### Fractional internal model control of PWM rectifier based on inverted decoupling

LI Xiangyu1, ZHAO Zhicheng1*, WANG Wenyu2

1. 1. School of Electronic Information Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, Shanxi, China;
2. Shanxi Institute of Automation, Taiyuan 030024, Shanxi, China
• Received:2017-08-24 Online:2018-08-20 Published:2017-08-24

Abstract: A novel double closed loop control strategy was proposed for three-phase voltage source PWM rectifier. Based on the mathematical model of PWM rectifier in synchronous rotating coordinate system, the inverted decoupling method was used to realize the complete decoupling of the current loop, and the complicated matrix inversion operation was avoided. According to the principle of internal model control(IMC), the IMC-PI controllers were designed with only one tunable parameter in the inner loop. In the voltage outer loop, a fractional order IMC controller was designed by combining IMC with fractional order control(FOC)method, and the controller parameters were obtained by the cut-off frequency and maximum sensitivity index of the system. The simulation results showed that the proposed method could provide better dynamic performance and disturbance rejection property.

CLC Number:

• TM461
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