Study on Statistical Evaluation of Supply Reliability for Distribution Network

Feng Yuyao, Zhang Kaiyu, Min Bo, Yuan Qaunning
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Abstract

The reliability of power supply for users is an actual reflection of power supply enterprises in sustained power supply for users. The current statistical methods of power supply reliability for users adopted currently are mainly based on medium-voltage distribution transformer statistics, which is hard to truly reflect the genuine reliability level for users. This paper has put forward reliability statistical evaluation methods, carried out statistical analysis and calculation to the power supply reliability of medium-voltage users and low-voltage users, and analyzed the impact of different statistical methods for the power supply reliability index. Finally, the feasibility of the calculating modes has been verified by choosing some areas of Shanghai as an example of application, and suggestions on improvement of power supply reliability statistical evaluation for low-voltage users implemented by power supply enterprise have been expounded.
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配电网供电可靠性的统计评估研究
用户供电可靠性是供电企业持续向用户供电的实际体现。目前采用的用户供电可靠性统计方法主要是基于中压配电变压器的统计,难以真实反映用户供电可靠性的真实水平。本文提出了可靠性统计评价方法,对中压用户和低压用户供电可靠性进行了统计分析计算,分析了不同统计方法对供电可靠性指标的影响。最后,以上海市部分地区为应用实例,验证了计算模式的可行性,并阐述了供电企业对低压用户供电可靠性统计评估的改进建议。
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