Application Research Of DCS System Based On Windows NT 4.0 In Thermal Power Station

In order to solve the adverse effect to security and economy of the unit,which is caused by steam quality because of internal and external disturbance in thermal power plant, The text is based on a sketch summary of domestic and international thermal technology auto-control and DCS control system development direction, using the advanced strategy and the flexible configuration of DCS functional block, utilizing the thought of state and vector quantity control, design the temperature system again. Divide the whole control strategy into several vector quantity control modules, utilizing the function of every function module in whole control ling course, succeeding in solving large-scale thermal power plant overheated, hotter temperature delay, not line shape, many variable, the control quality problem. Though testing, the putting into rate of automatic return circuit of overheated, hotter temperature is more than 99%. It not only improves the dependability of the temperature control system but also makes the temperature control quality get great improvement.