Wavelet-Based Multi-Resolution Voltage Controller in a Hybrid AC/DC Microgrid

In this paper, a hybrid AC/DCmicrogrid is studied. Furthermore, different control strategies are defined for most of converters in the islanded and grid-connected modes of microgrid to control the voltage of the DC and AC buses. To have a stable operation, converters controller is also coordinated. The main objective of this paper is to design a wavelet-based multi-resolution PI (MRPI) controller for the voltage control of the hybrid microgrid under large disturbances of the study system. The proposed controller is based on the discrete wavelet transform (DWT) of the error signal between actual and command voltages. Results will show more accurate performance of MRPI controller than the conventional PI controller. Streszczenie. W niniejszej pracy, badana jest hybrydowa siec AC/DC microgrid. Glownym celem niniejszej pracy jest zaprojektowanie falkowej metody sterowania opartej na wielorozdzielczym sterowniku PID (MRPID) sterujący m siecią microgrid w obecności zaburzen ukladu i niepewności. Proponowany sterownik bazuje na dyskretnej transformaty falkowej (DWT) sygnalu bledu pomiedzy napieciem rzeczywistym a ządanym. Wyniki wykazaly dokladniejsze sterowanie kontrolera MRPID w porownaniu z konwencjonalnym regulatorem PI. (Sterowanie napieciem w sieci microgrid z wykorzystaniem transformaty falkowej)

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