Optimistic Use of DSTATCOM Controlled Battery Energy Storage System to Mitigate Grid Disturbances with Solar Energy Penetration

Abstract

Level of solar energy penetration in network of utilities is continuously increasing and reached to a significant level in recent years. Power electronics based converters which are used for interfacing solar photovoltaic (PV) plants to power system networks of utilities are non-linear in nature. Any disturbance developed in the network affects system parameters and power flow due to non-linearity of the system. Hence, suitable action is needed to minimize the effects of disturbance to improve the performance of network when solar energy is integrated. A method to minimize effects of grid disturbances on the performance of utility network with solar energy penetration is presented in this manuscript. This is achieved using Distribution static compensator (DSTATCOM) supported by energy storage in a battery. Synchronous reference frame theory is used to achieve control of the DSTATCOM. A test system with five buses, a generator, loads and one solar PV system of 100 kW has been used to establish the effectiveness of the proposed method.