A simplified stability analysis for modern A.C. feeder voltage control using multiple power converters for Shinkansen systems

Recent faster and more frequent train service at Tokaido Shinkansen makes it difficult to stabilize the feeding voltage only by compensating reactive power. Therefore, the active power compensation between two phases has been introduced for further stabilization of the voltage, and the converter control strategy called ¿fixed power-factor method¿ was applied in the commercial operation that started in February 2009. The active power compensation to control a feeder voltage stably is substantially more complicated than the conventional reactive power compensation. This paper describes a novel stability judging method, based on a model including multiple power converters, significant for indicating appropriate active/reactive compensation strategies to the operator of thed new Shinkansen power supply system.