摘要
设备电压暂降敏感度评估的难点在于不确定性,包括随机性和模糊性,利用云模型将两者结合起来,综合描述设备电压耐受曲线的综合不确定性,通过云滴将定性的不确定性有效地转换为定量的不确定性,实现了对复杂不确定性的定量刻画。用复化Simpson数值积分法求云滴分布的数值解,再定量计算设备敏感度。对个人计算机的评估结果与现有模糊评估法比较,结果证明了该方法的正确性和准确性,并能更好地揭示设备敏感度的不确定性,有一定的理论价值和应用前景。
The critical problem faced by the evaluation of equipment sensitivity due to voltage sag is the uncertainty including randomness and fuzziness.In this paper,the randomness and fuzzinessa re integrated into a cloud model.This model can present the uncertainty of voltage tolerant curve（VTC）of sensitive equipment roundly.The cloud drop is used to transform the qualitative uncertainty into the quantitative uncertainty,which realizes the quantitative description of complex uncertainty.After the numerical value of cloud drop distribution is obtained by Simpson numerical integral method,the sensitivity of equipment due to voltage sag can be calculated.Comparing the proposed method with existing fuzzy evaluation method,the results showt hat this method is proper and accurate,can present the above mentioned uncertainty more reasonably,and has theoretical value and application prospect.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2011年第4期100-104,共5页
Power System Protection and Control
关键词
电压暂降
设备敏感度
电压耐受曲线
模糊性
随机性
云模型
定性与定量转换
voltage sag
equipment sensitivity
voltage tolerance curve
fuzziness
randomness
cloud model
the transformation between qualitative and quantitative uncertainty
