Power Flow Control Approach to Power Systems with Embedded Facts Devices

This paper focuses on developing a steady-state power flow control approach for systems incorporating flexible ac transmission systems (FACTS) devices. Based on a power injection model of FACTS devices and an optimal power flow model, a novel versatile power flow control approach is formulated, which is capable of implementing power flow control incorporating any FACTS device flexibly. Different from existing FACTS device control approaches, the active and (or) reactive power injections are taken as independent control variables. Using this approach, the Jacobian matrix need not be changed, although various FACTS devices possess different physical models and different control parameters. Furthermore, it allows the efficient integration ofFACTS devices into the existing power system analysis and control programs. Physical limits of the FACTS devices are also considered in the model. Numerical results on a reduced practical system and a 1500-bus practical system with various FACTS devices are presented to illustrate the vigorousness of the proposed approach.