The problems of electrical distance in connection with the operation of wind power generator

Abstract

Renewable sources of electrical energy (especially the wind power generators), which have been lately promoted, are causing problems in distribution and transmission operation networks. Variable supply (or load) of electrical energy cause voltage fluctuations in the distribution networks, changes in short-circuit ratio, and also affect active losses in the network at the expense of distribution companies. Alternative generators of electricity influence the distribution networks not only by their output power, but also by their electrical distance from the supply network, i.e. mostly from the distributing point of the superior system. The issue of electrical distance is currently seen only in relation with the short-circuit effect (short-circuit contribution of individual generators). The presented paper correlates the electrical distance of the connection point of wind power generators in the distribution network of medium voltage (22kV) from the 110kV power supply node and the voltage effect on the distribution network and the 110kV power network.