电力系统可靠性指标的灵敏度分析

SENSITIVITY ANALYSIS FOR THE RELIABILITY INDICAS OF GERERATION SYSTEM

灵敏度分析是电力系统可靠性分析中的重要一环。传统的递推法在进行灵敏度分析时需针对不同的系统和机组参数作大量重复计算,花费很多的计算时间并占用大量存储单元,使实际应用受到限制。本文基于Gram-darlier展开式和Edgeworth展开式,直接给出了系统可靠性指标对系统负荷和机组参数的偏导数解析表达式,计算简单方便,有广泛应用前景。文中给出了推导过程和LOLE,EENS,F三个基本指标的一、二阶偏导数,具体应用将另文讨论。

Sensitively Analysis is an important pant of generation systen reJiabiJity analysis, Sensitive Analysis based on traditional recursive method needs to be repeated for difference parameters of system and units, and is exhaustive. This paper presents a set of analy hical expression of partial derivatives with nespect to system's load and unit's data based on Gram-Charlier Expansion and Edgeworth expansion. These partial derivatives is easy to calculate and will be found wide use in probabilitie ayalysis of power system.