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作 者:王素娥[1] 李晶[1] 郝鹏飞[1] WANG Su-e;LI Jing;HAO Peng-fei(School of Electrical and Control Engineering,Shaanxi University of Science&Technology,Xi′an 710021,China)
机构地区:[1]陕西科技大学电气与控制工程学院,陕西西安710021
出 处:《陕西科技大学学报》2022年第6期150-162,169,共14页Journal of Shaanxi University of Science & Technology
基 金:陕西省西安市科技计划项目(21XJZZ0003,2020KJRC0001)。
摘 要:虚拟同步发电机(VSG)控制技术用于电力电子变换器,模拟了同步发电机的暂态特性,赋予了电网惯性和阻尼的功能,具有良好的频率支撑能力与电网兼容性.提出了一种VSG控制的系统性能综合分析方法,可以作为设计VSG控制器的理论基础.首先在分析VSG工作原理的基础上,建立了VSG的等效模型;其次建立了VSG的小信号模型,推导了以有功功率参考值、无功功率参考值及电网频率为输入量,以输出有功功率和输出无功功率为输出量的相关传递函数;然后,基于传递函数求出了系统稳态性能及暂态性能与VSG控制参数的关系,并分析了参数对系统性能的影响;最后通过仿真验证了相关理论分析的正确性.Virtual synchronous generator(VSG)control technology is used in power electronic converter,which simulates the transient characteristics of synchronous generator,endows the power grid with inertia and damping functions,and has good frequency support capability and power grid compatibility.This paper presents a comprehensive analysis method of VSG control system performance,which can be used as the theoretical basis for designing VSG controller.Firstly,the equivalent model of VSG is established on the basis of analyzing the working principle of VSG.Secondly,the small signal model of VSG is established,and the related transfer functions of active power reference value,reactive power reference value and grid frequency as input,active power output and reactive power output as output are derived.Then,based on the transfer function,the relationship between the system steady-state performance,transient performance and VSG parameters is obtained,and the influence of the parameters on the system performance is analyzed.Finally,the correctness of relevant theoretical analysis is verified by simulation.
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