Application of Risk Evaluation to Selecting Substation Configurations

Substations and switching stations are critical segments in power systems. The fundamental principles in selection of substation configurations are reliability, economy, and flexibility in design and operation. This chapter describes a method to perform the risk assessment for a combinative system consisting of transmission network and substation configurations. The load curtailment model for a combinative system of transmission network and substation configuration is illustrated. The chapter summarizes the risk evaluation approach and the economic analysis concept. Three examples are given in the chapter. The first one is an application of the approach to selecting substation configuration. The second one is the evaluation of effects of substation configuration changes on the risks of both source and load points. The third one provides an application of the presented method to the determination of a transmission line arrangement supplying two substations.