电池储能变换器弱电网运行控制与稳定性研究

发布时间：2018-02-04 09:38

本文关键词： 电压型控制电流型控制储能变换器弱电网运行阻抗分析　出处：《中国电机工程学报》2017年01期 　论文类型：期刊论文

【摘要】：分布式电池储能变换器一般采用电流型控制算法,变换器低频段等效容性输出阻抗导致其弱电网运行稳定性较差,多机并列运行时易引发谐振。该文针对储能变换器弱电网运行稳定性问题,研究储能变换器电压型控制算法,建立了基于电压型控制算法的变换器阻抗模型并分析其稳定性。模型的阻抗分析结果表明,采用电压型控制的储能变换器对电网呈现感性输出阻抗的非理想电压源特性,不易与持续增大的电网阻抗发生谐振,具备更佳的电网适应性。通过仿真分析与实验验证,证明了理论分析与建模过程的正确性,以及电压型控制算法的可行性。
[Abstract]:Distributed battery energy storage converter generally adopts current-mode control algorithm. The low frequency equivalent capacitive output impedance of the converter leads to poor stability of weak power grid. In order to solve the problem of weak power grid stability of energy storage converter, a voltage mode control algorithm for energy storage converter is studied in this paper. The impedance model of the converter based on voltage mode control algorithm is established and its stability is analyzed. The voltage-mode controlled energy storage converter is not an ideal voltage source with inductive output impedance, which is not easy to resonate with the continuously increasing power grid impedance. Through simulation and experimental verification, the correctness of theoretical analysis and modeling process and the feasibility of voltage source control algorithm are proved.
【作者单位】：风力发电研究中心(上海交通大学电子信息与电气工程学院);
【分类号】：TM464
【正文快照】： 分析与实验验证,证明了理论分析与建模过程的正确性,以及电压型控制算法的可行性。0引言近年来,以风电和光伏发电为代表的可再生能源分布式发电技术迅速发展,在电力系统中所占比重逐年增加。与此同时,电池储能系统(batteryenergy storage system,BESS)作为一种能量存储媒介,可

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