Reliability Assessment of Distribution Network System Considering Output Uncertainties of Distributed Generators

摘要

In view of the effect of DGs uncertainty on the reliability of the distribution network system, an integrated Markov model is put forward to evaluate the reliability of distribution network, considering the randomness of DG, DG mechanical failure rate and starting/switching refuse rate and other factors; In view of the randomness of the output of photovoltaic power, using the Cornish Fisher expansion method to generate the standard normal distribution of sample space in order to further analysis the effects of illumination intensity correlation coefficient of distribution system reliability. Through the simulation analysis of BUS6 IEEE-RBTS system, the simulation results show that the reliability of distribution network system is closely related to the distributed power access point, the DG capacity and the DG output correlation coefficient.