含多类型电源的电力系统光热发电效益评估方法

光热发电(CSP)在电力系统中发挥的效益与CSP的运行方式、储热时长等密切相关,合理评估CSP效益对CSP的发展具有重要影响。文中提出一种全面评估CSP容量效益、电量效益的等值年费用法,并计及了机组启停、储能电源跨日调节。对含有CSP的系统进行8760 h生产仿真模拟,比较CSP投运前后系统火电装机需求和煤耗的变化,评估CSP的容量效益和电量效益,进而评估CSP的国民经济性。对西北地区实际电网进行仿真,仿真结果验证了所提方法的有效性。研究结果表明:CSP的国民经济效益与CSP的投资、调峰方式、储热时长和新能源发电规模相关。相较于以光热发电量最大为目标的CSP不参与调峰运行,CSP参与调峰运行时其国民经济性更优。

Benefit evaluation of CSP in power system with multiple types of power sources

The operation mode and heat storage time of concentrating solar power (CSP) have a profound impact on the benefits of CSP in power system. It has an important impact on the development of CSP by the reasonable evaluation on the benefits. An equivalent annual cost method for comprehensively evaluating the capacity benefit and electricity benefits of CSP is proposed in this paper. The start-up and shutdown of the unit and the cross-day adjustment of the energy storage power supply are considered by this method. The production simulation for the system with CSP is carried out in 8 760 h. By comparing the changes of thermal power installation demand and system coal consumption before and after the CSP is put into operation, the capacity benefits and electricity energy benefits of the CSP are evaluated, and then the national economy of the CSP is evaluated. Finally, the effectiveness of the proposed method is verified by the simulation of the actual power grid in northwest China. The results show that the national economic benefits of CSP are related to the investment of CSP, the way of peaking, the hour of heat storage and the scale of new energy power generation. The national economy of CSP participating in peak-shaving operation is better than it doesn''t.