Grid Fault Diagnosis System and Its Method Based on Relay Protection Auxiliary Decision-Making System
A technology for assisting decision-making and power grid faults. It is applied in fault location, information technology support system, and fault detection by conductor type. It can solve problems such as affecting the efficiency of auxiliary decision-making support for relay protection, weak protection device information, and increasing management burden. Achieve quick response to line faults, eliminate misjudgments and missed judgments of line faults, and complete analysis reports.
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Embodiment 1
[0055] Such as figure 1 As shown, the wave recording master station is hung with multiple wave recording devices, and the wave recording device collects disturbance information on the line. The disturbance information includes fault information and non-fault information, and sends the disturbance information to the wave recording master station. The wave recording master station Based on the analysis of the disturbance information, it is judged whether the disturbance information is fault information. If it is judged to be non-fault information, record the non-fault information; Such as image 3 As shown, the wave recording fault analysis report includes the name of the fault line, fault time, fault type, tripping time, reclosing time, fault distance measurement, and the changes of related voltage and current before and after the fault, the general protection action exit and the position change of the circuit breaker, etc. information. The biggest difference between it and t...
Embodiment 2
[0069] On the basis of Example 1, such as Figure 5 As shown, this embodiment provides the specific steps of S3:
[0070] S101. After the Baoxin master station receives the fault verification request from the wave recording master station, it matches the protection fault analysis report requested by the wave recording master station in the protection fault analysis report cache report organized by itself;
[0071] If the matching failure analysis report is successful, the Baoxin master station will send a confirmation report to the recording master station, and the confirmation report includes the protection failure analysis report selected after the matching is successful;
[0072] If the matching fault analysis report fails, Baoxin master station will send a denial report to the recording master station, and the denial report does not contain any protection fault analysis report;
[0073] S102. If the wave recording master station receives a denial report, it is determined ...
Embodiment 3
[0084] On the basis of Embodiment 2, this embodiment provides a specific matching process. In this embodiment, the matching means include a time-correlation method based on the fault moment, or a comparison method of initial wave head feature quantities.
[0085] Further preferably, the specific steps of the time-related method include: taking the failure time given by the wave recording master station as a benchmark, relaxing 15 seconds forward and backward respectively, generating a comparison time window, and looking for the cached report of the Baoxin master station within the time window If a unique report is found for the protection fault analysis report in , the matching is successful; otherwise, continue to use the characteristic quantity comparison method to find the report.
[0086] Further preferably, the specific steps of the initial wave head feature quantity comparison method include:
[0087] S201. Taking the failure time given by the wave recording master stat...
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