摘要
在传统大规模电力系统可靠性评估中,为了满足评估精度,往往需要大量的计算,所耗时间极长,评估效率很低,严重制约了可靠性理论在实际电网规划和运行中的应用。提出了一种基于环辐网解耦算法的电力系统可靠性评估方法。通过构建并分析电网拓扑结构,根据电网的结构特点分解为无源辐射网和环网。针对无源辐射网考虑计划检修及容量约束采用最小割集法进行可靠性评估,并对环辐网的边界点进行修正等值。采用序贯蒙特卡洛模拟法对环网进行状态抽样及后果评估,最终得到整个系统的可靠性指标。最后通过算例验证了本方法在保证评估精度的前提下,可大大减少可靠性评估的计算规模,提高评估速度。
In the traditional bulk power system reliability assessment,in order to meet the precision of the assessment,it often takes a lot of calculation and the time-consuming is very long.So the efficiency of the assessment is very low.This makes the reliability theory is difficult to apply in actual power grid planning and operation.To this end,this paper proposes a power system reliability evaluation method based on decoupling ring power grid and radial power grid..By building and analyzing the initial network topology,the paper divides the grid into the ring power grid and radial power grid according to its structural features.Considering the maintenance plan and component capacity constraints,the paper uses minimal cut-set method to evaluate the radial network reliability,and amends the boundary nodes of the ring network and radiation network.In addition,the paper calculates the reliability index of the whole system by using sequential Monte Carlo simulation method to sample the ring network and assesses the consequence.And this method is verified by numerical examples that it can guarantee the assessment accuracy,reduce the amount of calculation,and improve the reliability of evaluation speed.
出处
《陕西电力》
2015年第12期1-5,20,共6页
Shanxi Electric Power
基金
国家高技术研究发展计划项目(863计划)资助(2015AA050102)
国家自然科学基金项目资助(51177078)
关键词
可靠性
环辐网解耦算法
最小割集
蒙特卡洛模拟
reliability
decoupling ring power grid and radial power grid based algorithm
minimal cut-set
Monte Carlo simulation
