Distinctive features of analysis of reliability of overhead distribution networks with sources of distributed generation

Abstract

The authors have shown that the existing reliability management experience abroad because of the topology specifics, switching devices, relay protection and automation tools used is not fully applicable to domestic distribution networks. In this regard, new modeling and optimization methodology of power supply reliability parameters, oriented also at the appearance possibility of distributed generation sources in the structure of electric networks was proposed. The paper presents the results of a comparative analysis of the application conditions of distributed generation tools with different equipment of electrical networks by automatic and non-automatic switching devices, in order to substantiate optimal connection zones of generating sources under different application conditions. Recommendations for setting relay protection tools under the joint use of reclosers and fuses in the networks with distributed generation sources to eliminate false alarms and unwarranted disconnection of fuses at transient faults were developed. It is shown that under the valuation of reliability indicators, cost estimate of measures on providing electricity networks with required switching and protective devices serves as private objective function during multicriterion substantiation of optimal integration options of distributed generation into electric networks.