Load sharing with thyristor controlled rectifier substations

Thyristor controlled rectifier substations (TCRS) accomplish energy management objectives by controlling load flow. Voltage sources connected in parallel to a common grid share load dynamically in a complex relationship between the DC output voltage sources at fixed traction power substation locations and time variant loads at moving vehicle locations. Conventional diode rectifier sources with inherent voltage regulation produce a load profile that cannot be changed at will. The load profile, and thus the load sensitive cost component of electrical demand is impacted only by train operating policies. Voltage control capability allows the load profile of TCRS to be adjusted within the constraints of train operating practices, and demand-control energy management may be achieved. Efficient solutions to the problems of energy management design require an understanding of the relationships between networked sources and dynamic loads. This paper presents the relationships between demand sensitive electric utility costs, traction power source energy management, and train operations and provides simplified quantitative expressions in support of the basic principles