Benefit Assessment Of Wind Farms And Generation Expansion Planning Model With Wind Farms

Climate change poses a huge threat to human welfare. Hence, reducing greenhouse gas emissions and developing a low-carbon economy has become a prevailing and inevitable trend. Wind power is an important low-carbon generation and a renewable energy generating mode that can be commercialized at present. Unlike conventional generation sources, wind power is with natures of intermittent, stochastic, and anti-peak-shaving, which could bring great impact to the operation of power system. The methods of estimating the capacity benefit (CB) and electricity benefit (EB) of wind farms are studied. After the studying of how the CB and EB of wind farms affect the objective function and constrains of generation expansion planning model, a generation expansion planning model with large-scale wind farms is put forward.This paper first introduces the characteristic of wind power, and develops a model for the need of generation expansion planning—multi-state units. The impact of random mechanical failure is taken into account, and equivalent load duration curve (ELDC) is used for power system probabilistic production simulation (PSPPS) with wind farms. The capacity benefit of wind farms is presented based on the ELDC. How the penetration, wind distribution and the reliability of system affect the CB are also studied. Based on the PSPPS with wind farms, electricity benefit of wind farms is studied. A detailed analysis of EB is done, and low-carbon is also taken into account.After the studying of how the CB and EB of wind farms affect the objective function and constrains of generation expansion planning model, a generation expansion planning model with large-scale wind farms is proposed, in which the future CO2 markets are also taken into accounted. Heuristic algorithm is used for optimizing the model. An example system's generation expansion planning is done. The sensitivity analyses of the unit investment of wind plants, the price of fuel, the price of CO2 and the discount rate are also studied.The feasibility and validity of methodology and model proposed in this dissertation is proved by numerical examples.