针对1000MW燃煤机组干式电除尘器能耗高及未实现浓度闭环控制的问题，本论文进行了电除尘器出口烟尘浓度闭环控制方法研究。首先，针对五电场结构的干式电除尘器，提出了一种前三级电场前馈控制与末二级电场反馈控制相结合的烟尘浓度控制策略。该策略采用内模PID(IMC-PID)参数整定方法整定PID控制器参数，并在PID反馈控制基础上加入干扰观测器提高系统的抗干扰能力。最后采用模糊加权切换的方法实现各负荷点模型控制作用之间的平滑切换。仿真和试验研究结果表明，论文提出的控制方法能够实现干式电除尘器出口烟尘浓度的定值控制并具有较好的控制品质。针对 1000MW 燃煤机组干式电除尘器能耗高及未实现浓度闭环控制的问题，进 行了电除尘器出口烟尘浓度闭环控制方法研究。首先，针对五电场结构的干式电除尘 器，提出了一种前三级电场前馈控制与末二级电场反馈闭环控制相结合的烟尘浓度控制 策略。该策略采用内模比例积分微分 ( IMC-PID) 参数整定方法整定 PID 控制器参数， 并在 PID 反馈控制基础上加入干扰观测器提高系统的抗干扰能力。最后采用模糊加权方 法实现各负荷点模型控制作用之间的平滑切换。仿真和试验研究结果表明，文中提出的 闭环控制方法能够实现宽负荷燃煤机组干式电除尘器出口烟尘浓度的定值控制，具有较 好的控制品质。

Closed-loop control method of electrostatic precipitator outlet dust concentration was studied to solve the problems of high energy consumption of dry electrostatic precipitator in 1000 MW coal-fired units and the failure to achieve closed-loop control of concentration． Firstly，for dry electrostatic precipitator with a five-field structure，a concentration control method combining feedforward control of the first three-stage electric fields and closed-loop control of the last two-stage electric field was proposed． The IMC-PID parameter setting method was used to set the PID ( Proportional Integral Derivative) controller parameters，and a disturbance observer was added to the PID controller to enhance the anti-disturbance ability of the system． Finally，the method of fuzzy weighted switching was used to achieve smooth switching between the control functions of each load point model． The simulation and experimental results show that the proposed control method can realize the fixed value control of electrostatic precipitator outlet dust concentration and has good performance．