基于新型模糊自适应惯量VSG的微网频率波动抑制  

Novel Fuzzy Adaptive Inertia Based Virtual Synchronous Generator for Microgrid Frequency Fluctuation Attenuation

作　　者：王晨丞 蒲丽娟 杜斌 万忠兵[1] 张君胜[1] 赵智辉[1] WANG Chencheng;PU Lijuan;DU Bin;WAN Zhongbing;ZHANG Junsheng;ZHAO Zhihui(Measurement Center of State Grid Sichuan Electric Power Company,Chengdu 610045,Sichuan,China)

机构地区：[1]国网四川省电力公司计量中心,四川成都610045

出　　处：《电气传动》2022年第5期14-20,共7页Electric Drive

摘　　要：传统的恒输出校正因子模糊自适应惯量控制器的计算结果变化平缓,会导致在频率偏差接近许可值时无法提供足够的惯量以阻止频率进一步偏离。为解决该问题,提出了一种改进型模糊自适应惯量虚拟同步发电机(VSG)技术抑制微网频率波动。其创新性体现在提出了频率偏差界限的概念,并将其融入至模糊控制器设计过程中,实现了当微网频率偏差小于偏差界限时,通过采用较小输出校正因子来获得实时惯量值,而当频率偏差大于界限值时,采用较大的输出校正因子为系统提供足够的惯量。仿真和实验结果表明,提出的基于改进型模糊自适应惯量的VSG控制技术能在频率偏差较小时保证频率响应速度,而在频率偏差较大时提高系统安全性,在生产实践中具有重要的应用价值。Because the calculated results of the traditional fuzzy adaptive inertia controller that uses one constant output scaling factor can only show the modest changing trend,it might not be able to provide sufficient inertia to attenuate the further frequency deviation when the frequency deviation is close to the allowable value. In order to solve the problem,an improved fuzzy adaptive inertia based virtual synchronous generator(VSG)technique was proposed to attenuate the microgrid frequency fluctuation. The novelty mainly includes that the concept of frequency deviation threshold was developed,which was incorporated into the fuzzy controller design process. When the microgrid frequency deviation is lower than the threshold,a smaller output scaling factor is adopted to calculate the real-time inertia,but when the frequency deviation is larger than the threshold,a larger output scaling factor is employed to provide sufficient inertia. The simulation and experimental results prove that the proposed improved fuzzy adaptive inertia based VSG is able to ensure the fast frequency response when the frequency deviation is low,and improve the system safety when the frequency deviation is high,reflecting that it is of high value in the practical applications.

关 键 词：微网 虚拟同步发电机 模糊控制 自适应控制 惯量 

分 类 号：TM61[电气工程—电力系统及自动化]