摘要
提出了一种用于配电系统电压衰减的概率评估方法。该方法的研究基础是对在配电网发生故障时,母线上的残余电压进行解析分析,并以线路的故障率为基础,应用概率方法估计母线电压在给定时间内下降至指定阈值以下的次数,从而为供电系统的供电安全和供电质量的分析提供依据。对所给实例进行仿真研究,并与常用方法(如故障位置法)进行比较。分析表明,本文方法所得结果可避免故障位置及数量的不确定性的影响,能使用于各种类型的配电网络、故障模式以及沿线路的不同故障分布。
The stochastic assessment method is presented for voltage sags of power distribution system.Based on analytical solution to remaining voltage of system buses when faults take place at transmission lines and the fault rates of transmission lines, the number of voltage sags within thresholds is evaluated.The proposed method constitutes analyzing tools for electric power supply security and quality. The simulation for given example is carried out in comparison with conventional method such as fault position method. The analysis shows that, to avoid influence of the uncertainty of fault position and number, the proposed method is applicable to different type of power distribution network, fault mode and fault distributions probability along transmission lines.
出处
《电工技术学报》
EI
CSCD
北大核心
2008年第10期129-134,共6页
Transactions of China Electrotechnical Society
基金
湖南省自然科学基金资助项目(07JJ6095)。
关键词
配电系统
供电安全
电能质量
电压衰减
概率方法
Power distribution, power supply security, power quality, voltage sags, stochastic method
