Sensitivity of voltage sags to network failure rate improvement

A. Santos, M. T. Barros
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引用次数: 4

Abstract

In this paper, a stochastic approach for predicting voltage sags is applied. The methodology, developed by the authors, allows to characterize network sites by time series of voltage sags, described by amplitude, duration and type. A responsibility sharing curve is used to establish an adequate voltage sag index. The developed methodology is based on Monte Carlo simulation and considers the stochastic nature of power system faults, as well as the probabilistic nature of successful operation of transmission line and busbar primary protection systems. An application example is presented, considering the IEEE Reliability Test System. The sensitivity of the voltage sag index with regard to the transmission lines failure rate is assessed. Results allow to establish a linear dependence, which is used for site characterization, showing that the methodology is an important tool for network planning, design, operation and maintenance. It allows to quantify the benefits obtained, at each network site, from reducing the transmission lines failure rate.
电压跌落对网络故障率提高的敏感性
本文提出了一种预测电压跌落的随机方法。作者开发的方法允许通过电压下降的时间序列来描述网络站点,电压下降的幅度、持续时间和类型。采用责任分担曲线建立适当的电压暂降指数。所开发的方法是基于蒙特卡罗模拟,并考虑了电力系统故障的随机性,以及输电线路和母线一次保护系统成功运行的概率性。以IEEE可靠性测试系统为例,给出了一个应用实例。评估了电压暂降指数对输电线路故障率的敏感性。结果允许建立线性依赖关系,用于站点表征,表明该方法是网络规划、设计、操作和维护的重要工具。它可以量化每个网络站点从降低传输线故障率中获得的收益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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