Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (8): 9-14.doi: 10.3969/j.issn.1000-565X.2013.08.002

• Power & Electrical Engineering • Previous Articles     Next Articles

A New Method to Evaluate Sensitivity of Sensitive Load to Voltage Sag

Ouyang Sen Shi Yi- li Pan Wei Feng Tian- rui   

  1. School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2012-12-03 Revised:2013-03-13 Online:2013-08-25 Published:2013-07-01
  • Contact: 欧阳森(1974-)，男，博士，副研究员，主要从事电能质量、节能技术与智能电器研究． E-mail:ouyangs@scut.edu.cn
  • About author:欧阳森(1974-)，男，博士，副研究员，主要从事电能质量、节能技术与智能电器研究．
  • Supported by:

    国家自然科学基金重点资助项目(50937001);华南理工大学中央高校基本科研业务费专项资金资助项目(2012ZM0018)

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Abstract:

Proposed in this paper is a new method to evaluate the voltage sag sensitivity (VSS) of the sensitive load by combining several probability density function models,which can fully describe the randomness of the load sen-sitivity.First,five typical probability density functions are deeply analyzed and are used to respectively establish the mathematical model of the voltage tolerance curve of the sensitive load,and the VSS of the sensitive load in the uncertainty region is evaluated respectively by the five models.Then,the weighted sum of the results of the fivemodels is calculated by means of the unbiased variance method.Finally,the rationality and effectiveness of the pro-posed method are verified by simulation results.

Key words: sensitive load, voltage sag, load sensitivity, sensitivity evaluation, probability density function