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文章摘要
虚拟同步发电机动态特性参数分析及配置方法研究
Analysis of Dynamic Characteristic Parameters and Research on Its Configuration Methods of Virtual Synchronous Generator
Received:July 27, 2018  Revised:July 27, 2018
DOI:10.19753/j.issn1001-1390.2019.021.002
中文关键词: 虚拟同步发电机  动态特性  配置方法  小信号分析法
英文关键词: virtual synchronous generator  dynamic characteristics  configuration method  small signal analysis
基金项目:
Author NameAffiliationE-mail
TAO Qian State Grid Hubei Electric Power Research Institute 12558865@qq.com 
TAO Liang* School of Electrical Engineering, Wuhan University 122593639@qq.com 
CUI Yibo State Grid Hubei Electric Power Research Institute pt-5@163.com 
GONG Jinwu School of Electrical Engineering, Wuhan University gongjinwu@whu.edu.cn 
SUN Jianjun School of Electrical Engineering, Wuhan University sunjianjun@whu.edu.cn 
LI Boyang School of Electrical Engineering, Wuhan University 15671567902@163.com 
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中文摘要:
      虚拟同步发电机(Virtual Synchronous Generator,VSG)技术对提高并网逆变器动态特性,增强逆变型电源对电网友好性具有重要的意义。为解决目前缺乏成套VSG动态特性参数设计方法的问题,进一步推动VSG的工程设计及应用,本文基于小信号分析方法建立了VSG有功—频率控制二阶等值模型,分析了虚拟惯量J和阻尼系数Dp对VSG有功功率控制动态特性的影响,建立了对应VSG欠阻尼、临界阻尼及过阻尼等动态过程下J和Dp的参数域,并提出了基于超调量和过渡时间限制的参数配置方法;同时建立了VSG无功—电压控制一阶等值模型,分析了电压下垂系数KU和无功调节系数KQ对VSG无功功率控制动态特性的影响,建立了KU和KQ的参数域,并提出了基于过渡时间限制的参数配置方法。实践表明:所提出的配置方法对于VSG技术理论研究和工程应用过程中的参数选择环节具有很大的参考价值。最后,利用Matlab/Simulink平台的仿真结果证明了所提VSG参数配置方法的正确性和有效性。
英文摘要:
      Virtual Synchronous Generator(VSG) technology is of great significance to improve the dynamic characteristics of grid-connected inverters and enhance the friendliness of contravariant power to the grid. In order to solve the problem of lacking a set of methods to design VSG’s dynamic characteristic parameters and further promote the engineering design and application of VSG, this paper established the second-order equivalent model of VSG’s active power-frequency controller based on the small signal analysis and analyzed the influence of parameters J and Dp on VSG’s control of active power. The parameter domain of J and Dp in the dynamic process of under-damping, critical damping and over-damping of VSG is established and the parameter configuration methods based on the limitation of overshoot and transition time are proposed. At the same time, first-order equivalent model of VSG’s reactive power-voltage controller based on the small signal analysis is established, the influence of parameters KU and KQ on the dynamic characteristics of VSG’s control of reactive power is analyzed, the parameter domain of KU and KQ is established and the parameter configuration methods based on the limitation of transition time are proposed. Practice shows that the proposed configuration methods have a great reference value for the parameter selection in the VSG technology research and engineering application. Finally, the simulation results of Matlab/Simulink platform are used to prove the correctness and validity of the proposed VSG parameter configuration methods.
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