CAJ | 학술논문

扩张状态观测器不依赖对象精确模型，可将火电单元机组协调系统中普遍存在的耦合、扰动、不确定性等因素看做一个扩张状态进行估计。设计控制率对该估计量进行补偿，可有效改善系统动态，提高系统性能鲁棒性。以某300 MW燃煤直流炉再热机组为被控对象进行仿真研究。根据实际控制要求，进行设定值跟踪实验，输入扰动实验和蒙特卡洛实验。结果表明，合理选择扩张状态观测器参数，可以使机炉协调系统具有较好的负荷跟踪能力，保证主汽压力在较小范围内波动；同时能有效抑制输入扰动并使系统具有强的鲁棒性。基于扩张状态观测器的协调控制策略结构简单，获得了良好的控制品质，具有工程应用价值。
확장상태관측기불의뢰대상정학모형，가장화전단원궤조협조계통중보편존재적우합、우동、불학정성등인소간주일개확장상태진행고계。설계공제솔대해고계량진행보상，가유효개선계통동태，제고계통성능로봉성。이모300 MW연매직류로재열궤조위피공대상진행방진연구。근거실제공제요구，진행설정치근종실험，수입우동실험화몽특잡락실험。결과표명，합리선택확장상태관측기삼수，가이사궤로협조계통구유교호적부하근종능력，보증주기압력재교소범위내파동；동시능유효억제수입우동병사계통구유강적로봉성。기우확장상태관측기적협조공제책략결구간단，획득료량호적공제품질，구유공정응용개치。
This paper proposes an extended state observer (ESO) based control strategy to effectively reject the coupling, disturbance and uncertainties in the boiler-turbine unit. The parameter tuning rule of ESO and its effect on estimation and noise suppression ability are analysed. A 300 MW coal-fired boiler-turbine unit model is simulated. The results of the set point tracking simulation as well as the perturbation simulation illustrate that with well-tuned ESO parameters, the proposed control strategy achieves satisfactory control results and strong disturbance rejection ability. With ESO, the disturbance and system uncertainties can be estimated as an extended state and then compensated by the control law. Besides, the ESO based controller has simple structure, thus brings a lot convenience in engineering applications.