The Research And Implementation Of Static Var Generator

The existence of reactive power in the power system will lead to large energy loss,and it can damage the stability of power system and lower the quality of power energy.So the operation and safety of power system can be seriously affected.Both industrial manufacture and people's daily life would be influenced by this situation.Therefore,how to compensate the reactive power become increasingly urgent.This thesis research and analyze the principle of SVG device by using various power theories(ie reactive power,power factor,reactive power dynamic compensation),and build the mathematic model of SVG device according to input-output method.Through the analysis of the model we can demonstrate that this system has an excellent stability.This research references and adopts the theory of three-phase Instantaneous reactive power(p-q and ip-iq reactive current test).For control method,using current decoupled control strategy could get a good control of voltage outer loop and current inner loop,and achieve a good control performance of DC side of voltage and the output of reactive current for SVG device.This thesis also research SVPWM modulation technique.Based on theory research,using MATLAB to set up a modeling of SVG device and it is proved that the method adopted in thesis can realize the compensation of reactive power and adjustment of power factor through analysis of simulation result.Set up a hardware experiment platform for SVG device and finish related debugging.For hardware part,it includes main circuit,control system,drive circuit and conditioning circuit;for software part,this system is designed with main routine and several subroutines.After the debugging of hardware circuit and software system,the results are in good agreement with the theoretical analysis and simulation results.