描述
存在问题和解决方法
虽然DCS采用先进技术,功能强大,但实际应用中,包括设计、安装、操作、管理和维护等环节,还存在诸多问题。
资料显示,由于DCS(包括DEH)原因引起热控保护误动而造成的机组跳闸在全部热控保护误动中占很大比例,且随着DCS大量应用有逐渐增长之势。如我省100 MW以上机组2001年共发生热控保护误动41次,其中DCS原因为19次,占热控保护误动总数的46.3%;2002年在统计的24次热控保护误动造成机组跳闸中,DCS原因为13次,占热控保护误动总数的54.2%;2003年在统计的44次热控保护误动造成机组跳闸中,DCS原因为25次,占热控保护误动总数的56.8%。
当前电力供应紧张,分析并解决DCS在应用中出现的各种问题对于保障机组安全、经济运行尤为重要。以下结合实例试进行探讨,希望能提供有益的借鉴。
主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro(福克斯波罗):I/A Series系统,FBM(现场输入/输出模块)
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
结构的zui现代化的容错控制器。
⑨Siemens(西门子):Siemens MOORE,Siemens Simatic C1,Siemens数控系统等。
⑩Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
◆Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
Allen Bradley Cat#:1745-PCC,SLC PC I/F Converter
Allen Bradley 1745-E101 1745E101 SLC 100 Expansion NIB
One-day shipping available
ALLEN BRADLEY 1745-E105 USPP 1745E105
ALLEN BRADLEY 1745-PT1 USPP 1745PT1
Allen Bradley SLC 100 System,1745-E101,LP101,E105
2 NICE ALLEN BRADLEY SLC 100 PROCESSOR UNITS 1745-LP103
NICE ALLEN BRADLEY SLC 150 PROGRAMMABLE 1745-E105
NICE ALLEN BRADLEY SLC 150 PROGRAMMABLE 1745-LP101
NICE ALLEN BRADLEY SLC 150 PROGRAMMABLE 1745-LP151
ALLEN BRADLEY 1745-E151 USPP 1745E151
1745-LP157 Allen Bradley SLC 150 1745LP157 N806
One-day shipping available
New 1745-LP154/C Allen Bradley SLC 150 1745LP154 N820
One-day shipping available
New in Box 1745-LP103/D Allen Bradley 1745LP103 N842
One-day shipping available
New in Box 1745-E156 Allen Bradley SLC 150 1745E156
One-day shipping available
Allen Bradley SLC Processor 1745-LP101 and 1745-E101
1745-LP157 Allen Bradley SLC 150 1745LP157 N839
One-day shipping available
Allen Bradley#1745-LP101 I/O Module Fixed(U)ABS/9
1745-E105/B ALLEN BRADLEY SLC-100 EXPANSION UNIT
Allen Bradley 1745-E101/B|Expansion Unit*NIB*
Allen Bradley 1745-E151
Allen Bradley 1745-LP101
ALLEN BRADLEY A-B SLC100 1745-E106 EXPANSION 1745E106
Allen Bradley 1745-E105
1745M1 NEW ALLEN BRADLEY 1745 M1 FREE SHIPPING
One-day shipping available
Allen Bradley SCL 100,1745-LP101 Processor Unit
Allen Bradley AB Expansion Controller 1745-E103 SLC 100
New Allen Bradley Controller 1745-PCC#28995
ALLEN BRADLEY 1745-E101 EXPANSION UNIT SLC-100 NEW
ALLEN BRADLEY 1745-R1 NSFP 1745R1
ALLEN BRADLEY 1745-LP101 PROGRAMMABLE CONTROLLER-NIB
Expedited shipping available
ALLEN BRADLEY 1745-M1 NSFP 1745M1
ALLEN BRADLEY SLC 150 EXPANSION UNIT CATALOG#1745-E151
Allen Bradley SLC100 PLC 1745-E105
NS**ALLEN-BRADLEY 1745-E156 SLC 150 EXPANSION UNIT
One-day shipping available
1745-E107 Allen Bradley Analog Expansion 1745E107 N814
One-day shipping available
Allen Bradley Memory Module 1745-M1 ____L25.1
ALLEN-BRADLEY 1745-E106 SLC 100 Programmable Controller
Allen Bradley SLC 100 PLC Expansion Unit 1745-LP101 NR
ALLEN BRADLEY 1745-E151 SER B SLC100 EXPANSION UNIT NIB
Allen Bradley 1745-E105 1745E105 C SLC 100 Expansion Un
One-day shipping available
Allen Bradley 1745-LP101 D 1745LP101 SLC 100 Processor
One-day shipping available
1745-LP156/C Allen Bradley SLC 150 1745LP156 N827
One-day shipping available
1745-LP154/C Allen Bradley SLC 150 1745LP154 N981
One-day shipping available
1745-LP156/C Allen Bradley SLC 150 1745LP156 N829
One-day shipping available
New no Box 1745-LP153/C Allen Bradley 1745LP153 N807
One-day shipping available
Allen Bradley 1745-PT1 SLC Programmer 1745-C1*Test*
Allen Bradley 1745-PT1 SLC Programmer 1745-C1*Test*
1745-LP154/C Allen Bradley SLC 150 1745LP154 N836
One-day shipping available
New 1745-E152 Allen Bradley SLC 150 1745E152 N839-1
One-day shipping available
NEW ALLEN BRADLEY 1745-LP153 PROGRAMMABLE CONTROLLER
One-day shipping available
1745-LP153 Allen Bradley PLC SLC150 Processor
One-day shipping available