特高压交直流输电系统技术经济分析

Techno-Economic Analysis of UHVAC and UHVDC Power Transmission Systems

提出了1 000 k V交流输电系统提高输电能力,降低成本的参数优化模型,分析了1 000 k V与±800 k V输电系统技术经济性,以中国示范工程数据为基础估算了它们的建设成本,提出了改进的年运行成本法和稳定性成本法并用于1 000 k V与±800 k V输电系统技术经济评估。1 000 k V和±800 k V输电系统,输电距离1 500±2 000 km,按静态(热)稳定输送功率,单位输电建设成本处于相同水平;1 000 k V输电系统的年运行成本明显低于±800 k V输电系统。1 000 k V输电系统暂态稳定输送功率的单位输电建设成本也明显低于±800 k V输电系统。1000 k V输电系统经济性优于±800 k V输电系统。

A parameter optimization model of 1 000 kV UHVAC power transmission system to enhance its power transmission capability and decrease its cost is proposed. The techno-economy of 1 000 kV UHVAC and ±800 kV UHVDC transmission systems are analyzed and based on the data from demonstration projects in China their construction costs are estimated, and an improved annual operating cost method and a stability cost method are put forward and applied in techno-economical assessment on 1 000 kV UHVAC power transmission technology and ±800 kV UHVDC power transmission technology. The construction costs for unit power transmission of 1 000 kV UHVAC and 4-800 kV UHVDC, 1 500-2 000 km power transmission system are at the same level under the transmitted capacity based on static stability; however, the annual operating cost for 1 000 kV UHVAC power transmission system is obviously lower than that for ±800 kV UHVDC power transmission system. Besides, the construction costs of unit power transmission to keep the transient stability of 1 000 kV UHVAC power transmission system is more evidently lower than that for ±800 kV UHVDC power transmission system. The economy of 1 000 kV power transmission system is better than ±800 kV power transmission system.