Modeling of the CIGRE Low Voltage Test Distribution Network and the Development of Appropriate Controllers

The fluctuating nature of some of the Distributed Generation (DG) sources can cause power quality related problems like power frequency oscillations, voltage fluctuations etc.In future, the DG penetration is expected to increase and hence this requires some control actions to deal with the power quality issues.The main focus of this paper is on development of controllers for a distribution system with different DG's and especially development of a Photovoltaic (PV) controller using a Static Compensator (STATCOM) controller and on modeling of a Battery Storage System (BSS) also based on a STATCOM controller.The control system is tested in the distribution test network set up by CIGRE.The new approach of the PV controller is done in such a way that it can control AC and DC voltage of the PV converter during dynamic conditions.The battery controller is also developed in such a way that it can control its charge/discharge rate and also the reactive power flow through the lines in order to improve the power factor.Simulation results shows that the controllers are able achieve a good power quality in the test grid.