Quantitative analysis method for toughness of intelligent power distribution network containing various types of loads in sandstorm weather

Abstract

The invention relates to a quantitative analysis method for toughness of an intelligent power distribution network containing various types of loads in sandstorm weather. The method comprises the following steps of simulating a sandstorm wind field and obtaining the wind speed of each point, calculating the load effect of a power distribution network according to the wind speed and the wind direction, respectively obtaining the fault rate of a power distribution network line and the fault rate of a tower, calculating the fault rate of a power distribution network overhead line, and obtaining afault scene of the power distribution network at a certain moment in the extreme weather; giving different weights to various levels of loads according to the importance of the loads; judging whethera system line is overloaded or not after a fault occurs, and implementing a load shedding measure on a current load when the line is overloaded; calculating the load reduction amount of the current scene according to the weight, sequentially completing calculation of the load loss of each time period, then calculating the average comprehensive load reduction of the load, and calculating a toughness index of the power distribution network. According to the method, a problem of high electric energy supply pressure in the windy and dusty weather is better solved, and disaster resistance of the power distribution network is effectively improved.

Description

Technical field [0001] The invention belongs to the technical field of quantitative analysis of the resilience of an intelligent distribution network, and particularly relates to a quantitative analysis method of the resilience of an intelligent distribution network with multiple types of loads under windy and sandy weather. Background technique [0002] In recent years, many natural disasters and unreasonable man-made operations have caused large-scale continuous power outages, which have brought unprecedented challenges to the power system. The impact of extreme weather on the power system is generally difficult to resist. In 2008, the snow disaster in southern my country destroyed power facilities in 13 provinces and cities, damaged more than 129 lines, and cut out 14.66 million households. In 2016, Jiangsu Province was hit by a tornado and 135,000 households were out of power. Although the frequency of extreme weather is relatively low, the damage to the power system is often...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a quantitative analysis method for the toughness of the distribution network to ensure a certain proportion of important load power supply under the wind and sand weather conditions, and to better solve the problem of high power supply pressure in the wind and sand weather. Effectively improve the disaster resilience of the distribution network

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