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电网技术 ›› 2007, Vol. 31 ›› Issue (22): 30-33 .doi:

• 论文 • 上一篇    下一篇

敏感负荷电压凹陷敏感度的随机估计方法

肖先勇,王希宝,薛丽丽,刘 波,杨洪耕   

  1. 四川大学 电气信息学院,四川省 成都市 610065
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-11-20 发布日期:2007-11-20

A Method to Stochastically Estimate Voltage Sag Sensitivity of Sensitive Equipments

XIAO Xian-yong,WANG Xi-bao,XUE Li-li,LIU Bo,YANG Hong-geng   

  1. School of Electrical Engineering and Information,Sichuan University,Chengdu 610065,Sichuan Province,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-11-20 Published:2007-11-20

摘要:

用正态分布概率密度函数表征负荷电压耐受曲线的随机性,建立了电压耐受曲线和负荷敏感度的随机模型,提出了敏感负荷电压凹陷敏感度的随机估计方法。该方法采用累计求和的方式评估敏感度,避免了对敏感度等级的划分。运用Matlab对敏感负荷的电压凹陷敏感度进行了评估,并与11台计算机的实测结果进行了对比,验证了该方法的正确性和有效性。

关键词: 敏感负荷, 电压凹陷, 敏感度, 概率密度, 随机模型, 评估方法

Abstract:

By means of characterizing the randomicity of voltage-tolerance curve of load by normal distribution probability density function, a stochastic model for voltage-tolerance curve and voltage sensitivity of voltage-sensitive load is established; and a stochastic estimation method for voltage sag sensitivity of voltage-sensitive load is proposed in which the sensitivity is estimated by cumulative summation, therefore the division of sensitivity rank is avoided. By use of Matlab the voltage sag sensitivity of sensitive load is estimated. The estimation results are contrasted with the measured results of 11 personal computers, thus the correctness and effectiveness of the proposed method are validated.

Key words: sensitive load, voltage sag, sensitivity, probability density, stochastic model, estimation method

中图分类号: 

  • TM711
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