Design and analysis for optimal control of integrated with photovoltaic and energy storage parallel system

被引：0
|
作者：
Wen C. [1 ]
Dai W. [1 ]
Li J. [1 ]
Wang P. [1 ]
Zhou J. [1 ]
Zhou X. [2 ]
机构：
[1] Beijing Variable Frequency Technology Engineering Research Center of North University of Technology, Beijing
[2] State Grid Comprehensive Energy Service Group Co., Ltd., Beijing
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 05期
关键词：
Adaptive droop control; Integrated with photovoltaic and energy storage; Parallel system; Parameter design;
D O I：
10.19912/j.0254-0096.tynxb.2020-0315
中图分类号：
学科分类号：
摘要：
Due to the integrated with photovoltaic and energy storage parallel system has the characteristics of high power electronic, the stability and operation flexibility of the DC microgrid formed by it are different from the traditional AC grid. Among them, a large number of power electronic devices bring weakened anti-disturbance capability to the system, and the bus voltage is prone to fluctuate and cause the problem of instability of the entire system. To this end, this paper first adopts an adaptive droop control strategy that considers the rate of change of the bus voltage to reduce the system voltage fluctuations and enhance the system's operating stability. Then establishes a state space model of the integrated with photovoltaic and energy storage parallel system with droop control The influence of the droop coefficient on the system stability is analyzed. On this basis, the optimal control value range of the adaptive droop coefficient is obtained to improve the voltage stability of the system. Finally, the simulation and experimental results show that the adaptive droop control strategy adopted in this paper can not only reduce the voltage deviation caused by the traditional droop control, but also shorten the recovery time after the sudden voltage change and improve the stability of the system. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：150 / 159
页数：9
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