Development of Ultra-supercritical Power Plant in China

Abstract

According to the increasing demand of energy and environmental requirements, the ultra-supercritical (USC) power plants, with the priority of the high power generation efficiency, reliability, fuel saving, low pollutants emission and advanced technology, have got rapid development in China. In this paper the development history and the state art of the USC power plants were introduced, including the technology transfer, the investment market and R&D programs supported by the government. The investigation shows the necessity and feasibility for the development of the USC units in China. Through the comparisons of the different types pulverized coal-fired power generation plants, the main characteristics of USC power unit were presented. Also the effects of the choice of steam parameters, the type of the boiler and gas turbine and the advanced materials on the operation of the USC units with the high efficiency and under the safety were analyzed. Through the investigation of the design, manufacture facilities, construction and running process of the USC units, the exiting key problems were discussed, together with some helpful suggestion and prospect on the development of the technology route. Keywords: Ultra-supercritical unit, Power generation, Technical and economic analysis, Technology innovation Commission Of China, the demonstration plant for the program is Qin-Bei Power Plant, which parameters are 600MW, 24.4MPa, 566 /566 z The development of ultra supercritical power technology (2002-2005) sponsored by Ministry Of Science and Technology of China, the demonstration plant for the program is Yu-Huan Power Plant, which parameters are 1000MW, 26.25MPa, 600 /600There are five sub-programs for the second sponsored program, which listed as the following:z The global analyze of USC parameters and technology applied in China.zThe key technology of USC boiler. zThe key technology of USC steam turbine. zThe study of flue gas purification. zThe design and operation technology of USC power plant.All the R&D projects are organized in different members including of power generation companies, equipment manufacturers, institutes and universities, etc. Based on the research results, the strategic and schedule to develop USC technologies are carefully prepared in the next 5-year schedule in China. Currently, the project research focus on the USC type selection, design and calculation, manufacturing, processing technology and flue gas purification, etc. Some of key achievements on R&D of USC technologies have already applied to the actual project. In addition, a number of patents have been approved.z The project research supported by the state promoted the development of the power industry.z Improvement of the design, manufacture facilities and technologies.z Formed a professional team of high level in technology and management.

Study of the Energy Consumption Characteristic of a 1000MW Ultra-Supercritical Unit

“…A new generation of high-capacity ultra-supercritical units has excellent economic, environmental and starting peaking operational performance, and remains high efficiency even in the low load. From our national conditions, the development of ultra-supercritical units could reduce China's average coal consumption, and improve the stability and economy of power grid peak regulation [1,2].…”