Advanced SVC models for Newton-Raphson load flow and Newton optimalpower flow studies

摘要

Advanced load flow models for the static VAr compensator (SVC) arenpresented in this paper. The models are incorporated into existing loadnflow (LF) and optimal power flow (OPF) Newton algorithms. Unlike SVCnmodels available in open literature the new models depart from thengenerator representation of the SVC and are based instead on thenvariable shunt susceptance concept. In particular, a SVC model whichnuses the firing angle as the state variable provides key information forncases when the load flow solution is used to initialize other powernsystem applications, e.g., harmonic analysis. The SVC state variablesnare combined with the nodal voltage magnitudes and angles of the networknin a single frame-of-reference for a unified, iterative solution throughnNewton methods. Both algorithms, the LF and the OPF exhibit very strongnconvergence characteristics, regardless of network size and the numbernof controllable devices. Results are presented which demonstrate thenprowess of the new SVC models