Techno-economic performance of wind and coal-fired power with CCS joint planning

Non-fossil energy, especially wind power, and carbon capture and storage (CCS) are considered as the critical methods to mitigate CO2 emissions. In the future the coal-fired power plant with CCS can be used to change its output dynamically with the output of wind power to meet the grid dispatch. Therefore, we build up a joint planning model of wind power and coal-fired power with CCS, and analyse its techno-economic performance including the net present value (NPV), the cost of electricity (COE), the CO2 avoided cost as well as CO2 emission in different cases, in which the capacity proportion of wind power and coal-fired power with CCS is varied. The results show that the finance indexes and emission indexes of the joint planning are in contrary trends, especially the wind power proportion less than 0.5. The best economic performance can be achieved for the pure coal-fired power with CCS, but the best performance of CO2 emission mitigation can happen at the wind power proportion of 0.48. When the wind power proportion is very high, more output of coal-fired power is used to meet the grid demand. Therefore, less power can be used to capture CO2, resulting in a higher CO2 emission of the joint planning. Meanwhile, the COE and CO2 avoided cost are very high. Therefore, the very high wind power proportion is not a good idea for the joint planning. (C) 2013 The Authors. Published by Elsevier Ltd.