DG planning in stand‐alone microgrid considering stochastic characteristic

To deploy distributed generation (DG) properly in the stand‐alone microgrid, a multi‐type DG planning model considering stochastic characteristic of photovoltaic (PV), wind turbine (WT) and load is established. The annual total cost including the investment cost of DG, the maintenance cost, the fuel cost and the environment compensation cost is taken as objective function, and node voltage boundary, state of charge of battery storage boundary are taken as the main constraints. According to the probability density function of PV, WT and load, the voltage violation ratio of nodes in microgrid is calculated by the probability power flow based on Monte Carlo method. Finally, the optimisation model is solved by the genetic algorithm. The simulation results of a 33‐bus microgrid system case show that the proposed plan strategy has good performance in economy.