Modeling and Control of DSTATCOM with BESS for Mitigation of Flicker

Industry customers of supply utility such as, electric arc furnaces and arc resistance welder and other such time varying loads which are cyclic in nature are the major flicker source to influence the grid power quality. Distribution STATic Synchronous COMpensator (DSTATCOM) with Battery Energy Storage System (BESS) is proposed as a viable and effective alternative for mitigation of flicker. This paper examines the dynamic performance of a DSTATCOM coupled with BESS for mitigation of flicker. The detailed modeling of DSTATCOM with BESS and its control strategies are analyzed. The control technique proposed will be focused on the control of energy flow among the system components with effective real power utilization from the batteries. This relives the main power system components from the fluctuating voltages. The detail components of the systems are mathematically modeled to embed the battery energy for the real power utilization to mitigate the voltage fluctuations. Results from digital simulation performed in PSCAD/EMTDC will demonstrate the effectiveness of DSTATCOM/BESS for mitigation of flicker.