Study On Direct Current Dsp Control Of The Three Phase Volatge Source Ac/dc Converter

Eliminating harmonic pollution and improving power factor are the quite important task in the field of power electronics. Due to the prodigious proportion of medium and big electronic equipment in power line, the research of three phase reversible converter is becoming the researching hotpot on international and native.Beginning from the point of view of control, the reversible converter抯 control ways are summarized and their feature are pointed out. The current decouple control of direct current control strategy is selected as the control way.On the basis of Deducing the reversible converter抯 mathematical model, the Matlab simulation model is achieved, and the open loop simulation on the condition of ignoring the high order harmonics and no ignoring high order harmonics is done, testifying the reversible converter抯 feature can be reflected by this simulation model.For the direct current decouple controller, the P1 adjustor抯 parameter of current and voltage loop抯 is designed. The correction of the designed parameter is testified by simulating on two phase synchronization coordinate and three phase stationary coordinate, the simulation wave is given.The voltage space vector is selected as the PWM method. Its theory is described in detail, and the relationship between SVPWM and the common PWM is aiven. The compare of three different SVPWM methods is also done and the real-time algorithm realization in DSP is given. The correction of the algorithm is testified by PWIvI waves.For the requirement of real-control, the control algorithm is wrote with the TI company抯 common digital signal processor TMS320F240,so the real-control to the reversible converter is realized. The structure of the software and the features of each module have been introduced and the program flowcharts are given. Finaii;?the PWM waves are given.