SIMPLIFIED MODEL SVC IN THE FLOW OF CHARGE WITH CURRENT INJECTION

Abstract

This paper describe Newton-Raphson current injection power flow model of a Static Var Compensator (SVC) to reduce the complexities of the computer load flow program codes of a network containing this device. This model is based on power mismatch approach. The SVC controlled buses in the network are converted to PV buses with zero active power generation at the required voltage magnitudes. The power mismatch equations for these connected buses are included and updated in NR current injection load flow algorithm. While, the load buses are represented by current mismatch equations. Moreover, the parameters of SVC can be calculated using an iterative process and the final value is updated after the convergence is achieved. The developed SVC model enhances the reusability of load flow program by avoiding modifications in the Jacobian matrix. This model is considered the simplest and the best representation of shunt control devices. The feasibility of the SVC model has been validated on the WSCC 9-bus and IEEE 57-bus transmission systems.