VOLTAGE STABILITY INDEX-BASED REACTIVE POWER COMPENSATION SCHEME

摘要

Reports of various committees set up to review the 2003rnNorth American major power outages pointed out that arnmajor exacerbating factor has been lack of situationalrnawareness by power system operators. To improve reactivernpower compensation and contribute to the mitigation ofrnpower outages associated with the present near-limitrnoperated commercialized grid, a bus voltage stability (BVS)rnindex based reactive power compensation scheme has beenrndeveloped. BVS index is a hybrid voltage stabilityrncomputation model involving the two machine modeled Lindexrnand a complex power Π-transmission line structurernmodeled Ls-index developed by the authors. The currentrnregional wheeling of power across transmission distance farrnbeyond the two machine model has necessitated therndevelopment of a novel Ls-index model suitable for longrnlines. The composite scheme was then incorporated intornNewton-Raphson?s (N-R) power flow which encompassesrnmultiple shunt devices (multi-shunt). This arrangementrnprovided a knowledge based system for power systemrnmonitoring. Results obtained from applying the developedrnmodels and schemes in the IEEE 300 bus system with zoningrnand under varying operating conditions showed the system?srncapability to provide improved system monitoring andrnoptimal compensation based on availability.