Method for checking relay protection operation of new energy station

Abstract

The invention discloses a new energy station relay protection operation checking method, and belongs to the technical field of relay protection operation checking, and the method comprises the steps: 1, a server builds a to-be-tested power grid model according to the structure of an actual to-be-tested power grid; step 2, acquiring real-time operation parameters of the to-be-tested power grid from the interaction module; the method has the beneficial effects that the management level of the relay protection constant value risk can be greatly improved through online checking of the relay protection constant value, the correctness and the safety of the actual operation constant value of a protection device are improved, the incorrect action of relay protection caused by the change of an operation mode is prevented, the risk caused by the relay protection constant value is avoided, and the safety of a power grid is ensured; according to the method, the existing setting calculation working mode of relay protection is changed, the scheduling decision level and the setting calculation level are improved, the development of relay protection specialty towards informatization, interaction and intelligence is promoted, and the reliability of relay protection operation and the safety of system operation can be greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection operation verification, and more specifically, to a method for relay protection operation verification of a new energy station. Background Art

[0002] The connotation of relay protection reliability includes two aspects: accuracy of protection setting and stability of protection device. The stability of protection device depends on the manufacturing quality of protection device itself, connection of protection circuit and operation and maintenance level, and can be improved by carrying out condition maintenance technology. In addition to reasonable setting calculation, the accuracy of protection setting also requires the cooperation of online verification technology. Real-time online verification can ensure that the protection setting items (setting value and action time) can be checked when the operation mode of the power grid changes, so that the setting can still maintain selectivity, sensitivity and speed.

[0003] Relay protection maintenance personnel set the setting values ​​item by item by operating the relay protection panel in the substation, and conduct manual verification and confirmation after setting. This mode not only takes up a lot of manpower and material resources, but also has low reliability of relay protection operation and system operation safety. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a method for checking the relay protection operation of a new energy station, which has the characteristics of greatly improving the reliability of relay protection operation and the safety of system operation.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a method for verifying the operation of relay protection in a new energy station, comprising: step 1, the server establishes a model of the power grid to be tested according to the structure of the actual power grid to be tested; step 2, obtaining the real-time operating parameters of the power grid to be tested from the interactive module, and sending the real-time data to the server, mapping it to the corresponding device of the power grid model to be tested for real-time analysis, and automatically monitoring the operating status of the power grid to be tested; step 3, when the online verification terminal detects that the operating status of the power grid to be tested has changed, a relay protection constant value verification request is sent to the server, and the server organizes parallel calculation parameters according to the verification task, and the relay protection constant value verification program is automatically started. action; Step 4, the server decomposes multiple parallel computing parameters according to the verification task, and assigns the parallel computing parameter tasks to different node processors to complete the parallel computing parameter node calculation; Step 5, the server receives and summarizes the calculation results of the parallel calculations of each node processor, forms the verification results and alarm information, and pushes the verification results and alarm information to the online verification terminal and the intelligent alarm terminal respectively; Step 6, based on the fault analysis calculation results, verifies whether the protection setting values ​​of the relay protection equipment of the power grid model to be tested are reasonable, and corrects the unreasonable protection setting values ​​of the relay protection equipment, so as to complete the online verification of the protection setting values ​​of the relay protection equipment in the power grid to be tested.

[0006] Preferably, in step 1, the modeling method for relay protection setting verification includes establishing a logical model of the relay protection device or the safety automatic device, and the logical model should include starting or locking elements, measuring elements, time elements related to the principle setting and the logical relationships between them.

[0007] Preferably, in step 4, parallel computing verifies the several independent computing units into which the computing tasks are decomposed respectively. These computing units undertake computing tasks of different types of data. The node processor processes these different types of data and computing tasks. The node processor sends the parallel computing results to the server. The server merges the results of each parallel computing task to form an overall verification task result. Through the real-time operation information of the power grid and the maintenance plan, the selectivity and sensitivity of the relay protection settings are analyzed, the weak links of the protection settings are analyzed, the protection coordination relationship is verified online, the setting adaptability is dynamically monitored, and the accuracy of the protection settings and the accuracy of the coordination relationship are improved.

[0008] Preferably, in step 5, according to the device characteristics, circular characteristics or quadrilateral characteristics, grounding distance calculation method and zero-sequence compensation system are considered, resistance components and reactance components are considered, and the setting of each section of the main protection and backup protection, the sensitivity and selectivity of the load avoidance, and the verification of the accident avoidance and overload capacity are fully realized.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention, by applying online verification of relay protection settings, can greatly improve the management level of relay protection setting risks, improve the correctness and safety of actual operating settings of protection devices, prevent incorrect relay protection operations caused by changes in operating modes, avoid risks brought by relay protection settings, ensure power grid safety, change the existing setting calculation working mode of relay protection, improve the dispatching decision-making level and setting calculation level, promote the development of relay protection profession towards informatization, interactivity and intelligence, and can greatly improve the reliability of relay protection operation and the safety of system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the drawings required for describing the specific implementation or the prior art will be briefly introduced below. Obviously, the drawings described below are only one implementation of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a structural schematic diagram of the online verification flow chart of the present invention. Implementation

[0012] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0013] See also Figure 1 The present invention provides the following technical solutions: A method for checking the operation of relay protection in a new energy station, comprising: step 1, a server establishes a model of a power grid to be tested according to the structure of the actual power grid to be tested; step 2, obtaining the real-time operating parameters of the power grid to be tested from the interactive module, and sending the real-time data to the server, mapping it to the corresponding device of the power grid model to be tested for real-time analysis, and automatically monitoring the operating status of the power grid to be tested; step 3, when the online verification terminal detects that the operating status of the power grid to be tested has changed, a relay protection constant value verification request is sent to the server, and the server organizes parallel calculation parameters according to the verification task, and the relay protection constant value verification program is automatically started; step In step 4, the server decomposes multiple parallel computing parameters according to the verification task, and assigns the parallel computing parameter tasks to different node processors to complete the parallel computing parameter node calculation; in step 5, the server receives and summarizes the calculation results of the parallel calculations of each node processor, forms the verification results and alarm information, and pushes the verification results and alarm information to the online verification terminal and the intelligent alarm terminal respectively; in step 6, according to the fault analysis calculation results, verifies whether the protection setting values ​​of the relay protection equipment of the power grid model to be tested are reasonable, and corrects the unreasonable protection setting values ​​of the relay protection equipment, so as to complete the online verification of the protection setting values ​​of the relay protection equipment in the power grid to be tested.

[0014] Specifically, in step 1, the modeling method for relay protection setting verification includes establishing a logical model of the relay protection device or the safety automatic device. The logical model should include starting or locking elements, measuring elements, time elements related to the principle setting and the logical relationships between them.

[0015] Specifically, in step 4, parallel computing verifies the several independent computing units decomposed into the computing tasks respectively. These computing units undertake computing tasks of different types of data. The node processor processes these different types of data and computing tasks. The node processor sends the parallel computing results to the server. The server merges the results of each parallel computing task to form an overall verification task result. Through the real-time operation information of the power grid and the maintenance plan, the selectivity and sensitivity of the relay protection setting are analyzed, the weak links of the protection setting are analyzed, the protection coordination relationship is verified online, the setting adaptability is dynamically monitored, and the accuracy of the protection setting and the accuracy of the coordination relationship are improved.

[0016] Specifically, in step 5, according to the device characteristics, circular characteristics or quadrilateral characteristics, grounding distance calculation method and zero-sequence compensation system are considered, resistance components and reactance components are considered, and the setting of each section of the main protection and backup protection, the sensitivity and selectivity of the load avoidance, and the verification of the accident avoidance and overload capacity are fully realized.

[0017] The working principle and use process of the present invention: The present invention, by applying online verification of relay protection settings, can greatly improve the management level of relay protection setting risks, improve the correctness and safety of actual operating settings of protection devices, prevent incorrect relay protection operations caused by changes in operating modes, avoid risks brought by relay protection settings, ensure power grid safety, change the existing setting calculation working mode of relay protection, improve the dispatching decision-making level and setting calculation level, promote the development of relay protection profession towards informatization, interactivity and intelligence, and can greatly improve the reliability of relay protection operation and the safety of system operation.

[0018] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for checking relay protection operation of a new energy station, comprising: Step 1: The server establishes a model of the power grid to be tested according to the structure of the actual power grid to be tested; Step 2, obtaining the real-time operating parameters of the power grid to be tested from the interactive module, and sending the real-time data to the server, mapping it to the corresponding device of the power grid model to be tested for real-time analysis, and automatically monitoring the operating status of the power grid to be tested; Step 3: When the online verification terminal detects that the operating state of the power grid to be tested has changed, it sends a relay protection setting value verification request to the server. The server organizes parallel calculation parameters according to the verification task, and the relay protection setting value verification program is automatically started; Step 4: The server decomposes multiple parallel computing parameters according to the verification task, and assigns the parallel computing parameter tasks to different node processors to complete the parallel computing parameter node calculation; Step 5: The server receives and summarizes the calculation results of the parallel calculations of each node processor to form a verification result and an alarm information, and pushes the verification result and the alarm information to the online verification terminal and the intelligent alarm terminal respectively; Step 6: Check whether the protection setting value of the relay protection equipment of the power grid model to be tested is reasonable according to the fault analysis calculation results, and correct the unreasonable protection setting value of the relay protection equipment to complete the online verification of the protection setting value of the relay protection equipment in the power grid to be tested.

2. The method for verifying relay protection operation of a new energy station according to claim 1 is characterized in that: In step 1, the modeling method for relay protection setting verification includes establishing a logical model of the relay protection device or the safety automatic device. The logical model should include starting or locking elements, measuring elements, time elements related to the principle setting and the logical relationships between them.

3. The method for verifying relay protection operation of a new energy station according to claim 1 is characterized in that: In step 4, parallel computing verifies the several independent computing units decomposed into the computing tasks respectively. These computing units undertake computing tasks of different types of data. The node processor processes these different types of data and computing tasks. The node processor sends the parallel computing results to the server. The server combines the results of each parallel computing task to form an overall verification task result. Through the real-time operation information of the power grid and the maintenance plan, the selectivity and sensitivity of the relay protection setting are analyzed, the weak links of the protection setting are analyzed, the protection coordination relationship is verified online, the setting adaptability is dynamically monitored, and the accuracy of the protection setting and the accuracy of the coordination relationship are improved.

4. The method for verifying relay protection operation of a new energy station according to claim 1 is characterized in that: In step 5, according to the device characteristics, circular characteristics or quadrilateral characteristics, grounding distance calculation method and zero-sequence compensation system are considered, resistance components and reactance components are considered, and the setting of each section of the main protection and backup protection, the sensitivity and selectivity of the load avoidance, and the verification of the accident avoidance and overload capacity are fully realized.

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