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MDS-B-V2-4535驱动器
MDS-B-V2-4535驱动器
MDS-B-V2-4535驱动器
前言
上世纪九十年代初,DCS刚开始在火电厂尝试应用时,由于DCS技术尚处于发展的初期阶段,且没有应用经验,因此,在配置DCS的同时,还设计了大量后备监控设备。后来的实践证明,DCS不仅提高了机组自动化水平,而且相比传统控制设备来说也是可靠、的设备。但是,实践同样证明,DCS仍然不可避免会出现故障,而且由于DCS是一个大系统,将机组的众多控制系统通过网络熔合成为一个不可分割的、相互独立性差的大系统,局部故障常常会演变成全局性故障,因此,配置必要的独立于DCS的后备监控设备仍然是国内外的共识,但是,目前的DCS后备监控设备配置是否合理,究竟应当怎样配置,仍然需要我们再思考和研究。
一、DCS后备监控设备配置的现状
上世纪九十年代中后期,DCS被火电厂广泛应用,其控制功能范围也日益扩大。电力规划设计总院于1993年4月19日和1996年11月29日二次颁发的《单元机组分散控制系统设计若干技术问题规定》(以下简称《规定》),以及后来发布的《火力发电厂设计技术规程》(DL5000-2000)(以下简称《规程》)对DCS后备监控设备配置原则和要求均做出了较详细的规定。《规程》要求后备监控设备的设置应满足“当分散控制系统发生全局性或重大故障时(例如分散控制系统电源消失、通讯中断、全部操作员站失去功能、重要控制站失去控制和保护功能等)”应“确保机组紧急停机”。第一版《规定》还明确要求“当一个控制站故障时,能保证稳定负荷下短时运行和停机”。
根据当时的认识,具体规定如下:
1)应设置独立于DCS的后备操作手段
汽轮机跳闸
总燃料跳闸
发电机-变压器组跳闸
锅炉门(机械式可不装)
汽包事故放水门
汽轮机真空破坏门
真流润滑油泵
交流润滑油泵
发电机灭磁开关
柴油机启动
2)顺序控制系统和模拟量控制系统可不配置后备操作器
3)机炉不宜配置常规报警装置,必要时可按下列原则为每个单元机组设置不超过20个光字牌报警窗口。
目前,火电厂DCS后备监控设备基本上均按上述要求进行配置,后备仪表只配置汽包水位和炉膛火焰工业电视,而常规报警装置大多均已不再配置。
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【主营产品】
1:Invensys 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。
2:Invensys Triconex: 冗余容错控制系统、基于三重模件冗余(TMR)结构的现代化的容错控制器。
3:Westinghouse(西屋): OVATION系统、WDPF系统、WEStation系统备件。
4:Rockwell Allen-Bradley: Reliance瑞恩、SLC500/1747/1746、MicroLogix/1761/1763/1762/1766/1764、CompactLogix/1769/1768、Logix5000/1756/1789/1794/1760/1788、PLC-5/1771/1785等。
5:Schneider Modicon(施耐德莫迪康):Quantum 140系列处理器、控制卡、电源模块等。
6:ABB:工业机器人备件DSQC系列、Bailey INFI 90等。
7:Siemens(西门子):Siemens MOORE, Siemens Simatic C1,Siemens数控系统等。
8:Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
9:XYCOM:I/O 、VME板和处理器等。
10:GE FANUC(GE发那科):模块、卡件、驱动器等各类备件。
11:Yaskawa(安川):伺服控制器、伺服马达、伺服驱动器。
12:Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
13:Woodward(伍德沃德):SPC阀位控制器、PEAK150数字控制器。
14:工业机器人系统备件。
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