Reliability Evaluation of Distribution Network Considering Uncertainty of Photovoltaic Generation Output

With the development and utilization of renewable energy, a large number of distributed power sources are connected to the power distribution network, which has changed the reliability calculation models and methods of the original power distribution network. A reliability calculation method for power distribution system based on Markov model and minimum cut set method is proposed. This method can solve the reliability calculation problem of multi-power network when distributed photovoltaic power are running in grid-connected and islanded operation modes. In this paper, the output model of the photovoltaic output power is established, and the sufficient conversion rate in the island is calculated in combination with the time-varying load model. The Markov process is used to study the impact of the dynamic changes on the system reliability. The simulation analysis in the IEEE-RBTS BUS6 shows that the algorithm can quickly and accurately evaluate the reliability of the power distribution system including distributed photovoltaic power.