Propagation mechanisms research of harmonics produced by distributed generations in distribution network

In this paper, models of distributed generations and distribution network are built in MATLAB and simulation results under several cases are given. An equivalent mathematical model at access point of distributed generation is built, based on which, the propagation mechanisms of harmonics produced by distributed generations in distribution network is analyzed. It is concluded that THDi may be no more suitable for harmonic evaluation in distributed network containing distributed generations. This paper provides some reference value for analyzing and managing harmonics.