Automatic pull trial detection and control device for single-phase earth fault of power distribution network

Abstract

The invention provides an automatic pull trial detection and control device for a single-phase earth fault of a power distribution network. The device comprises a telemetry acquisition module, a remote signal acquisition module, a fault signal acquisition module, a logic judgment module, a policy control module and a policy execution module, which are connected with a central processing unit; when a bus has a single-phase earth fault, the fault signal acquisition module receives a signal, the central processing unit judges the fault, and the telemetry acquisition module and the remote signal acquisition module automatically acquire a voltage value of the monitored bus, an action signal of an arc suppression coil and a single-phase earth signal of the bus, and compare the data with the criteria set by the logic judgment module, to determine the property of the fault; the policy control module makes a control policy, and the policy execution module forms a remote control operation sequence according to the control policy, and pushes the remote control operation sequence to an automatic grid scheduling system for executing via a communication interface. The device adopting a technical support system for judging can be more accurate, and can shorten the fault line searching time, reduce the probability of misoperation and improve the fault processing efficiency.

Description

technical field [0001] The invention relates to an automatic test pull detection and control device for a single-phase grounding fault of a distribution network, which belongs to the field of electric power system automation. Background technique [0002] my country's distribution network is mainly grounded through arc-suppressing coils. After a single-phase ground fault occurs, because a short-circuit circuit cannot be formed, the fault current is small, and the power grid line voltage is symmetrical and can still supply power, but it needs to be tested in time through line testing. Find and isolate fault points, and restore power delivery as soon as possible. [0003] The existing faulty line troubleshooting method is that the dispatcher issues an order to conduct a manual test pull, and manually judges whether the voltage is restored, so as to determine the fault range. According to the current practice, it is not efficient for dispatchers to manually handle single-wire g...

AI Technical Summary

Problems solved by technology

According to the current practice, it is not efficient for dispatchers to manually handle single-wire ground faults

Because every operation of the dispatcher needs to go through the process of operation, monitoring, etc., an ordering operation takes about 2 minutes. If there are many lines on the bus, it will take longer to find the faulty line, and manual judgment is required. , It is highly dependent on the technical ability of personnel, and there are unsafe factors such as unreasonable sequence of pulling routes, manual operation errors, and wrong signal judgments.

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