| 独立微网中虚拟同步发电机的频率自恢复控制策略 |
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| 引用本文： | 张宇华,赵晓轲,方艺翔.独立微网中虚拟同步发电机的频率自恢复控制策略[J].电网技术,2019(6):2125-2131. |
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| 作者姓名： | 张宇华 赵晓轲 方艺翔 |
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| 作者单位： | 上海电力学院电气工程学院 |
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| 摘 要： | 在采用虚拟同步发电机控制的独立微电网中,为使频率获得良好的动态响应特性,利用虚拟同步发电机的储能单元参与二次调频,提出一种独立微网中虚拟同步发电机的频率自恢复控制策略(frequency self-recovery,FSR);并对双机二次调频系统进行了稳定性分析;该控制策略能够根据频率偏移自动在一次二次调频控制策略间切换,有效抑制频率越限,使频率较快恢复,且能在不依赖复杂通信系统的情况下有效提高独立微网的频率稳定性,具有较高的可靠性。仿真分析验证了文中所提方法的有效性。
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| 关 键 词： | 微网 储能 虚拟同步发电机 频率自恢复 |
Research on Frequency Self-recovery Control for Virtual Synchronous Generator in Island Microgrid |
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| ZHANG Yuhua,ZHAO Xiaoke,FANG Yixiang.Research on Frequency Self-recovery Control for Virtual Synchronous Generator in Island Microgrid[J].Power System Technology,2019(6):2125-2131. |
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| Authors: | ZHANG Yuhua ZHAO Xiaoke FANG Yixiang |
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| Affiliation: | (School of Electrical Engineering,Shanghai University of Electric Power,Yangpu District,Shanghai 200090,China) |
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| Abstract: | In island microgrid controlled with virtual synchronous generators(VSGs), in order to obtain good dynamic response characteristics of frequency, a frequency self-recovery control strategy(FSR) based on virtual synchronous generator is proposed using the idea of energy storage participating in secondary frequency modulation of power network. Then stability of dual-machine secondary frequency modulation system is analyzed. The control strategy can automatically switch between primary and secondary frequency modulation control strategies according to frequency offset, effectively restrain frequency over-limit and quickly recover frequency. Moreover, frequency stability of the island microgrid can be improved effectively with high reliability without complex communication system. Simulation results verify effectiveness of the proposed method. |
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| Keywords: | microgrid energy storage virtual synchronous generator(VSG) frequency self-recovery(FSR) |
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