浙江电力

2019, v.38;No.277(05) 31-35

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计及线路电阻的直流微网混合储能系统电流分配控制策略
A Current Distribution and Control Strategy of Hybrid Energy Storage System in DC Microgrid Considering the Influence of Line Resistance

陈德彪,蒋伟明,刘海风,高明明,赵晋斌
CHEN Debiao,JIANG Weiming,LIU Haifeng,GAO Mingming,ZHAO Jinbin

摘要(Abstract):

在研究传统混合储能电流分配控制策略的基础上,分析存在线路电阻参数时对混合储能系统电流分配的影响,提出了一种基于阻抗主动测量的改进下垂控制策略。该策略中,功率波动的低频成分仅由蓄电池补偿,而高频成分由超级电容补偿。在PSIM中搭建了包含单台蓄电池和单台超级电容的混合储能仿真电路,仿真结果表明,所提控制方法能够削弱线路参数造成的影响,实现混合储能系统的分频协调控制。
Based on the traditional hybrid energy storage current distribution and control strategy, the influence of line resistance parameters on the current distribution of hybrid energy storage system is analyzed theoretically, and an improved droop control strategy based on impedance active measurement is proposed. By using this proposed method, the low-frequency components of power fluctuation are compensated only by battery, while the high-frequency components are compensated by ultra-capacitor. Finally, a hybrid energy storage simulation model including a single battery and a single ultra-capacitor is built in PSIM. The simulation result shows that the proposed method can reduce the impact of line parameters and achieve coordinated control of the hybrid storage system with the frequencies differ.

关键词(KeyWords): 超级电容;电流分配;蓄电池;线路电阻;直流微电网
ultra-capacitor;current distribution;storage battery;line resistance;DC microgrid

Abstract:

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作者(Author): 陈德彪,蒋伟明,刘海风,高明明,赵晋斌
CHEN Debiao,JIANG Weiming,LIU Haifeng,GAO Mingming,ZHAO Jinbin

DOI: 10.19585/j.zjdl.201905005

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