Abstract
In the most current methods of probabilistic power system production simulation, the output characteristics of new energy power generation (NEPG) has not been comprehensively considered. In this paper, the power output characteristics of wind power generation and photovoltaic power generation are firstly analyzed based on statistical methods according to their historical operating data. Then the characteristic indexes and the filtering principle of the NEPG historical output scenarios are introduced with the confidence level, and the calculation model of NEPG’s credible capacity is proposed. Based on this, taking the minimum production costs or the best energy-saving and emission-reduction effect as the optimization objective, the power system operation model with large-scale integration of new energy power generation (NEPG) is established considering the power balance, the electricity balance and the peak balance. Besides, the constraints of the operating characteristics of different power generation types, the maintenance schedule, the load reservation, the emergency reservation, the water abandonment and the transmitting capacity between different areas are also considered. With the proposed power system operation model, the operation simulations are carried out based on the actual Northwest power grid of China, which resolves the new energy power accommodations considering different system operating conditions. The simulation results well verify the validity of the proposed power system operation model in the accommodation analysis for the power system which is penetrated with large scale NEPG.
Highlights
The technique of power system operation simulation is commonly used to simulate the annual and monthly operating states of all the power generation in a system considering the different boundary conditions of the actual power grid, the different operating characteristics of all kinds of generators, and the utilization efficiency of the new energy power generation (NEPG) and the hydroelectric power generation [1,2,3]
This paper aims to propose an effective power system operation model which considers the operation characteristics of large-scale NEPG and is adaptive for the peak optimization analysis and new energy power accommodation assessment
Based on the power system operation model proposed in this paper, the power output characteristic of NEPG has been taken into full consideration in the optimization process of our power system operation simulation
Summary
The technique of power system operation simulation is commonly used to simulate the annual and monthly operating states of all the power generation in a system considering the different boundary conditions of the actual power grid, the different operating characteristics of all kinds of generators, and the utilization efficiency of the new energy power generation (NEPG) and the hydroelectric power generation [1,2,3]. An appropriate operation model of a power system considering large-scale integrated NEPG is of great significance for the study of the power system peak regulation ability investigation and the power generation accommodation assessment. The multi-state generator modelling method can reflect well the randomness of power output and gauge the impacts of forced outages on the system reliability and production costs [16]. This paper aims to propose an effective power system operation model which considers the operation characteristics of large-scale NEPG and is adaptive for the peak optimization analysis and new energy power accommodation assessment. The operation model of power system with large-scale NEPG integrated is established considering the optimization objectives of minimum total costs of the power system and the power balance constraints. The validity of the proposed power system operation model in NEPG accommodation analysis of the power system with large scale NEPG penetration has been well verified
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