| The development of distributed generation (DG) injects new vigor to the power system, and brings unfavorable factors influencing the power quality of distribution network. Based on the requirement of power quality, the impact of DG to the voltage quality of the distribution network is analyzed; the Dynamic Voltage Restorer (DVR) is introduced in the distribution network to improve the power quality, and then the voltage waveform direct detection method based on mathematical morphology is proposed; Considering that the inverter device of DG and Active Power Filter (APF) have similarity in some respects, such as configuration, detection method and so on, the optimal configuration of DG an APF is realized in this paper, and the synthesis algorithm of current detection instruction and active power instruction of grid-connected DG based on mathematical morphology is put forward; finally the validity of the proposed methods have been testified by simulation results. |
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