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http://dx.doi.org/10.7471/ikeee.2019.23.2.675

A Study on the Improvement of Optimal Load Range for Sliding Pressure Operation of coal-fired Power Plant  

Lee, Sang-Hun (Dept. of Mechanical Facility Control Engineering, Korea University of Technology and Educatio)
Wang, Min-Seok (Dept. of Mechanical Facility Control Engineering, Korea University of Technology and Educatio)
Wee, Sang-Bong (Dept. of Mechanical Facility Control Engineering, Korea University of Technology and Educatio)
Son, Yung-Deug (Dept. of Mechanical Facility Control Engineering, Korea University of Technology and Educatio)
Publication Information
Journal of IKEEE / v.23, no.2, 2019 , pp. 675-680 More about this Journal
Abstract
The coal-fired power plant is operated by a combined operation method, which is operated by sliding pressure operation under low load and by fixed pressure operation under high load for improved efficiency. The combined operation is divided into two and three valve open modes. Each plant is operated by selecting the turbine control valve mode in accordance with the manufacturer's recommendation, but is not really operating at the optimal sliding pressure operation according to load range, also Load range of each plant is configured differently. The internal efficiency of the high-pressure turbines is reduced due to loss of the turbine valves and the plant efficiency is reduced. To solve these problems, In this paper, the optimum load range is selected through the analysis method of thermal performance by each load in order to improve the optimum variable pressure operation load range by turbine control valve mode.
Keywords
Power Plant; Turbine; Sliding Pressure; Constant Pressure; Control Valve; 3 Valve; 2 Valve;
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