• 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 (3): 1-6.doi: 10.3969/j.issn.1000-7229.2015.03.001

• 理论研究 •    下一篇

MMC-HVDC的稳态运行范围研究

张静1,孙维真1,费建平2,刘明康2,张哲任3,徐政3   

  1. 1.浙江省电力公司,杭州市 310007;2.舟山市电力公司,浙江省舟山市 316021;3.浙江大学电气工程学院,杭州市 310027
  • 出版日期:2015-03-01
  • 作者简介:张静(1980),男,博士,高级工程师,主要从事电网安全稳定运行、直流输电等方面的工作和研究; 孙维真(1963),男,高级工程师,主要从事电网调度与运行等方面的工作和研究; 费建平(1963),男,高级工程师,主要从事电网调度与运行等方面的工作和研究; 刘明康(1980),男,工程师,主要从事电网调度与运行等方面的工作和研究; 张哲任(1988),男,博士研究生,主要研究方向为直流输电与柔性交流输电; 徐政(1962),男,博士,教授,主要研究方向为大规模交直流电力系统分析、直流输电与柔性交流输电、风力发电技术与风电场并网技术。
  • 基金资助:

    国家高技术研究发展计划项目(863计划)(2012AA050205)

Steady-State Operating Range of MMC-HVDC

ZHANG Jing1,SUN Weizhen1,FEI Jianping2,LIU Mingkang2,ZHANG Zheren3,XU Zheng3   

  1. 1. Zhejiang Electric Power Company, Hangzhou 310007, China; 2. Zhoushan Electric Power Company, Zhoushan 316021, Zhejiang Province, China; 3. Department of Electric Engineering, Zhejiang University, Hangzhou 310027, China
  • Online:2015-03-01

摘要:

针对基于模块化多电平换流器的高压直流输电系统(modular multilevel converter based high voltage direct current, MMC-HVDC),研究了交流系统对MMC-HVDC稳态运行范围的影响并且揭示了限制直流功率输送能力的关键因素。首先,文章基于一个单端的MMC-HVDC系统,列写出完整的数学模型。其次,分别研究了交流系统短路比、换流变压器容量和换流站容量对换流站稳态运行范围的影响。最后,研究了并联无功补偿电容器对MMC-HVDC运行范围的影响。计算结果表明,当交流系统短路比较大时,MMC-HVDC的运行范围主要受到换流变压器容量的限制;当交流系统短路比较小时,MMC-HVDC的运行范围主要受到交流系统短路比的限制。此外,无功补偿电容能改善MMC-HVDC的运行范围。

 

关键词: 模块化多电平换流器(MMC), 柔性直流输电, 稳态运行范围, 交流系统短路比, 无功补偿器, 换流变压器容量

Abstract:

This paper studied the influence of AC system on the operating range of MMC-HVDC (modular multilevel converter-high voltage direct current) under steady-state condition, and analyzed the key factors to limit the DC power transmission capacity. Firstly, the equivalent mathematical model of a one-terminal MMC-HVDC was derived. Secondly, the impacts of the short circuit ratio (SCR) of AC system, the capacities of converter transformer and converter station on the steady-state operating range of converter station were studied. Lastly, this paper analyzed the influence of the parallel reactive power compensator on the operating range of MMC-HVDC. The calculation results show that: the operating range of MMC-HVDC is mostly limited by the converter transformer capacity under large SCR of AC system; while the operating range is largely depended on the value of SCR under small SCR. Additionally, the use of reactive power compensator can improve the operating range of MMC-HVDC.

Key words: modular multilevel converter (MMC), VSC-HVDC, steady-state operating range, short circuit ratio , of AC system, reactive power compensator, converter transformer capacity