A method for establishing a substation protection and monitoring system coordination index system

Abstract

The application discloses a method for establishing a transformer substation protection and monitoring system coordination index system, and relates to the technical field of power system operation control, and comprises the following steps: establishing a vertical business coordination index system of the transformer substation protection and monitoring system, establishing a horizontal business coordination index system of the transformer substation protection and monitoring system, establishing a station internal business coordination index system of the transformer substation protection and monitoring system, and combining the vertical business coordination index system, the horizontal business coordination index system and the station internal business coordination index system of the transformer substation protection and monitoring system. The method provided by the application can establish a comprehensive and suitable evaluation index system, which is used for evaluating the independent coordination performance of the transformer substation protection and monitoring system adopting an independent controllable chip and an operating system, and provides a basis for constructing the independent controllable transformer substation protection and monitoring system, so that the system performance is continuously improved, and the purpose of improving the system architecture is achieved.

Description

Technical Field

[0001] This invention relates to the field of power system operation and control technology, and in particular to a method for establishing a collaborative index system for substation protection and monitoring systems. Background Technology

[0002] Power grid security is crucial to national security. Substations are the hubs of energy flow, business flow, and data flow within the power grid. As the core infrastructure of substations, protection and monitoring systems bear the heavy responsibility of information collection, real-time monitoring, operation control, and fault isolation, making them vital for the safe and stable operation of the power grid. Although my country's domestically developed chips and operating systems have progressed rapidly, due to technological limitations, over 95% of the core chips used in substation protection and monitoring systems still rely on imports, and most operating systems are foreign, posing information security risks and seriously threatening the safe and stable operation of the large power grid. Therefore, there is an urgent need to establish an independent and controllable substation protection and monitoring system. However, with the application of domestically developed and controllable chips and operating systems, the coordination of substation protection and monitoring systems may be affected. Therefore, establishing an independent coordination index system for substation protection and monitoring systems using domestically developed and controllable chips and operating systems is of great practical significance for identifying system weaknesses and improving system architecture. Summary of the Invention

[0003] The purpose of this invention is to provide a method for establishing a collaborative index system for substation protection and monitoring systems. This method establishes a comprehensive and suitable evaluation index system to evaluate the collaborative performance of substation protection and monitoring systems using independently controllable chips and operating systems. This provides a basis for building independently controllable substation protection and monitoring systems, thereby continuously improving system performance and achieving the goal of improving system architecture.

[0004] To achieve the above objectives, this invention provides a method for establishing a collaborative index system for substation protection and monitoring systems, comprising the following steps:

[0005] S1. Establish a vertical business synergy indicator system for the substation protection and monitoring system;

[0006] S2. Establish a horizontal business collaboration indicator system for the substation protection and monitoring system;

[0007] S3. Establish an internal business collaboration indicator system for the substation protection and monitoring system;

[0008] S4. Combine the vertical business synergy, horizontal business synergy, and intra-station business synergy indicator systems of the substation protection and monitoring system.

[0009] Preferably, in step S1, vertical business collaboration refers to business collaboration between substations and centralized control stations, oriented towards substation equipment monitoring.

[0010] Preferably, in step S1, the vertical business coordination of the substation protection and monitoring system is measured by four indicators: remote operation data satisfaction, remote monitoring data satisfaction, transmission data protocol satisfaction, and master-slave fault collaborative resolution time.

[0011] Preferably, in step S2, horizontal business synergy refers to business interaction and synergy between safety zones within a substation.

[0012] Preferably, the horizontal business synergy index system in step S2 is measured by three indicators: cross-regional primary and secondary business transmission time, cross-regional multi-system device linkage time, and cross-regional data transmission satisfaction.

[0013] Preferably, the in-station business coordination index system in step S3 is measured by four indicators: remote signaling change transmission time, telemetry exceedance transmission time, remote control command execution transmission time, and remote adjustment command transmission time, as well as two indicators for data transmission: in-station data transmission satisfaction and in-station functional satisfaction.

[0014] Preferably, the remote operation data satisfaction formula is as follows:

[0015]

[0016] In the formula, A7 - number of data types transmitted: the number of data that has been transmitted; B7 - expected number of encrypted data items: the number of data required to be transmitted in the requirements; E - the metric value corresponding to B7, with a value of 0.6;

[0017] The formula for the satisfaction of the remote monitoring data is as follows:

[0018]

[0019] In the formula, A8 - number of data types transmitted: the number of data that has been transmitted; B8 - expected number of encrypted data items: the number of data required to be transmitted in the requirements; E - the metric value corresponding to B8, with a value of 0.6;

[0020] The data transmission protocol satisfaction formula is as follows:

[0021]

[0022] In the formula, A9 is the number of data types transmitted: the number of data that has been transmitted; B9 is the expected number of encrypted data items: the number of data that is required to be transmitted in the requirements; E is the metric value corresponding to B9, with a value of 0.6.

[0023] Preferably, the cross-regional data transmission satisfaction formula is as follows:

[0024]

[0025] In the formula, A 10 - Number of transmitted data types: The measured amount of data that has been transmitted; B 10 - Expected number of encrypted data items: The amount of data required to be transmitted in the requirement; E- and B 10 The corresponding metric value is 0.6.

[0026] Preferably, the satisfaction formula for the intra-station data transmission is as follows:

[0027]

[0028] In the formula, A 11 - Number of transmitted data types: The measured amount of data that has been transmitted; B 11 - Expected number of encrypted data items: The amount of data required to be transmitted in the requirement; E- and B 11 The corresponding metric value is 0.6;

[0029] The formula for satisfying the functional requirements within the station is as follows:

[0030]

[0031] In the formula, A 12 - Number of functional types implemented: Measured number of application functions that can be implemented; B 12 - Expected number of encrypted data items: The number of functionalities required to be implemented in the requirements; E- and B 12 The corresponding metric value is 0.6.

[0032] Therefore, this invention provides a method for establishing a collaborative index system for substation protection and monitoring systems. The established evaluation index system is comprehensive, highly operable, and easy to implement, providing a basis for building an independent and controllable substation protection and monitoring system, improving system performance, and achieving the goal of improving system architecture.

[0033] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0034] Figure 1 This is a schematic diagram illustrating the process of establishing a collaborative index system for a substation protection and monitoring system, as provided by the present invention.

[0035] Figure 2 This is a comparison chart of the collaborative index scores of different substations in an embodiment of the method for establishing a collaborative index system for substation protection and monitoring provided by the present invention. Detailed Implementation

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] The following detailed description of embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] Example

[0039] As attached Figure 1 The diagram shows a flowchart illustrating the establishment process of a collaborative index system for substation protection and monitoring provided by the present invention. The method includes:

[0040] S1. Establish a vertical business synergy index system for the substation protection and monitoring system.

[0041] The synergy of a protection and monitoring system mainly refers to "work synergy," which means the system's ability to coordinate two or more different resources or individuals to achieve a certain goal in a coordinated manner.

[0042] For substation protection and monitoring systems, the overall coordination is measured by dividing coordination into three aspects: vertical coordination, horizontal coordination, and intra-station coordination.

[0043] 1) Vertical business collaboration:

[0044] ① Definition: Primarily refers to the collaborative monitoring of equipment between substations and centralized control stations;

[0045] ② Function of the indicator: to measure the degree to which inter-station collaborative monitoring, collaborative early warning, and collaborative verification meet the requirements.

[0046] 2) Horizontal business collaboration:

[0047] ① Definition: This refers to the business interaction and collaboration between multiple safety zones within a substation, such as data interaction between main equipment and auxiliary equipment; video linkage between the production control zone and the management information zone during control operations;

[0048] ② Function of the indicator: To address the current situation of isolated horizontal data and poor correlation between business operations, and to measure the degree to which data transmission between different cross-regions within the station meets the requirements.

[0049] 3) In-site business collaboration:

[0050] ① Definition: Refers to the business interaction and collaboration between various devices within a substation;

[0051] ② Function of the indicator: To measure the degree to which the data transmission between the main equipment in the station meets the requirements.

[0052] Vertical business collaboration mainly refers to collaboration between substations and centralized control stations, focusing on substation equipment monitoring business collaboration to better support remote panoramic monitoring of equipment and better control the operating status of substation equipment.

[0053] Therefore, four indicators were selected to measure the vertical business synergy of the substation protection and monitoring system: remote operation data satisfaction, remote monitoring data satisfaction, transmission data protocol satisfaction, and master-slave station fault resolution time.

[0054] (1) Remote operation data satisfaction: The degree to which the remote operation data transmitted between substations meets the requirements, and its value is shown in equation (1):

[0055]

[0056] In the formula, A7 - Number of transmitted data types: the amount of data that has been measured and transmitted;

[0057] B7 - Expected number of encrypted data items: The amount of data required to be transmitted in the requirement;

[0058] The appropriate value for the metric corresponding to E- and B7 is 0.6.

[0059] (2) Satisfaction of remote monitoring data: The degree to which the remote monitoring data transmitted between substations meets the requirements, and its value is shown in equation (2):

[0060]

[0061] In the formula, A8 - number of data types transmitted: the amount of data that has been transmitted;

[0062] B8 - Expected number of encrypted data items: The amount of data required to be transmitted in the requirement;

[0063] The appropriate value for the metric corresponding to E- and B8 is 0.6.

[0064] (3) Data transmission protocol satisfaction: The degree to which the data transmission protocol between substations meets the requirements, and its value is shown in equation (3):

[0065]

[0066] In the formula, A9 - number of data types transmitted: the amount of data that has been transmitted;

[0067] B9 - Expected number of encrypted data items: The amount of data required to be transmitted in the requirement;

[0068] The appropriate value for the metric corresponding to E- and B9 is 0.6.

[0069] (4) Collaborative resolution time for master and substation faults: The time required for the collaborative online monitoring and fault diagnosis system of master and substation to resolve faults from the discovery of faults.

[0070] S2. Establish a horizontal business collaboration indicator system for the substation protection and monitoring system.

[0071] Horizontal business collaboration refers to the business interaction and collaboration between multiple safety zones within a substation, such as data interaction between main equipment and auxiliary equipment; video linkage between the production control area and the management information area during control operations; its purpose is to solve the current situation of isolated horizontal data and poor correlation between businesses, and to improve the level of substation equipment management.

[0072] Therefore, three indicators were selected to measure the horizontal business synergy of the substation protection and monitoring system: cross-regional primary and secondary business transmission time, cross-regional multi-system equipment linkage time, and cross-regional data transmission satisfaction.

[0073] (1) Cross-regional primary and secondary business transmission time: The time required for cross-regional primary and secondary equipment to coordinate and link services (e.g., data interaction between primary and secondary equipment), from sending a service from one device to receiving the linkage result from another device.

[0074] (2) Cross-regional multi-system equipment linkage time: The time required for the action of one device to trigger the action of another device in the coordinated linkage of cross-regional multi-system equipment.

[0075] (3) Cross-regional data transmission satisfaction: The degree to which cross-regional data transmission within a substation meets the requirements, and its value is shown in equation (4):

[0076]

[0077] In the formula, A 10 - Number of transmitted data types: The amount of data that has been transmitted;

[0078] B 10 - Expected number of encrypted data items: The amount of data required to be transmitted in the requirements;

[0079] E- and B 10 The corresponding metric value should ideally be 0.6.

[0080] S3. Establish a business collaboration indicator system for the substation protection and monitoring system.

[0081] The main business inside the substation is data business. Therefore, we mainly select four indicators for the "four remote" system: remote signaling change transmission time, telemetry over-set value transmission time, remote control command execution transmission time, and remote adjustment command transmission time. We also select two indicators for data transmission: the satisfaction of data transmission within the station and the satisfaction of functions implemented within the station. A total of six indicators are used to measure the inter-station business coordination of the protection and monitoring system.

[0082] (1) Remote signaling change transmission time: refers to the time from the remote signaling input terminal to the station control layer receiving equipment and the remote communication workstation output.

[0083] (2) Telemetry transmission time exceeding the set value: refers to the time from the telemetry input terminal to the station control layer receiving equipment and the remote communication workstation output.

[0084] (3) Remote command execution transmission time: refers to the time from when the remote command is issued from the station control layer workstation to when the control output contact of the control equipment takes action.

[0085] (4) Remote adjustment command transmission time: refers to the time from when the remote adjustment command is issued from the station control layer workstation to when the command is executed.

[0086] (5) Data satisfaction within the substation: Data satisfaction within the substation refers to the degree to which the data types transmitted within the substation meet the requirements, and its value is shown in equation (5):

[0087]

[0088] In the formula, A 11 - Number of transmitted data types: The amount of data that has been transmitted;

[0089] B 11 - Expected number of encrypted data items: The amount of data required to be transmitted in the requirements;

[0090] E- and B 11 The corresponding metric value should ideally be 0.6.

[0091] (6) Functional fulfillment within the substation: The degree to which the application functions of the substation meet the requirements, and its value is shown in equation (6):

[0092]

[0093] In the formula, A 12 - Number of functional types implemented: The number of application functions that can be implemented;

[0094] B 12 - Expected number of encrypted data items: The number of functionalities required to be implemented in the requirements;

[0095] E- and B 12The corresponding metric value should ideally be 0.6.

[0096] S4. The vertical business synergy index system, horizontal business synergy index system, and intra-station business synergy index system of the substation protection and monitoring system are shown in Table 1:

[0097] Table 1. Synergistic Index System for Substation Protection and Monitoring Systems

[0098]

[0099] S5. Select some indicators from the substation protection and monitoring system coordination index system, combine data from four substations, use the entropy method to calculate the index weights, conduct case analysis, and calculate the overall evaluation results of the four different substation indicators to verify the practical value of the substation protection and monitoring system coordination index.

[0100] Some of the selected indicators are shown in Table 2:

[0101] Table 2. Integration Indicators of Some Substation Protection and Monitoring Systems

[0102]

[0103] Historical data related to the performance level of the substation protection and monitoring system in a certain year were collected and organized for four substations to be evaluated. The original data of the calculation example is shown in Table 3.

[0104] Table 3. Raw statistical data of the third-level indicators

[0105] Remote operation data satisfaction X91 0.6 0.66 0.54 0.6 Remote monitoring data satisfaction X92 0.6 0.6 0.54 0.66 Master-subsite fault collaborative resolution time x93 2.1 1.7 2.5 0.9 Cross-regional primary and secondary service transmission time x101 0.7 1.1 0.5 1.5 Cross-regional multi-system device linkage time x102 2.8 2.6 3.1 3.4 Remote command transmission time X111 1.4 1.5 0.8 1.8 Remote command execution transmission time x112 1.3 1.1 0.9 1.8

[0106] The normalized values ​​of the data in Table 3 after standardization and dimensionless processing are shown in Table 4.

[0107] Table 4. Standardized values ​​of third-level indicators

[0108] Remote operation data satisfaction X91 0.9 1 0.8 0.9 Remote monitoring data satisfaction X92 0.9 0.9 0.8 1 Master-subsite fault collaborative resolution time x93 0.85 0.9 0.8 1 Cross-regional primary and secondary service transmission time x101 0.96 0.88 1 0.8 Cross-regional multi-system device linkage time x102 0.95 1 0.875 0.8 Remote command transmission time X111 0.88 0.86 1 0.8 Remote command execution transmission time x112 0.911111 0.955556 1 0.8

[0109] The weights of each indicator were calculated using the entropy method, as shown in Table 5.

[0110] Table 5. Weighting Results of Level 3 Indicators

[0111]

[0112] Substituting the index weights obtained from Table 5 into the normalized data in Table 4, we can obtain the overall score of the coordination of the protection and monitoring systems of each substation, as shown in Table 6.

[0113] Table 6 Overall score of the coordination of protection and monitoring systems in different substations

[0114] Overall score of synergy 0.904786 0.924802 0.89533 0.873833

[0115] Figure 2 A comparison chart of the coordination index scores of different substations in an embodiment of the method for establishing a coordination index system for a substation protection and monitoring system provided by the present invention, as shown in Table 6 and... Figure 2 As can be seen, when using the selected synergy indicators to score different substations, substation 2 performs best overall, while substation 4 performs the worst relatively overall. Therefore, the synergy indicator system for substation protection and monitoring systems can evaluate different substations to a certain extent, revealing the differences in synergy among them.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for establishing a collaborative index system for substation protection and monitoring systems, characterized in that, Includes the following steps: S1. Establish a vertical business synergy indicator system for substation protection and monitoring systems; Vertical business synergy refers to the business synergy between substations and centralized control stations, focusing on substation equipment monitoring. The vertical business collaboration of the substation protection and monitoring system is measured by four indicators: remote operation data satisfaction, remote monitoring data satisfaction, transmission data protocol satisfaction, and master-slave fault collaborative resolution time. S2. Establish a horizontal business collaboration indicator system for substation protection and monitoring systems; Horizontal business synergy refers to the business interaction and synergy between safety zones within a substation; The horizontal business synergy index system uses three indicators to measure cross-regional primary and secondary business transmission time, cross-regional multi-system equipment linkage time, and cross-regional data transmission satisfaction. S3. Establish a substation protection and monitoring system internal business coordination indicator system; The in-station business synergy index system consists of four indicators: remote signaling change transmission time, telemetry exceedance transmission time, remote control command execution transmission time, and remote adjustment command transmission time, as well as two indicators for data transmission: in-station data transmission satisfaction and in-station functional satisfaction. S4. Combining the vertical business coordination index system, the horizontal business coordination index system, and the intra-station business coordination index system of the substation protection and monitoring system; The remote operation data satisfaction formula is as follows: In the formula, A 7-Number of transmitted data types: The amount of data that has been transmitted; B 7- Expected number of encrypted data items: The amount of data required to be transmitted in the requirements; E -and B The corresponding metric value for 7 is 0.6; The formula for the satisfaction of the remote monitoring data is as follows: In the formula, A 8-Number of transmitted data types: The amount of data that has been transmitted; B 8- Expected number of encrypted data items: The amount of data required to be transmitted in the requirements; E -and B The corresponding metric value for 8 is 0.6; The data transmission protocol satisfaction formula is as follows: In the formula, A 9-Number of transmitted data types: The amount of data that has been transmitted; B 9- Expected number of encrypted data items: The amount of data required to be transmitted in the requirements; E -and B The metric value corresponding to 9 is 0.6; The cross-regional data transmission satisfaction formula is as follows: In the formula, A 10 - Number of transmitted data types: The amount of data that has been transmitted; B 10 - Expected number of encrypted data items: The amount of data required to be transmitted in the requirements; E -and B 10 The corresponding metric value is 0.6; The formula for satisfying the data transmission within the station is as follows: In the formula, A 11 - Number of transmitted data types: The amount of data that has been transmitted; B 11 - Expected number of encrypted data items: The amount of data required to be transmitted in the requirements; E -and B 11 The corresponding metric value is 0.6; The formula for satisfying the functional requirements within the station is as follows: In the formula, A 12 - Number of functional types implemented: The number of application functions that can be implemented; B 12 - Expected number of encrypted data items: The number of functionalities required to be implemented in the requirements; E -and B 12 The corresponding metric value is 0.6.

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