储能系统在分布式发电中的应用

Research on Energy Storage System in Distributed Power Generation

当今分布式发电成为可再生能源利用的一种主要方式,但可再生能源的间歇性可引发分布式发电系统的电能质量问题,因此在这种情况下储能系统应运而生。文章介绍了蓄电池、超级电容、燃料电池以及飞轮等几种常见的储能技术,分析了各自的工作原理与优缺点,最后探讨了直流母线组网方式的储能单元接入方式,给出了适合于分布式发电系统的隔离型Buck/Boost双向变换器,并比较了其优缺点。

Today, the distributed power generation(DG) becomes a main application of the renewable energy. However, due to the intermittency of the renewable energy, problems such as poor power qualities have become important restraints for the application of DG. Under this circumstance, the energy storage system is brought into research as required. In the paper, some common energy storage devices such as storage battery, super-capacitor, fuel cell and flywheel, are introduced with their working principle analyzed and advantages and disadvantages compared. Finally, the dc bus access network mode of the energy storage unit is studied, and a series of isolated Buck/Boost Bi-directional converter, which are suitable for distributed power generation system, are studied with their advantages and disadvantages compared.