廣義强化潮流控制器(GUPFC)靜態潮流模型

Steady state power flow models of Generalized Unified Power Flow Controllers (GUPFC), for large-scale power systems are studied, in details. The GUPFC has a similar structure to the UPFC, several VSCs which are connected back-to-back at their DC terminals, and one of VSCs is shunt-connected at the first bus used to facilitate the capability of the GUPFC. Each of the other VSCs is coupled to a different transmission line through a series coupling transformer, and to provide series reactive compensation to its own line. Mathematical models of the GUPFC, using the d-q axis decompositions of control parameters are derived. In this framework, for each GUPFC, only two control parameters are added to the unknown vector in the iteration formula and the quadratic convergence characteristic is preserved. Simulations results from several practical large-scale power systems embedded with multiple Convertible Static Compensators (CSCs) demonstrate the effectiveness of the proposed models. Comparisons with existing models are made to elucidate the performance of the convergence.