储能系统在分布式发电中的应用

当今以风能、太阳能为代表的可再生能源,因其储量丰富、环境友好等特点,得到人们日益广泛的重视。基于可再生能源的分布式发电是可再生能源利用的一种主要方式,然而,由于可再生能源的间歇性,导致了分布式发电系统的稳定性、可靠性以及电能质量问题,在这种情况下,储能系统应运而生。本文介绍了蓄电池、超级电容、燃料电池以及飞轮等几种常见的储能技术,简要分析各自的工作原理,比较了它们之间的优缺点,并以蓄电池和超级电容为例,分析混合储能系统的构成方式,最后通过Buck/Boost双向变换器与直流母线相连接,给出了一系列适合于分布式发电系统的隔离型Buck/Boost双向变换器,并比较了它们之间的优缺点。

Research on Energy Storage System in Distributed Power Generation

Due to their abundance and environmentally friendly characteristic, the renewable energy sources, represented by wind and solar energy, is gaining more and more attention recently. Meanwhile, the distributed power generation (DG), which is based on renewable energy sources, becomes a main application of the renewable energy. However, due to the intermittency of the renewable energy, problems such as instability, low reliability and poor power quality have become important restraints for the application of DG, under this circumstance, the energy storage system is brought into research as required. In this 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. The structure of hybrid energy storage system is analyzed taking storage battery and super-capacitor as an example. 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.