CN115407192A

CN115407192A - Circuit breaker testing method, device, equipment and readable storage medium

Info

Publication number: CN115407192A
Application number: CN202211144344.0A
Authority: CN
Inventors: 林雪华; 陈德扬; 卢远宏; 李书勇; 黄立滨; 陈钦磊; 刘志江; 廖梦君
Original assignee: China South Power Grid International Co ltd
Current assignee: China South Power Grid International Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2022-11-29

Abstract

The application provides a circuit breaker testing method, a device, equipment and a readable storage medium, the application can utilize a preset automatic program to generate a first target signal set, all switch states of an alternating current field of a high-voltage direct-current transmission system can be efficiently combined, corresponding signals are generated, testing and comparison verification are carried out according to the signals corresponding to all the switch combination states, the final circuit breaker protection function of a converter of the high-voltage direct-current transmission system can be effectively realized according to the state combination of all switches of the alternating current field of the high-voltage direct-current transmission system, and complete logic testing is carried out.

Description

Circuit breaker testing method, device, equipment and readable storage medium

Technical Field

The present disclosure relates to the field of electrical equipment testing technologies, and in particular, to a method, an apparatus, a device and a readable storage medium for testing a circuit breaker.

Background

The high-voltage direct-current transmission system is an important transmission system for long-distance transmission of large-capacity electric energy and plays an important role in safe and stable operation of a power grid. The converter stations of a hvdc transmission system are typically connected to an ac line via an ac field for the transmission of electric energy. In the actual operation process, after a certain breaker is separated, a certain converter in a converter station of the high-voltage direct-current transmission system may lose the connection with the alternating-current system, and such a breaker is also referred to as a final breaker of the converter in the converter station of the high-voltage direct-current transmission system. The last breaker of a converter station of a high voltage direct current transmission system is opened, which may cause the equipment of the high voltage direct current transmission system to have risks such as electric energy transmission failure, even equipment damage caused by excessive voltage bearing, and the like, and therefore, the converter in the high voltage direct current transmission system needs to be configured with a corresponding last breaker protection function. Therefore, by comprehensively judging the on-off state of all switches in the alternating current field, when the last circuit breaker is separated, a command of locking the converter can be sent out to stop the direct current converter, so that the overvoltage damage of equipment of the high-voltage direct current transmission system is avoided.

It can be known from the above description that in practical applications, a corresponding final breaker protection function needs to be configured for a converter in a high voltage direct current transmission system, and therefore, how to test the final breaker protection function of the converter in the high voltage direct current transmission system is of great significance for protecting high voltage direct current transmission system equipment. However, if the last breaker protection function of the converter in the hvdc transmission system is not found in advance, it may cause malfunction or failure in the actual application process of the last breaker protection function of the converter in the hvdc transmission system, which may affect the normal operation of the hvdc transmission system or may not play the role of the protection device correctly. In this regard, a complete logic test of the last circuit breaker protection function of the converter in the high voltage direct current transmission system is required to ensure the correctness of the last circuit breaker protection function of the converter in the high voltage direct current transmission system.

In the practical application process, as an alternating current field of a high-voltage direct current project often contains dozens or twenty switches, the number of state combinations of the switches is large, which brings great difficulty and challenge to complete logic test of the protection function of the final breaker of a converter in the high-voltage direct current transmission system. In the past, the correctness of the action of the protection function of the last circuit breaker is usually verified under a typical combination working condition in a direct current project, but the action response condition under all switch combinations cannot be used for carrying out complete logic test on the protection function of the last circuit breaker of a current converter in a high-voltage direct current transmission system.

Disclosure of Invention

In view of the above, the present application provides a method, an apparatus, a device, and a readable storage medium for testing a circuit breaker, which are used to solve the technical defect of performing a complete logic test on the final circuit breaker protection function of a current converter in a high voltage dc transmission system under all switch combinations in the prior art.

A circuit breaker testing method, comprising:

generating a first target signal set by using a preset automation program, wherein the first target signal set comprises at least one first target signal, and the first target signal is a switching state combined signal of an alternating current field to be tested;

inputting each first target signal into a last circuit breaker protection device to be tested in a preset test environment to test to obtain a first target test result of each first target signal;

judging whether each first target test result meets a preset test requirement or not, wherein the preset test requirement meets the requirement of the last breaker protection function of a current converter of the high-voltage direct-current transmission system;

if the first target test result meeting the preset test requirement exists, recording and storing a first target signal corresponding to the first target test result meeting the preset test requirement;

taking a first target signal corresponding to the target test result meeting the preset test requirement as a second target signal, and inputting the second target signal into a preset calculation program in the same test sequence for verification to obtain a second target test result of each second target signal;

judging whether the second target test results are completely consistent with first target test results of first target signals corresponding to second target signals corresponding to the second target test results;

and if so, determining that the logic design of the last circuit breaker device to be tested is correct.

Preferably, the preset automatic program setting process includes:

acquiring the total number of switches of an alternating current field to be tested and the serial number of each switch;

setting a first target array according to the total number of switches of an alternating current field to be tested, wherein the total number of bits of the first target array is the total number of switches of the alternating current field to be tested, and each bit of the first target data represents the closed state of one switch of the alternating current field;

setting an initial value of each bit of the first target array to 0;

and adjusting each bit of the first target array from 0 to a preset threshold value successively according to the numbering sequence of each switch according to a preset time interval to obtain a second target array set, wherein the second target data set comprises a plurality of different second target arrays, and one second target array represents one group of switch state combinations.

Preferably, the generating a first target signal set by using a preset automation program comprises:

constructing different target switch state combinations according to the second target arrays to obtain a switch state combination set of the alternating-current field, wherein the switch state combination set of the alternating-current field comprises a plurality of different target switch state combinations;

and constructing a corresponding first target signal by combining the states of each target switch, and taking a set formed by the first target signals as the first target signal set.

Preferably, the method further comprises:

if the second target test result is not completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result, determining that the logic design of the last circuit breaker device to be tested has a defect;

comparing the difference information between each second target test result and a first target test result of a first target signal corresponding to a second target signal corresponding to each second target test result;

readjusting the logic design of the last circuit breaker device to be tested according to the difference information.

Preferably, the preset test requirements include:

and the switch state combination corresponding to the first target test result meets the switch state combination corresponding to the final breaker protection function of the converter of the high-voltage direct-current transmission system.

Preferably, the preset time interval is set according to the total number of switches of the alternating current field to be tested and the test time requirement.

Preferably, the preset threshold is 1, and when the preset threshold is 1, the state of the switch corresponding to the bit with the value of 1 in the first target array is characterized as a closed state.

A circuit breaker testing apparatus comprising:

the signal generating unit is used for generating a first target signal set by using a preset automation program, wherein the first target signal set comprises at least one first target signal, and the first target signal is a switching state combined signal of an alternating current field to be tested;

the test unit is used for inputting each first target signal into a last circuit breaker protection device to be tested in a preset test environment to be tested, and obtaining a first target test result of each first target signal;

the first judging unit is used for judging whether each first target test result meets a preset test requirement, wherein the preset test requirement meets the requirement of the last circuit breaker protection function of the current converter of the high-voltage direct-current transmission system;

the recording unit is used for recording and storing a first target signal corresponding to the first target test result meeting the preset test requirement when the execution result of the first judging unit is that the first target test result meeting the preset test requirement is determined to exist;

the verification unit is used for inputting a first target signal corresponding to the target test result meeting the preset test requirement as a second target signal into a preset calculation program in the same test sequence for verification to obtain a second target test result of each second target signal;

a second judging unit, configured to judge whether each of the second target test results is completely consistent with a first target test result of a first target signal corresponding to a second target signal corresponding to each of the second target test results;

and the first determination unit is used for determining that the logic design of the last circuit breaker device to be tested is correct when the execution result of the second judgment unit is yes.

A circuit breaker testing apparatus comprising: one or more processors, and a memory;

the memory has stored therein computer readable instructions which, when executed by the one or more processors, carry out the steps of the circuit breaker testing method as claimed in any one of the preceding introductions.

A readable storage medium having stored therein computer readable instructions, which, when executed by one or more processors, cause the one or more processors to carry out the steps of the circuit breaker testing method as described in any of the preceding introductions.

As can be seen from the above-described technical solutions, when it is required to test whether the logic design of the last circuit breaker of the converter of the high-voltage direct-current transmission system can implement the protection function of the last circuit breaker, the method provided in the embodiment of the present application may generate a first target signal set by using a preset automation program, where the first target signal set includes at least one first target signal, and the first target signal may be a switching-state combination signal of an ac field to be tested; after each first target signal is obtained, each first target signal may be input to a last circuit breaker protection device to be tested in a preset test environment to be tested, so that a first target test result of each first target signal may be obtained; after each first target test result is obtained, whether each first target test result meets a preset test requirement or not can be further judged, wherein the preset test requirement meets the requirement of the last breaker protection function of the converter of the high-voltage direct-current transmission system; if the first target test result meeting the preset test requirement is determined to exist, recording and storing a first target signal corresponding to the first target test result meeting the preset test requirement; so that it can be used for verification and comparison tests. Taking a first target signal corresponding to the target test result meeting the preset test requirement as a second target signal, and inputting the second target signal into a preset calculation program in the same test sequence for verification to obtain a second target test result of each second target signal; after obtaining each second target test result, it may be determined whether each second target test result is completely consistent with a first target test result of a first target signal corresponding to a second target signal corresponding to each second target test result; if each second target test result is completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result, it may be determined that the logic design of the last circuit breaker device to be tested is correct.

The method provided by the embodiment of the application can realize that all switch states of an alternating current field of a high-voltage direct-current transmission system can be efficiently combined, and generates corresponding signals, so that complete logic test on the protection function of the final breaker of a converter of the high-voltage direct-current transmission system can be effectively realized according to the combined states of all switches of the alternating current field of the high-voltage direct-current transmission system.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a flowchart illustrating a method for testing a circuit breaker according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a typical ac field connection of a converter station of a hvdc transmission system according to an example of the present application;

FIG. 3 is a diagram illustrating the effect of different switch combination status signals according to an exemplary embodiment of the present application;

fig. 4 is a flowchart illustrating an exemplary decision logic for a last circuit breaker of a converter of a hvdc transmission system according to an exemplary embodiment of the present disclosure;

fig. 5 is a schematic diagram illustrating an effect of connecting an ac field switch to an I bus of an hvdc transmission system according to an example of the present application;

fig. 6 is a schematic diagram illustrating the effect of connecting the II bus to the ac field switch of the hvdc transmission system according to the example of the present application;

fig. 7 is a schematic structural diagram of a circuit breaker testing device according to an example of the present application;

fig. 8 is a block diagram of a hardware structure of a circuit breaker testing apparatus according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Finally, the alternating current side of the converter station electrified converter of the circuit breaker protection finger is connected with an alternating current line through a circuit breaker and is connected with an external alternating current power grid to transmit power; when a certain breaker is disconnected, the AC side of the converter is disconnected, the breaker is the last breaker of the converter, and the converter is locked through the protection function of the last breaker.

The alternating current field refers to a combination of a series of equipment formed by connecting a high-voltage direct current converter station with an alternating current bus through a plurality of circuit breakers, wherein the equipment comprises double buses, an alternating current switch string with two-thirds of connection wires and a connected sending alternating current line, and the combination is called as the alternating current field of the high-voltage direct current converter station. Each string of the alternating current switches can comprise three circuit breakers and matched disconnecting links and grounding switches thereof.

The test of the protection function of the final breaker of the converter of the direct current transmission system is of great significance for protecting direct current transmission system equipment. However, if the defects existing in the design of the protection function of the last circuit breaker of the converter of the direct current transmission system cannot be found in advance, the protection function of the last circuit breaker of the converter of the direct current transmission system is subjected to misoperation or rejection, and the misoperation or rejection of the circuit breaker may affect the normal operation of direct current or fail to play the role of protecting equipment correctly.

In contrast, a complete logic test needs to be performed on the protection function of the final circuit breaker to ensure the correctness of the function. However, an alternating current field of the high-voltage direct current engineering often comprises dozens or twenty switches, the state combination of the switches is up to a dozen or twenty powers of 2, and the state combination of the switches is up to hundreds of millions, so that great difficulty and challenge are brought to the complete test of the protection function of the final circuit breaker.

In view of the fact that most of current circuit breaker testing schemes are difficult to adapt to complex and changeable business requirements, the applicant researches a circuit breaker testing scheme, the testing method can efficiently combine all switch states of an alternating current field of a high-voltage direct-current transmission system and generate corresponding signals, so that complete logic testing of the protection function of a final circuit breaker of a high-voltage direct-current transmission system converter can be effectively achieved according to the combined states of all switches of the alternating current field of the high-voltage direct-current transmission system.

The methods provided by the embodiments of the present application are operational with numerous general purpose or special purpose computing device environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multi-processor apparatus, distributed computing environments that include any of the above devices or equipment, and the like.

The embodiment of the application provides a method for testing a circuit breaker, which can be applied to various power transmission systems and can also be applied to various computer terminals or intelligent terminals, and the execution main body of the method can be a processor or a server of the computer terminal or the intelligent terminal.

The following describes a flow of a circuit breaker testing method according to an embodiment of the present application, with reference to fig. 1, as shown in fig. 1,

the process may include the following steps:

step S101, generating a first target signal set by using a preset automation program, wherein the first target signal set comprises at least one first target signal, and the first target signal is a switching state combined signal of an alternating current field to be tested.

Specifically, as can be seen from the above description, an ac field in a high-voltage dc power transmission system often includes tens or twenty switches, the state combinations of the switches are up to 2 to the tenth or twenty to the tenth, and the switch combinations are up to hundreds of millions, which brings great difficulty and challenge to the complete test of the protection function of the final circuit breaker.

In order to perform testing according to a combination of all switches of an ac field, the method provided by the embodiment of the present application may generate a first target signal set by using a preset automation program, where the first target signal set includes at least one first target signal, and the first target signal is a switch state combination signal of the ac field to be tested.

Step S102, inputting each first target signal into a last circuit breaker protection device to be tested in a preset test environment for testing, and obtaining a first target test result of each first target signal.

Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may generate the first target signal set by using a preset automation program.

The first target signal set comprises signals combined by all switches of the alternating current field, and all first target signals in the first target signal set are used for testing a final breaker protection device of a converter of the high-voltage direct-current transmission system, so that the final breaker protection function of the converter of the high-voltage direct-current transmission system can be completely tested under action response conditions of all switch combinations.

After obtaining each first target signal, each first target signal may be input to a last circuit breaker protection device to be tested in a preset test environment for testing, so that a first target test result of each first target signal may be obtained.

The preset test environment provided by the embodiment of the application can be set as a pre-established last circuit breaker protection function test platform.

The preset test environment is different from the previous hardware-in-loop test platform in that the previous control and protection hardware-in-loop platform is generally closed-loop control, and the preset test environment provided by the embodiment of the application can be set to be the pre-established final circuit breaker protection function test platform, and only the correctness of the output logic needs to be verified, so that the test environment provided by the embodiment of the application does not need to generate a switch on-off command of an actual control device and then send the switch on-off command back to the state of the control switch in the real-time simulator, and the wiring complexity of the test platform is reduced.

Step S103, judging whether each first target test result meets a preset test requirement, wherein the preset test requirement meets the requirement of the last breaker protection function of the current converter of the high-voltage direct-current transmission system.

Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may perform a test on a last breaker pack device to be tested, so that a first target test result of each first target signal may be obtained.

In an actual application process, in the switch combination states of the switches corresponding to all the first target signals, not all the switch states corresponding to the first target signals are the switch states for realizing the protection function of the last circuit breaker, nor is each switch a switch for realizing the protection function of the last circuit breaker.

Therefore, after obtaining the first target test result corresponding to each first target signal, each first target test result may be analyzed to determine whether there is the first target test result that meets the preset test requirement, and if there is the first target test result that meets the preset test requirement, it indicates that there is a switch state that meets the requirement that can implement the final breaker protection function, so that step S104 may be executed.

And step S104, recording and storing a first target signal corresponding to the first target test result meeting the preset test requirement.

Specifically, as can be seen from the above description, in the method provided in this embodiment, after first target test results corresponding to the first target signals are obtained, the first target test results may be analyzed, and whether the first target test results meeting the preset test requirement exist is determined.

If the first target test result meeting the preset test requirement exists, the switch state meeting the protection function of the final circuit breaker is indicated, and the first target signal corresponding to the first target test result meeting the preset test requirement can be further recorded and stored, so that the first target signal corresponding to the first target test result meeting the preset test requirement can be further subjected to a secondary verification test, and the accuracy of the test result is improved.

Step S105, using the first target signal corresponding to the target test result meeting the preset test requirement as a second target signal, and inputting the second target signal into a preset calculation program in the same test sequence for verification, so as to obtain a second target test result of each second target signal.

Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may determine whether the first target test result meeting the preset test requirement exists by analyzing each first target test result. And if the first target test result meeting the preset test requirement exists, indicating that the switch state meeting the protection function of the final circuit breaker exists.

Wherein the preset test requirements may be set as:

If it is determined whether the switch of the ac field to be tested satisfies the final breaker protection function design of the converter of the high-voltage dc transmission system only by the first target test result, there may be a deviation or an error, and in order to further verify the accuracy of the first target test result, a first target signal corresponding to the target test result satisfying the preset test requirement may be used as a second target signal, and the first target signal and the second target signal may be input into a preset calculation program in the same test sequence for verification, so as to obtain a second target test result of each second target signal.

And the second target test result is a test result of a signal corresponding to the switch state combination which can realize the final breaker protection function of the current converter of the high-voltage direct-current transmission system.

As can be seen from the above description, the second target signal is a signal selected from the first target signals and corresponding to a switching state combination that can implement a final breaker protection function of a converter of the high-voltage direct-current transmission system. In practical application, the switching state combinations of the alternating current field to be tested cannot all realize the final breaker protection function of the converter of the high-voltage direct-current transmission system. Thus, the number of second target signals is smaller than the number of first target signals compared to the first target signals.

Therefore, the accuracy of the second target test result is relatively good, and therefore, the second target test result can be used as a reference result of the accuracy.

Step S106, determining whether each second target test result is completely consistent with a first target test result of a first target signal corresponding to a second target signal corresponding to each second target test result.

Specifically, as can be seen from the above description, in the method provided in the embodiment of the present application, the first target signal corresponding to the target test result that meets the preset test requirement may be used as the second target signal, and the second target test result of each second target signal is obtained by inputting the first target signal and the second target signal into a preset calculation program in the same test sequence for verification. The second target signal is a signal which is selected from the first target signals and corresponds to a switch state combination which can realize a final breaker protection function of a current converter of the high-voltage direct-current transmission system.

Therefore, after the second target test results are obtained, whether the second target test results completely match the first target test results of the first target signals corresponding to the second target test results may be further determined by using the second target test results as a reference.

If each of the second target test results is completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each of the second target test results, it indicates that the accuracy of the first target test result is consistent with the second target test result, and thus it may indicate that the logic design of the last circuit breaker device to be tested is correct, and therefore, step S107 may be performed.

And S107, determining that the logic design of the last circuit breaker device to be tested is correct.

Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may determine the accuracy of the first target test result by analyzing whether the second target test result is completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result, and if the second target test result is completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result, it is indicated that the accuracy of the first target test result is consistent with the second target test result, so that it may be determined that the logic design of the last circuit breaker device to be tested is correct.

According to the technical scheme, all switch states of an alternating current field of the high-voltage direct-current transmission system can be efficiently combined, and corresponding signals are generated, so that complete logic testing of the protection function of the final circuit breaker of the current converter of the high-voltage direct-current transmission system can be effectively achieved according to the combined states of all switches of the alternating current field of the high-voltage direct-current transmission system.

As can be seen from the above description, the method provided in this embodiment of the present application may utilize a preset automation program to generate the first target signal set, and then a setting process of the preset automation program is described, where the setting process may include the following steps:

step S201, obtaining the total number of the switches of the AC field to be tested and the serial numbers of the switches.

Specifically, in an actual application process, the number of switches of an alternating current field is dozens or dozens, there may be many switch state combinations of the alternating current field, the number of switch state combinations of the alternating current field is related to the total number of switches of the alternating current field, a switch state combination signal to be tested may be set according to a switch state combination set of the alternating current field to be tested, the switch state combination set of the alternating current field to be tested may include a plurality of different target switch state combinations, and the switch state combination set of the alternating current field to be tested may be set according to the number of switches of the alternating current field of the hvdc power transmission system.

In order to obtain the switch state combination signals of the alternating current field as much as possible, the total number of the switches of the alternating current field to be tested can be obtained, so that the switch state combination signals of the alternating current field to be tested can be determined according to the total number of the switches of the alternating current field to be tested.

Step S202, a first target array is set according to the total number of switches of the alternating-current field to be tested, wherein the total number of bits of the first target array is the total number of switches of the alternating-current field to be tested, and each bit of the first target data represents the closing state of one switch of the alternating-current field.

In particular, it follows from the above description that the number of switching state combinations of an ac field is related to the total number of switches of the ac field, the switching state combination signals to be tested may be set according to a set of switching state combinations of the ac field to be tested, and the set of switching state combinations of the ac field to be tested may comprise a plurality of different target switching state combinations, and the set of switching state combinations of the ac field may be set according to the number of switches of the ac field of the hvdc transmission system.

Thus, after obtaining the total number of switches of the alternating current field, a first target array may be set with the total number of switches of the alternating current field to be tested, where a total number of bits of the first target array is the total number of switches of the alternating current field to be tested, and each bit of the first target data may represent a closed state of one switch of the alternating current field.

The closed state of the switch corresponding to each bit in the first target array can be controlled by setting the value of each bit in the first target array, so that all the combined states of the switches of the alternating current field to be tested can be obtained.

For example, the bits of the first target array may be set to the closed state one by one, which may ensure that the switch corresponding to any one bit of the first target array is set to the closed state each time, so that the closed state signal of each switch of the ac field to be tested may be tested.

In step S203, the initial value of each bit of the first target array is set to 0.

Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may set a first target array according to the total number of switches of the ac field to be tested, where the total number of bits of the first target array is the total number of switches of the ac field to be tested, and each bit of the first target data may represent a closed state of one switch of the ac field.

The initial value of each bit of the first target array may be set to 0 prior to starting the test. Setting the initial value of each bit of the first target array to 0 to represent that each switch state corresponding to each bit of the first target array is an off state. Setting the initial value of each bit of the first target array to 0 can facilitate the test of each switch of the alternating current field to be tested one by one.

Step S204, successively adjusting each bit of the first target array from 0 to a preset threshold value according to a number sequence of each switch, to obtain a second target array set, where the second target data set includes a plurality of different second target arrays, and one second target array represents one group of switch state combinations.

In particular, in practical applications, in order to facilitate maintenance and detection of the switches by maintenance personnel, each switch in the ac field is usually numbered at the beginning of design, so that each switch can be subjected to a check test or periodic maintenance in practical operation.

As can be seen from the above description, the method provided in the embodiment of the present application can obtain the number sequence of each switch of the ac field to be tested.

Therefore, after the sequence numbers of the switches of the ac field to be tested are obtained, the bits of the first target array may be adjusted from 0 to a preset threshold value in sequence according to the number sequence of the switches at preset time intervals, so as to obtain a second target array set, where the second target data set includes a plurality of different second target arrays, and one of the second target arrays represents one group of switch state combinations.

Wherein the preset time interval may be set with reference to the total number of switches of the ac field or a test time requirement.

If the total number of switches of the alternating-current field to be tested is large, the switch state combination is large or the requirement on the testing time is short, the preset time can be set to be within 10ms.

For example, the preset time interval may be set to 10ms.

The preset threshold value can be set according to actual application requirements, and the preset threshold value can represent that the state of a switch corresponding to a bit with the value being the preset threshold value in the first target array is a closed state.

For example, the preset threshold may be set to 1, and when the preset threshold is 1, the state of the switch corresponding to the bit with the value of 1 in the first target array may be characterized as a closed state.

It can be seen from the above-described technical solutions that, the method provided in the embodiment of the present application may create a preset automation program, so that a first target signal set may be generated by using the preset automation program, and may implement efficient combination of all switching states of an ac field of a high-voltage dc transmission system, and generate corresponding signals, so that a complete logic test may be effectively implemented on a final breaker protection function of a converter of the high-voltage dc transmission system according to the combined states of all switches of the ac field of the high-voltage dc transmission system.

As can be seen from the above description, the method provided in the embodiment of the present application may generate the first target signal set by using a preset automation program, and then describe the process, where the process may include the following steps:

step S301, constructing different target switch state combinations according to each second target array, to obtain a switch state combination set of the ac field, where the switch state combination set of the ac field includes a plurality of different target switch state combinations.

Specifically, as can be seen from the above description, according to the numbering sequence of each switch, the method provided in the embodiment of the present application may adjust each bit of the first target array from 0 to a preset threshold value successively according to a preset time interval, so as to obtain a second target array set, where the second target data set includes a plurality of different second target arrays, and one of the second target arrays represents one group of switch state combinations.

Therefore, after obtaining each second target array, different target switch-state combinations may be constructed according to each second target array, so as to obtain a switch-state combination set of the ac field, where the switch-state combination set of the ac field may include a plurality of different target switch-state combinations. Each second target array corresponds to a target switch state combination.

Step S302, constructing a corresponding first target signal according to each target switch state combination, and using a set formed by the first target signals as the first target signal set.

Specifically, as can be seen from the above description, according to the method provided in this embodiment, different target switch state combinations may be constructed according to each second target array, so as to obtain a target switch state combination corresponding to each switch of the alternating current field, where each target switch state combination may represent a switch state combination corresponding to a closing state of each switch of the alternating current field. After the combination states of the target switches are obtained, a corresponding first target signal can be constructed by combining the states of the target switches, and a set formed by the first target signals is used as the first target signal set.

According to the technical scheme, after the combined state of each target switch can be generated by using a preset automation program, a corresponding first target signal can be constructed by combining the states of each target switch, a set formed by each first target signal is used as the first target signal set, and complete logic test on the protection function of the final circuit breaker of the converter of the high-voltage direct-current power transmission system can be effectively realized according to the combined states of all switches of an alternating-current field of the high-voltage direct-current power transmission system.

As can be seen from the above description, the method provided in this embodiment of the present application may determine the accuracy of the first target test result by analyzing whether the first target test result of the first target signal corresponding to each second target test result and the second target signal corresponding to each second target test result are completely consistent, and if the first target test result of the first target signal corresponding to each second target test result and the second target signal corresponding to each second target test result is not completely consistent, it indicates that there may be an error between the accuracy of the first target test result and the second target test result, and the logic design of the last circuit breaker device to be tested may need to be readjusted, and then the process may include the following steps:

step S401, if each second target test result is not completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result, determining that there is a defect in the logic design of the last circuit breaker device to be tested.

Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may determine the accuracy of the first target test result by analyzing whether the second target test result is completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result, and if the second target test result is not completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result, it may be determined that the logic design of the last circuit breaker device to be tested has a defect, where the accuracy of the first target test result may have an error with the second target test result.

For example, if there is a inconsistency between the second target test result and the first target test result of the first target signal corresponding to the second target test result, which indicates that there may be an error between the accuracy of the first target test result and the second target test result, it may be determined that there is a defect in the logic design of the last circuit breaker device to be tested.

Step S402, comparing the second target test results with difference information between the first target test results of the first target signals corresponding to the second target test results.

Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may analyze whether each second target test result is completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result to determine the accuracy of the first target test result, and after determining that there is a inconsistency between one second target test result and the first target test result of the first target signal corresponding to the second target test result, compare difference information between each second target test result and the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result, so as to determine, according to the difference information, the number of the switch corresponding to the switch state combination having the error.

Step S403, readjusting the logic design of the last circuit breaker device to be tested according to the difference information.

Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may compare difference information between each second target test result and a first target test result of a first target signal corresponding to a second target signal corresponding to each second target test result, after the difference information is determined, a target signal corresponding to a switch state combination having an error may be determined according to the difference information, and a number of a switch having an error may be determined according to the target signal, so that a logic design of the last circuit breaker device to be tested may be readjusted according to the number of the switch having the error.

It can be seen from the above-mentioned technical solutions that, when each of the second target test results is not completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each of the second target test results, the method provided in the embodiment of the present application may compare difference information between each of the second target test results and the first target test result of the first target signal corresponding to the second target signal corresponding to each of the second target test results, determine the target signal corresponding to the switch state combination having the error according to the difference information, and determine the number of the switch having the error according to the target signal, so that the logic design of the last circuit breaker device to be tested may be readjusted according to the number of the switch having the error.

Next, referring to fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, a specific implementation of the final circuit breaker testing method provided in the embodiment of the present application will be described by taking a conventional ac field connection with a bipolar four-valve group, in which a high-voltage dc includes 9 series switch intervals as an example.

Fig. 2 illustrates a typical ac field wiring schematic of a converter station of a hvdc transmission system.

As shown in fig. 2: the bipolar four-valve-group conventional high-voltage direct-current converter adopts a high-voltage direct-current transmission technical route based on a thyristor device for power grid phase change, one converter station comprises two poles, and each pole comprises a symmetrical structure of two valve groups.

P1G1 and P1G2 in fig. 2 refer to the high valve group (group 1) and the low valve group (group 2) of the converter station pole 1, respectively; P2G1 and P2G2 refer to the high valve group (group 1) and the low valve group (group 2) of the converter station pole 2, respectively.

The ACFs 1 to ACF4 in fig. 2 refer to the 1 st to 4 th major groups of ac filters connected in parallel on the ac side of the converter station, respectively.

Line1 to Line4 in fig. 2 indicate 4 ac lines through which the converter station sends out electric energy.

The I bus bar and the II bus bar in FIG. 2 are two bus bars of a typical double bus bar structure;

the three breakers and the disconnecting link and the grounding disconnecting link included in the dotted rectangle frame in fig. 2 constitute an ac interval of two-thirds wiring, which is also called an ac string; fig. 2 totally includes 9 ac strings.

The switch numbering convention in fig. 2 is: referring to a certain dc engineering schedule number, the switch numbers in fig. 2 are unified as 50 head, the 3 rd number represents the number of the located string, wherein the string number may be 1 to 9, the 4 th number represents the switch position in the ac string, wherein 1 is the side switch close to the I bus, 2 is the middle switch, and 3 is the side switch close to the II bus.

For example, as indicated by the numeral 5081: and the 8 th string of alternating current interval is close to the side switch of the I bus.

Defining N as the total number of switches in the ac field, N =27, and 27 switches in total, the switch state is 2 in total in fig. 2 ²⁷ And (4) combining the components.

The hardware-in-the-loop test system is constructed by a real-time simulator, a digital output interface board card and a device with actual final circuit breaker control protection function as a test environment:

for example, the real-time simulator simulates 27 switches, disconnecting links, buses and other electrical devices in fig. 2, and the on-off state signals of the N switches are respectively sent to the switch state signal receiving board card of the last circuit breaker protection device through the optical fiber and digital interface board card, and finally sent to the last circuit breaker protection logic calculation unit for performing calculation to determine whether a circuit breaker satisfies the last circuit breaker state of the current converter.

Therein is provided withThe off-state combination change signal automation program is set to: setting an array of 27 bits with N =27, wherein the initial value of each bit is 0, setting the value of 1 bit changing every 10ms from 1 to 0 in the sequence from the lowest bit to the highest bit, and generating 2 through continuous circulation traversal ²⁷ Different switch state signals, wherein the time intervals may be set at different times.

Fig. 3 illustrates an exemplary graph of 27 switch state signals.

Initially each switch is in bits, for example the first box in fig. 3, the 27 numbers are all 0, and at certain intervals, for example at intervals of 10ms, the position of one switch changes: from decimals 0 to conjuncts 1, or from conjuncts 1 to decimals 0, for example, as shown in the 2 nd block, the 1 st switch goes from decimals to conjuncts; ultimately yielding a 27 th power switching state combination of 2.

After different switch state combination signals are obtained, the switch state combination signals which change in batches pass through the last circuit breaker protection function logic running in the device, the working condition which is judged as the last circuit breaker is sequentially output and calculated, the output result is marked as 1, and the input states corresponding to the working condition, including all data of state combinations of 27 switches, are automatically stored in a specific text.

The schematic flow chart of the converter final breaker criterion illustrated in fig. 4 is illustrated by taking as an example the final breaker decision logic for the pole 1 group 1 converter valves P1G1 of the switch numbered 5081 in fig. 2.

And developing a calculation program corresponding to the criterion on other program development platforms, inputting the switch combination signals output to the actual device into an externally developed principle calculation program according to the same input sequence, comparing the calculated switch combination working condition identified as the final breaker with the device output result, and checking the correctness of the program of the final breaker protection device. If the comparison result is consistent, the logic of the last circuit breaker protection function of the device is considered to be correct, and if the comparison result is inconsistent, the logic of the device needs to be modified and perfected again according to specific working conditions.

For example, in conjunction with the ac field shown in fig. 2, the logic for determining that the 8 th series-edge switch with a number of 5081 or the switch with a number of 5082 is the last breaker of the pole 1 group 1 (P1G 1) is as shown in fig. 4: mainly divide into utmost point 1 group 1 and connect at I and connect at II generating line two kinds of condition, specifically as follows:

the first judgment basis is as follows: for the case where the group 1 of poles 1 is connected to the I bus, as shown in fig. 5;

1) Judging that the two switches with the numbers of 5081 and 5082 are in the closed position, and simultaneously, no alternating current line is connected to the 6 th string, the 7 th string and the 9 th string and the I bus;

2) The on-off switch with the serial number of 5031 is in an on position, wherein a pole 1 group 1 is connected to the I bus; and meanwhile, judging that the II bus is not connected with an alternating current circuit, or judging that the 1 st to 5 th series of switches are not closed, wherein the 1 st to 5 th series of switches are not closed, and the 1 st to 5 th series of switches are not connected with the I bus and the II bus.

The second judgment criterion is as follows: for the case where the group 1 of poles 1 is connected to the bus bar II, as shown in fig. 6;

1) Judging that two switches with the numbers of 5081 and 5082 are in closed positions, and meanwhile, no alternating current line is connected to the 6 th string, the 7 th string, the 9 th string and the I bus;

2) Judging that the switches with the numbers of 5032 and 5033 are in on position, wherein the pole 1 group 1 is connected to the II bus; and simultaneously judging that the II bus is not connected with an alternating current circuit, and simultaneously, connecting any series of closed loops for the 1 st to 5 th series of switches, wherein any series of switches for the 1 st to 5 th series of switches are connected with the I bus and the II bus.

The following describes the circuit breaker testing apparatus provided in the embodiments of the present application, and the circuit breaker testing apparatus described below and the circuit breaker testing method described above may be referred to correspondingly.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a circuit breaker testing apparatus disclosed in the embodiment of the present application.

As shown in fig. 7, the circuit breaker testing apparatus may include:

the signal generating unit 101 is configured to generate a first target signal set by using a preset automation program, where the first target signal set includes at least one first target signal, and the first target signal is a switching-state combined signal of an ac field to be tested;

the testing unit 102 is configured to input each first target signal into a last circuit breaker protection device to be tested in a preset testing environment to perform testing, so as to obtain a first target testing result of each first target signal;

a first judging unit 103, configured to judge whether each of the first target test results meets a preset test requirement, where the preset test requirement meets a requirement of a final breaker protection function of an inverter of the high-voltage direct-current power transmission system;

a recording unit 104, configured to record and store a first target signal corresponding to the first target test result meeting the preset test requirement when the execution result of the first determining unit is that it is determined that the first target test result meeting the preset test requirement exists;

a verification unit 105, configured to input a first target signal corresponding to the target test result meeting the preset test requirement as a second target signal into a preset calculation program in the same test sequence for verification, so as to obtain a second target test result of each second target signal;

a second determining unit 106, configured to determine whether each of the second target test results completely matches a first target test result of a first target signal corresponding to a second target signal corresponding to each of the second target test results;

a first determining unit 107, configured to determine that a logic design of the last circuit breaker device to be tested is correct when an execution result of the second determining unit is yes.

According to the technical scheme, when it is required to test whether the logic design of the last breaker of the converter of the hvdc transmission system can implement the protection function of the last breaker, the apparatus provided in the embodiment of the present application may generate, by using the signal generating unit 101, a first target signal set by using a preset automation program, where the first target signal set includes at least one first target signal, and the first target signal may be a switching-state combined signal of an alternating current field to be tested; after obtaining each first target signal, the testing unit 102 may be utilized to input each first target signal into a last circuit breaker protection device to be tested in a preset testing environment for testing, so that a first target testing result of each first target signal may be obtained; after obtaining each first target test result, the first determining unit 103 may further be used to determine whether each first target test result meets a preset test requirement, where the preset test requirement meets a requirement of a final breaker protection function of a converter of the high-voltage dc transmission system; if it is determined that the first target test result meeting the preset test requirement exists, a first target signal corresponding to the first target test result meeting the preset test requirement may be recorded and stored by using the recording unit 104; so that it can be used for verification and comparison tests. A first target signal corresponding to the target test result meeting the preset test requirement is used as a second target signal, and after a plurality of second target signals are obtained, the first target signal and the second target signal can be input into a preset calculation program by using a verification unit 105 in the same test sequence for verification, so that a second target test result of each second target signal is obtained; after obtaining each second target test result, the second determining unit 106 may be used to determine whether each second target test result is completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result; if each second target test result is completely consistent with the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result, the first determining unit 107 may be used to determine that the logic design of the last circuit breaker device to be tested is correct.

The device provided by the embodiment of the application can realize that all switch states of an alternating current field of a high-voltage direct-current transmission system can be efficiently combined, and generates corresponding signals, so that complete logic test can be effectively carried out on the protection function of the final circuit breaker of a current converter of the high-voltage direct-current transmission system according to the combined states of all switches of the alternating current field of the high-voltage direct-current transmission system.

Further optionally, the setting process of the preset automation program in the signal generating unit 101 may include the following steps:

acquiring the total number of switches of an alternating current field to be tested and the number of each switch;

setting an initial value of each bit of the first target array to 0;

Based on this, the signal generation unit 101 may include:

a first constructing unit, configured to construct different target switch state combinations according to each second target array, to obtain a switch state combination set of an alternating current field, where the switch state combination set of the alternating current field includes multiple different target switch state combinations;

and the second construction unit is used for constructing a corresponding first target signal by combining each target switch state, and taking a set formed by the first target signals as the first target signal set.

Further optionally, the apparatus may further include:

a second determining unit, configured to determine that a logic design of the last circuit breaker device to be tested has a defect when an execution result of the second determining unit is that a first target test result of a first target signal corresponding to each second target test result and a second target signal corresponding to each second target test result is not completely consistent;

the comparison unit is used for comparing the difference information between each second target test result and the first target test result of the first target signal corresponding to the second target signal corresponding to each second target test result;

and the adjusting unit is used for readjusting the logic design of the last circuit breaker device to be tested according to the difference information.

Further optionally, the preset test requirement may include:

Further optionally, the preset time interval is set according to the total number of switches of the alternating current field to be tested and the test time requirement.

Further optionally, the preset threshold is 1, and when the preset threshold is 1, the state of the switch corresponding to the bit with the value of 1 in the first target array is characterized as a closed state.

The specific processing flow of each unit included in the circuit breaker testing apparatus may refer to the related description of the circuit breaker testing method, and is not described herein again.

The circuit breaker testing arrangement that this application embodiment provided can be applied to circuit breaker test equipment, like the terminal: mobile phones, computers, etc. Alternatively, fig. 8 shows a block diagram of a hardware structure of the circuit breaker testing device, and referring to fig. 8, the hardware structure of the circuit breaker testing device may include: at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4.

In the embodiment of the present application, the number of the processor 1, the communication interface 2, the memory 3, and the communication bus 4 is at least one, and the processor 1, the communication interface 2, and the memory 3 complete mutual communication through the communication bus 4.

The processor 1 may be a central processing unit CPU, or an Application Specific Integrated Circuit ASIC (Application Specific Integrated Circuit), or one or more Integrated circuits configured to implement the embodiments of the present Application, etc.;

the memory 3 may include a high-speed RAM memory, and may further include a non-volatile memory (non-volatile memory) or the like, such as at least one disk memory;

wherein the memory stores a program and the processor can call the program stored in the memory, the program for: and realizing each processing flow in the terminal circuit breaker testing scheme.

Embodiments of the present application further provide a readable storage medium, where the storage medium may store a program adapted to be executed by a processor, where the program is configured to: and realizing each processing flow of the terminal in the circuit breaker testing scheme.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. The various embodiments may be combined with each other. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circuit breaker testing method, comprising:

inputting each first target signal into a last circuit breaker protection device to be tested in a preset test environment for testing to obtain a first target test result of each first target signal;

judging whether each first target test result meets a preset test requirement or not, wherein the preset test requirement is a requirement for meeting the protection function of a last circuit breaker of a current converter of the high-voltage direct-current transmission system;

judging whether each second target test result is completely consistent with a first target test result of a first target signal corresponding to a second target signal corresponding to each second target test result;

2. The method of claim 1, wherein the preset automation program setting process comprises:

setting an initial value of each bit of the first target array to 0;

3. The method of claim 2, wherein generating the first set of target signals using a pre-set automation program comprises:

constructing different target switch state combinations according to the second target arrays to obtain a switch state combination set of an alternating current field, wherein the switch state combination set of the alternating current field comprises a plurality of different target switch state combinations;

4. The method of claim 1, further comprising:

5. The method according to any one of claims 1-4, wherein the predetermined test requirements comprise:

6. Method according to claim 2, characterized in that the preset time interval is set in dependence of the total number of switches of the alternating current field to be tested and the test time requirement.

7. The method according to claim 2, wherein the preset threshold is 1, and when the preset threshold is 1, the state of the switch corresponding to the bit with the value of 1 in the first target array is characterized as a closed state.

8. A circuit breaker testing apparatus, comprising:

the test unit is used for inputting each first target signal into a last circuit breaker protection device to be tested in a preset test environment to test to obtain a first target test result of each first target signal;

a second determining unit, configured to determine whether each of the second target test results is completely consistent with a first target test result of a first target signal corresponding to a second target signal corresponding to each of the second target test results;

9. A circuit breaker testing apparatus, comprising: one or more processors, and a memory;

the memory has stored therein computer readable instructions which, when executed by the one or more processors, carry out the steps of the circuit breaker testing method of any one of claims 1 to 7.

10. A readable storage medium, characterized by: the readable storage medium having stored therein computer readable instructions which, when executed by one or more processors, cause the one or more processors to carry out the steps of the circuit breaker testing method of any one of claims 1 to 7.