Title :
Study of EMU Auxiliary Inverter Double-Loop Control Strategy with PR Controller in Nonlinear Load Condition
Author :
Du Huiqing ; Wang Lei
Author_Institution :
Sch. of Electr. Eng., Beijing Jiaotong Univ., Beijing, China
Abstract :
As the main nonlinear load of EMU auxiliary inverter, battery charger has a great impact on the quality of inverter´s output voltage. Based on the nonlinear load harmonic model, this paper analyses the theory of AC side voltage distortion caused by 3-phase uncontrolled rectifier load, and proposes a double-loop control strategy with load current voltage reference feed-forwards. The strategy is established from 3-phase SVPWM inverter in synchronous rotating reference system. Furthermore, output voltage distortion is eliminated with a proportional resonant (PR) controller. Finally, it turns out to be reliable and feasible to apply the control strategy after being tested with virtual DSP simulation model set with MATLAB, and on a 3KVA experimental prototype.
Keywords :
PWM invertors; battery chargers; distortion; 3-phase SVPWM inverter; 3-phase uncontrolled rectifier load; 3KVA experimental prototype; AC side voltage distortion; EMU auxiliary inverter double-loop control strategy; MATLAB; PR controller; battery charger; nonlinear load condition; nonlinear load harmonic model; output voltage distortion; proportional resonant controller; synchronous rotating reference system; virtual DSP simulation model set; Control systems; Harmonic analysis; Impedance; Inverters; Mathematical model; Power harmonic filters; Voltage control; Auxiliary Inverter; Double-loop Control; Nonlinear Load; Proportional Resonant Controller;
Conference_Titel :
Digital Manufacturing and Automation (ICDMA), 2013 Fourth International Conference on
Conference_Location :
Qingdao
DOI :
10.1109/ICDMA.2013.294