中国电力 ›› 2012, Vol. 45 ›› Issue (3): 28-32.DOI: 10.11930/j.issn.1004-9649.2012.3.28.4

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暂态稳定分析中低压切负荷对仿真结果的影响

李海峰1, 2, 郑静媛3, 徐永海1   

  1. 1. 华北电力大学 电气与电子工程学院,北京 102206;
    2.北京市电力公司 输电公司,北京 100068;
    3. 北京市电力公司 变电公司,北京 100054
  • 收稿日期:2011-08-20 修回日期:2012-01-10 出版日期:2012-03-18 发布日期:2016-02-29
  • 作者简介:李海峰(1980-),男,内蒙古乌兰察布人 ,硕士研究生,从事高压输电线路运行维护工作。

The impact of load shedding characteristic on transient stability analysis

LI Hai-feng1, 2, ZHENG Jing-yuan3, XU Yong-hai1   

  1. 1.School of Electric and Electronic Engineering,North China Electric Power University,Beijing 102206,China;
    2. Transmission Company, Beijing Electric Power Company,Beijing 100068,China;
    3.Transformation Company,Beijing Electric Power Company,Beijing 100054,China
  • Received:2011-08-20 Revised:2012-01-10 Online:2012-03-18 Published:2016-02-29

摘要: 负荷模型对电力系统仿真的结果有重要影响,随着系统中电压敏感负荷的增多,短暂低电压发生时负荷的切除对系统仿真结果的影响不可忽略。东北某变电站记录的大扰动实验时的实测数据表明,系统在低电压发生时存在负荷切除现象。10机39节点系统的仿真说明,切负荷现象对系统仿真结果影响巨大。在分析实测数据和原来综合负荷模型的基础上,通过增加有关低压切负荷因子,成功地模拟了电力系统在低压暂态过程中的掉负荷现象,所提出的新模型为研究电网大电压扰动下的动态稳定提供了借鉴。

关键词: 负荷建模, 模型结构, 暂态稳定分析, 低电压故障, 负荷切除

Abstract: Load model has great impact on power system simulation results. With the increasing number of voltage sensitive loads in the grid, the impact of load shedding due to short time low voltage on the simulation results cannot be ignored. The analysis of field measurement data indicates that load shedding happens during system low voltage. The simulation results of a ten-machine thirty-nine node system shows the importance of load shedding characteristic during transient stability analysis. Based on the analysis of field data and traditional load model, a new load model with load shedding factor was proposed. The proposed model has the ability to describe load shedding characteristic under low voltage and provides guidance for power system dynamic analysis.

Key words: load modeling, load model structure, transient stability analysis, low voltage fault, load shedding

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