CN110611371B - System and method for testing time setting and timekeeping of distribution automation equipment - Google Patents

Abstract

The invention relates to a time synchronization and punctuality test system and method for distribution automation equipment. The system includes: a standard clock module, a network interaction module, an analog test master station, a time stamp event trigger module and distribution automation equipment; the network interaction modules are respectively Two-way connection with the simulation test master station, time stamping event trigger module and distribution automation equipment; one-way connection between the network interaction module and the standard clock module; two-way connection between the simulation test master station and distribution automation equipment; Time synchronization function and punctuality performance test requirements of electrical automation equipment, realize the master station time synchronization and SNTP time synchronization of distribution automation terminal or distribution line fault indicator, and realize interference time synchronization and punctuality performance test; refer to the test process. The selection of time is more scientific and accurate, which can effectively eliminate the external environment interference in the communication process between the distribution automation equipment based on wireless communication and the main power distribution station, and improve the correctness of the test results.

Description

A timing and punctuality test system and method for distribution automation equipment

technical field

The invention belongs to the technical field of time synchronization function and punctuality performance detection of distribution automation equipment, and in particular relates to a time synchronization and punctuality test system and method for distribution automation equipment.

Background technique

Promoting the application of distribution automation technology will help to comprehensively improve the active perception and decision-making control capabilities of the operating status of the distribution network, and effectively support the intelligent operation and maintenance management and control of the distribution network. As an important part of the distribution automation system, distribution automation equipment is responsible for real-time monitoring and control of primary equipment in the distribution network, realizing fault detection and location of distribution lines, and providing powerful tools for distribution network accident analysis, fault isolation and recovery. support. The time consistency in the distribution automation system is the precondition to ensure the realization of its functions. The time synchronization function and the punctuality performance are important indicators of the time synchronization of the distribution automation equipment. At present, the distribution automation equipment can accept the distribution master station or other The time synchronization command of the time synchronization device maintains synchronization with the system time, and at the same time, it can identify ineffective time interference and give reasonable feedback, and after the device is successfully timed, even if the timing signal is lost, it can still maintain the device's own time accuracy.

In order to ensure that the distribution automation equipment meets the requirements of the standard specification before it is put into operation in the power grid, it is necessary to test its time synchronization function and punctuality performance, but the existing detection has the following problems:

(1) It is inconvenient to intuitively obtain the current time of distribution automation equipment. It is necessary to receive the time-stamped message information uploaded by distribution automation equipment with the help of the simulation test master station, and obtain its current time from it;

(2) The existing detection method is implemented under the condition of ignoring the communication delay between the distribution automation equipment and the simulation test master station. For the distribution automation terminal equipment connected to the distribution master station by wire, Due to less external interference, the influence of its communication time on the test results is limited; however, for equipment such as distribution line fault indicators that are wirelessly connected to the main power distribution station, because its communication time is easily affected by the external environment, However, the timing/punctuality time specified by the standard is extremely short, which often affects the test results.

SUMMARY OF THE INVENTION

The invention provides a timing and punctuality test system and method for power distribution automation equipment, the purpose of which is to eliminate the influence of communication delay on test results in the test process and to improve the correctness of test results.

The purpose of this invention is to adopt following technical scheme to realize:

A timing and punctuality testing system for power distribution automation equipment, the improvement lies in that the system comprises:

Standard clock module, network interaction module, analog test master station, time stamping event trigger module and distribution automation equipment;

The network interaction module is respectively bidirectionally connected with the simulation test master station, the time stamp event trigger module and the distribution automation equipment;

The network interaction module is unidirectionally connected to the standard clock module;

The simulation test master station is bidirectionally connected with the distribution automation equipment;

The standard clock module is used to send GPS/Beidou system timing signals to the network interaction module, and realize SNTP time synchronization of power distribution automation equipment;

The network interaction module is used to receive the GPS/Beidou system timing signal to calibrate its own time, and use it as the standard clock time of the entire test system; build a local area network to provide a communication interface for the access device;

The time stamp event trigger module is used to send a trigger event signal with a time stamp to the distribution automation equipment according to the control command issued by the simulation test master station, and upload the trigger event information to the simulation test master station through the network interaction module ;

The simulated test master station is used to issue control commands to the time stamp event triggering module; receive the trigger event information uploaded by the time stamp event trigger module, use the action start time in the trigger event information as a reference time, and receive the test event information. The time-stamped message information uploaded by the distribution automation equipment, extract the current time of the distribution automation equipment, determine the current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluate according to the current time error Timing and punctuality performance of distribution automation equipment.

Preferably, the trigger event signal with time stamp is an analog switch opening and closing action signal, and the trigger event information is analog switch opening and closing action information.

Preferably, the time stamp event triggering module includes a signal source and a wave recording module connected in sequence;

The signal source is used to simulate the current mutation or phase electric field intensity mutation operation scenario of the distribution line according to the control command issued by the simulation test master station, send the current mutation or phase electric field intensity mutation signal to the distribution automation equipment, and trigger the distribution line. The electric line fault indicator starts the wave recording function;

The wave recording module is used for monitoring and recording the signal output by the signal source, generating a waveform file marking the wave recording start time parameter, and uploading it to the simulation test master station through the network interaction module.

Preferably, determining the current time error of the distribution automation equipment under test according to the reference time and the current time, and evaluating the timing and punctuality performance of the distribution automation equipment according to the current time error, including:

(1) Determine the time synchronization error Δt1=T0-T1 of the distribution automation equipment under test according to the difference between the reference time T0 and the current time T1, and judge whether the time synchronization error Δt1 is less than the first threshold, and if so, proceed to the next step. One-step test; otherwise, the time-synchronization function of the tested distribution automation equipment does not meet the time-synchronization requirements, and the test ends;

(2) Send a control command with an invalid time to the distribution automation equipment under test, and determine the time synchronization error Δt2=T2-T3 of the distribution automation equipment under test according to the difference between the reference time T0 and the current time T1, Determine whether the time synchronization error Δt2 is less than the first threshold, if so, proceed to the next test; otherwise, the time synchronization function of the tested distribution automation equipment does not meet the time synchronization requirements, and the test ends;

(3) Take the action start time in the trigger event information as the reference time T4, take the time when the distribution automation equipment uploads the time stamped event information as the current time T5 of the device, and determine the measured value according to the difference between the reference time T4 and the current time T5 Timing error of distribution automation equipment △t3=T4-T5;

(4) Disconnect the communication link with the distribution automation equipment, and maintain the punctuality time T required by the equipment standby operation standard;

Re-establish the network connection relationship with the distribution automation equipment, and determine the time synchronization error Δt4=T6-T7 of the distribution automation equipment under test according to the difference between the reference time T6 and the current time T7;

According to the difference between the timing error Δt4 and the timing error Δt3, determine the punctual error time Δt=Δt4-Δt3, and judge whether the punctual error time Δt is less than the second threshold; if so, the distribution under test The automation equipment meets the requirements; otherwise, the distribution automation equipment under test does not meet the punctuality requirements.

Preferably, the two-way connection between the simulation test master station and the distribution automation equipment includes:

The simulation test master station is bidirectionally connected with the distribution automation equipment through the RJ Ethernet interface or the RS232 serial port.

Preferably, the standard clock module and the network interaction module follow the SNTP protocol; the simulation test master station and the network interaction module follow the TCP protocol, the IP protocol and the IEC60870-5-104 protocol; the distribution automation equipment Comply with the TCP protocol, IP protocol, SNTP protocol and IEC60870-5-104 protocol with the network interaction module.

A timing and punctuality testing method for distribution automation equipment, the improvement lies in that the method comprises:

The standard clock module sends the GPS/Beidou system timing signal to the network interaction module, and realizes the SNTP time synchronization of the distribution automation equipment;

The network interaction module receives the GPS/Beidou system timing signal to calibrate its own time and use it as the standard clock time of the entire test system;

Simulate the test master station to issue control commands to the time stamp event trigger module;

The time stamp event triggering module sends a trigger event signal with time stamp to the distribution automation equipment according to the control command issued by the simulation test master station, and uploads the trigger event information to the simulation test master station through the network interaction module;

The simulation test master station receives the trigger event information uploaded by the time stamp event trigger module, takes the action start time in the trigger event information as the reference time, receives the time stamp message information uploaded by the distribution automation equipment under test, and extracts the power distribution The current time of the automation equipment is determined according to the reference time and the current time, and the current time error of the distribution automation equipment under test is determined, and the time synchronization and punctuality performance of the distribution automation equipment is evaluated according to the current time error.

Preferably, the trigger event signal with time stamp is an analog switch opening and closing action signal, and the trigger event information is analog switch opening and closing action information.

Preferably, the time stamp event triggering module includes a signal source and a wave recording module connected in sequence;

According to the control command issued by the simulation test master station, the signal source simulates the current mutation of the distribution line or the sudden change of the phase electric field strength, sends the current mutation or the phase electric field intensity mutation signal to the distribution automation equipment, and triggers the distribution line fault indicator Start the wave recording function;

The wave recording module monitors and records the signal output by the signal source, generates a waveform file marking the wave recording start time parameter, and uploads it to the simulation test master station through the network interaction module.

Preferably, determining the current time error of the distribution automation equipment under test according to the reference time and the current time, and evaluating the timing and punctuality performance of the distribution automation equipment according to the current time error, including:

(1) Determine the time synchronization error Δt1=T0-T1 of the distribution automation equipment under test according to the difference between the reference time T0 and the current time T1, and judge whether the time synchronization error Δt1 is less than the first threshold, and if so, proceed to the next step. One-step test; otherwise, the time-synchronization function of the tested distribution automation equipment does not meet the time-synchronization requirements, and the test ends;

(2) The simulation test master station sends a control command with an invalid time to the distribution automation equipment under test, and determines the time synchronization error of the distribution automation equipment under test according to the difference between the reference time T0 and the current time T1 Δt2= T2-T3, judge whether the time synchronization error Δt2 is less than the first threshold, if so, proceed to the next test; otherwise, the time synchronization function of the tested distribution automation equipment does not meet the time synchronization requirements, and the test ends;

(3) Take the action start time in the trigger event information as the reference time T4, take the time when the distribution automation equipment uploads the time stamped event information as the current time T5 of the device, and determine the measured value according to the difference between the reference time T4 and the current time T5 Timing error of distribution automation equipment △t3=T4-T5;

(4) Disconnect the communication link between the simulation test master station and the distribution automation equipment, and maintain the punctuality time T required by the equipment standby operation standard;

Re-establish the network connection relationship between the distribution automation equipment and the simulation test master station, and determine the time synchronization error △t4=T6-T7 of the distribution automation equipment under test according to the difference between the reference time T6 and the current time T7;

According to the difference between the timing error Δt4 and the timing error Δt3, determine the timing error Δt=Δt4-Δt3, and judge whether the timing error Δt is less than the second threshold; if so, the distribution automation equipment to be tested meet the requirements; otherwise, the distribution automation equipment under test does not meet the punctuality requirements.

Preferably, the simulation test master station is bidirectionally connected to the distribution automation equipment through the RJ Ethernet interface or the RS232 serial port.

Preferably, the standard clock module and the network interaction module follow the SNTP protocol; the simulation test master station and the network interaction module follow the TCP protocol, the IP protocol and the IEC60870-5-104 protocol; the distribution automation equipment Comply with the TCP protocol, IP protocol, SNTP protocol and IEC60870-5-104 protocol with the network interaction module.

Compared with the closest prior art, the technical solution provided by the present invention has the following beneficial effects:

The invention provides a time synchronization and punctuality test system and method for distribution automation equipment. The system includes: a standard clock module, a network interaction module, an analog test master station, a time stamp event trigger module and distribution automation equipment; the The network interaction module is respectively connected with the simulation test master station, the time stamping event trigger module and the distribution automation equipment in two directions; the network interaction module is connected with the standard clock module in one direction; the simulation test master station is connected with the distribution automation equipment Two-way connection of equipment; the standard clock module is used to send GPS/Beidou system timing signals to the network interaction module, and realize SNTP time synchronization of power distribution automation equipment; the network interaction module is used to receive GPS/Beidou system The timing signal is used for its own time calibration and is used as the standard clock time of the entire test system; a local area network is built to provide a communication interface for the access equipment; the time stamp event trigger module is used to simulate the control command issued by the test master, Send the trigger event signal with time stamp to the distribution automation equipment, and upload the trigger event information to the simulation test master station through the network interaction module; the simulation test master station is used to issue control commands to the time stamp event trigger module; Receive the trigger event information uploaded by the time stamp event trigger module, take the action start time in the trigger event information as the reference time, receive the time stamp message information uploaded by the distribution automation equipment under test, and extract the current information of the distribution automation equipment. time, determine the current time error of the distribution automation equipment under test according to the reference time and the current time, and evaluate the time synchronization and punctuality performance of the distribution automation equipment according to the current time error.

The time synchronization and punctuality testing system and method for distribution automation equipment provided by the invention meet the time synchronization function and punctuality performance test requirements of multiple distribution automation equipment, and realize the main function of distribution automation terminal or distribution line fault indicator. There are multiple ways of station time synchronization and SNTP time synchronization to realize interference time synchronization and punctuality performance test; the selection of reference time in the test process is more scientific and accurate, which can effectively eliminate the distribution automation equipment and distribution based on wireless communication methods. The external environment interference in the communication process between the power master stations improves the correctness of the test results.

Description of drawings

Fig. 1 is the structural representation of a kind of power distribution automation equipment timing and punctuality test system of the present invention;

FIG. 2 is a test flow chart of a time synchronization and punctuality test method of a power distribution automation equipment according to the present invention.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A timing and punctuality test system for power distribution automation equipment provided by the present invention, as shown in Figure 1, includes:

Standard clock module, network interaction module, analog test master station, time stamping event trigger module and distribution automation equipment;

The network interaction module is respectively bidirectionally connected with the simulation test master station, the time stamp event trigger module and the distribution automation equipment;

The network interaction module is unidirectionally connected to the standard clock module;

The simulation test master station is bidirectionally connected with the distribution automation equipment;

The standard clock module is used to send GPS/Beidou system timing signals to the network interaction module, and realize SNTP time synchronization of power distribution automation equipment;

The network interaction module is used to receive the GPS/Beidou system timing signal to calibrate its own time, and use it as the standard clock time of the entire test system; build a local area network to provide a communication interface for the access device;

The time stamp event trigger module is used to send a trigger event signal with a time stamp to the distribution automation equipment according to the control command issued by the simulation test master station, and upload the trigger event information to the simulation test master station through the network interaction module ;

The simulated test master station is used to issue control commands to the time stamp event triggering module; receive the trigger event information uploaded by the time stamp event trigger module, use the action start time in the trigger event information as a reference time, and receive the test event information. The time-stamped message information uploaded by the distribution automation equipment, extract the current time of the distribution automation equipment, determine the current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluate according to the current time error Timing and punctuality performance of distribution automation equipment.

When the trigger event signal with time stamp is an analog switch opening and closing action signal, the trigger event information is analog switch opening and closing action information.

When the time stamp event trigger module is the signal source and the wave recorder module connected in sequence:

The signal source is used to simulate the current mutation or phase electric field intensity mutation operation scenario of the distribution line according to the control command issued by the simulation test master station, send the current mutation or phase electric field intensity mutation signal to the distribution automation equipment, and trigger the distribution line. The electric line fault indicator starts the wave recording function;

The wave recording module is used for monitoring and recording the signal output by the signal source, generating a waveform file marking the wave recording start time parameter, and uploading it to the simulation test master station through the network interaction module.

Determining the current time error of the distribution automation equipment under test according to the reference time and the current time, and evaluating the timing and punctuality performance of the distribution automation equipment according to the current time error, including:

(1) Determine the time synchronization error Δt1=T0-T1 of the distribution automation equipment under test according to the difference between the reference time T0 and the current time T1, and judge whether the time synchronization error Δt1 is less than the first threshold, and if so, proceed to the next step. One-step test; otherwise, the time-synchronization function of the tested distribution automation equipment does not meet the time-synchronization requirements, and the test ends;

(2) Send a control command with an invalid time to the distribution automation equipment under test, and determine the time synchronization error Δt2=T2-T3 of the distribution automation equipment under test according to the difference between the reference time T0 and the current time T1, Determine whether the time synchronization error Δt2 is less than the first threshold, if so, proceed to the next test; otherwise, the time synchronization function of the tested distribution automation equipment does not meet the time synchronization requirements, and the test ends;

(3) Take the action start time in the trigger event information as the reference time T4, take the time when the distribution automation equipment uploads the time stamped event information as the current time T5 of the device, and determine the measured value according to the difference between the reference time T4 and the current time T5 Timing error of distribution automation equipment △t3=T4-T5;

(4) Disconnect the communication link with the distribution automation equipment, and maintain the punctuality time T required by the equipment standby operation standard;

Re-establish the network connection relationship with the distribution automation equipment, and determine the time synchronization error Δt4=T6-T7 of the distribution automation equipment under test according to the difference between the reference time T6 and the current time T7;

According to the difference between the timing error Δt4 and the timing error Δt3, determine the punctual error time Δt=Δt4-Δt3, and judge whether the punctual error time Δt is less than the second threshold; if so, the distribution under test The automation equipment meets the requirements; otherwise, the distribution automation equipment under test does not meet the punctuality requirements.

The two-way connection between the simulation test master station and the distribution automation equipment includes:

The simulation test master station is bidirectionally connected with the distribution automation equipment through the RJ Ethernet interface or the RS232 serial port.

The standard clock module and the network interaction module follow the SNTP protocol; the simulation test master station and the network interaction module follow the TCP protocol, the IP protocol and the IEC60870-5-104 protocol; the power distribution automation equipment interacts with the network The modules follow the TCP protocol, IP protocol, SNTP protocol and IEC60870-5-104 protocol.

A timing and punctuality test method for power distribution automation equipment, the test method flow is shown in Figure 2, and the method includes:

The standard clock module sends the GPS/Beidou system timing signal to the network interaction module, and realizes the SNTP time synchronization of the distribution automation equipment;

The network interaction module receives the GPS/Beidou system timing signal to calibrate its own time and use it as the standard clock time of the entire test system;

Simulate the test master station to issue control commands to the time stamp event trigger module;

The time stamp event triggering module sends a trigger event signal with time stamp to the distribution automation equipment according to the control command issued by the simulation test master station, and uploads the trigger event information to the simulation test master station through the network interaction module;

The simulation test master station receives the trigger event information uploaded by the time stamp event trigger module, takes the action start time in the trigger event information as the reference time, receives the time stamp message information uploaded by the distribution automation equipment under test, and extracts the power distribution The current time of the automation equipment is determined according to the reference time and the current time, and the current time error of the distribution automation equipment under test is determined, and the time synchronization and punctuality performance of the distribution automation equipment is evaluated according to the current time error.

When the trigger event signal with time stamp is an analog switch opening and closing action signal, the trigger event information is analog switch opening and closing action information.

When the time stamp event trigger module is the signal source and the wave recorder module connected in sequence:

According to the control command issued by the simulation test master station, the signal source simulates the current mutation of the distribution line or the sudden change of the phase electric field strength, sends the current mutation or the phase electric field intensity mutation signal to the distribution automation equipment, and triggers the distribution line fault indicator Start the wave recording function;

The wave recording module monitors and records the signal output by the signal source, generates a waveform file marking the wave recording start time parameter, and uploads it to the simulation test master station through the network interaction module.

Determining the current time error of the distribution automation equipment under test according to the reference time and the current time, and evaluating the timing and punctuality performance of the distribution automation equipment according to the current time error, including:

(1) Determine the time synchronization error Δt1=T0-T1 of the distribution automation equipment under test according to the difference between the reference time T0 and the current time T1, and judge whether the time synchronization error Δt1 is less than the first threshold, and if so, proceed to the next step. One-step test; otherwise, the time-synchronization function of the tested distribution automation equipment does not meet the time-synchronization requirements, and the test ends;

(2) Interference time synchronization: The simulation test master station sends a control command with an invalid time to the distribution automation equipment under test, and determines the time synchronization of the distribution automation equipment under test according to the difference between the reference time T0 and the current time T1 Error Δt2=T2-T3, judge whether the time synchronization error Δt2 is less than the first threshold, if so, proceed to the next test; otherwise, the test is over if the time synchronization function of the distribution automation equipment under test does not meet the time synchronization requirements;

(3) Ensure that the equipment is successfully time-synchronized before the punctuality performance test of the distribution automation equipment: take the action start time in the trigger event information as the reference time T4, and take the time when the distribution automation equipment uploads the time-stamped event information as the current time of the equipment T5, according to the difference between the reference time T4 and the current time T5, determine the time synchronization error Δt3=T4-T5 of the distribution automation equipment under test;

(4) Disconnect the communication link between the simulation test master station and the distribution automation equipment, and maintain the punctuality time T required by the equipment standby operation standard;

Re-establish the network connection relationship between the distribution automation equipment and the simulation test master station, and determine the time synchronization error △t4=T6-T7 of the distribution automation equipment under test according to the difference between the reference time T6 and the current time T7;

According to the difference between the timing error Δt4 and the timing error Δt3, determine the timing error Δt=Δt4-Δt3, and judge whether the timing error Δt is less than the second threshold; if so, the distribution automation equipment to be tested meet the requirements; otherwise, the distribution automation equipment under test does not meet the punctuality requirements.

The simulation test master station is bidirectionally connected with the distribution automation equipment through the RJ Ethernet interface or the RS232 serial port.

The standard clock module and the network interaction module follow the SNTP protocol; the simulation test master station and the network interaction module follow the TCP protocol, the IP protocol and the IEC60870-5-104 protocol; the power distribution automation equipment interacts with the network The modules follow the TCP protocol, IP protocol, SNTP protocol and IEC60870-5-104 protocol.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications or equivalent replacements are made to the specific embodiments of the present invention, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A power distribution automation equipment timing and punctuality test system, is characterized in that, described system comprises: Standard clock module, network interaction module, analog test master station, time stamping event trigger module and distribution automation equipment; The network interaction module is respectively bidirectionally connected with the simulation test master station, the time stamp event trigger module and the distribution automation equipment; The network interaction module is unidirectionally connected to the standard clock module; The simulation test master station is bidirectionally connected with the distribution automation equipment; The standard clock module is used to send GPS/Beidou system timing signals to the network interaction module, and realize SNTP time synchronization of power distribution automation equipment; The network interaction module is used to receive the GPS/Beidou system timing signal to calibrate its own time, and use it as the standard clock time of the entire test system; it is also used to build a local area network and provide a communication interface for the access device; The time stamp event trigger module is used to send a trigger event signal with a time stamp to the distribution automation equipment according to the control command issued by the simulation test master station, and upload the trigger event information to the simulation test master station through the network interaction module ; The simulated test master station is used to issue control commands to the time stamp event triggering module; receive the trigger event information uploaded by the time stamp event trigger module, use the action start time in the trigger event information as a reference time, and receive the test event information. The time-stamped message information uploaded by the distribution automation equipment, extract the current time of the distribution automation equipment, determine the current time error of the tested distribution automation equipment according to the reference time and the current time, and evaluate according to the current time error Timing and punctuality performance of distribution automation equipment; The time stamp event triggering module includes a signal source and a wave recording module connected in sequence; The signal source is used to simulate the current mutation or phase electric field intensity mutation operation scenario of the distribution line according to the control command issued by the simulation test master station, send the current mutation or phase electric field intensity mutation signal to the distribution automation equipment, and trigger the distribution line. The electric line fault indicator starts the wave recording function; The wave recording module is used for monitoring and recording the signal output by the signal source, generating a waveform file marking the wave recording start time parameter, and uploading it to the simulation test master station through the network interaction module. 2 . The system according to claim 1 , wherein the trigger event signal with time stamp is an analog switch opening and closing action signal, and the trigger event information is analog switch opening and closing action information. 3 . 3. The system according to claim 1, wherein the current time error of the tested distribution automation equipment is determined according to the reference time and the current time, and the time synchronization of the distribution automation equipment is evaluated according to the current time error and punctual performance including: (1) According to the difference between the reference time T0 and the current time T1, determine the time synchronization error △t1=T0-T1 of the distribution automation equipment under test, and judge whether the time synchronization error △t1 is less than the first threshold, and if so, proceed to the next step. One-step test; otherwise, the time-synchronization function of the tested distribution automation equipment does not meet the time-synchronization requirements, and the test ends; (2) Send a control command with an invalid time to the distribution automation equipment under test, and determine the time synchronization error of the distribution automation equipment under test according to the difference between the trigger time T2 and the current time T3 of the equipment under test △t2=T2－T3 , judge whether the time synchronization error Δt2 is less than the first threshold, if so, proceed to the next test; otherwise, the time synchronization function of the tested distribution automation equipment does not meet the time synchronization requirements, and the test ends; (3) Take the action start time in the trigger event information as the reference time T4, take the time when the distribution automation equipment uploads the time stamped event information as the current time T5 of the device, and determine the measured value according to the difference between the reference time T4 and the current time T5. Timing error of distribution automation equipment △t3=T4－T5; (4) Disconnect the communication link with the distribution automation equipment and maintain the punctuality time T required by the equipment standby operation standard; Re-establish the network connection relationship with the distribution automation equipment, and determine the time synchronization error △t4=T6-T7 of the distribution automation equipment under test according to the difference between the reference time T6 and the current time T7; Determine the punctuality error time △t=△t4-△t3 according to the difference between the time synchronization error △t4 and the time synchronization error △t3, and judge whether the punctuality error time △t is less than the second threshold; The automation equipment meets the requirements; otherwise, the distribution automation equipment under test does not meet the punctuality requirements. 4. The system according to claim 1, wherein the two-way connection between the simulated test master station and the power distribution automation equipment comprises: The simulation test master station is bidirectionally connected with the distribution automation equipment through the RJ Ethernet interface or the RS232 serial port. 5. system as claimed in claim 1 is characterized in that, follows SNTP agreement between described standard clock module and network interaction module; Between described simulation test master station and network interaction module, follows TCP protocol, IP protocol and IEC60870- 5-104 protocol; the distribution automation equipment and the network interaction module follow the TCP protocol, the IP protocol, the SNTP protocol and the IEC60870-5-104 protocol. 6. A method for testing timing and punctuality of power distribution automation equipment, wherein the method comprises: The standard clock module sends GPS/Beidou system timing signals to the network interaction module, and realizes SNTP time synchronization of power distribution automation equipment; The network interaction module receives the GPS/Beidou system timing signal to calibrate its own time and use it as the standard clock time of the entire test system; Simulate the test master station to issue control commands to the time stamp event trigger module; The time stamp event triggering module sends a trigger event signal with time stamp to the distribution automation equipment according to the control command issued by the simulation test master station, and uploads the trigger event information to the simulation test master station through the network interaction module; The simulation test master station receives the trigger event information uploaded by the time stamp event trigger module, takes the action start time in the trigger event information as the reference time, receives the time stamp message information uploaded by the distribution automation equipment under test, and extracts the power distribution the current time of the automation equipment, determine the current time error of the distribution automation equipment under test according to the reference time and the current time, and evaluate the time synchronization and punctuality performance of the distribution automation equipment according to the current time error; The time stamp event triggering module includes a signal source and a wave recording module connected in sequence; According to the control command issued by the simulation test master station, the signal source simulates the current mutation of the distribution line or the sudden change of the phase electric field strength, sends the current mutation or the phase electric field intensity mutation signal to the distribution automation equipment, and triggers the distribution line fault indicator Start the wave recording function; The wave recording module monitors and records the signal output by the signal source, generates a waveform file marking the wave recording start time parameter, and uploads it to the simulation test master station through the network interaction module. 7 . The method of claim 6 , wherein the trigger event signal with time stamp is an analog switch opening and closing action signal, and the trigger event information is analog switch opening and closing action information. 8 . 8. The method according to claim 6, wherein the current time error of the distribution automation equipment under test is determined according to the reference time and the current time, and the time synchronization of the distribution automation equipment is evaluated according to the current time error with punctual performance including: (1) According to the difference between the reference time T0 and the current time T1, determine the time synchronization error △t1=T0-T1 of the distribution automation equipment under test, and judge whether the time synchronization error △t1 is less than the first threshold, and if so, proceed to the next step. One-step test; otherwise, the time-synchronization function of the tested distribution automation equipment does not meet the time-synchronization requirements, and the test ends; (2) The simulation test master station sends a control command with an invalid time to the distribution automation equipment under test, and determines the time synchronization error △t2 of the distribution automation equipment under test according to the difference between the trigger time T2 and the current time T3 of the equipment =T2－T3, judge whether the time synchronization error Δt2 is less than the first threshold, if so, proceed to the next test; otherwise, the time synchronization function of the tested distribution automation equipment does not meet the time synchronization requirements, and the test ends; (3) Take the action start time in the trigger event information as the reference time T4, take the time when the distribution automation equipment uploads the time stamped event information as the current time T5 of the device, and determine the measured value according to the difference between the reference time T4 and the current time T5. Timing error of distribution automation equipment △t3=T4－T5; (4) Disconnect the communication link between the simulation test master station and the distribution automation equipment, and maintain the punctuality time T required by the equipment standby operation standard; Re-establish the network connection relationship between the distribution automation equipment and the simulation test master station, and determine the time synchronization error of the distribution automation equipment under test according to the difference between the reference time T6 and the current time T7 △t4=T6-T7; According to the difference between the timing error Δt4 and the timing error Δt3, determine the timing error Δt=Δt4-Δt3, and judge whether the timing error Δt is less than the second threshold; if so, then the distribution automation equipment to be tested meet the requirements; otherwise, the distribution automation equipment under test does not meet the punctuality requirements. 9 . The method of claim 6 , wherein the simulation test master station is bidirectionally connected to the power distribution automation equipment through an RJ Ethernet network interface or an RS232 serial port. 10 . 10. The method according to claim 6, wherein the standard clock module and the network interaction module follow the SNTP protocol; the simulation test master station and the network interaction module follow the TCP protocol, the IP protocol and the IEC60870- 5-104 protocol; the distribution automation equipment and the network interaction module follow the TCP protocol, the IP protocol, the SNTP protocol and the IEC60870-5-104 protocol.

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