For solving the problem of reactive power voltage due to hydropower access to the distribution network

the power planning method adapting to distributed hydropower access to distribution networks is proposed. The hydropower area is divided into abundant hydropower area and smaller hydropower area based on the loading ratio

one typical area is selected respectively and the reactive power optimization simulation model at such four special operation mode in the typical area as abundance in summer

small in winter and small in summer and abundance in winter. The minimum annual expenditure is as the objective function and flow equations

reactive power compensation capacity

reactive power output of generator

transformer taps and voltage amplitude as constraints. The un-planning calculation is performed by the use of catastrophic genetic algorithm to find the most optimized reactive power compensation scheme.Finally

both the capacitive and inductive configuration result of the four kinds of operation modes is summarized and the reactive power planning scheme of adapting distributed hydropower access to the distribution network is obtained.