基于MPC的三轴燃气轮机转速负荷控制  

Design of Three-shaft Gas Turbine Speed Load Control based on MPC

作　　者：沈立锐 丁超 夏焱 陈鹏 Shen Lirui;Ding Chao;Xia Yan;Chen Peng(Wuxi Division of No.703 Research Institute of CSIC, Jiangsu Wuxi 214100,China)

机构地区：[1]中国船舶重工集团公司第七○三研究所无锡分部,江苏无锡214100

出　　处：《燃气轮机技术》2020年第2期1-9,共9页Gas Turbine Technology

摘　　要：三轴燃气轮机转速负荷控制一般采用串级PID控制方案,该方案具有较好的抗干扰性,但考虑多限制时结构显得冗余、保守。为进一步提高燃气轮机控制系统的动态性能,简化系统结构,提出了一种基于模型预测控制的串级PID-MPC方案,采用MBD的设计方法在MATLAB/Simulink平台中建立了燃气轮机模型和控制算法,利用代码生成技术产生C/C++代码在全数字仿真平台上进行了集成和验证。仿真结果表明:串级PID-MPC在负荷连续阶跃和甩负荷情况下调节时间均小于3 s,超调量不超过2.9%,与串级PID相比具有更好的动态性能,且在限制条件下控制算法单步运行最大耗时4.69 ms,平均耗时1.84 ms,具有较好的实时性。The cascade PID control scheme is generally adopted in the speed load control of three-shaft gas turbine,which has good anti-interference ability,but the structure appears redundant and conservative when multi-constraints are introduced.In order to further improve the dynamic performance and simplify the system structure of control system,a PID-MPC scheme based on model predictive control is proposed.The gas turbine model and controller are built on MATLAB/Simulink platform by MBD method.The C/C++code generated by embedded coder is integrated and verified on the full digital platform.The simulation results show that the adjusting time of PID-MPC is less than 3s and the overshoot is less than 2.9%under the condition of load step and load shedding.Compared with cascade PI,PID-MPC has better dynamic performance and anti-interference performance.The maximum time consumed by the controller is 4.69ms,as the average time is 1.86ms under multi-restriction conditions,which has good real-time performance.

关 键 词：燃气轮机 转速负荷控制 串级控制 集成验证 

分 类 号：V233.7[航空宇航科学与技术—航空宇航推进理论与工程]