Abstract
Three-phase voltage-source pulse width modulation (PWM) rectifier has been widely employed in various industrial applications. For the traditional dual-loop PI control of three-phase voltage-source PWM rectifier, the voltage loop and current loop have poor disturbance rejection performance and long response time. A linear active disturbance rejection control (LADRC) strategy is proposed for three-phase voltage-source PWM rectifier in this paper. The coupling variable and external disturbance in the model of PWM rectifier are observed and compensated by linear extended state observer (LESO) in two-phase synchronous reference frame. The LADRC outer-voltage loop controller and LADRC inner-current loop controller of PWM rectifier are designed. The proposed control strategy is compared and verified with PI control and ADRC by MATLAB/Simulink. Simulation and experimental results confirm the superiority of proposed control strategy in dynamic performance and disturbance rejection.
Highlights
As a highly efficient and reliable power converter, the threephase voltage source pulse width modulation (PWM) rectifier has the advantages of unit power factor operation, low input current harmonic content, controllable DC side voltage, and bidirectional flow of energy
The PI control strategy was always adopted in case of the controller for PWM rectifier, it was hard to satisfy with the PI control strategy for its slow dynamic response speed and sensitive to disturbances
DESIGN OF linear active disturbance rejection control (LADRC) SCHEME The structure of active disturbance rejection control (ADRC) is shown in Fig.3, and it mainly consists of three parts: tracking differentiator (TD), extended state observer (ESO) and nonlinear state error feedback (NLSEF)
Summary
As a highly efficient and reliable power converter, the threephase voltage source pulse width modulation (PWM) rectifier has the advantages of unit power factor operation, low input current harmonic content, controllable DC side voltage, and bidirectional flow of energy. CONTROL STRATEGY OF THE THREE-PHASE VOLTAGE-SOURCE PWM RECTIFIER In order to improve the control performance of PWM rectifier, a control scheme of LADRC is proposed in this paper. A. DESIGN OF LADRC SCHEME The structure of ADRC is shown in Fig., and it mainly consists of three parts: tracking differentiator (TD), extended state observer (ESO) and nonlinear state error feedback (NLSEF). It mainly consists of a linear tracking differentiator (LTD), a linear extended state observer (LESO), and a linear state error feedback (LSEF) control law. According to the LADRC theory, if the coupling terms are regarded as the internal disturbance of the system, the LESO is used to observe and compensate, the complete decoupling control of d and q-axis currents can be realized. The function g(x) can be presented as: g[x1 (k )
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
