A method for online interaction between bay protection devices and station protection control devices

Abstract

This application provides an online interaction method between a bay protection device and a station domain protection control device, comprising: obtaining the current IP address of a bay protection message sent by a target bay protection device, wherein the target bay protection device is any one of multiple bay protection devices; querying the system configuration file for the target IP address that is the same as the current IP address based on the current IP address of the bay protection message to obtain the device name corresponding to the target IP address; determining whether the device name corresponding to the target IP address is the same as the device name of the target bay protection device corresponding to the current IP address; if the device name corresponding to the target IP address is different from the device name of the target bay protection device corresponding to the current IP address, issuing an alarm signal. This application can complete the online interaction between the bay protection device and the station domain protection control device, and simultaneously realize the bay protection information verification function, reducing the workload of manual verification.

Description

Technical Field

[0001] This application relates to the field of power system technology, specifically to an online interaction method between a bay protection device and a station protection control device. Background Technology

[0002] In power systems, relay protection plays a crucial role in ensuring grid security. In emergencies, rapid fault isolation is essential. However, with ever-increasing electricity demand, traditional relay protection systems have revealed numerous problems, such as difficulties in coordinating backup protection settings, potential failure to operate or malfunctioning, and the risk of cascading trips leading to widespread power outages.

[0003] In recent years, the application of high-performance hardware processing chips, electronic instrument transformers, and other hardware has become increasingly mature. Combined with high-speed communication networks and the IEC 61850 communication protocol, and leveraging the context of multi-network integration, the information obtained by relay protection in traditional substations has undergone significant changes. Compared with traditional relay protection, smart substations utilize intra-station or inter-station information to achieve information sharing and integration. This involves digitizing the collected information, standardizing information sharing, wide-area fiber optic communication, and networking the process-level communication platform, effectively addressing the problem of insufficient available information in traditional relay protection and greatly improving the control performance of relay protection.

[0004] Based on information sharing technology, the substation relay protection system of a smart substation can acquire various types of information, and its construction mode differs from that of traditional relay protection. To adapt to multi-information sharing technology, the new substation relay protection system is divided into three layers: the bay layer, the station domain layer, and the wide-area layer. The station domain layer protection, also known as station domain protection, refers to fully utilizing collected station domain information, such as information from outgoing lines, busbars, transformers, and other components within the station, as well as multi-source information from adjacent stations. It establishes a fiber optic communication network transmission platform for SV and GOOSE information, completes information interaction and transmission according to the IEC 61850 communication protocol, combines it with corresponding protection algorithms for decision-making, and integrates information to achieve the relay protection function.

[0005] While the substation protection system has optimized the protection structure, it currently operates as an independent device. This means that in emergency situations such as abnormalities or shutdowns of conventional interval protection, the substation protection system cannot detect these issues and therefore cannot provide reliable protection for the power system.

[0006] Currently, neither domestic nor foreign manufacturers have proposed an interaction method between the bay protection device and the station protection control device. This makes it impossible to achieve online interaction between the bay protection device and the station protection control device, which makes it difficult to optimize the protection function of the station protection control device, improve the performance of the station protection control device, and achieve the overall optimal configuration of the protection of the entire station.

[0007] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Summary of the Invention

[0008] The main technical problem addressed by this application is to provide an online interaction method and apparatus between a bay protection device and a station protection control device, which can complete the online interaction between the bay protection device and the station protection control device, realize the verification function of bay protection messages, and reduce the workload of manual verification.

[0009] To solve the above-mentioned technical problems, this application adopts the following technical solution: providing an online interaction method between a bay protection device and a substation protection control device, applied to a substation relay protection system. The substation relay protection system includes a substation protection control device and multiple bay protection devices, wherein each bay protection device has a different device name. The online interaction method between the bay protection device and the substation protection control device includes: Obtain the current IP address of the interval protection message sent by the target interval protection device, wherein the target interval protection device is any one of the multiple interval protection devices; Based on the current IP address of the interval protection message, the device name corresponding to the target IP address that is the same as the current IP address is obtained from the global system configuration file; Determine whether the device name corresponding to the target IP address is the same as the device name of the target interval protection device corresponding to the current IP address; If the device name corresponding to the target IP address is different from the device name of the target interval protection device corresponding to the current IP address, an alarm signal is issued.

[0010] Furthermore, the interval protection message includes the device name, event name, and event status.

[0011] Furthermore, the event state can be one of two states: the event has not occurred and the event has occurred.

[0012] Furthermore, the substation relay protection system includes a switching device, the station domain protection control device is connected to the switching device through the station control layer communication interface, and multiple bay protection devices are connected to the switching device through the station control layer communication interface. The bay protection devices and the station domain protection control device exchange information through the switching device.

[0013] Furthermore, the station domain protection control device receives the interval protection message sent by the interval protection device unidirectionally through the switching device, without sending information to the interval protection device, thus not affecting the operation of the interval protection device. The interval protection device sends the interval protection message unidirectionally through the switching device, without receiving information from the station domain protection control device.

[0014] Furthermore, the substation relay protection system includes a monitoring host, which is connected to the switch device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an interaction method between a bay protection device and a station area protection control device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a substation relay protection system provided in an embodiment of this application; Figure 3 This is a schematic diagram of information interaction among various devices in a substation relay protection system provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a station area protection and control device provided in an embodiment of this application; Figure 5 This is a schematic diagram of another site protection control device provided in the embodiments of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0020] It should be noted that, since the method in this application embodiment is executed in the station domain protection and control device, the processing objects of each station domain protection and control device exist in the form of data or information, such as time, which is essentially time information. It can be understood that if size, quantity, location, etc. are mentioned in subsequent embodiments, they are all corresponding data that exist so that the station domain protection and control device can process them. The specifics will not be elaborated here.

[0021] Example 1: To solve the problem of the inability to interact between the bay protection device and the station area protection control device in the prior art, such as... Figure 1 As shown, this embodiment provides an online interaction method between a bay protection device and a substation protection control device, applied to a substation relay protection system. The substation relay protection system includes a substation protection control device and multiple bay protection devices, each with a different device name. The online interaction method between the bay protection device and the substation protection control device includes: Step 10: Obtain the current IP address of the interval protection message sent by the target interval protection device.

[0022] The target bay protection device can be any one of multiple bay protection devices.

[0023] In this embodiment, each bay protection device has a different device name. The bay protection devices are standardized in their naming according to their bay protection category, and bay protection devices of the same category with dual configurations are numbered. For example... Figure 2 As shown, the multiple bay protection devices are: transformer protection device, line protection device, and busbar protection device. The transformer protection device is named PT01, the line protection device is named PL01, and the busbar protection device is named PM01.

[0024] When the multiple bay protection devices are: two transformer protection devices, two line protection devices and two busbar protection devices, the two transformer protection devices are named PT01 and PL01 respectively, the two busbar protection devices are named PM01 and PM02 respectively, and the two line protection devices are named PL01 and PL02 respectively.

[0025] like Figure 2 and Figure 3 As shown in the embodiment of this application, the substation relay protection system includes a switching device. The station-area protection control device is connected to the switching device through a station control layer communication interface. Multiple bay protection devices are connected to the switching device through the station control layer communication interface. The bay protection devices and the station-area protection control device exchange information through the switching device. The station-area protection control device unilaterally receives bay protection messages sent by the bay protection devices through the switching device, without sending information to the bay protection devices, thus not affecting the operation of the bay protection devices. The bay protection devices unilaterally send bay protection messages through the switching device, without receiving information from the station-area protection control device. The substation relay protection system includes a monitoring host, which is connected to the switching device.

[0026] Correspondingly, the station domain protection control device sends interval protection messages unidirectionally to the switching device, and the station domain protection control device obtains the current IP address of the interval protection message sent by the target interval protection device unidirectionally from the switching device.

[0027] Furthermore, the station protection control device determines the operating status of the interval protection through the interval protection message, and at the same time, combines the analog and switch quantities obtained from the station protection sampling to make a comprehensive decision and automatically realize the activation or deactivation of the protection function.

[0028] Step 20: Based on the current IP address of the interval protection message, query the system configuration file of the entire site to obtain the device name corresponding to the target IP address that is the same as the current IP address.

[0029] SCD is an abbreviation for substation configuration description in the IEC 61850 standard for substations, which is the system configuration file for the entire substation. The system configuration file stores the bay protection devices corresponding to each IP address.

[0030] The interval protection message includes the device name, event name, and event status. The event status is one of two states: the event has not occurred or the event has occurred. The event status is represented by 0 and 1, where 0 indicates that the event has not occurred and 1 indicates that the event has occurred.

[0031] Step 30: Determine whether the device name corresponding to the target IP address is the same as the device name of the target interval protection device corresponding to the current IP address.

[0032] Step 40: Issue an alarm signal.

[0033] In this embodiment, if the device name corresponding to the target IP address is different from the device name of the target interval protection device corresponding to the current IP address, an alarm signal is issued. If the device name corresponding to the target IP address is the same as the device name of the target interval protection device corresponding to the current IP address, the process ends.

[0034] The station domain protection control device retrieves the device name with the same IP address from the SCD file based on the IP address of the interval protection message, using the internally stored station-wide system configuration file SCD. The station domain protection control device then verifies the device name with the same IP address against the interval protection name in the interval protection message. If a verification error occurs, the interval protection message is discarded and an alarm is triggered, alerting operation and maintenance personnel to investigate.

[0035] This application provides an online interaction method and corresponding apparatus between a bay protection device and a station domain protection control device, comprising: obtaining the current IP address of a bay protection message sent by a target bay protection device, wherein the target bay protection device is any one of multiple bay protection devices; querying the system configuration file for the target IP address that is the same as the current IP address based on the current IP address of the bay protection message to obtain the device name corresponding to the target IP address; determining whether the device name corresponding to the target IP address is the same as the device name of the target bay protection device corresponding to the current IP address; and issuing an alarm signal if the device name corresponding to the target IP address is different from the device name of the target bay protection device corresponding to the current IP address. This application can complete the online interaction between the bay protection device and the station domain protection control device, and simultaneously realize the verification function of bay protection information, reducing the workload of manual verification.

[0036] Example 2: Based on the aforementioned Example 1, such as Figure 4This embodiment provides a station area protection control device, including: The acquisition module 401 is used to acquire the current IP address of the interval protection message sent by the target interval protection device, wherein the target interval protection device is any one of the plurality of interval protection devices.

[0037] The query module 402 is used to query the system configuration file of the entire site to obtain the device name corresponding to the target IP address that is the same as the current IP address, based on the current IP address of the interval protection message.

[0038] The judgment module 403 is used to determine whether the device name corresponding to the target IP address is the same as the device name of the target interval protection device corresponding to the current IP address.

[0039] The alarm module 404 is used to issue an alarm signal if the device name corresponding to the target IP address is different from the device name of the target interval protection device corresponding to the current IP address.

[0040] For the specific implementation method, please refer to Example 1, which will not be repeated here.

[0041] Example 3: This application also provides a station area protection control device, such as... Figure 5 As shown, it illustrates the structural schematic diagram of the station area protection and control device involved in the embodiments of this application. Specifically: The station domain protection control device may include components such as a processor 501 with one or more processing cores, a memory 502 with one or more computer-readable storage media, a power supply 503, and an input unit 504. Those skilled in the art will understand that the structure of the station domain protection control device shown in the figures does not constitute a limitation on the station domain protection control device, and it may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein: Processor 501 is the control center of the station domain protection and control device. It connects to various parts of the device via various interfaces and lines. By running or executing software programs and / or modules stored in memory 502, and by calling data stored in memory 502, it performs various functions and processes data of the station domain protection and control device, thereby providing overall monitoring of the device. Optionally, processor 501 may include one or more processing cores; preferably, processor 501 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into processor 501.

[0042] The memory 502 can be used to store software programs and modules. The processor 501 executes various functional applications and data processing by running the software programs and modules stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created based on the use of the station domain protection control device, etc. In addition, the memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 502 may also include a memory controller to provide the processor 501 with access to the memory 502.

[0043] The station protection and control device also includes a power supply 503 that supplies power to various components. Preferably, the power supply 503 can be logically connected to the processor 501 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 503 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0044] The station protection control device may also include an input unit 504, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0045] Although not shown, the station domain protection control device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 501 in the station domain protection control device loads the executable files corresponding to the processes of one or more application programs into the memory 502 according to the following instructions, and the processor 501 runs the application programs stored in the memory 502 to realize various functions, as follows: Obtain the current IP address of the interval protection message sent by the target interval protection device, wherein the target interval protection device is any one of the multiple interval protection devices; Based on the current IP address of the interval protection message, the device name corresponding to the target IP address that is the same as the current IP address is obtained from the global system configuration file; Determine whether the device name corresponding to the target IP address is the same as the device name of the target interval protection device corresponding to the current IP address; If the device name corresponding to the target IP address is different from the device name of the target interval protection device corresponding to the current IP address, an alarm signal is issued.

[0046] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0047] To this end, embodiments of this application provide a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), disk, or optical disk, etc. A computer program is stored on it, which is loaded by a processor to execute the steps in any of the online interaction methods between a bay protection device and a station domain protection control device provided in embodiments of this application. For example, the computer program loaded by the processor can execute the following steps: obtaining the current IP address of the bay protection message sent by the target bay protection device, wherein the target bay protection device is any one of a plurality of bay protection devices; querying the system configuration file for the entire station based on the current IP address of the bay protection message to obtain the device name corresponding to the target IP address that is the same as the current IP address; determining whether the device name corresponding to the target IP address is the same as the device name of the target bay protection device corresponding to the current IP address; if the device name corresponding to the target IP address is not the same as the device name of the target bay protection device corresponding to the current IP address, issuing an alarm signal.

[0048] In practice, each of the above units or structures can be implemented as an independent entity or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of each of the above units or structures, please refer to the previous method embodiments, which will not be repeated here.

[0049] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0050] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for interaction between a bay protection device and a station protection control device, characterized in that, This invention relates to a substation relay protection system, which includes a station-area protection control device and multiple bay protection devices. Each bay protection device has a different name, and the interaction method between the bay protection devices and the station-area protection control device includes: Obtain the current IP address of the interval protection message sent by the target interval protection device, wherein the target interval protection device is any one of the multiple interval protection devices; Based on the current IP address of the interval protection message, the device name corresponding to the target IP address that is the same as the current IP address is obtained from the global system configuration file; Determine whether the device name corresponding to the target IP address is the same as the device name of the target interval protection device corresponding to the current IP address; If the device name corresponding to the target IP address is different from the device name of the target interval protection device corresponding to the current IP address, an alarm signal is issued; The substation relay protection system includes a switching device. The station area protection control device is connected to the switching device through a station control layer communication interface. Multiple bay protection devices are connected to the switching device through a station control layer communication interface. The bay protection devices and the station area protection control device exchange information through the switching device.

2. The interaction method between the bay protection device and the station protection control device according to claim 1, characterized in that, The interval protection message includes the device name, event name, and event status.

3. The interaction method between the bay protection device and the station protection control device according to claim 2, characterized in that, The event state can be one of two states: the event has not occurred and the event has occurred.

4. The interaction method between the bay protection device and the station protection control device according to claim 3, characterized in that, The station domain protection control device receives interval protection messages sent by the interval protection device unidirectionally through the switching device, without sending information to the interval protection device, and does not affect the operation of the interval protection device. The interval protection device sends interval protection messages unidirectionally through the switching device, without receiving information from the station domain protection control device.

5. The interaction method between the bay protection device and the station protection control device according to claim 3, characterized in that, The substation relay protection system includes a monitoring host, which is connected to the switch device.

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