An Efficient Power Injection Modeling and Sequential Power Flow Algorithm for FACTS Devices

Abstract

This paper presents a sequential based Newton- Raphson power flow algorithm for reliable and efficiently handling power systems with embedded FACTS (Flexible AC Transmission Systems) devices. Computation and control of power flow in power systems with embedded FACTS devices appear to be fundamental for power system analysis and planning purposes. A power injection model for conventional FACTS devices such as SVC (Static Var Compensator) and TCSC (Thyristor Controlled Series capacitor) as well as modern FACTS devices such as STATCOM (Static Series Compensator) SSSC (Static Synchronous Series Compensator) and UPFC (Unified Power Flow Controller) is derived. Also a power injection model of conventional HVDC (High Voltage Direct Current) is obtained. Then a sequential power flow algorithm (two step algorithm) is adopted. The proposed injection models and sequential power flow algorithm have been programmed and systematically tested in a number of systems. The results of Ward-Hale network are reported which clearly illustrates the Capabilities and generalization of the proposed algorithm.