Single DCS Based Control Configurations For The Whole Process Of Coal-fired Power Plants

DCS,as the core control system of coal-fired power plant,has achieved great improvements on the device itself,system stability and operation maintance as a result of the development in recent years.With the successful use of DCS in the 300 MW,600MW and 1000 MW utility boiler,there is no doubt that DCS is becoming an extremely important part of coal-fired power plant system control and with no exaggeration,and the brain of the entire power plant,ensuring safe,reliable and economical operation of the power plant.As the core of coal-fired power plant control system,DCS with its system stability and function expansibility reflects the important factor of coal-fired power plant control level.DCS optimizes “island control” of all auxiliary systems traditionally done by PLC into integratied control of all plant devices,such as boiler,steam turbine,electrical device,and ovarious auxiliary systems as well as the systems of desulfurization and denitrification,thus playing an extremely important role in the development of coal-fired power control.This paper,in combination with the project of “Bai Tao Chongqing Chemical Industry Park Cogeneration New Project”,aims at realization of the whole process integrated control based on a single DCS.First,DCS integrated control of the whole process for coal-fired power plant is explanated.Specifically,hardware configuration and software configuration are described in more details.Then,performance calculations are carried out to verify the feasibility of single DCS integrated control,which demonstrate the advatages of single DCS-based integrated control over traditional control schemes.Finally,an installation example of the proposed control configurations is presented.