• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2015, Vol. 36 ›› Issue (9): 9-15.doi: 10.3969/j.issn.1000-7229.2015.09.002

• 特高压直流输电技术专辑 • 上一篇    下一篇

±1 100 kV特高压直流输电系统低频谐振分析

王运超1,余占清1,吴娅妮2,陈水明1,曾嵘1,何金良1,胡军1,刘明松2,李新年2   

  1. 1.电力系统及发电设备控制和仿真国家重点实验室(清华大学电机与应用电子技术系),北京市 100084;2.中国电力科学研究院,北京市 100192
  • 出版日期:2015-09-01
  • 作者简介:王运超(1989),男,博士生,主要从事直流输电技术和电力系统过电压仿真方面的研究工作; 余占清(1981),博士,副教授,主要从事电力系统雷电过电压及防护、电磁环境和电磁兼容研究工作; 吴娅妮(1976),女,硕士,工程师,研究方向为电力系统分析与仿真、直流输电和电磁暂态分析; 陈水明(1968),男,博士,教授,博士生导师,主要从事电力系统过电压和电磁环境的教学与科研工作; 曾嵘(1971),男,博士,教授,博士生导师,主要研究方向为交直流输电、长间隙放电、雷电防护、电力系统电磁兼容等; 何金良(1966),男,博士,教授,博士生导师,IEEE Fellow,主要从事输变电技术、电磁环境技术及电介质材料等方面的研究工作; 胡军(1976),男,博士,副教授,主要从事输变电技术和新型电介质材料等方面的研究工作; 刘明松(1980),男,博士,高级工程师,主要研究方向为电力系统分析与控制; 李新年(1977),男,硕士,高级工程师,主要研究方向为电力系统分析与仿真、直流输电和电磁暂态分析。
  • 基金资助:

    国家自然科学基金项目(51477089)

Low Frequency Resonance Analysis of ±1100 kV UHVDC Transmission System

WANG Yunchao1, YU Zhanqing1, WU Yani2, CHEN Shuiming1, ZENG Rong1, HE Jinliang1, HU Jun1, LIU Mingsong2, LI Xinnian2   

  1. 1. State Key Lab of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;2. China Electric Power Research Institute, Beijing 100192, China
  • Online:2015-09-01
  • Supported by:

    Project Supported by National Natural Science Foundation of China(NSFC)(51477089)

摘要:

高压直流输电系统的低频谐振会对系统的安全稳定性造成严重影响,为此分析了±1 100 kV特高压直流工程的回路阻抗与频率的关系及系统工频和二次谐振特性。通过PSCAD/EMTDC仿真得出直流系统回路阻抗特性曲线及其谐振点,得出了输电线路长度对谐振点频率的影响,研究了系统在可能引起二次谐振的故障下的暂态过程,并与以往特高压直流工程对比,得出了输电线路长度与低频谐振现象的关系。分析结果表明,输电线路长度是影响直流系统回路阻抗特性的重要因素,线路越长,系统谐振频率越低;2 000 km为高压直流系统易于发生低频谐振的敏感长度。

关键词: ±, 1 100 kV, 特高压直流, 回路阻抗, 低频谐振

Abstract:

The low frequency resonance of HVDC system may affect the safety and stability of the system operation. This paper studied the relationship between the loop impedance and frequency of ±1 100 kV UHVDC project, as well as its secondary frequency resonance. The characteristic curve of loop impedance and its resonance points were calculated by PSCAD/EMTDC simulation. The impact of transmission line length on the frequency of resonance points was proposed. The transient process of system under the fault that might cause secondary frequency resonance was studied, and the relationship between transmission line length and low frequency resonance phenomenon was obtained through the comparison with other UHVDC projects. The analysis results show that the length of transmission line is an important factor of loop impedance characteristics of DC system. The resonant frequency decreases with the increase of transmission line length; and 2000km is the sensitive length of low frequency resonance of HVDC system.

Key words: ±1 100 kV, HVDC, loop impedance, low frequency resonance

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