Optimization Of Generation And Transmission Maintenance Scheduling For Power System Integrated With Large-scale Wind Farms

With the energy and environmental problems have become increasingly prominent, the government has introduced a series of policies to encourage new energy generation. Wind power, solar power, nuclear power, biomass power generation and other green energy are the trend of development of the power industry. Wind power has been widely development and utilization because its technology is more mature and the reserve is rich in wind energy. However, due to the wind farm output is random, volatility and unpredictability, its large-scale integration will affect the security and stability of power system. Scheduling generation and transmission maintenance is an important component in power system planning. Making a reasonable maintenance scheduling can reduce the failure rate of equipment and is important for the security and reliable operation of power system. Generation and transmission equipment maintenance will affecat the output of generator. If the impact of peaking capacity is not considered when making the plan of generation and transmission maintenance, it may result the demand of system peak capacity in maintenance period is serious shortage. Wind power generally has anti-peaking nature, it will increase the peak load regulation capacity requirement of the system. Therefore, the peak shaving problem is more and more important when making the maintenance scheduling.In this paper, the generation and transmission maintenance scheduling problem of power system is studied. Firstly, based on the analysis of peak load regulation capacity of the system and its requirement, introducing the influence of factors to calculate the equivalent insufficient peaking capacity in order to avoid scheduling maintenance when the demand of peak load regulation capacity is great. An optimization model of unit maintenance scheduling is established, considering the insufficient peaking capacity. Then, based on the analysis of the uncertainty of wind power output, using scenario analysis to build an optimization model of unit maintenance scheduling of the power system with large scale wind farm connected. Finally, on the basis of the detailed exploration of unit maintenance scheduling optimization, by analyzing the impact of generation and transmission maintenance to the output of generator achieves the coordination of generation maintenance and transmission maintenance. An optimization model of generation and transmission maintenance scheduling is established. The simulation results on IEEE-RTS96 system shows the feasibility and effectiveness of the optimization model. The optimization model can solve the generation and transmission maintenance scheduling problem of the power system with large scale wind farm connected.