Branch current detection method and system of double-bus distribution equipment parallel outlet wires

Abstract

The invention relates to a branch current detection method and system of double-bus distribution equipment parallel outlet wires. The branch current detection method of the double-bus distribution equipment parallel outlet wires comprises the following steps: detecting corresponding breaker states and knife states of buses and each outlet wire, wherein the breaker states and the knife states comprise closing states and opening states; respectively detecting bus currents and currents of each outlet wire; and according to the breaker states, the knife states, the bus currents and the currents of each outlet wire, detecting current values of two branches of the parallel outlet wires, wherein the parallel wires refer to the outlet wires whose bus knives are both closed, and currents of the parallel outlet wires are divided into the two branches at an output end. According to the invention, the current values of the two branches of the parallel outlet wires in double-bus distribution equipment can be accurately detected, subsequent current distribution of a correlation loop of the double-bus distribution equipment is conveniently carried out based on the detected current values of the two branches of the parallel outlet wires, and the safety of the double-bus distribution equipment is improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a branch current detection method and system for double-bus power distribution equipment with parallel lines. Background technique [0002] For substation dual-bus power distribution equipment, when the bus is reversed by "closing first and then pulling", there are reasons such as poor closing of the knife switch and insufficient insertion depth of the GIS bus connector, poor contact, excessive contact resistance, or even open circuit. When the knife switch is opened, it will cause the load to pull the knife switch, there is a risk of short circuit of the busbar, and a serious accident of voltage loss of two sections of the busbar will occur. [0003] Double-bus power distribution equipment generally includes two bus bars, each bus bar corresponds to several outgoing lines, and the current of each outgoing line will be divided into two branches at its output end; among th...

AI Technical Summary

Problems solved by technology

[0004] The detection of the branch current of the double-bus power distribution equipment in parallel is of great significance to the current distribution of the related loops of the double-bus power distribution equipment. The existing technology can only detect the current of each outgoing line, and it is difficult to detect the branch current of the double-bus power distribution equipment in parallel.

Images