单抽汽轮机热电耦合的模糊解耦控制  

Fuzzy decoupling control of thermo-electric coupling single extraction turbine

作　　者：李艳[1,2] 拓福婷 刘丽芳[3] 

机构地区：[1]陕西科技大学电气与信息工程学院,陕西西安710021 [2]陕西农产品加工技术研究院,陕西西安710021 [3]陕西科技大学职业教育师范学院,陕西西安710021

出　　处：《陕西科技大学学报》2017年第3期159-165,共7页Journal of Shaanxi University of Science & Technology

基　　金：陕西省科技厅科学技术研究发展计划项目(2013K07-28);陕西省教育厅专项科研计划项目(14JK1094)

摘　　要：抽汽式汽轮机存在着热负荷、电负荷之间的强耦合以及参数的不确定性问题,其中任一负荷的变化都会引起另一个的波动,进而影响整个汽轮机控制系统的性能.针对上述问题,以某造纸厂热电厂6 MW单抽汽轮机为例,在分析其工作原理的基础上应用机理法建立了系统数学模型.其次,分析了其强耦合特性,根据实际需要设计了模糊解耦控制方法以实现热电解耦及提高系统适应性.最后,进行了Matlab/Simulink仿真实验,结果表明,与常规对角解耦相比,该方法在强耦合及模型参数存在一定波动时,仍能保证较好的稳定性及鲁棒性.Parameter uncertainty and serious coupling relationship exists between heat load and electric load are two major problem in extraction steam turbine,a small change in either load of the two will cause further lluctuations, thereby affecting the performance of the tur-bine control system. To solve these problems, taking a 6 MW single extraction steam turbine from power plant of a paper mil as a case. Based on the analysis of its working principle we establish a mathematical model. Then,we analysis its strong coupling characteristics,and de-sign a fuzzy decoupling control method to achieve decoupling and improve the thermoelectric system adaptability, according to the actual need . Finally, the Matlab / Simulink simulation results show that, compared to conventional diagonal decoupling, the method in strong cou-pling model parameters and there are some fluctuations, it can still ensure better robustness.

关 键 词：汽轮机 热电负荷耦合 数学模型 模糊解耦控制 

分 类 号：TK261[动力工程及工程热物理—动力机械及工程]