Faced with the optimal operation problem of power system with highpenetration photovoltaics / battery, a coordinated optimization model for power system is established. Firstly, the power output model for photovoltaic system is established, in which the Wasserstein distance is used to calculate the continuous probability distribution of the photovoltaic power output. A variable weighted K means clustering algorithm based on Huffman tree is proposed to cluster the whole photovoltaic scenarios, and the typical photovoltaic power generation scenarios is obtained. Besides that, the simplified kinetic battery model is introduced,which takes into account the depreciation cost of battery. Considering the fuel cost, the startstop cost, the emission cost and the abandoned light, the coordinated optimization model for power systemwith high penetration photovoltaics / battery is established.The model can improve both the capacity of photovoltaic power utilization and the economical and reliable operation of power system in the maximum extent. Finally, a test system is simulated and analyzed by the proposed model, and the results verify the applicability and effectiveness of the model.