Method for positioning short-circuit fault of distribution network based on distributed intelligent multi-calibration

Abstract

The invention relates to a method for positioning a short-circuit fault of a distribution network based on distributed intelligent multi-calibration. The method comprises the following steps of: arranging a plurality of intelligent agents in the distribution network and establishing a modeled multilevel multi-verification short-circuit fault positioning rule for different operating modes of the distribution network; in the operation process of the distribution network, monitoring operation information of a local current distribution network in real time through each distributed intelligent agent; once the current is out of limit, sending a current out-of-limit signal to the directly-adjacent intelligent agent and a superior intelligent agent and checking whether a short-circuit fault early-warning signal exists locally; if so, assuring that the short-circuit fault happens locally; otherwise, waiting for receiving the current out-of-limit signal sent by the directly-adjacent intelligent agent; and after delaying the signal for time t, according to the local current out-of-limit signal and the received current out-of-limit signal, carrying out rule matching and multi-condition calibration to determine a fault diagnosis result by utilizing a local short-circuit fault positioning rule library and combining a wiring type of the distribution network and the position of the intelligent agent.

Description

technical field [0001] The invention belongs to the field of electric power systems and automation thereof, and in particular relates to a distribution network short-circuit fault location method based on distributed intelligent multiple calibration. Background technique [0002] As a common fault in the distribution network, if the short circuit fault is not located and isolated as soon as possible, it may cause serious accidents such as equipment burning and load loss. [0003] At present, most short-circuit faults rely on protection and circuit breakers in the distribution network to locate and isolate them. This method is not only limited by the switching speed, but also the protection and circuit breaker are prone to malfunction and refusal to operate. At the same time, the power loss range is too large, and the short-circuit fault located on the line section will often cause power loss on the entire line after being isolated by the protection action. In addition, in ...

AI Technical Summary

Problems solved by technology

However, in the actual operating environment, misjudgment may occur; at the same time, it needs to wait for the information sent by the adjacent agent, which takes a relatively long time, which affects the timeliness and accuracy of fault location to a certain extent.

Images