新型电力系统中光热电站完全替代火电规划研究

Solar thermal power stations generate electricity smoothly. As energy-limited power stations, they are weak in participating in power balance at full capacity, and limited in supporting/sustaining their power capacity seasonally. Based on the daily equivalent guaranteed hours of the solar thermal power station and the demand of the system during the peak hours, this paper proposes a method for evaluating the ability of the solar thermal power to replace the thermal power installed capacity, and then suggests a method to completely substitute the thermal power installed capacity by adding the emergency boiler backup power generation to cope with the extreme weather and gives the solutions to the seasonal power outages. The calculation example of the power system in Qinghai province shows that the solar thermal power station can cope with the extreme weather and the imbalance of the seasonal power supply by adding some emergency backup boilers. Therefore, the thermal power installed capacity is replaced with full capacity and at all times, at the same time, most of the power generation is ensured to be the Renewable Energy. The research results in this paper may help the solar thermal power stations realize large-scale renewable energy development with a small amount of low-carbon energy, which has important demonstration significance in new power systems.