配电变电站典型接线的可靠性非同调元件辨识

由于配电变电站接线形式、断路器等设备可靠性参数及负荷水平等因素,电力系统中可能存在可靠性非同调元件。辨识出可靠性非同调元件并使其退出运行可有效改善系统可靠性。给出了配电变电站可靠性非同调的定义,以及可靠性非同调概率、频率及非同调电量等指标用以描述系统的可靠性非同调程度,基于变电站电气主接线可靠性评估原理给出配电变电站非同调元件辨识方法。理论分析和算例表明：配电变电站高压侧母联断路器在单台变压器容量满足负荷需求时可能成为可靠性非同调元件,且断路器等设备可靠性参数对系统可靠性非同调特性具有一定影响。

Recognizing the reliability non-coherence components ofdistribution substation typical configuration

Reliability non-coherence components (RNC) may exist in a power system due to the effects of distribution substation connection modes, components reliability performance, load level, and other factors. Recognizing RNCs and removing them from a power system can improve system reliability. The reliability non-coherence phenomenon is analyzed and the reliability non-coherence probability, frequency and energy indices, which can describe the degree of the system reliability non-coherence feature, are proposed. Based on the reliability evaluation theory of substation configuration, recognizing technique of RNCs of distribution substation is proposed. The theoretical analysis and example show that the breaker connects high voltage buses may be the RNC when the rated capacity of one transformer can meet the load requirement, and the reliability parameters of breakers have some effects on the reliability non-coherence features of the typical substation configuration.