配电开关站双链接线模式的可靠性评估方法

Reliability Evaluation Methods for Double-Ring Connection Mode of Switching Station in Distribution Network

为了适应城市重要地区对供电可靠性的要求,开关站双链作为一种结构可靠、运行灵活的新型接线模式,逐步得到广泛应用。有必要研究与之相适应的可靠性评估方法,为采用双链接线模式的开关站设计、建设和运行提供依据。本文提出了一种供电可靠性评估方法,该方法改进了传统的负荷用电有效度计算方法,通过综合考虑高阶失效事件与负荷转移耗时来计算负荷用电有效度,进而计算供电可靠性指标,实现对新型接线模式可靠性的有效评估。最后应用该评估方法对计算模型进行可靠性评估,证明了该方法的有效性、可行性。

To meet the demands of power-supply reliability in central urban areas,double-ring connection mode which is one of the new wiring patterns with more reliable structure and operational feasibility,is getting wider usage. It is necessary to study the reliability of assessment methods appropriate to provide a basis for the construction and operation of the distribution network of the new switching station. The paper presents a new switching station reliability assessment method that improves the original effective electricity load calculation method,considering the high-end failure events and time-consuming to calculate load transfer load electricity validity,and thus reliability index is calculated to achieve an accurate assessment of the reliability of the new connection mode. Finally,the application of the assessment carried out for calculation models demonstrate the effectiveness and feasibility of the method.