| 引用本文: | 晁凯云,苗世洪,刘子文,等.基于虚拟同步电机控制的微电网稳定性分析[J].电力系统保护与控制,2019,47(3):9-16.[点击复制] |
| CHAO Kaiyun,MIAO Shihong,LIU Ziwen,et al.Stability analysis of microgrid based on virtual synchronous generator control[J].Power System Protection and Control,2019,47(3):9-16[点击复制] |
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| 摘要: |
| 随着微电网中电力电子器件的大量接入，多电源与负荷的动态特性相互耦合，使得微电网系统中稳定分析问题成为研究热点。针对基于虚拟同步电机控制的微电网系统，提出了一种含多分布式电源的系统非线性状态空间建模方法。建立了含分布式电源、线路和负荷的微电网统一状态空间方程。基于所建立的状态空间方程，运用特征根分析法研究了影响微电网系统稳定性的因素。并利用分岔理论研究了虚拟同步电机控制关键参数和系统拓扑结构参数对系统稳定性的影响。在PSCAD/ETMDC仿真平台搭建了基于虚拟同步电机控制的微电网模型，验证了所提方法的正确性和有效性。 |
| 关键词: 微电网 虚拟同步电机 非线性状态空间建模 分岔理论 稳定性分析 |
| DOI：10.7667/PSPC180160 |
| 投稿时间：2018-02-06修订日期：2018-05-03 |
| 基金项目:国家重点研发计划项目资助(2017YFB0903601);国家自然科学基金项目资助(51777088);2018年国家电网公司总部科技项目资助(SGNXDK00DWJS1800016)“预装式微网储能电站优化集成技术研究及应用” |
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| Stability analysis of microgrid based on virtual synchronous generator control |
| CHAO Kaiyun,MIAO Shihong,LIU Ziwen,FAN Zhihua,KANG Yilong,DUAN Simo,LIU Junyao |
| (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Hubei Electric Power Security and High Efficiency Key Laboratory, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China) |
| Abstract: |
| With the massive access of power electronic devices in the microgrid, the dynamic characteristics of multiple power sources and loads are coupled with each other, which makes the problem of stability analysis in the microgrid system become a hot spot. In this paper, based on the virtual synchronous motor control of microgrid systems, a multi-distributed power system nonlinear state-space modeling method is proposed, and a unified state-space equation of microgrid with distributed power, line and load is established. Based on the established state-space equation, the eigenvalue analysis is used to study the factors that affect the stability of the microgrid system. Then the bifurcation theory is used to study the influence of the key parameters of the virtual synchronous motor control and the system topology parameters on system stability. The microgrid model based on virtual synchronous motor control is built on the PSCAD/ETMDC simulation platform, which verifies the correctness and effectiveness of the proposed method. This work is supported by National Key Research and Development Program of China (No. 2017YFB0903601), National Natural Science Foundation of China (No. 51777088), and Science and Technology Project of the Headquarter of State Grid Corporation of China in 2018 “Research and Application of Pre-installed Microgrid Energy-storage Substation Optimization Integration Techniques” (No. SGNXDK00DWJS1800016). |
| Key words: microgrid virtual synchronous machine nonlinear state space modeling bifurcation theory stability analysis |
