiment of the present disclosure, both the third device and the fourth device include at least one first electronic device, a second electronic device and a corresponding residual current protector connected in series, wherein the normal leakage current I _Δn2 of the second electronic device is greater than The normal leakage current I _Δn3 of the first electronic device and the protection action time of the second electronic device are greater than the protection action time of the first electronic device.

According to embodiments of the present disclosure, the verification current may include 0, 0.5I _Δn2 or I _Δn2 . The current value of the fourth test current may be I _Δn2 , and the third phase angle difference may include ±120°, ±150° or 180°. The verification current and the fourth test current are loaded to the third device and the fourth device respectively to determine whether the residual current protector in the third device and the fourth device has a protective action. When a protection action occurs, the residual current protector determines that a leakage fault has occurred through the protection strategy, and then the residual current protector breaks to remove the fault to achieve protection. No protection action occurred, that is, the residual current protector judged that no leakage fault occurred under the existing protection strategy, so the residual current protector did not open.

According to another embodiment of the present disclosure, the verification current may include 0, 0.5I _Δn2 or I _Δn2 . The current value of the fourth test current may be the target sudden change residual current action value of the first electronic device, the target sudden change residual current action value of the second electronic device, or the target sudden change residual current action value of the first electronic device and the second electronic device. The sum of target mutation residual current action values. The third phase angle difference may include 0°, ±30°, ±60°, ±90°, ±120°, ±150° or 180°. The verification current and the fourth test current are loaded to the third device and the fourth device respectively to determine whether the residual current protector in the third device and the fourth device has a protective action. When a protection action occurs, the residual current protector determines that a leakage fault has occurred through the protection strategy, and then the residual current protector breaks to remove the fault to achieve protection. No protection action occurred, that is, the residual current protector judged that no leakage fault occurred under the existing protection strategy, so the residual current protector did not open.

According to another embodiment of the present disclosure, the verification current may include 0, 0.5I _Δn2 or I _Δn2 . The current value of the fourth test current may be the first current, the second current or the normal leakage current of the second electronic device. The third phase angle difference may include 0°. The verification current and the fourth test current are loaded to the third device and the fourth device respectively to determine whether the residual current protector in the third device and the fourth device has a protective action. When a protection action occurs, the residual current protector determines that a leakage fault has occurred through the protection strategy, and then the residual current protector breaks to remove the fault to achieve protection. No protection action occurred, that is, the residual current protector judged that no leakage fault occurred under the existing protection strategy, so the residual current protector did not open. Wherein, the first current = (target sudden change residual current action value of the first electronic device - verification current) + 0.1 × target sudden change residual current action value of the second electronic device. The second current = the target mutation residual current action value of the second electronic device - the verification current.

FIG. 3 schematically shows a block diagram of a residual current protection checking device according to an embodiment of the present disclosure.

As shown in FIG. 3 , the residual current protection checking device 300 may include a first acquisition module 310 , a second acquisition module 320 , a first determination module 330 and a second determination module 340 .

The first acquisition module 310 is used to acquire a reference result corresponding to each reference current, wherein the reference result is obtained according to the situation where the first device is loaded with the reference current, and the reference result represents the first residual current protection for the first device. Whether the device generates protective action under each reference current condition, the reference current is determined based on the mutation residual current action interval.

The second acquisition module 320 is configured to acquire verification results corresponding to multiple first test currents for each reference current, where the verification results are obtained based on the situation where the second device loads multiple first test currents respectively, and each There is a first phase angle difference between a first test current and a corresponding reference current, and the verification result represents whether the second residual current protector for the second device produces a protective action under the condition of the first test current.

The first determining module 330 is configured to determine that the first residual current protector takes a protective action under the condition of the reference current, and when the second residual current protector takes a protective action when multiple first test currents all take place, the reference current Determine the sudden change residual current action value.

The second determination module 340 is configured to determine a target sudden change residual current action value according to a plurality of sudden change residual current action values.

According to an embodiment of the present disclosure, by obtaining a reference result obtained by loading a plurality of reference currents on the first device and a verification result obtained by loading a plurality of first test currents corresponding to each reference current by the second device, the first remaining The current protector takes a protective action under the condition of the reference current, and the second residual current protector determines the reference current as the mutation residual current action value when multiple first test currents all take protective actions, and selects the reference current from the multiple first test currents. The technical means of determining the target sudden change residual current action value in the sudden change residual current action value fully considers the impact of the first phase angle difference between the first test current and the corresponding reference current on the residual current protection, and therefore at least partially overcomes the problem. This solves the technical problem of poor reliability in testing leakage protection methods based on residual current, thereby achieving the technical effect of improving the reliability of testing leakage protection methods based on residual current.

According to an embodiment of the present disclosure, the above-mentioned residual current protection checking device 300 may further include a third determination module.

The third determination module is configured to generate a new reference current based on the reference current when it is determined that one or more first test currents of the second residual current protector do not take protective actions among the plurality of first test currents, wherein , the difference between the new reference current and the reference current may include the first multiple of the first test current.

According to an embodiment of the present disclosure, the second determination module 340 may include a first determination unit.

The first determining unit is configured to determine the smallest sudden change residual current action value as the target sudden change residual current action value based on the plurality of sudden change residual current action values.

According to an embodiment of the present disclosure, the reference current may include one of a first preset current and an interval end value of the mutation residual current action interval. The abrupt residual current action interval is used to characterize the current range for the action of the residual current protector of electronic equipment when the electronic equipment fails. The first preset current may include a second multiple of the normal leakage current.

According to an embodiment of the present disclosure, the above-mentioned residual current protection verification device 300 may further include a first test module, a second test module, a first iterative application module and a fourth determination module.

The first test module is used to test the first device using normal leakage current.

The second testing module is used to test the second device using a second preset current, wherein there is a second phase angle difference between the second preset current and the normal leakage current.

The first iterative application module is used to sequentially apply a first preset applied current on the second device until the second residual current occurs when neither the first residual current protector nor the second residual current protector takes a protective action. The protector takes protective action.

The fourth determination module is used to determine the lower limit value of the sudden change residual current action interval according to the second preset current and the plurality of first preset applied currents.

According to an embodiment of the present disclosure, the above-mentioned residual current protection testing device 300 may further include a second iterative application module, a fifth determination module and a sixth determination module.

The second iterative application module is used to sequentially apply a second preset applied current on the second device until the second residual current protection occurs when both the first residual current protector and the second residual current protector take protective actions. The device does not take protective action.

The fifth determination module is configured to determine the upper limit of the mutation residual current action interval according to the second preset current and the plurality of second preset applied currents.

The sixth determination module is used to determine the sudden change residual current action interval according to the lower limit value and the upper limit value.

According to an embodiment of the present disclosure, the above-mentioned residual current protection testing device 300 may further include a third test module.

The third test module is used to perform testing based on the intermediate value of the sudden change residual current action interval to obtain a new sudden change residual current action interval.

According to an embodiment of the present disclosure, multiple tests are performed on the second device each time a first preset applied current is applied, until the second residual current protector does not take protective action during the multiple tests.

Each time a second preset applied current is applied, the second device is tested multiple times until the second residual current protector takes protective action in multiple tests.

According to an embodiment of the present disclosure, the second phase angle difference may include 180°.

According to an embodiment of the present disclosure, the above-mentioned residual current protection checking device 300 may further include a seventh determination module, an eighth determination module and a ninth determination module.

The seventh determination module is used to determine a plurality of second test currents according to the sudden change residual current action interval.

The eighth determination module is configured to perform multiple tests on the second device based on each second test current to obtain test results regarding the protection action time of the second residual current protector.

The ninth determination module is used to determine the mutation residual current action interval as the target mutation residual current action interval when the test results indicate that the protection action time of each test meets the fault current action time standard range corresponding to the second test current.

According to embodiments of the present disclosure, the first phase angle difference may include one of the following: 0°, ±30°, ±60°, ±90°, ±120°, ±150°, and 180°.

Any multiple of the modules, units, or at least part of the functions of any multiple of the modules according to the embodiments of the present disclosure may be implemented in one module. Any one or more of the modules and units according to the embodiments of the present disclosure can be split into multiple modules for implementation. Any one or more of the modules and units according to the embodiments of the present disclosure may be at least partially implemented as hardware circuits, such as field programmable gate arrays (Field Programmable Gate Array, FPGA), programmable logic arrays (Programmable Logic Arrays, PLA), system-on-a-chip, system-on-substrate, system-on-package, Application Specific Integrated Circuit (ASIC), or by hardware or firmware that can be implemented in any other reasonable way to integrate or package circuits, Or it can be implemented in any one of the three implementation methods of software, hardware and firmware, or in an appropriate combination of any of them. Alternatively, one or more of the modules and units according to the embodiments of the present disclosure may be at least partially implemented as a computer program module, and when the computer program module is executed, corresponding functions may be performed.

For example, any one of the first acquisition module 310, the second acquisition module 320, the first determination module 330 and the second determination module 340 can be combined and implemented in one module/unit, or any one of the modules/units can be implemented by Split into multiple modules/units. Alternatively, at least part of the functionality of one or more of these modules/units may be combined with at least part of the functionality of other modules/units/sub-units and implemented in one module/unit. According to an embodiment of the present disclosure, at least one of the first acquisition module 310 , the second acquisition module 320 , the first determination module 330 and the second determination module 340 may be at least partially implemented as a hardware circuit, such as a field programmable gate array. (FPGA), programmable logic array (PLA), system-on-a-chip, system-on-substrate, system-on-package, application-specific integrated circuit (ASIC), or any other reasonable means by which circuits can be integrated or packaged It can be implemented by firmware, or it can be implemented by any one of the three implementation methods of software, hardware and firmware or by an appropriate combination of any of them. Alternatively, at least one of the first obtaining module 310, the second obtaining module 320, the first determining module 330 and the second determining module 340 may be at least partially implemented as a computer program module, and when the computer program module is executed, Perform the corresponding function.

It should be noted that the residual current protection testing device part in the embodiment of the present disclosure corresponds to the residual current protection testing method part in the embodiment of the present disclosure. For a description of the residual current protection testing device part, please refer to the residual current protection testing method. part, which will not be repeated here.

Figure 4 schematically shows a block diagram of an electronic device suitable for implementing the above-described method according to an embodiment of the present disclosure. The electronic device shown in FIG. 4 is only an example and should not impose any limitations on the functions and scope of use of the embodiments of the present disclosure.

As shown in Figure 4, an electronic device 400 according to an embodiment of the present disclosure includes a processor 401, which can be loaded into a random access memory according to a program stored in a read-only memory (Read-Only Memory, ROM) 402 or from a storage part 408. (Random Access Memory, RAM) 403 to perform various appropriate actions and processes. Processor 401 may include, for example, a general-purpose microprocessor (eg, a CPU), an instruction set processor and/or associated chipset, and/or a special-purpose microprocessor (eg, an application specific integrated circuit (ASIC)), among others. Processor 401 may also include onboard memory for caching purposes. The processor 401 may include a single processing unit or multiple processing units for performing different actions of the method flow according to embodiments of the present disclosure.

In the RAM 403, various programs and data required for the operation of the electronic device 400 are stored. The processor 401, ROM 402 and RAM 403 are connected to each other through a bus 404. The processor 401 performs various operations according to the method flow of the embodiment of the present disclosure by executing programs in the ROM 402 and/or RAM 403. It should be noted that the program may also be stored in one or more memories other than ROM 402 and RAM 403. The processor 401 may also perform various operations according to the method flow of embodiments of the present disclosure by executing programs stored in the one or more memories.

According to embodiments of the present disclosure, the electronic device 400 may further include an input/output (I/O) interface 405 that is also connected to the bus 404 . The system 400 may also include one or more of the following components connected to the I/O interface 405: an input portion 406 including a keyboard, a mouse, etc.; ) and the like, and an output section 407 such as a speaker, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN card, a modem, etc. The communication section 409 performs communication processing via a network such as the Internet. Driver 410 is also connected to I/O interface 405 as needed. Removable media 411, such as magnetic disks, optical disks, magneto-optical disks, semiconductor memories, etc., are installed on the drive 410 as needed, so that a computer program read therefrom is installed into the storage portion 408 as needed.

According to embodiments of the present disclosure, the method flow according to the embodiments of the present disclosure may be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product including a computer program carried on a computer-readable storage medium, the computer program containing program code for performing the method illustrated in the flowchart. In such embodiments, the computer program may be downloaded and installed from the network via communication portion 409 and/or installed from removable media 411 . When the computer program is executed by the processor 401, the above-described functions defined in the system of the embodiment of the present disclosure are performed. According to embodiments of the present disclosure, the systems, devices, devices, modules, units, etc. described above may be implemented by computer program modules.

The present disclosure also provides a computer-readable storage medium. The computer-readable storage medium may be included in the device/device/system described in the above embodiments; it may also exist independently without being assembled into the device/system. in the device/system. The above computer-readable storage medium carries one or more programs. When the above one or more programs are executed, the method according to the embodiment of the present disclosure is implemented.

According to embodiments of the present disclosure, the computer-readable storage medium may be a non-volatile computer-readable storage medium. For example, it may include but is not limited to: portable computer disk, hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM (Erasable Programmable Read Only Memory, EPROM) or flash memory), Portable compact disk read-only memory (Computer Disc Read-Only Memory, CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above. In this disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device.

For example, according to embodiments of the present disclosure, the computer-readable storage medium may include one or more memories other than ROM 402 and/or RAM 403 and/or ROM 402 and RAM 403 described above.

Embodiments of the present disclosure also include a computer program product, which includes a computer program. The computer program includes program code for executing the method provided by the embodiment of the present disclosure. When the computer program product is run on an electronic device, the program The code is used to enable the electronic device to implement the residual current protection verification method provided by the embodiment of the present disclosure.

When the computer program is executed by the processor 401, the above-mentioned functions defined in the system/device of the embodiment of the present disclosure are performed. According to embodiments of the present disclosure, the systems, devices, modules, units, etc. described above may be implemented by computer program modules.

In one embodiment, the computer program may rely on tangible storage media such as optical storage devices and magnetic storage devices. In another embodiment, the computer program can also be transmitted and distributed in the form of a signal on a network medium, and downloaded and installed through the communication part 409, and/or installed from the removable medium 411. The program code contained in the computer program can be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

According to the embodiments of the present disclosure, the program code for executing the computer program provided by the embodiments of the present disclosure may be written in any combination of one or more programming languages. Specifically, high-level procedural and/or object-oriented programming may be utilized. programming language, and/or assembly/machine language to implement these computational procedures. Programming languages include, but are not limited to, programming languages such as Java, C++, python, "C" language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, partly on a remote computing device, or entirely on the remote computing device or server. In situations involving remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device, such as provided by an Internet service. (business comes via Internet connection).

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operations of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more logic functions that implement the specified executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown one after another may actually execute substantially in parallel, or they may sometimes execute in the reverse order, depending on the functionality involved. It will also be noted that each block in the block diagram or flowchart illustration, and combinations of blocks in the block diagram or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or operations, or may be implemented by special purpose hardware-based systems that perform the specified functions or operations. Achieved by a combination of specialized hardware and computer instructions. Those skilled in the art will understand that features recited in various embodiments and/or claims of the present disclosure may be combined and/or combined in various ways, even if such combinations or combinations are not explicitly recited in the present disclosure. In particular, various combinations and/or combinations of features recited in the various embodiments and/or claims of the disclosure may be made without departing from the spirit and teachings of the disclosure. All such combinations and/or combinations fall within the scope of this disclosure.

The embodiments of the present disclosure have been described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although each embodiment is described separately above, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and these substitutions and modifications should all fall within the scope of the present disclosure.

Claims (13)

1. A residual current protection testing method, comprising:

obtaining a reference result corresponding to each reference current, wherein the reference result is obtained according to the condition that a first device loads the reference current, the reference result represents whether a first residual current protector for the first device generates a protection action under each condition of the reference current, and the reference current is determined according to a sudden change residual current action interval;

obtaining a verification result corresponding to a plurality of first test currents for each reference current, wherein the verification result is obtained according to the condition that a second device loads the plurality of first test currents respectively, each first test current and the corresponding reference current have a first phase angle difference, and the verification result represents whether a second residual current protector for the second device generates a protection action under the condition of the first test currents;

Determining the reference current as an abrupt residual current action value when the first residual current protector is determined to have a protection action under the condition of the reference current and the second residual current protector is determined to have a protection action under the condition that a plurality of first test currents are all subjected to the protection action; and

determining a target abrupt change residual current action value according to a plurality of abrupt change residual current action values;

wherein each reference current corresponds to a plurality of first test currents, which are equal to the reference current I _Δn 0 or 0.5I _Δno In this case, the first phase angle differences of the plurality of first test currents and the reference current are 0 °, ±60°, ±120°, or 180 °, respectively, I _Δno Representing rated leakage non-action current;

at reference current I _Δn Is I _Δno Or when the lower limit value of the residual current operation section is suddenly changed, a plurality of first test currents and the reference current I _Δn Is 0 °, ±30°, ±60°, ±90°, ±120°, ±150°, or 180°, respectively.

2. The method of claim 1, further comprising:

and generating a new reference current according to the reference current under the condition that the second residual current protector is determined to exist one or more first test currents in a plurality of first test currents and no protection action occurs, wherein the difference value between the new reference current and the reference current comprises a first test current of a first multiple.

3. The method of claim 1, wherein the determining a target abrupt change residual current action value from a plurality of the abrupt change residual current action values comprises:

and determining the abrupt change residual current action value with the smallest value as a target abrupt change residual current action value based on the plurality of abrupt change residual current action values.

4. The method of claim 1, wherein the reference current comprises one of a first preset current and a section end of the abrupt residual current action section; the abrupt change residual current action interval is used for representing a current range for the action of a residual current protector of the electronic equipment under the condition that the electronic equipment fails; the first preset current includes a second multiple of the normal leakage current.

5. The method of claim 4, further comprising:

testing the first device with the normal leakage current;

testing the second device by using a second preset current, wherein a second phase angle difference exists between the second preset current and the normal leakage current;

under the condition that the first residual current protector and the second residual current protector do not generate protection actions, a first preset applied current is applied to the second equipment successively until the second residual current protector generates protection actions;

And determining the lower limit value of the abrupt residual current action interval according to the second preset current and the first preset applied currents.

6. The method of claim 5, further comprising:

under the condition that the first residual current protector and the second residual current protector generate protection actions, a second preset applied current is applied to the second equipment successively until the second residual current protector does not generate the protection actions;

determining an upper limit value of the abrupt residual current action interval according to the second preset current and a plurality of second preset applied currents;

and determining the abrupt residual current action interval according to the lower limit value and the upper limit value.

7. The method of claim 6, wherein the second device is tested a plurality of times by applying one of the first preset applied currents at a time until no protection action occurs by the second residual current protector in the plurality of tests;

and carrying out multiple tests on the second equipment by applying the second preset applied current each time until the second residual current protector generates protection action in the multiple tests.

8. The method of claim 5, further comprising:

And testing according to the intermediate value of the abrupt change residual current action interval to obtain a new abrupt change residual current action interval.

9. The method of claim 5, wherein the second phase angle difference comprises 180 °.

10. The method of claim 1, further comprising:

determining a plurality of second test currents according to the abrupt residual current action interval;

based on each second test current, carrying out multiple tests on the second equipment to obtain a test result about the protection action time of the second residual current protector;

and determining the abrupt change residual current operation section as a target abrupt change residual current operation section under the condition that the test result shows that the protection operation time of each test accords with a fault current operation time standard range corresponding to the second test current.

11. A residual current protection testing device comprising:

the first acquisition module is used for acquiring a reference result corresponding to each reference current, wherein the reference result is obtained according to the condition that the first equipment loads the reference current, the reference result represents whether a first residual current protector for the first equipment generates a protection action or not under the condition of each reference current, and the reference current is determined according to an abrupt residual current action interval;

The second acquisition module is used for acquiring verification results corresponding to a plurality of first test currents for each reference current, wherein the verification results are obtained according to the condition that a second device loads the plurality of first test currents respectively, each first test current and the corresponding reference current have a first phase angle difference, and the verification results represent whether a second residual current protector for the second device generates a protection action under the condition of the first test currents;

a first determining module, configured to determine, when it is determined that the first residual current protector performs a protection action under the condition of the reference current, and the second residual current protector performs a protection action under the condition that a plurality of first test currents perform protection actions, the reference current as an abrupt residual current action value; and

the second determining module is used for determining a target abrupt change residual current action value according to a plurality of abrupt change residual current action values;

wherein each reference current corresponds to a plurality of first test currents, which are equal to the reference current I _Δn 0 or 0.5I _Δno In this case, the first phase angle differences of the plurality of first test currents and the reference current are 0 °, ±60°, ±120°, or 180 °, respectively, I _Δno Representing rated leakage non-action current;

at reference current I _Δn Is I _Δno Or a plurality of first test currents and the reference value when the lower limit value of the residual current operation section is suddenly changedExamination current I _Δn Is 0 °, ±30°, ±60°, ±90°, ±120°, ±150°, or 180°, respectively.

12. An electronic device, comprising:

one or more processors;

a memory for storing one or more programs,

wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-10.

13. A computer readable storage medium having stored thereon executable instructions which when executed by a processor cause the processor to implement the method of any of claims 1 to 10.