Power Decoupling Control Strategy of 35 kV Cascaded H-Bridge Energy Storage System

2020 IEEE International Conference on Networking, Sensing and Control (ICNSC) Pub Date : 2020-10-30 DOI:10.1109/ICNSC48988.2020.9238102

Xiaojun Zhu, Yan Li, Yibin Tao, Qun Zhang, J. Xue, Chen Zhou, Zhihao Yang

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Abstract

New energy with increasing permeability has increased the unstable factors of power system. Large-scale energy storage system compensating for the fluctuating power of new energy power generation has a high practical significance. To make full use of the regulating ability of the energy storage system, a power decoupling control model of 35kV cascaded H-bridge energy storage system is proposed with the capacity of the energy storage system. Firstly, the topology of 35kV energy storage system is given. Secondly, according to the related technical standards and requirements, the model of cascaded unit equipment of the system is determined. Based on 35kV cascaded H-bridge energy storage system, power regulation model of energy storage power conversion system (PCS) is built and the active power and reactive power decoupling control strategy for energy storage system is obtained. Finally, the control strategy is simulated and validated by using MATLAB/Simulink simulation system. The stability of the control strategy can be verified by the results.

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35kv级联h桥储能系统功率解耦控制策略

新能源的渗透率不断提高，增加了电力系统的不稳定因素。大型储能系统补偿新能源发电的波动功率具有很高的现实意义。为了充分利用储能系统的调节能力，基于储能系统容量，提出了35kV级联h桥储能系统的功率解耦控制模型。首先给出了35kV储能系统的拓扑结构。其次，根据相关技术标准和要求，确定了系统级联单元设备的型号。基于35kV级联h桥储能系统，建立了储能功率转换系统(PCS)的功率调节模型，获得了储能系统的有功与无功解耦控制策略。最后，利用MATLAB/Simulink仿真系统对控制策略进行了仿真和验证。仿真结果验证了控制策略的稳定性。

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2020 IEEE International Conference on Networking, Sensing and Control (ICNSC)

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