Modeling of STATCOM in Load Flow Formulation

Abstract

This chapter presents an easy modeling of STATCOM into a recent Newton–Raphson (NR) load flow method. This load flow formulation is based on power and current injection mismatches. In this new load flow, the current mismatch equations are used to represent the PQ buses while the power mismatches are used for PV buses. This load flow formulation decreases the required number of equations, the computation time and improves the convergence performance especially in case of PV buses. The developed STATCOM model is considered as an application for the representation of PV buses in the new NR power and current injection mismatches load flow formulation. In this model, the connected buses with STATCOM are converted to PV buses with zero active power generation and the voltage magnitudes are fixed at the pre-request values. The controlled buses are incorporated in load flow algorithm as power injection mismatch equations. The parameters of STATCOM can be calculated during the iterative process using simple equations based on its configuration.