CN111064167A - Protection setting processing method - Google Patents
Protection setting processing method Download PDFInfo
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- CN111064167A CN111064167A CN201911425430.7A CN201911425430A CN111064167A CN 111064167 A CN111064167 A CN 111064167A CN 201911425430 A CN201911425430 A CN 201911425430A CN 111064167 A CN111064167 A CN 111064167A
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- current
- value
- switch
- distribution box
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a protection setting processing method. Wherein, this method is applied to the block terminal, includes: acquiring a maximum current value of a feeder line of a distribution box and a long-delay minimum setting value of a feeder line switch; determining a long-delay current fixed value of a switch of the distribution box according to the maximum current value of the feeder line and the minimum long-delay setting value of the feeder line switch; acquiring load impact current of a feeder line of a distribution box; determining a short delay current fixed value of a switch of the distribution box according to the load impact current of a feeder line of the distribution box; and configuring according to the fixed value of the long delay current and the fixed value of the short delay current. The invention solves the technical problem of inaccuracy caused by the fact that other factors are not considered in determination of the ATS distribution box in the prior art.
Description
Technical Field
The invention relates to the field of power supply equipment protection setting, in particular to a protection setting processing method.
Background
In order to promote the standardization of the work of a 0.4 kV power distribution system of a power distribution network, standardize the setting of the fixed value of a low-voltage electronic release, further improve the reliability of power supply of the low-voltage power distribution system, ensure safe and reliable power supply of customers, correspondingly go out of the principle of protecting the fixed value of low-voltage equipment of a distribution transformer, and be widely applied to the power distribution network system. However, the principle is mainly applicable to a low-voltage main inlet, a bus coupler and a feeder of a transformer, and no principle regulation is performed on a next-stage Automatic Transfer Switching (ATS) distribution box which is arranged for supplying power to an important load. For example, in a conventional low-voltage distribution system, a low-voltage main switch, a tie switch and a feeder line constant value setting principle are adopted, the low-voltage main switch and the tie switch are provided with electronic releases at least with long-delay and short-delay protection functions, the feeder line switch is preferably provided with the electronic releases at least with long-delay and instant protection functions, but the ATS box constant value setting is not involved. Therefore, the prior art does not consider other factors in determining the ATS distribution box, resulting in inaccuracy.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a protection setting processing method, which at least solves the technical problem of inaccuracy caused by the fact that other factors are not considered in determination of an ATS distribution box in the prior art.
According to an aspect of the embodiments of the present invention, there is provided a protection setting processing method applied to a distribution box, including: acquiring a maximum current value of a feeder line of the distribution box and a long-delay minimum setting value of a feeder line switch; determining a long-delay current fixed value of a switch of the distribution box according to the maximum current value of the feeder line and the minimum long-delay setting value of the feeder line switch; acquiring load impact current of a feeder line of the distribution box; determining a short-delay current fixed value of a switch of the distribution box according to the load impact current of a feeder line of the distribution box; and configuring according to the long delay current fixed value and the short delay current fixed value.
Optionally, the method further comprises: configuring an instantaneous protection current constant value, wherein the configured instantaneous protection current constant value is adjusted to be maximum when adjustable.
Optionally, determining the long-delay current constant value of the switch of the distribution box according to the maximum current value of the feeder line and the minimum long-delay setting value of the feeder line switch comprises: calculating a predetermined multiple of a maximum current value of the feeder line; and when the preset multiple of the maximum current value does not reach the minimum long-delay setting value of the feeder switch, setting according to the minimum long-delay setting value of the feeder switch.
Optionally, the predetermined multiple is 1.3 times.
Optionally, determining the short-delay current constant value of the switch of the distribution box according to the load rush current of the feeder of the distribution box comprises: and obtaining the short delay current constant value according to 4 times of setting value, wherein the set value can avoid the preset times of the load impact current.
Optionally, the predetermined multiple is 5 times.
Optionally, the method further comprises: when the time is adjustable, setting according to 6 times of setting values to obtain a long delay time fixed value; and configuring according to the fixed value of the long delay time.
Optionally, the method further comprises: when the time is adjustable, setting according to 0.4 second to obtain a short delay time fixed value; and configuring according to the short delay time fixed value.
Optionally, the method further comprises: and canceling or adjusting various kinds of protection of the incoming line switch of the distribution box to the maximum.
Optionally, the switch of the switchbox comprises at least one of: automatic transfer switch ATS, solid-state transfer switch SSTS.
In the embodiment of the invention, the protection setting processing method is applied to a distribution box, and the maximum current value of a feeder line of the distribution box and the minimum setting value of long delay of a feeder line switch are obtained; determining a long-delay current fixed value of a switch of the distribution box according to the maximum current value of the feeder line and the minimum long-delay setting value of the feeder line switch; acquiring load impact current of a feeder line of the distribution box; determining a short-delay current fixed value of a switch of the distribution box according to the load impact current of a feeder line of the distribution box; according to the mode of configuring the long delay current fixed value and the short delay current fixed value, the long delay current fixed value and the short delay current fixed value of the switch of the distribution box are obtained through the maximum current value of the feeder line of the distribution box, the load impact current and the long delay minimum setting value of the feeder line switch, and the purpose of configuring the long delay current fixed value and the short delay current fixed value in a standardized mode is achieved, so that the low-voltage protection fixed value standardization of the distribution box is achieved, the accuracy of the protection fixed value is improved, the technical effect of high reliability of important load power supply is achieved, and the technical problem that other factors are not considered in determining the ATS distribution box in the prior art, and accordingly inaccurate technical problems are caused is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow diagram of a protection tuning process method according to an embodiment of the invention;
fig. 2 is a schematic diagram of a top and bottom protection fixed value fitting curve according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to an embodiment of the present invention, there is provided an embodiment of a protection tuning process method, it should be noted that the steps illustrated in the flowchart of the figure may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Example 1
Fig. 1 is a flowchart of a protection setting processing method according to an embodiment of the present invention, and as shown in fig. 1, the protection setting processing method is applied to a distribution box, and includes the following steps:
step S102, obtaining a maximum current value of a feeder line of a distribution box and a minimum setting value of long delay of a feeder line switch;
step S104, determining a long-delay current fixed value of a switch of the distribution box according to the maximum current value of the feeder line and the minimum long-delay setting value of the switch of the feeder line;
step S106, acquiring load impact current of a feeder line of the distribution box;
step S108, determining a short delay current fixed value of a switch of the distribution box according to the load impact current of a feeder line of the distribution box;
and step S110, configuring according to the fixed value of the long delay current and the fixed value of the short delay current.
Through the steps, the fixed value of the long delay current and the fixed value of the short delay current of the switch of the distribution box can be obtained through the maximum current value of the feeder line of the distribution box, the load impact current and the minimum setting value of the long delay of the switch of the feeder line, and the purpose of configuring the fixed value of the long delay current and the fixed value of the short delay current in a standardized way is achieved, so that the standardization of the low-voltage protection fixed value of the distribution box is realized, the accuracy of the protection fixed value is improved, the technical effect of high reliability of important load power supply is achieved, and the technical problem that other factors are not considered in the determination of the ATS distribution box in the prior art, and the technical.
In addition, the method can realize zero flicker in the process of power supply of major guarantee activities.
Optionally, the method further comprises: and configuring an instantaneous protection current constant value, wherein the configured instantaneous protection current constant value is adjusted to be maximum when adjustable.
And the fixed value of the instantaneous protection current is less than or equal to 2 times of rated current of the transformer.
Optionally, determining the long-delay current constant value of the switch of the distribution box according to the maximum current value of the feeder and the minimum long-delay setting value of the feeder switch comprises: calculating a predetermined multiple of a maximum current value of the feeder line; and when the preset multiple of the maximum current value does not reach the minimum setting value of the long delay of the feeder switch, setting according to the minimum setting value of the long delay of the feeder switch.
By the method, long-delay protection can be realized, and optionally, the long delay generally adopts inverse time limit.
Optionally, the predetermined multiple is 1.3 times.
For example, long latency: and calculating 1.3 times of the maximum current value of the feeder line, setting according to the minimum value (100A of the feeder line switch 250 and 64A of the feeder line switch 160) when the minimum setting value of the long delay of the feeder line switch cannot be reached, and setting according to 4 seconds when the time is adjustable.
Optionally, determining the short-delay current setting of the switch of the distribution box according to the load rush current of the feeder of the distribution box comprises: and setting according to the 4 times of setting value to obtain a short delay current fixed value, wherein the set value can avoid the preset times of load impact current.
For example, the setting is carried out according to a 4-time setting value, the value can avoid the impact current of the load, most feeder cables can be cut off when single-phase or three-phase ground faults occur, and the setting is carried out according to 0.4 second when the time is adjustable.
Optionally, the predetermined multiple is 5 times. The maximum current value of the feeder line is the impact current which avoids the load,
optionally, the method further comprises: when the time is adjustable, setting according to 6 times of setting values to obtain a long delay time fixed value; and configuring according to the fixed value of the long delay time.
The long-delay current constant value can avoid the load current of the transformer.
For example, the fixed value of the long delay time is between 2 and 6 seconds when the long delay current is 6 times.
Optionally, the method further comprises: when the time is adjustable, setting according to 0.4 second to obtain a short delay time fixed value; and configuring according to the fixed value of the short delay time.
The method can realize short delay protection, and optionally, the short delay generally adopts a timing limit.
In the specific implementation process, the method can be appropriately adjusted according to the application scenario.
Optionally, the method further comprises: various types of protection of the inlet switches of the distribution box are cancelled or adjusted to the maximum.
In order to meet the reliable matching of upper and lower protection (such as a distribution transformer and a distribution box) and ensure the selectivity of protection actions of all levels of trippers during faults and avoid the expansion of a power failure range, various protections of an inlet switch of the distribution box can be cancelled or adjusted to the maximum according to actual conditions.
Fig. 2 is a schematic diagram of a fixed-value matching curve of upper and lower protection stages according to an embodiment of the present invention, and as shown in fig. 2, various types of protection of an incoming line switch can be cancelled (or adjusted to the maximum) by referring to a protection matching curve graph.
Optionally, the switch of the electrical box comprises at least one of: automatic transfer switch ATS, solid-state transfer switch SSTS.
The automatic transfer switch ATS is used to cut off power supply to a load when switching a power supply, and in a specific implementation process, the ATS may be applied to conversion of alternating current or direct current of different voltages.
Alternatively, when the ATS is applied to conversion of the alternating current, the voltage of the alternating current is equal to or less than a first predetermined voltage, which may be 1000V; when the ATS is applied to conversion of the direct current, the voltage of the direct current is equal to or less than a second predetermined voltage, which may be 1500V.
The SSTS can adopt a pure thyristor valve, or a composite structure of the thyristor valve and a quick switch which are connected in parallel, and can switch a power supply in a short time, thereby effectively ensuring the safety and reliability of Switching under high-quality power supply.
In the implementation process, any one of the switches can be selected as a switch of the distribution box according to the requirement.
Example 2
According to another aspect of the embodiments of the present invention, there is also provided a storage medium, where the storage medium includes a stored program, and when the program runs, the apparatus where the storage medium is located is controlled to execute any one of the protection setting processing methods.
Example 3
According to another aspect of the embodiments of the present invention, there is also provided an apparatus, including: a memory and a processor, the memory storing a computer program; a processor for executing a computer program stored in the memory, the computer program when running causing the processor to perform any one of the protection tuning processing methods described above.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911425430.7A CN111064167B (en) | 2019-12-31 | 2019-12-31 | Protection setting processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911425430.7A CN111064167B (en) | 2019-12-31 | 2019-12-31 | Protection setting processing method |
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| CN111064167A true CN111064167A (en) | 2020-04-24 |
| CN111064167B CN111064167B (en) | 2022-06-21 |
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Citations (5)
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|---|---|---|---|---|
| US5627718A (en) * | 1994-11-18 | 1997-05-06 | Eaton Corporation | Apparatus providing protection and metering in an ac electrical system utilizing a multi-function sampling technique |
| CN101202185A (en) * | 2006-12-12 | 2008-06-18 | 张世兴 | Intelligent secure prevention circuit breakers |
| CN103491692A (en) * | 2013-10-14 | 2014-01-01 | 广东北江开关厂有限公司 | Intelligent electric system for illumination |
| CN203521905U (en) * | 2013-09-12 | 2014-04-02 | 腾飞电器有限公司 | Terminal intelligent modularization distribution box |
| CN103840424A (en) * | 2014-03-20 | 2014-06-04 | 国家电网公司 | Automatic constant value setting microcomputer-based line protection implementation method |
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2019
- 2019-12-31 CN CN201911425430.7A patent/CN111064167B/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| US5627718A (en) * | 1994-11-18 | 1997-05-06 | Eaton Corporation | Apparatus providing protection and metering in an ac electrical system utilizing a multi-function sampling technique |
| CN101202185A (en) * | 2006-12-12 | 2008-06-18 | 张世兴 | Intelligent secure prevention circuit breakers |
| CN203521905U (en) * | 2013-09-12 | 2014-04-02 | 腾飞电器有限公司 | Terminal intelligent modularization distribution box |
| CN103491692A (en) * | 2013-10-14 | 2014-01-01 | 广东北江开关厂有限公司 | Intelligent electric system for illumination |
| CN103840424A (en) * | 2014-03-20 | 2014-06-04 | 国家电网公司 | Automatic constant value setting microcomputer-based line protection implementation method |
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