Fault Analysis And Treatment Of Circulating Water Pump In A Thermal Power Plant

Distributed controlsystem(DCS distributed control system)English abbreviation DCS,can also be called distributed control system,is physically divided and distributed in different locations of multiple subsystems integrated system on the function.DCS is based on the computer,the application of network communication technology,computer technology,process control technology,combined with modern information management technology,with decentralized control functions,operational management focused on the characteristics of different application size and requirements,easy to design,Maintenance and operation.The composition of the structure is used independently of the workstations for effective control.Its function is mainly taken by the idea of hierarchical control,and can communicate with the computer system and network system.The complete definition of DCS mainly includes the following:control circuit as the main function;In addition to transmitting and execution unit,all kinds of control functions and communication,man-machine interface adopts digital technology;With computer CRT,keyboard,mouse,trackball,man-machine interface instead of dashboard formation system;Loop control completed by field control station,the system can have more than one field control station,part of each control loop;Man-machine interface by the operator station,the system can have more than one operator station;All on-site control stations,operator station through digital communication network connection.In order to improve the level of automation of power production and improve production efficiency and reduce energy consumption,most of our thermal power plants use DCS system.The decentralized control system is produced and developed with the increasing scale of production and the complexity of production.It is the result of the development of computer technology and automation technology,which conforms to the changes of the capacity and parameters of the unit and the stable and stable operation of the unit.The control of the production process,the control of the production process,the control of the control,the chain protection,the protection of the supermarket chain and the management level and capability of the operation are the current thermal control.System mainstream.The OVATION system and the LN2000 control system belong to the decentralized control system to the specific application.OVATION system is the United States Westinghouse(Westinghouse)in summing up the experience of WDPF distributed processing system on the basis of research and integration of the latest technological achievements,in the second half of 1997 formally put in China's market.LN2000 control system in 2002 first applied to Shandong Weifang power plant water program control,and then in Zaozhuang Shiliquan power plant master control system has been applied.In recent years,with the continuous improvement of related performance,LN2000 control system is stable,the functions of normal operation,in many thermal power units have been more widely used.The circulating water system is an important thermal system in the thermal power unit.The function of the circulating water pump in the thermal power plant is to supply the cooling water to the steam turbine condenser to condense the exhaust steam of the steam turbine,and to the oil cooler,the water cooler,the generator Of the air cooler,etc.to provide cooling water.The pump is one of the most important pumps in power plants.This paper introduces the DCS system features and function of circulating water pump principle,on the basis of the combination of a certain power plant circulating water pump failure,the DCS system in the aspect of fault analysis and processing are studied,reflected its concrete application value.Then combining with all sorts of problems encountered in the scene,discussed in the process of practical application,how to make use of DCS system to analyze and deal with practical problems existing in the production field.