摘要：Described in the paper are the structures of water level controls in power boiler drums.A boiler drum’s function is very important for the power unit process,because this is where water separates from steam,which is then superheated and supplied to the turbine.A boiler drum’s dynamic properties as an object of regulation have been listed.The model has been identified on the basis of measurement data from a real object.In the described system the control and measurement devices’ working conditions are difficult due to high temperature and pressure.Incorrect operation of the control system could lead to a major accident.A performance analysis has been presented of three controller level structures,to ensure the system’s stable operation.
关键词：control system;steam boiler;power unit;level control;drum;drum model
