MODELLING AND SIMULATION OF FACTS CONTROLLERS IN POWER SYSTEM NETWORK

Abstract

Application of FACTS devices in power systems is promising new and more efficient operating scenarios for implementing the transfer of bulk power in a grid. With FACTS devices installed in a power system, methods based on traditional busbar-oriented power flow methods need substantial modifications for handling series line flow control as well as shunt injected powers, as evidenced in the many approaches proposed in the literature. Traditional busbar-oriented power flow algorithms use bus-bar voltage magnitudes and phase angles as independent variables. An alternative line-flow and bus-bar voltage-magnitude based formulation is shown to be more useful in solving the power system with FACTS devices under steady state conditions. Such a formulation permits much greater flexibility in evaluating the FACTS device ratings. All the common FACTS device models are easily incorporated in the new framework. The potential of the alternative formulation is demonstrated through the solution of examples with FACTS devices. In this thesis, the modeling of flexible AC transmission system (FACTS) devices for optimal power flow studies and the role of that modeling in the study of FACTS devices for optimal power flow control are discussed. A number of power flow study programs were developed in order to model various types of FACTS devices. Two main generic types of FACTS devices, SVC and TCSC are suggested and the integration of these devices into Optimal power was implemented.