Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (10): 139-145.doi: 10.3969/j.issn.1000-565X.2011.10.024

• Power & Electrical Engineering • Previous Articles     Next Articles

Optimal Under-Frequency Load Shedding Considering Distributed Generator and Load Static Characteristics

Liu Zhi-peng1  Wen Fu-shuan2,3  Gerard Ledwich3   

  1. 1. School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China; 3. School of Engineering Systems,Queensland University of Technology,Brisbane 4001,Australia
  • Received:2011-02-21 Revised:2011-06-29 Online:2011-10-25 Published:2011-09-01
  • Contact: 刘志鹏(1983-) ，男，博士生，主要从事分布式发电和最优潮流研究． E-mail:zhipeng.liu09@ gmail.com
  • About author:刘志鹏(1983-) ，男，博士生，主要从事分布式发电和最优潮流研究．
  • Supported by:

    澳大利亚联邦科学与工业研究院智能电网研究项目

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Abstract:

The under-frequency load shedding ( UFLS) is considered as the last effective remedial measure against a severe frequency decline of a power system.Aiming at this issue,an optimal UFLS strategy considering distributed generator ( DGs) and load static characteristics is proposed based on the frequency and its change rate. This strategy consists of several basic rounds and a special round. In the basic rounds,the system emergency can be alleviated by quickly shedding some loads runs by runs according to the feedback control law. In the special round,by optimizing the output power of DGs and adjusting some loads,the system security can be regained and the corresponding ope-rating parameters can be optimized. Finally,the effectiveness of the proposed optimal UFLS strategy is verified with the modified IEEE 37-node test feeder as an example.

Key words: distribution system, distributed generator, under-frequency load shedding, basic round, special round, load static characteristic

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