Logical Optimization of the Deaerator Water Level Regulation System of a 660 MW Unit
Under the current situation,the common regulation mode of deaerator water level regulation in most power plants is the throttling mode,which is controlled by the frequency conversion of the condensate pump.The deaerator water level regulation is realized by the upper water regulating door through the throttling mode,and then change the regulating flow of the working condition and reduce the increase of local resistance loss.This control mode will increase the energy consumption of the condensate pump in the power plant,and due to the long-term use of the valve throttle,the pipeline performance curve will change,making the deaerator and condenser water level difficult to control.In this paper,the logic of the 660 MW unit of a thermal power plant is optimized as the research object for the deaerator water level regulating modulating control system(MCS).Under the premise of ensuring the minimum pressure requirement of the condensate water user(low warm water,pump sealing water),the deaerator water level regulating valve is opened to 100%,and the pump frequency conversion is used to adjust the water level of the condensate pump.This not only ensures the optimal water amount of the condensate pump to the water level of the deaerator,but also ensures the optimal operation of the power consumption of the condensate pump,so that the condensate adjustment is completely adjusted by the condensate frequency converter to reduce the throttling loss of the condensate system.
condensate systemdeaerator water level regulationmodulating control system(MCS)logic optimization
NETL
NSTL
万方数据
