中国电力 ›› 2015, Vol. 48 ›› Issue (4): 95-100.DOI: 10.11930.2015.4.95

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特高压输电线路并联电抗器补偿方案

商立群1,陈琦12   

  1. 1. 西安科技大学 电气与控制工程学院,陕西 西安 710054;
    2. 江苏省电力公司,江苏 南京 210029
  • 收稿日期:2014-12-29 出版日期:2015-04-25 发布日期:2015-12-03
  • 作者简介:商立群(1968—),男,河南济源人,博士,教授,从事电力系统分析与控制、电力系统过电压、电磁暂态仿真的研究。E-mail: shanglq@xust.edu.cn
  • 基金资助:
    The Project is supported by the Natural Science Basic Research Plan of Shaanxi Province (2014JM2-5077) and the Scientific Research Program Funded by Shaanxi Provincial Education Department (12JK0568).

Research on Three-Phase Shunt Reactor Compensation of UHV Transmission Lines

SHANG Liqun1, CHEN Qi1,2   

  1. 1. School of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China;
    2. Jiangsu Electric Power Corporation, Nanjing 210029, China
  • Received:2014-12-29 Online:2015-04-25 Published:2015-12-03
  • Contact: 陕西省教育厅科研计划资助项目(12JK0568);陕西省自然科学基础研究计划资助项目(2014JM2-5077)

摘要: 在特高压线路中,并联电抗器起限制工频过电压、抑制潜供电流、避免谐振过电压以及无功平衡等作用。首先研究了并联电抗器限制工频过电压的特性,分析计算表明并联电抗器仅可以有效抑制所在端的甩负荷工频过电压,为保障线路沿线电压均分布在允许范围,当线路长度超过550 km时宜采用分段补偿;然后分析了潜供电流和非全相谐振的原理以及它们与补偿度的关系;最后给出了并联电抗器配置的原则和计算方法。

关键词: 特高压, 输电线路, 并联电抗器, 潜供电流, 恢复电压, 非全相谐振过电压

Abstract: The shunt reactor has the function of limiting the power frequency overvoltage, inhibiting secondary arc current, avoiding the resonance overvoltage and keeping reactive power balance in the ultra high voltage(UHV) transmission line. The characteristics of the shunt reactor for limiting power frequency overvoltage are studied firstly, which shows that the shunt reactors can only effectively suppressed the load shedding power frequency overvoltage where the shunt reactors are located. In order to ensure the voltage along the line controlled in the allowable range, sectional compensation should be used for the line of more than 550 km in length. Then an analysis is made on the principle of the secondary arc current and the non full phase resonance and their relationship with the shunt compensation degree. Finally, the configurations principles and calculation methods of shunt reactor are proposed.

Key words: ultra high voltage, transmission line, shunt reactor, secondary arc current, recovery voltage, non full phase resonance overvoltage

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