电网技术2019，Vol.43Issue(5)：1650-1657,8.DOI:10.13335/j.1000-3673.pst.2018.1447
采用二阶滤波的混合储能系统实时功率分配方法
Real-time Power Distribution Method Adopting Second-order Filtering for Hybrid Energy Storage System
李学斌 1刘建伟1
作者信息
- 1. 中国能源建设集团 天津电力设计院有限公司,天津市 北辰区 300400
- 折叠
摘要
Abstract
For hybrid energy storage system consisting of energy-type storage and power-type storage, the real-time power distribution approach based on first-order Butterworth filter is presented. The reasons leading to accumulation of charge or discharge capacity of power-type storage and thus affecting its performance are also analyzed. On this basis, a second-order filter transfer function is constructed to improve the cut-off characteristics at the handover frequency. Meanwhile, the proposed power distribution method enables the power-type storage to contain an attenuated power component independent of input power instruction and filtering process when responding to high frequency power instruction. The attenuated power component makes the power-type storage return to the initial state of charge, and overcomes the integral effect of the first-order Butterworth filtering in response to high-frequency power components. Then the integral function of the second-order high-frequency filter in response to the high-frequency power components is studied. The second-order high-frequency filter is decomposed into response filter and compensation filter, and its frequency characteristics are analyzed. The selection principle of the handover frequency is given. A hybrid energy storage system simulation model is built using PSCAD/EMTDC and effectiveness of the proposed power distribution method is verified.关键词
混合储能/二阶滤波/功率分配/功率波动/荷电状态Key words
hybrid energy storage/second-order filtering/power distribution/power fluctuation/state of charge分类
信息技术与安全科学引用本文复制引用
李学斌,刘建伟..采用二阶滤波的混合储能系统实时功率分配方法[J].电网技术,2019,43(5):1650-1657,8.
