Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (12): 120-126.doi: 10.3969/j.issn.1000-565X.2014.12.018

• Power & Electrical Engineering • Previous Articles     Next Articles

Analysis and Control of Unbalanced Load Compensation Capability of Cascaded STATCOM

Tang Zhi-de1 Chen Wei1 Luo Jian1 Deng Ming-feng2   

  1. 1.State Key Laboratory of Power Transmission Equipment and System Security and New Technology,Chongqing University,Chongqing 400030,China; 2.State Grid Fujian Electric Power Research Institute,Fuzhou 350000,Fujian,China
  • Received:2014-06-16 Revised:2014-09-05 Online:2014-12-25 Published:2014-11-17
  • Contact: 唐治德(1958-)，男，教授，主要从事大功率 LED 照明、电力电子等研究． E-mail:cause1861@163.com
  • About author:唐治德(1958-)，男，教授，主要从事大功率 LED 照明、电力电子等研究．
  • Supported by:

     国家自然科学基金资助项目(51277191)

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Abstract:

The cascaded STATCOM with delta configuration plays an important role in the unbalanced load compen-sation,and it is an important means to improve power quality.In this paper,through theoretical analysis,a methodof calculating the compensation range of negative sequence current is proposed for compensating the rated reactivecurrent by using the cascaded 10kV·A/(380V) STATCOM with delta configuration.As the individual phase con-trol of the cascaded STATCOM with delta configuration shows a slow dynamic response and a low precision,the in-dividual sequence control is adopted to handle the cascaded STATCOM with delta configuration,thus realizing acomprehensive compensation for reactive and negative sequence components.Finally,in the Matlab/Simulink envi-ronment,a 10kV·A/(380V) STATCOM with delta configuration is built to simulate the system,and the resultsprove the correctness of the calculation method and the control strategy.

Key words: STATCOM, unbalance compensation, calculation method, compensation range, individual sequencecontrol

CLC Number: