Analysis on the Impacts of Different Distributed Generation Grid-connected Modes on Power Quality

摘要

This paper propose the power quality evaluation index used to evaluate the impacts of the different distributed generation grid-connected modes made on power quality in the distribution network. Simulation example is built on the basis of a real distribution network as prototype using DigSilent software. Then Comparative analysis of the impacts on voltage deviation, harmonic and short duration voltage fluctuations of decentralized integration mode and centralized integration mode are made. The simulation results show that the centralized mode has more influences on the distribution network power quality, especially when there is power generated by distributed generations flowing to the main grid.