Relay protection device loop on-line inspection method and automatic test system

Abstract

The invention provides a relay protection device loop on-line inspection method and an automatic test system, the automatic test system comprises a test host, a switch, a merging device, a protection device and a terminal device, the loop on-line inspection method comprises the following steps: performing simulation configuration based on test items according to requirements and generating a wave recording file; transmitting a test file to a merging device and a terminal device based on the wave recording file data, the system configuration file data of the whole station and the input configuration information of the user interface; controlling the merging device and the terminal device to start and play back a test file; and controlling the protection device to send a tripping and closing command to the terminal device. According to the embodiment of the invention, the characteristics of intelligent station relay protection digital acquisition and digital transmission are considered, the relay protection test function is completed through a closed loop system formed by the test host, the merging device and the terminal device, and the online test of the protection device is truly realized.

Description

Technical Field

[0001] The present disclosure relates to the technical field of relay protection device testing, and in particular to an online circuit inspection method and an automatic testing system for a relay protection device. Background Art

[0002] The inspection of traditional substation relay protection devices is to use special relay protection test instruments to simulate the device and test the correctness of the protection software's action logic and the tripping and closing output circuit. The test process is completed manually, including wiring, setting test content, and confirming test results. The intelligent substation relay protection consists of three parts, and the protection test also includes these three parts, testing the merging unit, protection device and intelligent terminal respectively. The test of the merging unit and the intelligent terminal is composed of a tester and message analysis. The test equipment of the protection device has changed from a traditional analog output tester to a digital output tester. In order to improve the test efficiency, equipment manufacturers have studied different types of test tools.

[0003] Compared with traditional station testing, some new problems have emerged in the intelligent station relay protection testing, which are reflected in the following aspects: (1) The testing equipment has high requirements on the quality of personnel. Digital testing equipment has many parameters related to operation that need to be set, which requires manual intervention from testers. This requires testers to have a thorough understanding of the protocol in order to set it correctly. (2) The workload of protection logic testing is large. Different logic tests of the protection device generally need to be reset. When there are many protection logics, the testing workload is large, and for some reason, there are problems with some logic omissions. (3) In the case of no intelligent terminal testing, it is necessary to manually judge the correctness of the GOOSE tripping message. (4) Frequent plugging and unplugging of optical fibers causes damage to the optical port, reducing the reliability of optical fiber communication. Summary of the invention

[0004] In view of this, the present disclosure aims to provide an online inspection method and automatic testing system for a relay protection device circuit, so as to solve the technical problems in the prior art that manual intervention of testers is required and different logic tests of the protection device generally need to be re-set.

[0005] One aspect of the present disclosure provides a method for online inspection of a circuit of a relay protection device, which is used in an automatic test system of a relay protection device, wherein the automatic test system includes a test host, a switch, a merging device, a protection device, and a terminal device, and the method for online inspection of the circuit includes:

[0006] Perform simulation configuration based on test items and generate recording files according to requirements;

[0007] Transmitting a test file to the merging device and the terminal device based on the wave recording file data, the system configuration file data of the entire station, and the input configuration information of the user interface;

[0008] Controlling the merging device and the terminal device to start and play back the test file;

[0009] The protection device is controlled to send a tripping and closing command to the terminal device.

[0010] In some embodiments, the online inspection method for the relay protection device circuit also includes setting safety measures, and the safety measures include at least: setting a hard pressure plate for identifying the maintenance status for the merging device, the terminal device and the protection device; setting a soft pressure plate for the merging device to receive for the protection device; the merging device sets a soft pressure plate for the merging device output according to the physical port; the terminal device sets a soft pressure plate for GOOSE link reception according to subscription; the protection device sets a soft pressure plate for GOOSE link reception according to subscription.

[0011] In some embodiments, the system configuration file data of the entire station includes at least network port setting information, GOOSE configuration information and GOOSE virtual terminal configuration information; the input configuration information of the user interface includes interval selection and data message time length.

[0012] Another aspect of the present disclosure provides an automatic testing system, which adopts any of the above-mentioned methods for online inspection of the circuit of the relay protection device.

[0013] In some embodiments, the test host includes a test module, a simulation analysis module, a recording and playback module, a test evaluation module and a system configuration module. The test module is used to implement the test function; the simulation analysis module is used to generate a recording file after fault simulation; the recording and playback module is used to test the impact of specific fault data on relay protection; the test evaluation module is used to analyze and evaluate the correctness of the protection action logic; and the system configuration module is used to generate a test file.

[0014] In some embodiments, the test module generates multiple recording data based on a first predetermined interval, the simulation analysis module simulates a fault in the simulation system and generates current and voltage data based on a second predetermined interval, and generates a recording file in COMTRADE format based on the second predetermined interval.

[0015] In some embodiments, the test functions include at least current and voltage amplitude and phase test, voltage and frequency test, voltage and current protection setting value test, distance protection impedance test and differential test.

[0016] In some embodiments, the merging device, the protection device and the terminal device support point-to-point connection and networking connection.

[0017] In some embodiments, the terminal device and the protection device and / or a plurality of the protection devices transmit a GOOSE signal to have a control command monitoring return confirmation function.

[0018] In some embodiments, a command monitoring logical node is centrally set in the GOOSE data set in the models of the protection device and the terminal device; and a short address is set in the communication program of the protection device and the terminal device and corresponds one-to-one with the command monitoring logical node in the model.

[0019] The disclosed embodiments apply the technical advantages of digital information, networking of communication platforms, and standardization of information sharing in smart substations, and take into account the characteristics of digital acquisition and digital transmission of relay protection in smart stations. The function of relay protection testing is completed through a closed-loop system composed of a test host, a merging device, and a terminal device, thereby truly realizing online testing of protection devices.

[0020] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method. The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of this application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0022] Figure 1 is a schematic diagram of the structure of an automatic testing system in an embodiment of the present disclosure;

[0023] Figure 2 It is a flow chart of an online inspection method for a relay protection device circuit in one embodiment of the present disclosure;

[0024] Figure 3 It is a schematic diagram of the steps of an online inspection method for a relay protection device circuit in one embodiment of the present disclosure;

[0025] Figure 4 This is a schematic diagram of the existing GOOSE control command operation flow;

[0026] Figure 5 It is a schematic diagram of the GOOSE command operation flow in which a command monitoring function is added in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, but are not intended to limit the present disclosure.

[0028] It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0029] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0030] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the attached drawings.

[0031] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0032] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0033] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0036] The first embodiment of the present disclosure provides a method for online inspection of a circuit of a relay protection device, wherein the relay protection device is arranged in a smart substation, and the method for online inspection of the circuit is implemented by an automatic testing system for the relay protection device, such as Figures 1 to 5 As shown, the automatic test system here includes a test host 1, a switch 2, a merging device 3, a protection device 4 and a terminal device 5, wherein the merging device 3, the protection device 4 and the terminal device 5 support point-to-point connection and networking connection.

[0037] Specifically, the merging device 3 and the protection device 4 support point-to-point connection, and the protection device 4 and the terminal device 5 support point-to-point connection; in addition to the point-to-point connection, the merging device 3, the protection device 4 and the terminal device 5 are all provided with a networking interface to realize the networking connection, wherein the merging device 3, the protection device 4 and the terminal device 5 can also be connected to the switch 2 through the networking interface, and the test host 1 here is connected to the merging device 3, the protection device 4 and the terminal device 5 through the switch 2. In this way, in this embodiment, online testing is realized through the networking connection between different devices.

[0038] Specifically, the test host 1 includes a test module 11, a simulation analysis module 12, a recording and playback module 13, a test evaluation module 14 and a system configuration module 15, wherein the test module 11, the simulation analysis module 12 and the recording and playback module 13 are three independent functional modules.

[0039] Specifically, the test module 11 here implements the test function of the relay protection tester in the traditional substation, and the test function at least includes the basic functions of relay protection such as current and voltage amplitude phase test, voltage and frequency test, voltage and current protection setting value test, distance protection impedance test and differential test. The test module 11 generates recording data after the test. Especially when multi-interval data is required for differential protection, the test module 11 generates multiple recording data based on the first predetermined interval. For this purpose, the recording data includes, for example, interval voltage, interval current, measured current, etc. The recording data here is stored in the standard COMTRADE format.

[0040] Furthermore, the simulation analysis module 12 is used to generate a recording file after fault simulation, specifically simulating the fault occurring in the simulation system and generating voltage and current data based on the second predetermined interval, and generating a recording file in a standard COMTRADE format according to the second predetermined interval. The simulation analysis module 12 is particularly based on the power system real-time simulation software PSCAD, and sets a system fault through the power system modeling method. The above-mentioned first predetermined interval and second predetermined interval can be set as needed.

[0041] The recording and playback module 13 is used to test the influence of specific fault data on relay protection, where the fault data can be data of operating system accidents or dynamic model test data. The input data of the recording and playback module 13 is a recording file in COMTRADE format, and the recording data of intervals are generated in the recording file at predetermined intervals.

[0042] The test evaluation module 14 is used to analyze and evaluate the correctness of the protection action logic, and in particular to analyze the test results to evaluate whether the action behavior of the protection device 4 is correct or not. After the test starts, the test evaluation module 14 obtains the digital message of the protection device 4 through, for example, a network to confirm the test result.

[0043] The system configuration module 15 is used to generate a test file, which is a service module of the test function, wherein the input parameters of the system configuration module 15 include the recording file data transmitted by the simulation analysis module 12, the system configuration file data (SCD) of the whole station, and the input configuration information of the user interface (HMI). The recording file data here is converted into sampling value data that meets the requirements of IEC 61850-9-2; the system configuration file data of the whole station includes configuration information such as network port settings, GOOSE configuration, GOOSE virtual terminal configuration, etc.; the input configuration information of the user interface includes interval selection, data message time length, etc. The system configuration module 15 here finally generates the test files test.dat and test.cfg required for the test, and sends them to the merging device 3 and the terminal device 5, wherein when the test host 1 triggers the test, the merging device 3 and the terminal device 5 transmit the data in test.dat from the whole second.

[0044] The online test process of the online inspection method for the relay protection device circuit provided by the embodiment of the present disclosure is as follows: Figure 2 As shown, combined Figure 3 As shown, the loop online inspection method includes:

[0045] S101, perform simulation configuration based on the test project according to requirements and generate a recording file.

[0046] In this step, simulation configuration is performed based on the test items according to the requirements and a recording file is generated. Specifically, after the test starts, the test module 11 receives the user's requirements, and the simulation analysis module 12 performs simulation configuration based on the selected test items, especially for simulating the failure of the simulation system, as shown in the following example. Figure 2 As shown in process 1 in the above, the simulation analysis module 12 generates 5s-30s of recording data at predetermined intervals to form a recording file, and the recording file is stored in COMTRADE format, such as Figure 2 This is shown in process 2.

[0047] S102, transmitting a test file to a merging device and a terminal device based on the wave recording file data, the system configuration file data of the entire station, and the input configuration information of the user interface.

[0048] After the simulation configuration is performed based on the test items according to the requirements and the recording file is generated in the above step S101, in this step, the test file is transmitted to the merging device and the terminal device based on the recording file data, the system configuration file data of the whole station and the input configuration information of the user interface. Specifically, the recording file data in the COMTRADE format, the system configuration file data of the whole station and the input configuration information of the user interface are read by the system configuration module 15, and the test files in the test.dat and test.cfg formats are generated, and downloaded to the merging device 3 and the terminal device 5 through the network, for example. Figure 2 This is shown in processes 3 and 4.

[0049] S103, controlling the merging device and the terminal device to start and play back the test file.

[0050] After the designated file is transmitted to the merging device and the terminal device based on the recording file data, the system configuration file data of the whole station and the input configuration information of the user interface in the above step S102, in this step, the merging device and the terminal device are controlled to start and play back the test file. Specifically, the test module 11 of the test host 1 sends a start command to the merging device 3 and the terminal device 5. After receiving the start command, the merging device 3 and the terminal device 5 synchronously play back the data of the test file on the data bus, as shown in process 5 in the figure.

[0051] S104, controlling the protection device to send a tripping and closing command to the terminal device.

[0052] After the merging device and the terminal device are controlled to start and play back the test file in step S103, in this step, the protection device is controlled to send a tripping and closing command to the terminal device. Specifically, the protection device 4 processes the real-time data sent by the merging device 3 and the terminal device 5 and performs logical judgment, and sends the tripping and closing command for protection to the terminal device 5, such as Figure 2 This is shown in Processes 6 and 7.

[0053] In addition, the loop online inspection method further includes: evaluating the action behavior of the protection device. Specifically, in this embodiment, the test evaluation function of the test module 11 can also be used to evaluate the action behavior of the protection device 4, as shown in process 8 in the figure.

[0054] The purpose of this embodiment is to test the relay protection, and the tests involved include pre-operation detection, periodic maintenance of the protection device 4 after a period of operation, and testing when an abnormality occurs during the operation of the protection device 4 and needs to be eliminated. When performing online testing, safety during the test process must be given priority consideration.

[0055] To this end, the relay protection device circuit online inspection method further includes setting safety measures, where the safety measures at least include:

[0056] (1) A hard pressure plate for marking the maintenance status is provided for the merging device 3, the terminal device 5 and the protection device 4. When the above devices need maintenance or abnormality elimination, the hard pressure plate is put into use to mark the entry into the maintenance status;

[0057] (2) A soft pressure plate for receiving the merging device is provided for the protection device 4. When the merging device 3 is under maintenance, if it is not stopped for an interval, the protections related to the merging device 3 should be put into the hard pressure plate for marking the maintenance status; if it is stopped for an interval, the protections related to the merging device 3 only need to withdraw the soft pressure plate for receiving the merging device;

[0058] (3) The merging device 3 is provided with a soft pressure plate for the output of the merging device according to the physical port. Here, when the soft pressure plate for the output of the merging device is withdrawn, the analog output of the online test can be performed;

[0059] (4) The terminal device 5 sets the soft pressure plate for GOOSE link reception according to the subscription. If the protection device 4 is under maintenance, it is only necessary to set the soft pressure plate for GOOSE link reception subscribed to the protection to exit, and the terminal device 5 does not process the GOOSE link related to the protection. When the soft pressure plate for GOOSE link reception exits, the input and output of the switch quantity of the online test can be performed;

[0060] (5) The protection device 4 sets the soft pressure plate for GOOSE link reception according to the subscription. If the terminal device 5 is under maintenance, it is only necessary to set the soft pressure plate for GOOSE link reception related to the terminal device 5 to exit, and the protection device 4 does not process the GOOSE link related to the terminal device 5.

[0061] The implementation of the above-mentioned safety measures can be accomplished through intelligent means, so that the integrated monitoring system of the smart substation can be programmed to achieve control, thus realizing one-click safety measures.

[0062] It should be noted that, in the specific execution process of the test case, for the three parts constituting the relay protection system, namely the merging device 3, the terminal device 5 and the protection device 4, considering that the merging device 3 is the output source of the electrical quantity, and the terminal device 5 is the input source of the switch quantity and the output source of the tripping, when one of the merging device 3 and the terminal device 5 fails, the relay protection function will be exited. The processing principle here can put all three into maintenance. The protection device 4 is an intermediate device. When it fails, it only needs to be exited, and other devices can still operate normally. For example, when the line protection device fails, the busbar protection can still operate normally.

[0063] Specifically, taking the line interval as an example, in the process of eliminating the abnormality of the protection device 4, that is, in the specific execution process of the online test, for example, when the line protection device has an abnormality, which may include hardware faults and software faults, the processing process is as follows:

[0064] (1) Put the hard pressure plate used to mark the maintenance status into use;

[0065] (2) Replace the hardware and software and download the configuration file;

[0066] (3) exiting the soft pressure plate for GOOSE link reception of the subscription line of the interval terminal device 5;

[0067] (4) The physical port output by the merging device 3 to the line protection is used for the soft pressure plate output by the merging device to exit;

[0068] (5) Selecting a corresponding test module in the test host, using basic test elements such as voltage, current, and distance, etc., completing the acquisition of test data through the system configuration module 15 and downloading it to the merging device 3 and the terminal device 5;

[0069] (6) controlling the test host 1 to trigger a test;

[0070] (7) The merging device 3 and the terminal device 5 output setting data;

[0071] (8) The test evaluation module 14 detects the action behaviors of the protection device 4 and the terminal device 5 to determine the correctness of the protection action logic.

[0072] The above process is a test flow. When all the set test functions are completed, the test host 1 can automatically generate a test report according to a pre-defined template. By adopting the above test method, human intervention can be reduced, and the test time of a whole set of protection can be controlled within 2 hours, for example, thereby effectively improving the test efficiency.

[0073] A second embodiment of the present disclosure provides an automatic testing system for a relay protection device, which adopts the above-mentioned online inspection method for the circuit of a relay protection device. Specifically, the automatic testing system includes a test host 1, a switch 2, a merging device 3, a protection device 4 and a terminal device 5, wherein the merging device 3, the protection device 4 and the terminal device 5 support point-to-point connection and networking connection.

[0074] In this embodiment, the merging device 3, the protection device 4 and the terminal device 5 belong to intelligent electrical substation equipment (IED). This embodiment realizes status monitoring by means of a GOOSE virtual loop method that extends the model of the intelligent electrical substation equipment, wherein signals are transmitted between the intelligent electrical substation equipment via a GOOSE link, thereby creating conditions for realizing status monitoring of the secondary circuit.

[0075] The GOOSE link mechanism generally detects whether the physical channel used for transmission is normal through heartbeat messages, but cannot monitor whether the communication between intelligent substation equipment is normal after protection is started. At present, the 61850 protocol does not specify the control command monitoring function of the terminal device 5, that is, the terminal device 5 currently used does not have a control command monitoring return confirmation function.

[0076] In this embodiment, a control command monitoring return confirmation function is added to both the protection device 4 and the terminal device 5. In this way, when a protection tripping command, a measurement and control remote control command, etc. are issued, the return confirmation function of the terminal device 5 can be used to determine whether the terminal device 5 has correctly received the command, thereby quickly improving the troubleshooting efficiency.

[0077] Specifically, the existing GOOSE control command operation process is as follows: Figure 4 As shown, taking the protection tripping as an example, first, the protection device 4 performs the protection tripping action through the built-in CPU processing judgment, and the protection device 4 corresponds to the data in the CID model of the protection device 4 through the short address correspondence relationship, and the communication process forwards the GOOSE tripping command to the terminal device 5 through the optical fiber. The terminal device 5 receives the GOOSE tripping command through the communication process and converts it into a short address inside the device, and reads the execution command through the built-in CPU. In this way, the transmission process of the entire GOOSE command is in an open-loop state, and there is no closed-loop transmission. The GOOSE command transmission, measurement and control between the merging device 3 and the protection device 4, and the transmission with the terminal device 5 are also the same. This leads to the fact that after the protection tripping command is issued, the protection device 4 cannot confirm whether the terminal device 5 has correctly received the protection tripping command.

[0078] like Figure 5As shown, in this embodiment, for example, the terminal device 5 can be added with a protection trip command monitoring function, and the GOOSE control command operation process is as follows: Figure 4 As shown, taking protection tripping as an example, after the terminal device 5 receives the tripping command issued by the protection device 4, the terminal device 5 replies with a frame of command monitoring confirmation message to the protection device 4 when the confirmation device has received and can correctly forward the tripping command. The protection device 4 receives the confirmation message from the terminal device 5 and records it for query.

[0079] The following description is made by taking the example of adding a protection trip command monitoring function to the terminal device 5. The command monitoring function here needs to meet two basic conditions: (1) a command monitoring logical node is set in the GOOSE data set in the model of the protection device 4 and the terminal device 5; (2) the communication program of the protection device 4 and the terminal device 5 sets a short address and corresponds one-to-one with the command monitoring logical node in the model. Specifically, in the ICD model of the terminal device 5, five data nodes, protection trip A, protection trip B, protection trip C, measurement and control closing, and measurement and control opening command monitoring, are added to the command data set: then the communication process of the terminal device 5 is modified, and the corresponding short address is added (the short address is written into the corresponding memory), and the short address corresponds one-to-one with the command monitoring point in the ICD model: finally, the communication process is recompiled and the program is updated.

[0080] The protection device 4 is also configured through the above process, and finally the virtual terminal connection and CID file download are performed through the SCD configuration tool, so that after the protection device 4 sends the jump command to the terminal device 5, the terminal device 5 returns the command message correctly received by the protection device after command monitoring. The specific internal processing flow of the protection device 4 and the terminal device 5 is as follows: Figure 5 shown.

[0081] Of course, when there are multiple protection devices 4, the command monitoring function mentioned above is also applicable to the detection of GOOSE signals between two protection devices 4, such as failure of line protection to start bus differential protection. In normal operation, one protection device 4 can periodically send a GOOSE signal with a test mark to another protection device 4, and confirm whether the protection device 4 on the opposite side has received it correctly based on the feedback information.

[0082] In this way, link status monitoring of the application layer is realized by GOOSE signals between the terminal device 5 and the protection device 4 and between the protection devices 4, making it possible to perform maintenance on the relay protection status of the smart substation.

[0083] Compared with the traditional substation, the implementation mode of the relay protection of the intelligent substation disclosed in the present invention has undergone fundamental changes. Its functions are realized through three parts: a merging device, a protection device and a terminal device. The voltage and current AC quantity acquisition is realized by the merging device, and the merging device transmits the electrical quantity data to the protection device through Ethernet using the sampling value protocol of IEC 61850-9-2. The switch quantity acquisition and protection tripping and closing are completed by the terminal device. The protection device and the terminal device are transmitted through GOOSE messages. The protection logic judgment is completed by the protection device. The protection device integrates the current and voltage information and the input quantity information, completes the traditional logic calculation and transmits the action result to the terminal device through GOOSE, and the terminal device completes the tripping and closing operation of the switch.

[0084] The disclosed embodiment takes into account the characteristics of digital acquisition and digital transmission of relay protection in intelligent stations, and completes the function of relay protection testing through a closed-loop system consisting of a test host, a merging device and a terminal device, thereby truly realizing online testing of the protection device.

[0085] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0086] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0087] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0088] In the embodiments provided in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0089] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0091] If the integrated module is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned method embodiment when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0092] In addition, the features of the embodiments shown in the drawings of the present application or the various embodiments mentioned in this specification are not necessarily understood as independent embodiments. Instead, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the drawings.

[0093] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for online inspection of a relay protection device circuit, which is used in an automatic test system for a relay protection device, wherein the automatic test system comprises a test host, a switch, a merging device, a protection device and a terminal device, and is characterized in that: The loop online inspection method comprises: Perform simulation configuration based on test items and generate recording files according to requirements; Transmitting a test file to the merging device and the terminal device based on the wave recording file data, the system configuration file data of the entire station, and the input configuration information of the user interface; Controlling the merging device and the terminal device to start and play back the test file; The protection device is controlled to send a tripping and closing command to the terminal device.

2. The method for online inspection of the relay protection device circuit according to claim 1, characterized in that: The online inspection method for the relay protection device circuit also includes setting safety measures, and the safety measures at least include: setting a hard pressure plate for identifying the maintenance status for the merging device, the terminal device and the protection device; setting a soft pressure plate for the merging device to receive for the protection device; the merging device sets a soft pressure plate for the merging device output according to the physical port; the terminal device sets a soft pressure plate for GOOSE link reception according to subscription; the protection device sets a soft pressure plate for GOOSE link reception according to subscription.

3. The method for online inspection of a relay protection device circuit according to claim 1, characterized in that: The system configuration file data of the whole station at least includes network port setting information, GOOSE configuration information and GOOSE virtual terminal configuration information; the input configuration information of the user interface includes interval selection and data message time length.

4. An automatic testing system, characterized in that: An online inspection method for the circuit of a relay protection device is adopted as described in any one of claims 1 to 3.

5. The automatic testing system according to claim 4, characterized in that: The test host includes a test module, a simulation analysis module, a recording and playback module, a test evaluation module and a system configuration module. The test module is used to implement the test function; the simulation analysis module is used to generate a recording file after fault simulation; the recording and playback module is used to test the impact of specific fault data on relay protection; the test evaluation module is used to analyze and evaluate the correctness of the protection action logic; and the system configuration module is used to generate a test file.

6. The automatic testing system according to claim 5, characterized in that: The test module generates a plurality of waveform data based on a first predetermined interval, the simulation analysis module simulates a fault in the simulation system and generates current and voltage data based on a second predetermined interval, and generates a waveform file in COMTRADE format based on the second predetermined interval.

7. The automatic testing system according to claim 5, characterized in that: The test functions at least include current and voltage amplitude and phase test, voltage and frequency test, voltage and current protection setting value test, distance protection impedance test and differential test.

8. The automatic testing system according to claim 4, characterized in that: The merging device, the protection device and the terminal device support point-to-point connection and networking connection.

9. The automatic testing system according to claim 4, characterized in that: The terminal device and the protection device and / or a plurality of protection devices transmit GOOSE signals to provide a control command monitoring return confirmation function.

10. The automatic testing system according to claim 9, characterized in that: The GOOSE data set in the models of the protection device and the terminal device sets a command monitoring logical node; the communication program of the protection device and the terminal device sets a short address and corresponds one-to-one with the command monitoring logical node in the model.

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