Research on superconducting magnetic energy storage in the photovoltaic distributed generation

With the development of power system, the disadvantages of power system stability appeared. Because of the rapid development of power electronic technology, people have paid more close attention to distributed generation (DG). The intermittence and unpredictable nature of the wind or solar power make the successful integration of the DG schemes, which based on green/clean energy, a challenging task. As an energy storage element, superconducting magnetic energy storage (SMES) plays a very important role in improving operating stability of the whole system, which is made of the DG and the power system. SMES is coupled with the DG system through a power electronic converter. This paper constitutes a combination of the DG system and SMES. Take distributed by photovoltaic generation system as an example, a structure of the DG system with SMES is designed. An exact simulation model of DG system with SMES equipment is set up. The results of simulation demonstrate that the SMES equipment can substantially improve operating stability of the DG system and the power system. The experimental prototype with the capacity of 10 kVA is completed.