SMES Device Charged by Renewable Energy Used to Regulate Frequency of Interconnected Power System

摘要

Development and utilization of renewable energy source (RES) is an important content of global energy development strategy. Being restricted by natural conditions, the output characteristic of renewable energy generation is stochastic. If renewable energy generator units be connected with public grid directly, it will result in the instability of power grid. In this paper, apply wind power as an example, using renewable energy as charge power supply for Superconducting Magnetic Energy Storage (SMES) systems. SMES device possesses some advantages of high efficiency, fast response and good capability of exchange active and reactive power independently with power system. It is a new idea for developing renewable energy. SMES can regulate output depending on load changing on time, which can stabilize fluctuation of frequency and reduce unnecessary power flow among tie lines. Simulation result proved that SMES not only can improve frequency effectively, but also can resolve the defect of inadequate spinning reserve.