The Control Technology And Application Of APS Of Stage Two 350MW Units In Guohua Zhoushan Power Plant

With more and more high degree of automation of thermal power plant, thermal power plant is also getting higher and higher requirements for the automation process unit startup, the start-up of the unit must meet the fast, stable and safety requirements. In order to achieve this goal, it is necessary to achieve a button to start and stop in the control function. In order to realize the control of automatic control unit from the equipment to the system control process to the comprehensive function units, namely "one button start and stop", need to have the logical algorithm full process and full automatic requirements as the basis.Since the start stop control system of thermal power unit(APS) is one of the most new development directions of thermal automation technology. APS AutomaticPower Plant Start Up And Shutdown System, can make the unit equipment in accordance with the provisions of the program start stop operation, it can not only simplify the operator’s work, specification for start stop operation, reduce the occurrence of misoperation may improve the safety and reliability of unit operation, but also shorten the start time of the unit, improve unit economic benefit. Therefore, to realize the large capacity supercritical unit from the start and stop function has certain social value and economic benefit.This paper mainly introduces the significance and necessity of APS control system,as well as the status quo and trend of the development of the APS control strategy based on the development of the domestic and international situation. Taking the two stage350 MW unit of Zhou Shan power plant as an example, the paper gives a brief introduction to the thermal control system and the general situation of the project, and expounds the understanding of the key technologies of APS, including system framework design, functional group control design, etc.. Followed by EPRI and DCS manufacturers to communicate and improve control logic, this paper lists function configuration and step sequence, such as condensation water system control, smoke wind control technology, fuel control technology, control strategy. Finally, the technical difficulties encountered in the engineering practice and the influence of the external factors are summarized...