A Cooperative Operation Method of SVC and SVR for PV Integration into Distribution Systems

Abstract

In distribution systems, the introduction of SVC (Static Var Compensator) that can rapidly control reactive power is expected to cope with the steep voltage changes caused by PV (photovoltaic) output changes in terms of proper voltage profile management. On the other hand, voltage control equipment with tap changer such as SVR (Step Voltage Regulator) has been widely used for voltage control in the distribution systems with relatively long feeder lines. It is important issue to fully utilize those ongoing conventional voltage controllers in order to reduce capital investment cost. An interaction between SVC and SVR is one of important issues when they are connected with the same feeder line. Hence, in this paper, we developed a cooperative voltage control method which can realize more reasonable tap operation of SVR based on estimation technique of reactive power output from SVC supposing only local information is available for SVR control.