Study On The Control System Of ASVG Equipment Based On FPGA And DSP

At present, dynamic compensation technique on reactive power becomes one of the most active areas in power electronics field. In this thesis, the control system of Advanced Static Var Generator (ASVG) based on FPGA and DSP development platform is studied deeply.Firstly, several existing reactive power compensation equipment are introduced and compared. Two typical control methods are summarized which include indirect current control method and direct current control. There is several control topologies derived from those two typical methods, whose basic principle are introduced in this thesis. In addition, the instantaneous reactive power theory and its application in ASVG are described.Secondly, the three control topologies derived from direct current control method are discussed in detail, whose simulation models in MATLAB are established accordingly. Their performance in static state and dynamic state are compared and analyzed when they are applied to ASVG control system. The basic principle of voltage space vector pulse width modulation (SVPWM) topology is studied specially, as well as its application to ASVG system. The simulation results indicates that, the direct current control method with SVPWM topology have relatively better compositive performance.The scheme of development platform based on FPGA and DSP chips are introduced. The way to design an ASVG control system based on this platform is analyzed. The FPGA based implementations of digital three phase phase-locked loop module and SVPWM module are discussed specially.In the end, a 400 Kvar ASVG experimental system is designed, on which the experiment is realized based on direct current control method with SVPWM topology. The experiment results are carried out and analyzed.