Research on power quality disturbance source location of distribution network with distributed generation

摘要

The power quality easily infuenced by the voltage sag, short circuit, noise engendered by the distribution network of the distributed generators, and the random power(harmonic wave) output derived from the electric source, leading the varied deviation and oscillation to the electric voltage and decreasing the stability of the operation of the lectric network. According to the topology structure of the distribution network of the distributed generators and the monitored information of the power quality, this paper proposed a disturbance locating model based on the Bayesian networks, analysing the changing rate of the node power output in the electric network and estimating the probablity of the anomaly of the disturbance in order to identify the position of the disturbance accurately. The experimental results illustrate that, with relative accuracy and fault-tolerance, the method proposed in this paper could locate the disturbance affecting the power quality of the distribution network of the distributed generators.