中国电力 ›› 2021, Vol. 54 ›› Issue (10): 217-222.DOI: 10.11930/j.issn.1004-9649.202108034

• 新能源 • 上一篇    下一篇

基于极点配置的新能源并网附加阻尼控制策略

张义1, 胡正阳2, 彭佩佩3, 陈宁3, 唐冰婕3, 高丙团2   

  1. 1. 国家电网有限公司,北京 100031;
    2. 东南大学 电气工程学院,江苏 南京 210096;
    3. 中国电力科学研究院有限公司,江苏 南京 210003
  • 收稿日期:2021-08-11 修回日期:2021-09-14 出版日期:2021-10-05 发布日期:2021-10-16
  • 作者简介:张义(1978-),男,博士,高级工程师,从事智能电网技术研究,E-mail:zhang-yi@sgcc.com.cn;胡正阳(1994-),男,博士研究生,从事新能源发电并网控制研究,Email:huzhengyang@seu.edu.cn;彭佩佩(1984-),女,通信作者,工程师,从事智能电网技术研究,E-mail:pengpeipei@epri.sgcc.com.cn
  • 基金资助:
    国家重点研发计划资助项目(可再生能源与火力发电耦合集成与灵活运行控制技术,2019YFB1505400)

Pole Assignment Based Auxiliary Damping Control for Renewable Generation Integrated into Power System

ZHANG Yi1, HU Zhengyang2, PENG Peipei3, CHEN Ning3, TANG Bingjie3, GAO Bingtuan2   

  1. 1. State Grid Corporation of China, Beijing 100031, China;
    2. School of Electrical Engineering, Southeast University, Nanjing 210096, China;
    3. China Electric Power Research Institute, Nanjing 210003, China
  • Received:2021-08-11 Revised:2021-09-14 Online:2021-10-05 Published:2021-10-16
  • Supported by:
    This work is supported by the National Key Research and Development Program of China (Coupling Integration and Flexible Operation Control Technology of Renewable Energy and Thermal Power Generation, No.2019YFB1505400)

摘要: 大量新能源经电力电子装备接入电网改变了电力系统的阻尼特性,导致同步发电机低频振荡问题凸显,对系统安全稳定运行构成威胁。虚拟同步发电机作为一种新型的变流器控制技术,有必要对新能源基于该技术接入系统的阻尼特性进行深入分析。首先,建立虚拟同步发电机控制器的数学模型与同步发电机模型。其次,以新能源并入单机无穷大系统为研究对象,基于小信号分析法分析该策略与同步发电机的运行特性耦合机理。最后,提出一种新能源并网的附加阻尼控制策略,并基于电力系统极点配置法,设计附加阻尼控制器以改善系统阻尼特性并抑制系统低频振荡,仿真结果验证了理论分析的正确性。

关键词: 虚拟同步发电机, 新能源, 低频振荡, 阻尼控制

Abstract: A large amount of renewable energy has changed the damping characteristics of the power system through the access of power electronic equipment, resulting in the prominent problem of low-frequency oscillation of synchronous generators, posing a threat to the safe and stable operation of the system. Virtual synchronous generator (VSG) is a new type of converter control technology, and it is necessary to analyze the damping characteristics of renewable energy integrated to power system based on VSG. Firstly, the mathematical model of the VSG controller and the model of synchronous generator are established. Secondly, taking the renewable energy into the single-machine infinite bus system as the research object, the coupling mechanism of the operation characteristics of the VSG and the synchronous generator is analyzed based on the small-signal analysis. Furthermore, an auxiliary damping control strategy for renewable energy grid-connection is proposed, and a virtual synchronous generator auxiliary damping controller is designed to suppress the low-frequency oscillation of the system based on the principle of pole assignment of the power system. Finally, the simulation results verify the correctness of the theoretical analysis.

Key words: virtual synchronous generator, renewable energy, low-frequency oscillation, damping control