基于虚拟阻抗及重复控制的VSG功率解耦策略  

Power decoupling strategy for virtual synchronous generator based on virtual impedance and repetitive control

作　　者：文永兴 罗朝旭 张博 唐立行 Wen Yongxing;Luo Zhaoxu;Zhang Bo;Tang Lixing(Hunan University of Technology,Zhuzhou 430064,Hunan,China)

机构地区：[1]湖南工业大学,湖南株洲412000

出　　处：《船电技术》2024年第1期42-47,共6页Marine Electric & Electronic Engineering

摘　　要：虚拟同步发电机(virtual synchronous generator,VSG)控制技术的功率环存在耦合导致参数难以整定,同时输出电流会产生畸变,针对这些问题,提出了一种电流环采用复合型重复控制的VSG解耦方案。对功率环存在耦合的问题,建立小信号分析模型研究后,提出一种加入虚拟阻抗的环路解耦控制方法,简化系统后更易获取参数。同时为降低VSG输出电流的畸变率,提高系统稳定性和加快系统的动态响应速度,在电流环采用改进型重复控制策略。最后在Matlab/Simulink仿真软件中搭建了虚拟同步发电机的仿真,验证了上述理论分析的正确性及所提控制策略的有效性。The coupling of the power loop of the virtual synchronous generator(VSG)control technology leads to the difficulty of parameter tuning and the distortion of the output current.In order to solve these problems,a VSG decoupling scheme with compound repetitive control of the current loop is proposed.For the problem of power loop coupling,after analysis of a small signal model,a loop decoupling control method with virtual impedance is proposed to simplify the system and facilitate to obtain parameters.At the same time,in order to reduce the distortion rate of the VSG output current,improve the system stability and accelerate the dynamic response of the system,an improved repetitive control strategy is adopted in the current loop.Finally,the simulation of virtual synchronous generator is built in Matlab/Simulink simulation software,which verifies the correctness of the above theoretical analysis and the effectiveness of the proposed control strategy.

关 键 词：虚拟同步发电机 功率耦合 虚拟阻抗 重复控制 

分 类 号：TM341[电气工程—电机]