Analysis 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 analyses 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 whole system is controlled by the controller acting on battery energy storage system, the DC-link voltage and the voltage at PCC. 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.