| Summary: | 碩士 === 國立交通大學 === 電機工程學系 === 106 === This thesis is presented how three-phase shunt active power filter improve the current distortion caused by the non-linear load, and through its control system to solve the current unbalance and phase fault between three-phase power system.
And also discuss when the energy combined to the three-phase power network, how to improve power factor, compensate reactive power at the same time, in another way, when phase fault or current unbalance in system, how system keeping output current normally.
For the control method, through the line voltage signal feedback and digital phase-locked loop, system can track the phase voltage correctly , the traditional multi-loop feedback control include the DC bus voltage control and output current control, with the DC voltage feedback and input current feedback and, the active power filter can compensate reactive power and compensate improve power factor, also can keeping output current when phase fault happening in power source.
Finally, the proposed control system is implemented in Texas Instruments DSP TMS320F28335 chip to realize the three-phase shunt active power filter control, and the provided simulation and experimental results shows that well performance of the target.
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