Research Of Control Methods Of Static Var Generator

Recently, Flexible AC Transmission Systems have been widely researched and developed as an efficient technology to improve electric power quality.As one of key technology of FACTS, Static Var Generator has been the hot research topic of today's Flexible AC Transmission equipment because of its effective control and good compensation performance.First, this paper summarizes the development situation and trend of SVG, analyses its principle from different aspects, and introduces typical control methods of direct-current control and indirect-current control. Second, A novel strategy combined the Fuzzy Logic of linear multivariable feedback control to design a controller of SVG to meet the multi-objective demands of power systems is also proposed in this dissertation, and the controller is designed with this strategy. because of variable element, nonlinearity and multi-objective controlling demands of SVG, this paper designs the controller respectively aimed at continuous linear control for voltage maintaining, oscillation damping, improving the transient stability. Results of Simulation based on a single machine to infinite bus system show that the controller has better performance than traditional PI controller in the power system. Finally, the controller based on DSP(TMS320F2812) is designed in this dissertation, and the communication between the controller and the pulse generator was achieved with dual-port RAM, so the control strategy of total digitization is realized really.