高振,雷为民,赵峰,刘辉,程雪坤,巨云涛
GAO Zhen,LEI Weimin,ZHAO Feng,LIU Hui,CHEN Xuekun,JU Yuntao

• 1:中国农业大学信息与电气工程学院
• 2:国网冀北电力有限公司
• 3:国网冀北电力科学研究院(华北电力科学研究院有限责任公司)
• 4:国家电网公司风光储并网运行技术实验室

摘要(Abstract)：

VSG(虚拟同步发电机)由于电流限幅、阻尼大等特性,接入电网后对系统稳定性会产生影响。搭建了一种较为准确的VSG模型,在计及VSG特性的情况下,采用Lyapunov直接法对接有VSG的单机无穷大系统进行暂态稳定性分析,并用时域仿真的结果来验证其准确性。结果表明:VSG接在四机两区域系统的受端相比送端,临界能量更小,系统更容易失稳;将VSG接在送端时,增加VSG的占比,临界能量呈减小的趋势,系统失稳的可能性增大。
VSG(virtual synchronous generator) has its characteristics such as current limit and large damping,which affect the stability of the system after it is connected to the grid. A more accurate VSG model is built.Considering the characteristics of current limit and large damping of VSG, the Lyapunov direct method is used to analyze the transient stability of the single-machine infinity system with VSG and the results of the time-domain simulation are used to verify its accuracy. The results show that when VSG is connected to the receiving end of the four-machine two-zone system, the critical energy is smaller, and the system is more susceptible to instability; when the VSG is connected to the transmitting end, the proportion of VSG is increased, the critical energy is decreased, and the possibility of system instability is increased.

关键词(KeyWords)： 虚拟同步发电机;电流限幅;大阻尼;Lyapunov直接法;暂态稳定性
virtual synchronous generator;current limit;large damping;Lyapunov direct method;transient stability

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 高振,雷为民,赵峰,刘辉,程雪坤,巨云涛
GAO Zhen,LEI Weimin,ZHAO Feng,LIU Hui,CHEN Xuekun,JU Yuntao

DOI: 10.19585/j.zjdl.201910009

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