Local correction power flow calculation method applied to large-scale distribution network

Abstract

The invention relates to a local correction power flow calculation method applied to a large-scale distribution network, which belongs to the field of power system analysis. The method comprises steps: network initialization is firstly carried out, a to-be-retopologized feeder array and a re-power flow calculation array are built, the arrays are initialized into empty arrays, and local topology and local power flow calculation are carried out according to different events; and whether local topology analysis needs to be carried out is judged by judging whether the to-be-retopologized feeder array is empty, and whether local power flow calculation needs to be carried out is judged by judging whether the re-power flow calculation array is empty. According to the method of the invention, features that the distribution network is partitioned and divided are made full use of; the local topology correction technology and the local power flow technology are introduced; problems that the large-scale distribution network power flow calculation consumes long time, and the response speed is slow are solved; switch operation, load adjustment and the like are integrated in a local feeder line, local topology analysis and measurement data updating are carried out for data updating, the calculation speed is improved, and the method of the invention is applicable to large-scale distribution network power flow calculation.

Description

technical field [0001] The invention belongs to the field of power system analysis, and in particular relates to a local correction power flow calculation method suitable for large-scale distribution networks. Background technique [0002] The power system generally includes the transmission network and distribution network of various voltage levels composed of power plants, transmission lines, substations, distribution lines and electrical equipment. It is a complex system with multiple voltage levels, which is more common in China. The AC voltage levels include 1000kV, 500kV, 330kV, 220kV, 110kV, 35kV, 20kV, 10kV, 6.3kV, 380V. In the AC voltage level, 1kV and below are usually called low voltage, above 1kV and below 20kV are called medium voltage, above 20kV and below 330kV are called high voltage, 330kV and above and below 1000kV are called ultra high voltage, and above 1000kV are called UHV. Generally speaking, the voltage lines above 35kV are called transmission lines...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the deficiencies of the prior art, and to propose a local correction power flow calculation method suitable for large-scale distribution networks. This method introduces local topology correction and local Power flow technology solves the time-consuming and slow response problems of large-scale distribution network power flow calculations. The power flow algorithm based on this invention can concentrate the analysis of switch operations and load adjustments on local feeders, and at the same time update data (measurement data and switch Remote signaling), which can perform local topology analysis and measurement data update, thereby increasing the calculation speed, and can be applied to the power flow calculation of large-scale distribution networks

Images