Maximum PV Penetration Capacity Evaluation of a Novel Method for Determining LDC Control Parameters of Step Voltage Regulators

This paper presents and evaluates a new method for determining the load drop compensator (LDC) parameters of a load ratio transformer (LRT) and step voltage regulator (SVR) used in an electrical power distribution system. Because the voltage control effect produced by LRT and SVR depends on the combination of their respective LDC parameters, these should be determined properly in order to control voltage within a proper range. Introduction of photovoltaic generation systems into a distribution system makes voltage control difficult and causes the optimal parameters to vary between dayand nighttime. In the proposed method, the parameters are reset every hour based on a database of all feasible parameters during every hour in the past. Simulation results in which the maximum PV penetration capacity of the proposed method is compared with that of a centralized control method are used to evaluate the performance of the proposed method. 