空气压缩系统节能控制研究
|
摘要
针对空气压缩系统产气压力不稳定、能量利用率低等问题,提出了一种新型的稳压控制方法。利用阶梯式异步加卸载策略控制非变频空压机的运行,以减小输入气量的激增对出气压力的影响,根据用户耗气流量和系统产气压力并联控制非变频空压机的加卸载。同时提出通过变速积分PID控制方法来控制变频空压机的运行,在系统运行过程中动态调节积分变量,减少了系统的超调,进一步稳定产气压力。建立了空气压缩系统数学模型,并在耗气量变化的情况下进行系统仿真实验,实验结果表明,所提出的控制策略具有良好的稳压效果,并通过稳压达到节能的目的。
A control method was presented in this paper for compressed air system,which was made up by multiple compressors.A new method of stabilizing air pressure was put forward in order to solve the problems,such as low energy efficiency and serious air leakage.Asynchronous loading and unloading method was exploited to control the operation of non-variable frequency compressors,which was aimed at reducing the effects of outlet pressure caused by the dramatically increasing air input.The non-variable frequency air compressors loaded and unloaded based on the users'gas flow and the air pressure from the system working together.Meanwhile,a variable PID method was used to control the variable frequency air compressors.Integration variable was regulated dynamically,the overshooting of the system was reduced and further the gas pressure was stabilized.The detailed analysis of the compressed air system with simulation in the situation of the variable air consumption explained that the control strategy proposed can achieve stable pressure and energy-saving.
A control method was presented in this paper for compressed air system,which was made up by multiple compressors.A new method of stabilizing air pressure was put forward in order to solve the problems,such as low energy efficiency and serious air leakage.Asynchronous loading and unloading method was exploited to control the operation of non-variable frequency compressors,which was aimed at reducing the effects of outlet pressure caused by the dramatically increasing air input.The non-variable frequency air compressors loaded and unloaded based on the users'gas flow and the air pressure from the system working together.Meanwhile,a variable PID method was used to control the variable frequency air compressors.Integration variable was regulated dynamically,the overshooting of the system was reduced and further the gas pressure was stabilized.The detailed analysis of the compressed air system with simulation in the situation of the variable air consumption explained that the control strategy proposed can achieve stable pressure and energy-saving.
引文
[1]张业明,蔡茂林.面向压缩机群控制的新型节能智能控制器的研究[J].液压气动与密封,2008,28(5):14-18.
[2]MAK T W K,VAN HENTENRYCK P,ZLOTNIK A,et al.Efficient dynamic compressor optimization in natural gas transmission systems[C]//American Control Conference(ACC),2016.IEEE,2016:7484-7491.
[3]梁启宇.多机组智能集中节能系统在螺杆空压机的节能应用[J].通用机械,2010(2):67-70.
[4]邢长新.压缩空气系统建模与优化控制[D].杭州:杭州电子科技大学,2015.
[5]KRICHEL S V,SAWODNY O.Dynamic modeling of compressors illustrated by an oil-flooded twin helical screw compressor[J].Mechatronics,2011,21(1):77-84.
[6]STEIN A,NIAZI S,SANKAR L N.Computational analysis of centrifugal compressor surge control using air injection[J].Journal of Aircraft,2015,38(3):513-520.
[7]王盛慧,金星,田巍.空压机时变模型的建立与预测控制方法的研究[J].长春工业大学学报,2010,31(1):10-14.
[8]赵前程,戴巨川,覃业军,等.空压机压力控制系统建模与动态特性研究[J].压缩机技术,2013(1):23-28.
[9]何凤有,鲍卫宁,汤玚,等.基于模糊PID控制器的空压机恒压供气系统的设计[J].工矿自动化,2010,36(1):91-93.
[10]DENG T.Minimization of power usage in a compressor station with multiple compressors[J].Journal of Energy Engineering,2015,142(4):48-57.
[11]王红.螺杆压缩机变工况工作过程模拟和性能分析[D].阜新:辽宁工程技术大学,2006.
[12]LU H W,HAN X W,WANG A N,et al.Numerical simulation for aerodynamic performance of transonic compressor rotor with circumferential suction slot and vacuum cavity[J].Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy&Power,2017,32(5):57-63.
[13]狄春红.半封闭活塞式制冷压缩机容积效率的研究[J].职大学报,2011(6):82-84.
[14]LI W.Simplified steady-state modeling for variable speed compressor[J].Applied Thermal Engineering,2013,50(1):318-326.
[2]MAK T W K,VAN HENTENRYCK P,ZLOTNIK A,et al.Efficient dynamic compressor optimization in natural gas transmission systems[C]//American Control Conference(ACC),2016.IEEE,2016:7484-7491.
[3]梁启宇.多机组智能集中节能系统在螺杆空压机的节能应用[J].通用机械,2010(2):67-70.
[4]邢长新.压缩空气系统建模与优化控制[D].杭州:杭州电子科技大学,2015.
[5]KRICHEL S V,SAWODNY O.Dynamic modeling of compressors illustrated by an oil-flooded twin helical screw compressor[J].Mechatronics,2011,21(1):77-84.
[6]STEIN A,NIAZI S,SANKAR L N.Computational analysis of centrifugal compressor surge control using air injection[J].Journal of Aircraft,2015,38(3):513-520.
[7]王盛慧,金星,田巍.空压机时变模型的建立与预测控制方法的研究[J].长春工业大学学报,2010,31(1):10-14.
[8]赵前程,戴巨川,覃业军,等.空压机压力控制系统建模与动态特性研究[J].压缩机技术,2013(1):23-28.
[9]何凤有,鲍卫宁,汤玚,等.基于模糊PID控制器的空压机恒压供气系统的设计[J].工矿自动化,2010,36(1):91-93.
[10]DENG T.Minimization of power usage in a compressor station with multiple compressors[J].Journal of Energy Engineering,2015,142(4):48-57.
[11]王红.螺杆压缩机变工况工作过程模拟和性能分析[D].阜新:辽宁工程技术大学,2006.
[12]LU H W,HAN X W,WANG A N,et al.Numerical simulation for aerodynamic performance of transonic compressor rotor with circumferential suction slot and vacuum cavity[J].Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy&Power,2017,32(5):57-63.
[13]狄春红.半封闭活塞式制冷压缩机容积效率的研究[J].职大学报,2011(6):82-84.
[14]LI W.Simplified steady-state modeling for variable speed compressor[J].Applied Thermal Engineering,2013,50(1):318-326.