Simulation on a micro-grid system based on superconducting magnetic energy storage

Renewable energy generation is widely used to solve energy shortage and environment problem. Since the output power of the solar cell and the wind turbine will change with the sunlight irradiation and the wind flow, the power of the solar cell and the wind turbine are not stable, so there is a need of a storage equipment connected to the micro-grid system. With the characteristics of high efficient energy storage and quick response to the power exchange, the superconducting magnetic energy storage (SMES) can be used to meet the balance of the micro-grid. This paper proposes an improved control strategy combing SMES and micro-grid. A SMES and micro-grid system are connected together with the AC bus. A detailed model of the hybrid system is built with MATLAB/SIMULINK. Simulation results with and without SMES connected to the grid-connected photovoltaic system are presented, compared, and analyzed. The results of simulation demonstrate that the SMES system can maintain the grid side power as a constant value which can contribute to the stability and reliability of the micro-grid system.