As for the application of electronic fuel injection （EFI） system to small gasoline generator set, mechanical speed controller cannot be coupled with EFI system and has the shortcomings of lagged regulation and poor ...As for the application of electronic fuel injection （EFI） system to small gasoline generator set, mechanical speed controller cannot be coupled with EFI system and has the shortcomings of lagged regulation and poor accuracy, a feed-forward control strategy based on load combined with proportional-integral-differential （PID） control strategy was proposed, and a digital speed controller applied to the electrical control system was designed. The detailed control strategy of the controller was intro- duced. The hardware design for the controller and the key circuits of motor driving, current sampling and angular signal captu- ring were given, and software architecture was discussed. Combined with a gasoline generator set mounted with EFI system, the controller parameters were tuned and optimized empirically by hardware in loop and bench test methods. Test results show that the speed deviation of generator set is low and the control system is stable in steady state; In transient state the control system responses quickly, has high stability under mutation loads especially when suddenly apply and remove 100% load, the speed deviation is within 8% of reference speed and the transient time is less than 5 s, satisfying the ISO standard.展开更多
主蒸汽温度是火力发电厂影响设备效率和安全性的重要因素,现有的比例–积分–微分(Proportion Integral Differential,PID)控制对于大容量动力源,如锅炉负荷变化、燃料种类切换等,存在较大的滞后和延迟反应,不能实现精确稳定的控制。文...主蒸汽温度是火力发电厂影响设备效率和安全性的重要因素,现有的比例–积分–微分(Proportion Integral Differential,PID)控制对于大容量动力源,如锅炉负荷变化、燃料种类切换等,存在较大的滞后和延迟反应,不能实现精确稳定的控制。文章针对主蒸汽温度控制系统的特点,分析了其中的控制问题;针对现有PID控制无法适应的控制方式,提出了一种模糊自适应PID控制方法。该方法采用模糊计算原理,通过主蒸汽温度控制的实际反馈信号及误差变化率,动态调节PID控制器的比例、积分和微分系数,以提高其自适应能力。Matlab/Simulink仿真建立主蒸汽温度控制系统仿真模型,分别比较传统PID控制和模糊自适应PID控制的阶跃响应和抗干扰性能。通过仿真,发现与传统PID控制相比,模糊自动调整PID控制系统具有反应速度快、超调量低、更快地趋于稳定及鲁棒性强等特点,能有效地提升主蒸汽温度控制的品质,具有理论与实践意义,可为汽机机组的安全、稳定、高效运行提供保证。展开更多
文摘As for the application of electronic fuel injection （EFI） system to small gasoline generator set, mechanical speed controller cannot be coupled with EFI system and has the shortcomings of lagged regulation and poor accuracy, a feed-forward control strategy based on load combined with proportional-integral-differential （PID） control strategy was proposed, and a digital speed controller applied to the electrical control system was designed. The detailed control strategy of the controller was intro- duced. The hardware design for the controller and the key circuits of motor driving, current sampling and angular signal captu- ring were given, and software architecture was discussed. Combined with a gasoline generator set mounted with EFI system, the controller parameters were tuned and optimized empirically by hardware in loop and bench test methods. Test results show that the speed deviation of generator set is low and the control system is stable in steady state; In transient state the control system responses quickly, has high stability under mutation loads especially when suddenly apply and remove 100% load, the speed deviation is within 8% of reference speed and the transient time is less than 5 s, satisfying the ISO standard.
文摘主蒸汽温度是火力发电厂影响设备效率和安全性的重要因素,现有的比例–积分–微分(Proportion Integral Differential,PID)控制对于大容量动力源,如锅炉负荷变化、燃料种类切换等,存在较大的滞后和延迟反应,不能实现精确稳定的控制。文章针对主蒸汽温度控制系统的特点,分析了其中的控制问题;针对现有PID控制无法适应的控制方式,提出了一种模糊自适应PID控制方法。该方法采用模糊计算原理,通过主蒸汽温度控制的实际反馈信号及误差变化率,动态调节PID控制器的比例、积分和微分系数,以提高其自适应能力。Matlab/Simulink仿真建立主蒸汽温度控制系统仿真模型,分别比较传统PID控制和模糊自适应PID控制的阶跃响应和抗干扰性能。通过仿真,发现与传统PID控制相比,模糊自动调整PID控制系统具有反应速度快、超调量低、更快地趋于稳定及鲁棒性强等特点,能有效地提升主蒸汽温度控制的品质,具有理论与实践意义,可为汽机机组的安全、稳定、高效运行提供保证。
