Research On Parameter Adaptive Control Strategy Of Self-charging Series Voltage Transient Variation Compensator

With the rapid development of the electronic technology,power electronics technology and modern information technology,the constant increasing of all kinds of nonlinear load ratio,the expanding of the modern power grid scale,the increasing complexity and intelligence development has become increasingly apparent,those reasons make the electric power enterprise,power users and all kinds of equipment manufacturers increasingly concern about the power quality.Voltage transient variation has been proved to be the most important power quality problems which affect many electrical equipment,especially the normal and safe operation of a large number of sensitive loads.At present,scholars studied many voltage transient variation compensator which can improve the power quality,such as DVR,UPQC,UPS,Dy SC and so on.This paper is based on the study of the current domestic and foreign related series voltage transient variation compensators,combined with the previous research work in our laboratory,the following several aspects about the self-charging series voltage transient variation compensator have been researched.1.Analyzed the mathematical model of the device,the whole control structure of the system and the controller design under the condition of specific surplus of power grid voltage and load parameters.Because the controlled object parameters of the devices of busbar voltage symmetric ring and busbar voltage amplitude constant ring depend on the parameters of the power grid voltage and load,improved the parameter adaptive control strategy,designed the parameters adaptive controller,studied the method of detect the power grid voltage amplitude load parameters.2.Studied the factors that affect the device's dynamic compensation depth,as well as the double closed-loop control method of using the load power factor controller to increase the compensation depth.3.Designed the hardware circuit of this system,including main circuit,control circuit,drive circuit,voltage detection circuit,current detection circuit and so on.At the same time,designed the software of the system,including the software resource configuration,the main program and interrupt program.4.Based on the MATLAB/Simulink,carried on the simulation and experimental study of this device to verify the effectiveness and correctness of the parameter adaptive control strategy.