Relay protection function operation state risk early warning method and device

Abstract

The invention provides a relay protection function operation state risk early warning method and device, and the method mainly comprises the steps: obtaining the operation state of each element in relay protection equipment in real time, and carrying out the periodic inspection of a constant value of each element; when the running state changes or the fixed value does not accord with the preset value, obtaining current element information; determining a protection function state according to the operation mode of the primary equipment; the protection function state is verified, the state is normal if consistent, and the state is abnormal if not consistent; and if so, generating early warning information. According to the method, through double triggering of fixed value detection and period detection, routing inspection and alarm of daily and sudden faults are achieved, and power grid faults or accidents can be avoided.

Description

Technical Field

[0001] The present application belongs to the field of relay protection early warning, and in particular, relates to a method and device for early warning of the risk of the operating status of a relay protection function. Background Art

[0002] Relay protection devices play a vital role in the power system and are an indispensable part of ensuring the safe and stable operation of the power grid. The main function of these devices is to monitor the electrical quantities (such as current, voltage, frequency, etc.) and non-electrical quantities (such as temperature, pressure, etc.) in the power system, and when abnormal conditions (such as short circuit, overload, ground fault, etc.) are detected in the system, they can quickly and accurately cut off the connection between the faulty part and the system to prevent the fault from expanding and protect the overall safety of power equipment and the power grid.

[0003] However, when the operating state of the relay protection device itself is abnormal, its protection function may be seriously affected or even fail. Summary of the invention

[0004] The purpose of this application is to overcome the problems existing in the above-mentioned prior art and to provide a method and device for early warning of the risk of the operating status of a relay protection function.

[0005] The present application provides a method for early warning of the risk of an operating state of a relay protection function, comprising:

[0006] Obtain the real-time operating status of each element in the relay protection equipment and the fixed value of each element during periodic inspection;

[0007] If the operating state changes or the set value is inconsistent with the preset value, obtaining current element information of each element from the relay protection device;

[0008] Determining the protection function status of the relay protection device through the operation mode of the primary device;

[0009] Verifying the protection function status according to the current element information, including: if the verification result is that the status is consistent, the protection function operates normally; if the verification result is that the status is inconsistent, the protection function operates abnormally;

[0010] If the protection function operates abnormally, warning information of the element corresponding to the abnormal operation of the function is generated for warning.

[0011] Optionally, the elements include:

[0012] Control words, soft pressure plate, functional hard pressure plate and export pressure plate.

[0013] Optionally, if the warning information includes:

[0014] Anomaly type, risk description, risk level and response strategy.

[0015] Optionally, the current element information includes:

[0016] Control word setting, soft pressure plate setting, functional hard pressure plate setting and export pressure plate setting.

[0017] Optionally, the period of the periodic inspection includes: between 20:00 on the current day and 7:00 on the next day.

[0018] The present application also provides a relay protection function operation status risk warning device, comprising:

[0019] Acquisition module, which obtains the real-time operating status of each element in the relay protection equipment and the fixed value of each element during periodic inspection;

[0020] A judgment module, if the operating state changes or the set value is inconsistent with the preset value, obtains the current element information of each element from the relay protection device;

[0021] An identification module determines the protection function status of the relay protection device through the operation mode of the primary device;

[0022] A verification module verifies the protection function status according to the current element information, including: if the verification result is that the status is consistent, the protection function operates normally; if the verification result is that the status is inconsistent, the protection function operates abnormally;

[0023] The early warning module generates early warning information of the element corresponding to the abnormal operation of the function to issue an early warning if the protection function operates abnormally.

[0024] Optionally, the elements include:

[0025] Control words, soft pressure plate, functional hard pressure plate and export pressure plate.

[0026] Optionally, if the warning information includes:

[0027] Anomaly type, risk description, risk level and response strategy.

[0028] Optionally, the current element information includes:

[0029] Control word setting, soft pressure plate setting, functional hard pressure plate setting and export pressure plate setting.

[0030] Optionally, the period of the periodic inspection includes: between 20:00 on the current day and 7:00 on the next day.

[0031] The beneficial effects of this application are:

[0032] The present application provides a method for early warning of the risk of the operating status of a relay protection function, including: obtaining the real-time operating status of each element in the relay protection device and the fixed value of each element for periodic inspection; if the operating status changes or the fixed value is inconsistent with the preset value, obtaining the current element information of each element from the relay protection device; determining the protection function status of the relay protection device through a device operation mode; verifying the protection function status according to the current element information, including: if the verification result is that the status is consistent, the protection function operates normally; if the verification result is that the status is inconsistent, the protection function operates abnormally; if the protection function operates abnormally, generating early warning information of the element corresponding to the abnormal function operation for early warning. The present application realizes the inspection and alarm of daily and sudden fault events through relay device element fixed value detection and periodic detection and dual trigger detection, which can effectively avoid causing power grid failures or accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the risk warning process of the operating status of the relay protection function in this application;

[0034] Figure 2 It is a schematic diagram of the business data flow in this application;

[0035] Figure 3 It is a schematic diagram of the information extraction flow chart in this application. DETAILED DESCRIPTION

[0036] The present application is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present application and implement it.

[0037] In the operation of the power system, the correctness and reliability of the functions of relay protection equipment as the guardian of the safe and stable operation of the power grid are of vital importance. In order to promptly discover and solve problems that may exist in relay protection equipment, this application provides a relay protection function operation status risk warning method, which realizes comprehensive and efficient status monitoring and risk warning of relay protection equipment through the comprehensive application of real-time monitoring, periodic inspection, intelligent analysis and other technical means.

[0038] Please refer to Figure 1 , Figure 2 and Figure 3 As shown, a method for early warning of the risk of the operating state of a relay protection function comprises the following steps:

[0039] S101. Obtain the real-time operating status of each element in the relay protection device and the set value of each element during periodic inspection.

[0040] Real-time status monitoring:

[0041] In the daily operation of the power system, the state changes of various elements in the relay protection equipment (such as soft pressure plates, hard pressure plates, control words, fixed values, etc.) directly reflect the health and operating status of the equipment. Therefore, this method first obtains the current operating status of these elements in real time through the relay protection information management system (such as SCADA system, security master station, etc.). These status information include but are not limited to the activation and deactivation status of the pressure plate, the setting value of the fixed value, the configuration of the control word, etc., which provide basic data support for subsequent inspections and early warnings.

[0042] Periodic inspection plan:

[0043] In addition to real-time status monitoring, in order to more comprehensively grasp the operating status of the relay protection equipment, a periodic inspection plan is also set. Periodic inspection is the process of regularly checking and verifying the fixed values ​​of each element of the relay protection equipment, aiming to discover and correct fixed value offsets or errors caused by time accumulation or external factors. The setting of the inspection cycle takes into account factors such as the importance of the equipment, the complexity of the operating environment, and the workload of the operation and maintenance personnel. In order to reduce the occupancy of the channel bandwidth and the impact on the normal work of the operation and maintenance personnel, this application recommends setting the inspection cycle between 20:00 on the same day and 7:00 on the next day to avoid the normal operating time period of the operation and maintenance personnel, and reduce the call frequency by adjusting the periodic time interval of the periodic inspection.

[0044] Special inspection arrangements:

[0045] For newly commissioned important substations or important load intervals after maintenance, since their operating status and setting values ​​may be more complex and sensitive, the patrol frequency is adjusted to strengthen their monitoring and inspection. This helps to timely discover and correct the abnormal operating status of the protection function caused by personnel operating the pressure plate and setting values, and improve the correctness and reliability of the operating status of the protection function.

[0046] S102: If the operating state changes or the set value is inconsistent with the preset value, obtain current element information of each element from the relay protection device.

[0047] In the real-time status monitoring process, once the operating status of the relay protection equipment is found to have changed (such as the pressure plate being put in and out, the set value being adjusted, etc.), the system should immediately trigger further information acquisition processes. This is because the status change is often closely related to the health status and operating risks of the equipment, and detailed information should be obtained in a timely manner for analysis and judgment.

[0048] At the same time, the fixed value obtained during the periodic inspection is also compared with the preset reference value. The reference value can be the set value when the equipment leaves the factory, or it can be a verified preset value. Through the comparison, it can be found whether there is an offset or error in the fixed value. If it is found that the fixed value is inconsistent with the preset value, the information acquisition process is also triggered for further analysis and processing.

[0049] Once a state change or a setting value that is inconsistent with the preset value is detected, the system will obtain the current detailed information of each relevant element from the relay protection device. This information includes but is not limited to the setting value, control word, soft pressure plate status, hard pressure plate status, etc. These detailed information provide comprehensive data support for subsequent protection function status judgment and risk warning.

[0050] S103: Determine the protection function status of the relay protection device through the operation mode of the primary device.

[0051] After obtaining the current element information of the relay protection device, the state of the protection function is determined according to the operation mode of the primary device. The operation mode of the primary device usually includes normal operation, abnormal operation and fault state. The changes in these states directly affect the action behavior of the relay protection device. For example, in normal operation, the relay protection device should be in a monitoring state and not send any action signal; in a fault state, the relay protection device needs to act quickly to isolate the fault area.

[0052] In order to accurately judge the status of the protection function, this application introduces the knowledge rules in the expert database. The expert database is built based on the design logic and operating experience of the equipment, and contains a lot of knowledge about the operating status and fault handling of relay protection equipment. By building a model of the protection function element and intelligently identifying the health status and reliability of the element, the correctness and reliability of the protection setting can be ensured. At the same time, by using the knowledge rules in the expert database to comprehensively analyze the operating mode of the primary equipment and the current element information of the relay protection equipment, it is possible to preliminarily judge whether the protection function status is normal.

[0053] S104. Verify the protection function status according to the current element information, including: if the verification result is that the status is consistent, the protection function operates normally; if the verification result is that the status is inconsistent, the protection function operates abnormally.

[0054] After the protection function status is determined, it is verified according to the current element information. The main purpose of the verification is to determine whether the status of the control word setting, soft pressure plate, functional hard pressure plate and outlet pressure plate is consistent with the protection function status. This is because the status of these elements directly determines the action behavior of the protection function. Only when the status of these elements is consistent with the protection function status can it be ensured that the relay protection device can operate correctly when a fault occurs.

[0055] The verification results are divided into two situations: one is that the status is consistent, that is, the status of the control word setting, soft pressure plate, functional hard pressure plate and outlet pressure plate is consistent with the protection function status. At this time, it is judged that the relay protection device is operating normally; the other is that the status is inconsistent, that is, there are situations where the status of some elements is inconsistent with the protection function status. At this time, it is considered that the function is operating abnormally.

[0056] S105: If the protection function operates abnormally, generate warning information of the element corresponding to the abnormal operation of the function to issue a warning.

[0057] After detecting abnormal operation of the protection function, timely and accurate generation of warning information is crucial to ensure the safe and stable operation of the power grid. This application realizes the generation and release of warning information through the following steps:

[0058] Once it is determined that the protection function is operating abnormally, the warning information is automatically generated based on the current element information and the knowledge rules in the expert database. The content of the warning information should be comprehensive, accurate, and targeted, and can clearly reflect the specific situation of the abnormal operation of the protection function. Specifically, the warning information should include the following aspects:

[0059] Warning risk description: A detailed description of the specific phenomena and possible impacts of abnormal operation of the protection function, such as "the control word setting state of the relay protection device is abnormal and fails, which may result in failure to operate correctly in a fault condition."

[0060] Risk level: Risks are graded according to the nature and severity of abnormal operation of protection functions. Risk levels are usually divided into two levels: severe and abnormal, so that operation and maintenance personnel can take corresponding countermeasures according to the risk level.

[0061] Response strategy: Provide preliminary response strategies or suggestions for the warning risk, such as "Please immediately check and restore the normal state of the control word setting, and at the same time strengthen the monitoring of the protection device."

[0062] The format of the specific warning information example provided in this application is as shown in Table 1:

[0063] Table 1

[0064]

[0065] After the warning information is generated, it is promptly released to relevant personnel through various channels. The system interface is one of the most direct release channels, where the warning information can be intuitively displayed to remind the operation and maintenance personnel to pay attention. In addition, the warning information can also be sent to relevant personnel through communication tools such as SMS, email, and WeChat to ensure timely transmission and effective reception of information.

[0066] The present application also provides a relay protection function operation status risk warning device, comprising:

[0067] Acquisition module, which obtains the real-time operating status of each element in the relay protection equipment and the fixed value of each element during periodic inspection;

[0068] A judgment module, if the operating state changes or the set value is inconsistent with the preset value, obtains the current element information of each element from the relay protection device;

[0069] An identification module determines the protection function status of the relay protection device through the operation mode of the primary device;

[0070] A verification module verifies the protection function status according to the current element information, including: if the verification result is that the status is consistent, the protection function operates normally; if the verification result is that the status is inconsistent, the protection function operates abnormally;

[0071] The early warning module generates early warning information of the element corresponding to the abnormal operation of the function to issue an early warning if the protection function operates abnormally.

[0072] Furthermore, the elements include:

[0073] Control words, soft pressure plate, functional hard pressure plate and export pressure plate.

[0074] Furthermore, if the warning information includes:

[0075] Anomaly type, risk description, risk level and response strategy.

[0076] Furthermore, the current element information includes:

[0077] Control word setting, soft pressure plate setting, functional hard pressure plate setting and export pressure plate setting.

[0078] Furthermore, the period of the periodic inspection includes: between 20:00 on the current day and 7:00 on the next day.

[0079] In the future, with the continuous development of smart grid and Internet of Things technology, the risk warning method of relay protection function operation status will also be continuously upgraded and improved. For example, more advanced sensors and monitoring equipment can be introduced to achieve more refined monitoring of relay protection equipment; more intelligent analysis models can be built to improve the accuracy and timeliness of warning information; and big data and artificial intelligence technology can be combined to conduct in-depth mining and analysis of power grid operation data, providing more comprehensive and scientific decision-making support for the safe and stable operation of the power grid.

[0080] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

[0081] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A risk warning method for the operation status of relay protection function, It is characterized in that include: Obtain the real-time operating status of each element in the relay protection equipment and the fixed value of each element during periodic inspection; If the operating state changes or the set value is inconsistent with the preset value, obtaining current element information of each element from the relay protection device; Determining the protection function status of the relay protection device through the operation mode of the primary device; Verifying the protection function status according to the current element information, including: if the verification result is that the status is consistent, the protection function operates normally; if the verification result is that the status is inconsistent, the protection function operates abnormally; If the protection function operates abnormally, warning information of the element corresponding to the abnormal operation of the function is generated for warning.

2. According to the relay protection function operation status risk early warning method of claim 1, It is characterized in that The elements include: Control words, soft pressure plate, functional hard pressure plate and export pressure plate.

3. According to the relay protection function operation status risk early warning method of claim 1, It is characterized in that If the warning information includes: Anomaly type, risk description, risk level and response strategy.

4. According to the relay protection function operation status risk early warning method of claim 1, It is characterized in that The current element information includes: Control word setting, soft pressure plate setting, functional hard pressure plate setting and export pressure plate setting.

5. According to the relay protection function operation status risk early warning method of claim 1, It is characterized in that The period of the periodic inspection includes: between 20:00 on the current day and 7:00 on the next day.

6. A relay protection function operation status risk warning device, It is characterized in that include: Acquisition module, which obtains the real-time operating status of each element in the relay protection equipment and the fixed value of each element during periodic inspection; A judgment module, if the operating state changes or the set value is inconsistent with the preset value, obtains the current element information of each element from the relay protection device; An identification module determines the protection function status of the relay protection device through the operation mode of the primary device; An analysis module, for verifying the protection function status according to the current element information; The verification module includes: if the verification result is that the status is consistent, the protection function operates normally; if the verification result is that the status is inconsistent, the protection function operates abnormally; The early warning module generates early warning information of the element corresponding to the abnormal operation of the function to issue an early warning if the protection function operates abnormally.

7. According to claim 6, the relay protection function operation status risk warning device, It is characterized in that The elements include: Control words, soft pressure plate, functional hard pressure plate and export pressure plate.

8. According to claim 6, the relay protection function operation status risk warning device, It is characterized in that If the warning information includes: Anomaly type, risk description, risk level and response strategy.

9. According to claim 6, the relay protection function operation status risk warning device, It is characterized in that The current element information includes: Control word setting, soft pressure plate setting, functional hard pressure plate setting and export pressure plate setting.

10. According to claim 6, the relay protection function operation status risk warning device, It is characterized in that The period of the periodic inspection includes: between 20:00 on the current day and 7:00 on the next day.

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