Journal of South China University of Technology (Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (4): 1-7.doi: 10.3969/j.issn.1000-565X.2017.04.001

• Power & Electrical Engineering •     Next Articles

Influence of Reactive Power Dynamics of HVDC System on Short-Term Voltage Stability

CAI Ze-xiang1 FENG Lei1 YANG Huan-huan1 ZHU Lin1 ZHANG Dong-hui2 ZHOU Bao-rong2   

  1. 1.School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Electric Power Research Institute of China Southern Power Grid,Guangzhou 510080,Guangdong,China
  • Received:2016-05-16 Revised:2016-11-16 Online:2017-04-25 Published:2017-03-01
  • Contact: 蔡泽祥( 1960-) ，男，教授，博士生导师，主要从事电力系统保护、控制与自动化研究． E-mail:epzxcai@scut.edu.cn
  • About author:蔡泽祥( 1960-) ，男，教授，博士生导师，主要从事电力系统保护、控制与自动化研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China( 51407079)

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Abstract:

In this paper,first,the post-fault HVDC ( High-Voltage Direct Current Transmission) reactive power change laws in time domain are analyzed by using the quasi-steady model of HVDC system.Next,the amplitude and time features of reactive power change are explored through simulation.Then,by comparatively analyzing the reactive power change with or without HVDC,the reactive power recovery delaying effect that HVDC reactive power dynamics exert on the induction motor is illustrated,and the mechanism and pathway by which HVDC reactive power dynamics influence the short-term voltage stability are explored.Finally,an index,namely the change rate of critical slip of induction motor,is proposed to evaluate the influence of HVDC reactive power dynamics on the short-term voltage stability,and the effectiveness of the proposed method is verified by an application example on China Southern Power Grid.

Key words: high-voltage direct current transmission, reactive power dynamic characteristic, short-term voltage stability, evaluation index