大型火力发电机组A级检修项目进度管理

发布时间：2019-04-03 20:56

【摘要】：目前国内很多城市出于改善空气质量的需要,将区域内燃煤电厂全部改为燃气电厂。天然气增压机作为燃气电厂的重要设备,对燃气机组的安全稳定运行起着至关重要的作用。目前国内燃气电厂的增压机控制系统均采用进口成套PLC设备及软件,项目工程造价高,人机界面不够友好,不便于运行人员及系统维护人员监控、分析及诊断。为此,国华高安屯燃气电厂技术人员通过研究离心式增压机系统的工作原理,自主开发了一套基于主机DCS的增压机控制系统。该套控制系统没有采用国内常规的就地PLC控制,而是采用主机艾默生OVATION DCS作为载体,节省了工程造价,同时该套控制系统能够能方便的监控增压机的各种参数,确保了系统的安全稳定运行。本项目的顺利实施及投运,具有十分重要的工程实践意义和项目推广意义。本文结合国华高安屯燃气电厂工程实例,针对燃气电厂中增压机DCS控制系统的设计与实施来进行研究。采取文献查阅法和理论联系实际法对课题开展研究。首先,通过查阅相关文献对离心式增压机的基本原理进行研究,结合高安屯燃气电厂增压机的实际情况,对离心式增压机的启动条件,运行中各个阀门的协调控制,停机步骤,保护条件逐一进行研究分析。其次,运用理论联系实际方法对高安屯电厂离心式增压机控制系统进行逻辑设计。控制系统采取分模块设计,分别包含启停顺控逻辑,增压机入口导叶控制逻辑,增压机再循环阀控制逻辑,联锁保护逻辑等部分。最后,选用艾默生OVATION DCS作为增压机控制系统的载体,搭建DCS控制系统逻辑,并通过调试验证控制系统的安全性和可靠性。提出了增压机控制系统项目工程实施的方案,包括组建实施小组,制订实施计划,完善现场安全保障措施。简要介绍了在增压机系统调试过程中遇到的主要问题及解决方案。利用所构建的DCS控制系统完成国华高安屯燃气电厂增压机设备168h试运,由此验证该套控制系统的安全性和稳定性。
[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.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：F426.61

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