基于可靠性跟踪的薄弱环节辨识方法及在省级电网可靠性改善中的应用

可靠性跟踪就是运用跟踪思想确定电网各节点或系统可靠性指标在元件间的分配关系,即确定元件对节点或系统可靠性指标的"贡献"比例,进而对比不同元件对系统不可靠性的贡献大小,辨识电网的薄弱环节。文中运用可靠性跟踪原理,分析了某省电网各元件对系统不可靠性的分摊关系,辨识出四种典型运行方式下系统的薄弱环节,并提出了针对性的两种电网改善方案,通过对改善方案的改善效果进行后评估,验证了基于可靠性跟踪的省级电网薄弱环节辨识方法的正确性和所提出改善措施的合理性。

Weak Part Identification Based on Reliability Tracking Method and Its Application to Reliability Analysis of Provincial Power Network

The reliability tracking is used to determine the distribution relationship between elements and nodes or system index by the use of tracking thought. The weak part could be identified by comparing the contribution of component reliability to system reliability. The technique of determining the contribution of each component to the system unreliability can be used to identify the system weak parts. Based on unreliability-tracing principle, this paper analyzes the contribution of different components to the whole system unreliability and identifies the weak parts which impact system reliability significantly under four typical operation modes; and then proposes the measures to improve the reliability of power supply; the system reliability is evaluated after implementing improvement measures, which prove the validity of the proposed model.