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基于虚拟同步机的变流器暂态稳定分析及混合同步控制策略
作者:
作者单位:

1.浙江大学电气工程学院,浙江省杭州市 310027;2.国网河北省电力有限公司,河北省石家庄市 050021;3.国网河北省电力有限公司电力科学研究院,河北省石家庄市 050021;4.浙大城市学院,浙江省杭州市 310027

摘要:

针对采用组网型控制策略(以虚拟同步机控制为例)且考虑电流限幅的电压源型变流器(VSC)暂态稳定性差且失稳机理不明的问题,首先从传统同步机的暂态稳定分析方法入手,定性地分析了组网型VSC的暂态过程。然后,通过基于相图的非线性微分方程的分析方法,定量研究了组网型VSC的暂态失稳机理,并提出了一种结合了传统同步机摇摆方程和锁相环的新型同步方法(称为混合同步控制),使得VSC不仅具备频率响应的能力,而且其暂态稳定裕度得到了大幅提高。最后,通过MATLAB/Simulink搭建的仿真模型验证了分析方法的准确性和所提控制方案的有效性。

关键词:

基金项目:

国家自然科学基金资助项目(52007167);浙江省自然科学基金资助项目(LQ21E070004)。

通信作者:

作者简介:

姜卫同(1999—),男,硕士研究生,主要研究方向:新能源并网与主动配电网。E-mail:wtjiang@zju.edu.cn
胡鹏飞(1988—),男,通信作者,博士,研究员,主要研究方向:柔性交直流输配电技术、新能源并网与主动配电网、电力电子化电力系统分析与控制。E-mail:zjuhpf@163.com
尹瑞(1990—),男,博士,工程师,主要研究方向:灵活交流输电技术。E-mail:1021207298@zju.edu.cn


Transient Stability Analysis and Hybrid Synchronization Control Strategy of Converter Based on Virtual Synchronous Generator
Author:
Affiliation:

1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;2.State Grid Hebei Electric Power Co., Ltd., Shijiazhuang 050021, China;3.Electric Power Research Institute of State Grid Hebei Electric Power Co., Ltd., Shijiazhuang 050021, China;4.Zhejiang University City College, Hangzhou 310027, China

Abstract:

Aiming at the problem of poor transient stability and unclear instability mechanism of the voltage source converter (VSC) that adopts the grid-forming control strategy (take the virtual synchronous generator control as an example) with a current limiting loop, this paper starts with the transient stability analysis of the traditional synchronous generator, and qualitatively analyzes the transient process of the grid-forming VSC. Through the nonlinear differential equation analysis method based on the phase portrait, the quantitative analysis of the transient instability mechanism of the grid-forming VSC is implemented. Moreover, a new synchronization method (called hybrid synchronization control) that combines the swing equation of the traditional synchronous generator and the phase-locked loop is proposed, which makes the VSC not only has the ability of frequency response, but also greatly improve its transient stability margin. Finally, the simulation model built in MATLAB/Simulink verifies the accuracy of the analysis method and the effectiveness of the proposed control scheme.

Keywords:

Foundation:
This work is supported by National Natural Science Foundation of China (No. 52007167) and Zhejiang Provincial Natural Science Foundation of China (No. LQ21E070004).
引用本文
[1]姜卫同,胡鹏飞,尹瑞,等.基于虚拟同步机的变流器暂态稳定分析及混合同步控制策略[J].电力系统自动化,2021,45(22):124-133. DOI:10.7500/AEPS20210302010.
JIANG Weitong, HU Pengfei, YIN Rui, et al. Transient Stability Analysis and Hybrid Synchronization Control Strategy of Converter Based on Virtual Synchronous Generator[J]. Automation of Electric Power Systems, 2021, 45(22):124-133. DOI:10.7500/AEPS20210302010.
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  • 收稿日期:2021-03-02
  • 最后修改日期:2021-05-15
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  • 在线发布日期: 2021-11-16
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