Enhancement of micro-grid dynamics in presence of wind units using Energy Capacitor Systems

This paper proposes an Energy Capacitor System (ECS) designed to enhance the dynamics of micro-grids in presence of wind generation units. The output power of wind units fluctuates due to continuous variations in wind speed. In a power system with high penetration of wind units - like a microgrid - this can considerably deteriorate the dynamics of the entire system. To study the negative impacts of high penetration of wind power on power system dynamics and compensation of this negative impact through ECS, the following tasks are undertaken in this paper. First, a micro grid test system is modeled using MATLAB Simulink software. Then, an ECS unit is designed to mitigate the negative effects caused by the wind unit due to wind speed fluctuations. Finally, the dynamics of the test system for a short-circuit fault is studied. The simulation results show that ECS units can effectively improve the dynamics of the system, thus compensating for negative effects of wind speed fluctuations (in normal steady state operation) and during/after a major short circuit fault.