基于自适应VSG的微网光储充放电控制技术

沈志雨; 刘毅力; 郑博文; 齐英伟; 李佼洁

doi:10.16513/j.2096-2185.DE.2106564

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分布式能源 ›› 2021, Vol. 6 ›› Issue (5) : 18-25. DOI: 10.16513/j.2096-2185.DE.2106564

学术研究

基于自适应VSG的微网光储充放电控制技术

沈志雨 ¹ ,
刘毅力 ¹ ,
郑博文 ² ,
齐英伟 ² ,
李佼洁 ¹

作者信息 +

Microgrid Optical Storage Charge and Discharge Control Technology Based on Adaptive Virtual Synchronous Generator

Author information +

文章历史 +

摘要

针对光储结合的微网发电系统因惯性和阻尼不足而造成的电网频率波动和功率振荡等问题，提出一种光储自适应虚拟同步发电机(virtual synchronous generator，VSG)并网控制技术。在研究储能电池荷电状态(state of charge，SOC)对惯性功率影响的基础上，分析蓄电池充放电功率对VSG工作特性的影响，同时在光伏侧进行最大功率跟踪(maximum power point tracking，MPPT)，并通过对VSG中惯量和阻尼参数的整定，建立了考虑储能电池充放电和VSG自适应控制的三相光储系统。研究结果表明：该控制策略可以有效改善光储微网系统频率的稳定性和响应速度、抑制功率振荡、同时具备一次调频的能力。最后，通过仿真验证了该策略的有效性。

Abstract

Aiming at the problems of grid frequency fluctuations and power oscillations caused by inertia and insufficient damping in the microgrid power generation system combined with solar storage, a kind of solar storage adaptive virtual synchronous generator (virtual synchronous generator, VSG) grid-connected control technology was proposed. On the basis of studying the influence of the state of charge (SOC) of the energy storage battery on the inertial power, the influence of the charging and discharging power of the battery on the working characteristics of the VSG was analyzed, and maximum power point tracking (MPPT) was performed on the photovoltaic side. Through the adjustment of the inertia and damping parameters in the VSG, a three-phase optical storage system considering the charging and discharging of the energy storage battery and the adaptive control of the VSG was established. The research results show that the control strategy can effectively improve the frequency stability and response speed of the optical storage microgrid system, restrain power oscillation, and have the ability of one-time frequency modulation. Finally, the effectiveness of the strategy was verified by simulation.

导出引用

沈志雨, 刘毅力, 郑博文, 等. 基于自适应VSG的微网光储充放电控制技术[J]. 分布式能源. 2021, 6(5): 18-25 https://doi.org/10.16513/j.2096-2185.DE.2106564

Zhiyu SHEN, Yili LIU, Bowen ZHENG, et al. Microgrid Optical Storage Charge and Discharge Control Technology Based on Adaptive Virtual Synchronous Generator[J]. Distributed Energy Resources. 2021, 6(5): 18-25 https://doi.org/10.16513/j.2096-2185.DE.2106564

中图分类号： TM743

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