大型火力發(fā)電機(jī)組A級(jí)檢修項(xiàng)目進(jìn)度管理
[Abstract]:At present, in order to improve air quality, many domestic cities change coal-fired power plants into gas-fired power plants. As an important equipment of gas-fired power plant, natural gas booster plays an important role in the safe and stable operation of gas-fired units. At present, the booster control system of domestic gas-fired power plant adopts imported complete sets of PLC equipment and software. The project cost is high, the man-machine interface is not friendly enough, and it is not convenient for the operator and the system maintenance personnel to monitor, analyze and diagnose. Therefore, the technicians of Guohua Gaoantun Gas-fired Power Plant have developed a set of booster control system based on DCS by studying the working principle of centrifugal booster system. This set of control system does not adopt the domestic conventional local PLC control, but uses the host Emerson OVATION DCS as the carrier, which saves the engineering cost. At the same time, this set of control system can conveniently monitor and control the various parameters of the booster. Ensure the safe and stable operation of the system. The smooth implementation and operation of this project has very important engineering practice significance and project promotion significance. Based on the example of Guohua Gaoantun Gas-fired Power Plant, the design and implementation of DCS control system for booster in gas-fired power plant are studied in this paper. Using the method of literature review and theory with practice to carry out research on the subject. First of all, the basic principle of centrifugal booster is studied by consulting relevant literature, combined with the actual situation of the booster in Gaoantun Gas Power Plant, the start-up conditions of centrifugal booster, the coordinated control of each valve in operation, and the step of stopping are discussed. The protection conditions are studied and analyzed one by one. Secondly, the logic design of centrifugal booster control system in Gaoantun Power Plant is carried out by combining theory with practice. The control system adopts sub-module design, including start-stop sequence control logic, compressor inlet guide vane control logic, compressor recirculation valve control logic, interlock protection logic and so on. Finally, Emerson OVATION DCS is chosen as the carrier of the booster control system, and the logic of the DCS control system is built, and the safety and reliability of the control system are verified by debugging. The project implementation scheme of the compressor control system project is put forward, including the establishment of the implementation group, the formulation of the implementation plan, and the improvement of the safety and security measures on the spot. This paper briefly introduces the main problems encountered in the debugging of the booster system and its solutions. The test operation of the booster equipment in Guohua Gaoantun Gas Power Plant for 168 hours was completed by using the DCS control system, and the safety and stability of the control system were verified.
【學(xué)位授予單位】:華北電力大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:F426.61
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