Fault location method for medium and low voltage power distribution network

Abstract

The invention discloses a mid and low-voltage distribution network fault positioning method. The method comprises steps: 1, through a power consumption information acquisition system, a distribution line online monitoring system, a residual current operated protective device monitoring system, a dispatching automatic system, a distribution network automatic system and a production management system, power consumption information of the mid and low-voltage distribution network is acquired, the power consumption information of the mid and low-voltage distribution network is corrected through a power flow distribution algorithm, and the topological relationship of the mid and low-voltage distribution network is perfected; and 2, according to power loss information in the power consumption information of the mid and low-voltage distribution network, based on the topological relationship of the mid and low-voltage distribution network, fault study and judgment are carried out through a corresponding fault study and judgment algorithm, a fault device is determined, devices and users influenced by power failure are analyzed, and a geographic area influenced by power failure is generated when a power grid device and the geographic position information of power grid users are combined. The method of the invention has the advantages of high fault positioning precision and high power failure range judgment precision.

Description

technical field [0001] The invention relates to the field of power distribution network fault location. More specifically, the present invention relates to a fault location method for medium and low voltage power distribution networks. Background technique [0002] The traditional fault diagnosis method does not have a complete communication network and computer system. The medium voltage mainly relies on the mutual cooperation of equipment such as reclosers and sectionalizers when the system fails. When the fault is isolated, the impact on the equipment is large, and the non-fault area When the power supply is restored, the recovery method is relatively fixed, and the power outage lasts for a long time. It is difficult to balance economy and safety, and the fault handling process relies more on the dispatcher's experience. For faults on the low-voltage user side, it is necessary to receive a repair report from the user first, and then dispatch personnel to find the cause o...

AI Technical Summary

Problems solved by technology

Due to the large and complex structure of my country's medium and low-voltage power distribution network, incomplete power consumption information, and incomplete network topology relationships, existing fault diagnosis methods have high requirements for distribution network communication equipment and measurement equipment, and have high requirements for fault location and outage range determination. low precision

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