超级电容与蓄电池混合储能对微电网频率稳定性改善研究

摘要

As more and more new energy generation are connected in micro grid, single energy stor-age scheme is nolonger meet the requirement of micro grid's frequency stability.Then we need to adopt composite energy storage technology to improve the frequency stability of micro grid.This paper study on the composite energy storage system which is contains battery and super capacitor, and use the properly coordinated control strategy to improve the frequency stability of the micro grid, which is operated in is-land mode.Through the analysis of simulation results, the proposed composite energy storage control scheme is superior to the single energy storage scheme on the improvement of the micro grid's island fre-quency stability.%随着越来越多的新能源发电并入微电网，单一储能技术已无法满足微电网对自身频率稳定性的要求。这时需要采用多元混合储能技术来改善微电网的频率稳定性。该文主要研究了微电网孤岛运行时，通过在交流母线处配置蓄电池和超级电容器两种储能装置，并且协调控制这两种储能装置的运行，来使微电网在风速扰动时系统频率能够快速地恢复稳定。通过对仿真结果的分析及比较，验证了所提出的混合储能方案对微电网孤岛运行时频率稳定性的改善作用优于单一储能方案。