Pwm Rectifier Energy Shaping And Signal Transform Control

With development of power electronics,power electronics equipments have been widely used in modern industrial applications,causing more harmonic pollution.As the interface of the power electronics equipment and the power gird,the conventional rectifiers are the most harmonic source.In order to eliminate the harmonic pollution caused by traditional rectifier including diode-rectifier circuit and phase-controlled rectifier,PWM technology is introduced to rectifier,making the net side current sinusoidal and the rectifier running at unity power factor.PWM rectifier has become a highlight in the field of power electronics.First of all,we review the development of PWM rectifier and energy-shaping control theory,and introduce the theory of passivity system,dissipation system and Hamiltonian system.We describe standard mathematical expressions of the Euler-Lagrange system (EL) and port-controlled Hamiltonian systems with dissipation.The basic and extension energy-shaping control method of PCH are given.Secondly,the three-phase voltage PWM rectifier is selected as study targe,the principle of PWM rectifier is introduced in details.The mathematical model of three-phase voltage PWM rectifier is established in abc,αβ,dq frame references.Based on the model,the current loop and the voltage loop are analyzed using double-loop control method.Thirdly,the SSA model and PCH model of the three-phas PWM rectifier are established.Energy-shaping and extension energy-shaping control method are chosen as the control method.The simulation models are built in simulink toolbox of matlab,and the results prove the correction and applicability of the schemes.At last,the main work of the paper is summarized,and the future research directions are proposed.