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调节器正/反作用的确定方法
调节系统投自动:往往在控制方案确定好且判断出调节器的正/反作用后,关键的是P、I、D参数如何整定,根据多年的现场工作经验,谈谈如何整定调节系统的P、I、D参数,请大家在工程中参考。
在整定调节系统的P、I、D参数前,要保证一个闭环调节系统必须是负反馈,即Ko*Kv*Kc>
调节对象Ko:
阀门、执行器开大,测量PV增加,则Ko>0;反之,则Ko<0;
调节阀门Kv:
阀门正作用(气开、电开),则Kv>0;阀门反作用(气关、电关),则Kv<0;
Ko、Kv的正负由工艺对象和生产安全决定,根据Ko、Kv的正负和Ko*Kv*Kc>0,我们可以确定Kc的正负;
调节器Kc:
若Kc>0,则调节器为反作用;若Kc<0,则调节器为正作用;软件组态中要设置正确,在装置调试和开车及P、I、D参数整定前,调节器的正/反作用务必检查,且正确无误。
1、在整定调节系统的P、I、D参数前,要保证测量准确、阀门动作灵活;
2、在整定调节系统的P、I、D参数时,打好招呼,要求用户工艺操作密切注意生产运行状况,确保安全生产;
3、在整定调节系统的P、I、D参数时,先投自动后串级,先投副环后主环,副环粗,主环细。在操作站CRT上,打开调节器的整定调整画面窗口,改变给定值SP或输出值OP,给出一个工艺允许的阶跃信号,观察测量值PV变化和趋势图,不断修定PID参数,往往反复几次,直至平稳控制。实际中,一般能达到工艺满意的一阶特性即可。
Measurex 05365400 Rev. A Termination Redundant PIDP Module Board w/ 05365500
Measurex 05365800 Mpu Controller Ii Pcb Circuit Board Rev C
MEASUREX 05365900 TRANSITION FLAT PANEL REV B HONEYWELL (3F6)
Measurex 053668-00 Rev A Switchover Autobackup Module PLC Revision A
MEASUREX 05366800 REV B PCB SWITCHOVER AUTO-BACKUP
Measurex 05366800 Switchover, Autobackup, Rev B with 05357600
MEASUREX 0536700/A RCVR/POWER SUPPLY/TEMP SENS TYPE II
Measurex 05367600 ADC QBUS Type 2 (ML-4) Assembly, Rev F
MEASUREX 05367600 REV. D UNMP
MEASUREX 05367600-DAS1128-12D15.200 PC BOARD
MEASUREX 05367600-DAS1128-AFC5-12D15F REV.F PC BOARD
MEASUREX 05367600-MP6812A-AFC5-1D15E REV.F PC BOARD
Measurex 05367601 Analog to Digital Converter
Measurex 053677-00 Rev C UOP Personality Uniview Operations Processor Module PLC
MEASUREX 05367900 EXTENDER, CLOCK CALENDAR W-12V
Measurex 05367900 Rev B Extender Clock Calendar W-12V Module PLC Board
Measurex 053679-00 Rev C Extender Calendar W-12V Module PLC 04367900 B Honeywell
Measurex 053686 Controller Graphic Builder ml-4 "WARRANTY"
Measurex 05369000 Display Keyboard Controller PLC Processor Honeywell
MEASUREX 053708 UNMP
Measurex 05371100 Rev A Host I/F VPU Type II Module PLC Board
Measurex 053714 PCB gp63 transition "WARRANTY"
Measurex 05371400 Rev D GP63 Transition Module PLC Board
Measurex 05371800 Rev F Buffered Serial Controller Type 2 Module Board
MEASUREX 05372600 FSK TERMINATION
Measurex 053730 Rev C, MX634 MB ECC Memory Assy Circuit Board
Measurex 053730-00 Rev C MX63 4 MB ECC Memory Module PLC 04373000 Rv A Honeywell
Measurex 05373700 Rev C Controller Matrix Printer Type II PLC Board 053737-00
Measurex 05374000 Rev D Controller Ethernet MB1 Module PLC Board 053740-00
Measurex 05374100 Rev A GP63 Transition Module PLC Board 053741-00 Revision A
Measurex 05374100 Transistion Board GP63
MEASUREX 05374701 COMTERM 8 POSITION BACKPLANE REV A CIRCUIT BOARD(3B6)
Measurex 05374701 08602600 Rack Backplane Comterm 8 Pos PLC Processor Honeywell
MEASUREX 05374701/A BACKPLANE COMTERM 8 POSITION
Measurex 05375400 Quad Differential Amp/Thermistor Assembly
MEASUREX 05375400 REV.D PC BOARD
MEASUREX 05375400/C QUAD DIF AMPLIFIER / THERMISTOR
Measurex 05375900 A Data Freeway Controller-8 MHz PLC Honeywell Type 2
MEASUREX 053772 UNMP
Measurex 053779-00 Rev B SCC Terminal Adapter Module PLC Revision B