Research on fuzzy adaptive software phase-locking method based on SRF-PLL
Software phase-locking method is an important engineering technique in fundamental wave measure-ment of power grid.Aiming at the problems of high cost,complex structure,poor dynamic performance and poor robustness of traditional phase-locked loop,the basic principle of synchronous reference frame phase-locked loop(SRF-PLL)is systematic analyzed,and a fuzzy adaptive software phase-locking method based on the structure of SRF-PLL structure is proposed.The simulation research is carried out,the algorithm implemen-tation based on the embedded microcontroller is given,and the hardware joint adjustment test is proceeded.Compared with the traditional SRF-PLL structure phase-locked loop,this method belongs to the whole soft-ware algorithm,which runs stably and has not only better adaptability to nonlinear system parameter changes but also better dynamic performance and robustness.The adjustment principle is simple,easy to modularize and transplant,so it has a good application prospect in electric energy metering and other engineering fields.
fundamental wave measurementsoftware phase-locked loopthree-phase synchronous coordinate systemfuzzy control
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