In the most current methods of probabilistic power system production simulation, the\noutput characteristics of new energy power generation (NEPG) has not been comprehensively\nconsidered. In this paper, the power output characteristics of wind power generation and photovoltaic\npower generation are firstly analyzed based on statistical methods according to their historical\noperating data. Then the characteristic indexes and the filtering principle of the NEPG historical\noutput scenarios are introduced with the confidence level, and the calculation model of NEPG�s\ncredible capacity is proposed. Based on this, taking the minimum production costs or the best\nenergy-saving and emission-reduction effect as the optimization objective, the power system\noperation model with large-scale integration of new energy power generation (NEPG) is established\nconsidering the power balance, the electricity balance and the peak balance. Besides, the constraints of\nthe operating characteristics of different power generation types, the maintenance schedule, the load\nreservation, the emergency reservation, the water abandonment and the transmitting capacity\nbetween different areas are also considered. With the proposed power system operation model,\nthe operation simulations are carried out based on the actual Northwest power grid of China, which\nresolves the new energy power accommodations considering different system operating conditions.\nThe simulation results well verify the validity of the proposed power system operation model in the\naccommodation analysis for the power system which is penetrated with large scale NEPG
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