Abstract
At present, all kinds of power electronic converter input rectifier circuit input
power level generally use the uncontrolled rectifier or phase controlled rectifier circuit.
This kind of rectifier circuit is simple in structure, control technology is mature, but
the AC input power factor is low, and the harmonic currents injected a lot to the
power grid. According to estimates, in developed countries 60% of the electric energy
transformed before use, and this figure reached 95% at the beginning of the century.
Power electronic technology has been widely used in electric power system.
According to estimates, the developed countries in the end users to use electricity,
with more than 60% of the electricity at least after more than once in power electronic
converter device. Power system in the modernization process, the power electronic
technology is one of the key technologies. It is no exaggeration to say that, if you
leave the power electronic technology, power system modernization is unthinkable.
With the development of social production and scientific technology, application
of rectifier circuit in the field of automatic control system, the measuring system and
the generator excitation system is more and more widely. Matlab provides a visual
simulation tool Simulink can directly establish circuit simulation model, changing the
simulation parameters, and can immediately get the simulation results of arbitrary,
intuitive, further saves the programming steps. In this paper, Simulink is used to
model the three-phase full-bridge controlled rectifier circuit, the different control
angle, bridge fault conditions are simulated and analyzed, which deepens the
three-phase full-bridge controlled rectifier circuit theory, it also examines the
foundations for modern power electronic experimental teaching lay a good solid.
The curriculum design for the design of thyristor three-phase bridge controlled
rectifier circuit, compared with three phase half wave rectifier circuit, the power of
three-phase bridge rectifier circuit utilization rate higher, more extensive application.
Key words: electronic power thyristor Simulink three-phase bridge rectifier
circuit