北方民族大学本科毕业论文（设计）
Abstract
With the progress of science and technology and the diversification of rectifiers and
inverters, a large number of high-power power supplies need AC-DC rectifiers to supply
power to the load. Therefore, the research of three-phase voltage source PWM rectifier
technology is proposed, which is of great significance.
In order to further improve the output performance of three-phase PWM rectifier, a three-
phase voltage source PWM rectifier with double closed-loop control is proposed .Because
three-phase voltage source PWM rectifier has the characteristics of high frequency and low
frequency，So a simplified mathematical model of three-phase voltage source current inner
loop and voltage outer loop is established .This model can not only truly reflect the working
state of voltage rectifier, but also be conducive to engineering design. The key of this model
lies in the modeling of three-phase voltage source PWM rectifier system. The mathematical
model of three-phase static coordinate system, the mathematical model of two-phase static
coordinate system and the model of two-phase synchronous rotating coordinate system are
established. According to the design requirements: suppress disturbance, improve the dynamic
and static performance of input and output voltage and current, and design the controller of
the established mathematical model，in this paper, the voltage and current double closed loop
control method is adopted to control the three-phase rectifier, so that the output voltage and
current are stable and meet the requirements, and have anti-disturbance ability. For this
reason, this paper proposes a three-phase rectifier based on three-phase voltage type double
closed-loop control structure, and carried out simulation to verify this process.
Keywords: double closed loop control ， PWM rectifier ， PI
regulator，MATLAB/Simulink，simulation analysis
评论1