Low-voltage distribution network protection method based on wide-area measurement information and medium

Abstract

The invention discloses a low-voltage distribution network protection method based on wide-area measurement information and a medium, and relates to the field of power systems and automation thereof.The invention aims at the defects of fault identification and positioning of the existing power distribution network, and the technical problem of insufficient reliability of the existing power distribution network on-line monitoring and protection method is solved by utilizing a current differential principle. The method comprises the steps of: constructing a topological structure incidence relation matrix R, a measurement unit remote control function on-off matrix B, a transformer transmission coefficient correction matrix D, a measurement voltage matrix U and a measurement current matrix I;forming a fault position research criterion; positioning a fault position on an element; determining a fault phase, and constructing an associated circuit breaker tripping strategy after the fault onthe basis of the remote control function on-off matrix B . The fault location in the power distribution network can be accurately judged, and the operation maintenance level of the power distributionnetwork is improved.

Description

technical field [0001] The invention relates to the field of electric power system and automation thereof, in particular to a low-voltage distribution network protection method and medium based on wide-area measurement information. Background technique [0002] The 35kV and below voltage level distribution network is the power supply system for most cities and rural areas, and plays a vital role in ensuring the production of all walks of life and people's lives. At present, the power supply loss of power distribution system is large, the degree of automation is low, and the fault recovery is slow, which seriously affects the reliability of power supply. In addition, with the continuous maturity of power electronics technology and new energy generation technology, more and more distributed power sources are connected to the distribution network, which greatly increases the complexity of the distribution network system. The traditional distribution network is a single power s...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of existing distribution network fault identification and positioning, the present invention proposes a low-voltage distribution network protection method and medium based on wide-area measurement information based on the wide-area measurement data of the distribution automation platform and the principle of current differential. Solving the technical problems of insufficient reliability of the existing distribution network online monitoring and protection methods

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