A dispatch strategy for an interline power flow controller operating at rated capacity

The maximum dispatch benefit of an interline power flow controller (IPFC) often occurs when it operates at its rated capacity and line flow setpoint regulation is no longer possible. This paper uses injected voltage sources to directly model an IPFC and impose the rating limits in a Newton-Raphson load flow algorithm. A dispatch strategy is proposed for an IPFC operating at rated capacity, in which the power circulation between the two series converters is used as the parameter to optimize the voltage profile and power transfer. Voltage stability curves for two test systems are shown to illustrate the effectiveness of this proposed strategy.