Micro-Grid Stability Improvement Using Static Synchronous Compensator Assisted with Battery Energy Storage System

Integration of distributed generation (DG) with distribution network is essential for best utilization of renewable resources in better economics and clean environmental aspect. Micro-grid (MG) is an aggregation of electrical loads and DGs. Intermittencies of load variation has adverse effect on the voltage at the point of a common couple (PCC). It also prevents the restoring of MG power back to stable state, and voltage instability at PCC makes MG weak interconnection with distribution power grid1. In this article, placement of static synchronous compensator (STATCOM) Assisted with Battery energy storage system (BESS) at PCC scheme is developed. STATCOM assisted with battery energy storage system (BESS) provides instant real power and reactive power support for coupled MG with power grid to ensure voltage stability margin at PCC and it is effective in restoring power stability2,3. Proposed scheme is implemented on a test system which is simulated in MATLAB-SIMULINK. The obtained results verify the effectiveness of placing STATCOM assisted with BESS at PCC.