摘要
A model-assistant extended state observer(MESO)-based decoupling control strategy is proposed for boiler-turbine units in the presence of unknown external disturbance and model-plant mismatch. For ease of implementation, the decoupling compensator is reduced to the proportion integration(PI) decoupler with the frequency domain analysis, where the decoupling error in collusion of uncertainties and disturbances can be estimated by the proposed MESO and then compensated. To decrease the sensitivity of the dynamic error for the decoupling control and fulfill various requirements of constraints, such as safety operation, energy conservation, emission reduction, etc., the plant is transmitted through a scheduled steady state region which is achieved from the optimized reference governor in advance. Simulation results show that the proposed control strategy can well suppress various disturbances including a decoupling error, and multi-objective optimization can meet multiple requirements with the premise of safety production.
面对机炉协调系统出现的未知外部扰动及模型失配问题,提出了基于模型参考的扩增状态观测器的解耦控制策略.其解耦补偿器被简化成可以付诸实施的PI形式的解耦器并在频域下得到验证.而且,解耦误差以及模型不确定性、外部扰动可以被该观测器估计出来,并通过反馈控制器加以补偿.为了降低解耦器对模型误差的敏感度,同时满足诸如安全生产操作、节能减排等更多目标,设计的参考管理器可将被控对象的跟踪设定值优化在平衡点附近.仿真结果表明,所提控制策略可以很好地抑制包含解耦误差在内的多种扰动,同时多目标优化策略可以满足以安全生产为前提的多种要求.
基金
The National Natural Science Foundation of China(No.51576041,51506029)
