A NovelControl of PV Solar Farm as STATCOM (PV-STATCOM) for Increasing Grid Power Transmission

Abstract

During daytime, the invertercapacity left after real power production is used to accomplishthe aforementioned objective. Transient stability studies areconducted on a realistic single machine infinite bus power systemhaving a midpoint located PV-STATCOM using EMTDC/PSCADsimulation software. The PV-STATCOM improves the stabletransmission limits substantially in the night and in the day evenwhile generating large amounts of real power. Power transferincreases are also demonstrated in the same power system for:1) two solar farms operating as PV-STATCOMs and 2) a solarfarm as PV-STATCOM and an inverter-based wind farm withsimilar STATCOM controls. This novel utilization of a PV solarfarm asset can thus improve power transmission limits whichwould have otherwise required expensive additional equipment,such as series/shunt capacitors or separate flexible ac transmissionsystem controllers.