Study Of Reactive Power Configuration And Voltage Stability For UHVDC Transmission

This paper takes Fujian UHVDC and UHVAC as an example to discuss the reactive power configuration, reactive power control, voltage stability and reactive power coordination of UHVDC and UHVAC. Firstly, a model of Wudongde-Quanzhou UHVDC is built in PSCAD and BPA according to Fujian 2020 planning data. Then the paper analyzes reactive power configuration of inverter, determines reactive power configuration scheme and proposes a switching filters control method. After analyzing static and dynamic voltage stability of inverter bus, author proposes a static voltage stability calculation method according VSI index. Finally a method which uses QPC to regulate reactive power and voltage stability for UHVAC system is proposed and the effectiveness of QPC method is verifed through PSCAD simulation.