Hardware Design of
Single-Phase High Power Factor Rectifier
ABSTRACT
In the power system, the voltage and current should be intact sine wave. But in
actual in power system, due to the influence of nonlinear load, the actual grid voltage
and current waveform is always there exists different degree of distortion, to
electricity transmission and distribution system and the nearby other electrical
equipment brings many problems, so it is necessary to take measures to limit the
influence of power grid and other equipment.
High power factor power transformation and the realization of the electric
power load of feedback power is energy-saving key issues. To make voltage source
PWM rectifier nets side presents current source characteristics, and its net side
current control become very important. In PWM rectifier technology development
process, the voltage source PWM rectifier nets side current control strategy are
divided into two kinds: one kind is "indirect current control" strategy; Another kind is
currently the predominant "direct current control" strategy. "Direct current control"
relative to "indirect current control" has a fast current effect and good robustness, this
paper adopts fixed switching frequency triangle wave direct current control method
of comparison.
This paper analyzed single-phase PWM rectifier is deduced, the corresponding
mathematical model and control structure diagram. For single-phase PWM rectifier
modeling difficult and current, voltage control ring PI adjuster design, the difficult
question is proposed based on the classical linear control for nonlinear linearization
and input/output energy conservation combination of single-phase PWM converter PI
adjuster design method. On the current, voltage control respectively the ring
modulators selection and parameter design, and the modified Yang regulator to design
verification. In order to restrain the system output voltage drop and eliminate voltage
harmonic, using mathematical model based on the system of voltage compensation
control of its effective suppression, can get stable and harmonic content is less output
voltage.
This paper of single-phase PWM converter topology structure of system
