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1790D-N0V2現貨 in stock! 歡迎來電咨詢~！！

單元機組控制系統一體化的崛起
　　隨著一些電廠將電氣發變組和廠用電系統的控制(ECS)功能納入DCS的SCS控制功能范圍，ETS控制功能改由DCS模件構成，DEH與DCS的軟硬件合二為一，以及一些機組的煙氣濕法脫硫控制直接進入單元機組DCS控制的成功運行，標志著控制系統一體化，在DCS技術的發展推動下而走向成熟。
　　由于一體化減少了信號間的連接接口以及因接口及線路異常帶來的傳遞過程故障，減少了備品備件的品種和數量，降低了維護的工作量及費用，所以近幾年一體化控制系統在不同容量的新建機組中逐漸得到應用，如浙江華能玉環電廠4×1000MW機組、臺州電廠2×300MW機組和安徽鳳臺電廠4×600MW機組均全廠采用西屋Ovation系統，國華浙能寧海電廠4×600MW機組全廠采用西門子公司的T-XP系統，大唐烏沙山電廠4×600MW機組全廠采用I/A系統，國華臺山電廠2×1000MW機組采用北京和利時公司系統，浙江樂清電廠4×600MW機組全廠采用ABB公司的SYMPHONY系統等。 控制系統一體化的實現，是電力行業DCS應用功能快速發展的體現。排除人為因素外，控制系統一體化將為越來越多的電廠所采用。
　　3)DCS結構變化，應用技術得到快速發展
　　隨著電子技術的發展，近年來DCS系統在結構上發生變化。過去強調的是控制功能盡可能分散，由此帶來的是使用過多的控制器和接口間連接。但過多的控制器和接口間連接，不一定能提高系統運行可靠性，相反倒有可能導致故障停機的概率增加。何況單元機組各個控制系統間的信號聯系千絲萬縷，互相牽連，一對控制器故障就可能導致機組停機，即使沒有直接導致停機，也會影響其它控制器因失去正確的信號而不能正常工作。
　　因此隨之控制器功能與容量的成倍增加、更多安全措施(包括采用安全性控制器)、冗余技術的采用(有的DCS的核心部件CPU，采用2×2冗余方式)以及速度與可靠性的提高，目前DCS正在轉向適度集中，將相互聯系密切的多個控制系統和非常復雜的控制功能集中在一對控制器中，以及上述所說的單元機組采用一體化控制系統，正成為DCS應用技術發展的新方向，這不但減少了故障環節，還因內部信息交換方便和信息傳遞途徑的減少而提高了可靠性。
　　此外，隨著近幾年DCS應用技術的發展，如采用通用化的硬件平臺，獨立的應用體系，標準化的通訊協議，PLC控制器額融入，FCS功能的實現，一鍵啟動技術的成功應用等，都為DCS增添了新的活力，功能進一步提高，應用范圍更加寬廣。
　　4)全廠輔控系統走向集中監控
　　一個火電廠有10多個輔助車間，國內過去通常都是由PLC和上位機構成各自的網絡，在各車間控制室內單獨控制，因此得配備大量的運行人員。為了提高外圍設備控制水平和勞動生產率，達到減員增效的目的，隨著DCS技術和網絡通訊功能的提高，目前各個輔助車間的控制已趨向適度集中，
　　整合成一個輔控網(簡稱BOP 即Balance Of Plant的縮寫)方向發展，即將相互獨立的各個外圍輔助系統，利用計算機及網絡技術進行集成，在全廠IT系統上進行運行狀況監控，實現外圍控制少人值班或無人值班。
　　近幾年新建工程迅速向這個方向發展。如國華浙能寧海電廠一期工程(4×600MW)燃煤機組BOP覆蓋了水、煤、灰等共13個輔助車間子系統的監控，下設水、煤、灰三個監控點，集中監控點設在四機一控室里，打破了傳統的全廠輔助車間運行管理模式，不但比常規減員30%，還提升了全廠運行管理水平。整個輔控網的硬件和軟件的統一，減少了庫存備品備件及日常管理維護費用。由于取消了多個就地控制室，使得基建費用和今后的維護費用都減少。一些老廠的輔助車間也在進行BOP改造，其中浙江省第一家完成改造的是嘉興發電廠2×300MW機組，取得較好效果。

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ABB ROBOTICS DSQC 317 3HAB2220-1 MEMORY MODULE EXPANSION BOARD 6MB 77484

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03400 SIEMENS TYP 03400-A NR.340884 GE.548 184.0001.00 (SINUMERIK 3T)-AT DUBAI

NACHI RAX23C USPP RAX23C

ALLEN BRADLEY 1756-L60M03SE NSPP 1756L60M03SE

ALLEN BRADLEY 1336-C005-EAD USPP 1336C005EAD

GENERAL ELECTRIC 6VAF554 USPP 6VAF554

STEARNS 1081011A2FBF USPP 1081011A2FBF

SIEMENS 6SE9-216-8CB40 NSFP 6SE92168CB40

BARBER COLMAN 80BE-00044-212-V-00 USPP 80BE00044212V00

Siemens 6ES5 945-7UA21

Siemens SIMATIC S5 6ES5 945-7UA13

SIEMENS 6ES5-712-8BC50 NSFP 6ES57128BC50

Siemens 6ES5 490-8MA12 NSFP 6ES54908MA12

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Modicon AS-M484-104

Schneider Modicon AS-BDAP-209

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RIS TM-2482-P13-000-P2-00-RE-00 TEMPERATURE MONITOR 117

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SIEMENS SUN SG-XL8500-SDLT6FC SDLT600 FC Tape Drive SL8500

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Allen Bradley Versa View 1500H 6189-RDT15CA 2711P-RN6 6182-15TEH6B

ABB IRB 1400 SER 14-20035 ROBOT S4C PLUS CNTRLR TEACH PENDANT W/ MATCHED SET

Advanced Energy RFG3001 - PN 3155089-005B

(NOS) Allen Bradley 2711-K5A10 PanelView 550 2711K5A10 Series H FRN 4.48

MEASUREX 09437700 USPP 09437700

ALLEN BRADLEY 1336E-BX040-AN-EN-L9E USPP 1336EBX040ANENL9

GE FANUC IC752WTD802 USPP IC752WTD802

FANUC A16B-1211-0150 NSPP A16B12110150

SIEMENS 6DL3-100-8AC USPP 6DL31008AC

RELIANCE ELECTRIC 45C-37B NSFP 45C37B

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SIEMENS 6ES5-441-4UA13 NSFP 6ES54414UA13

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Square D 8030 CC-30

OMRON C500-IP004-E PERIPHERAL INTERFACE MODULE

WS-C2960S-24TS-L CISCO 2960S-24TS SWICTH W/1 YR -WSC2960S24TSL Fast Sh

SIEMENS 6ES7-322-1HH00-0AA0 6ES73221HH000AA0

SIEMENS SINUMERIK 6FC5203-0AF00-0AA0 Membrane Keypad

Saftronics CIMR-G3U21P5

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Schneider Modicon AS-B552-000 NSPP ASB552000

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Schneider Modicon AS-BDEP-218 Discrete Input Mod.

Schneider Modicon AS-B827-032 24 VDC Input ASB827032

MODICON AEG PANELMATE PLUS OPERATOR INTERFACE MM-PMC2-200 PARTS OR REPAIR

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SFP-GE-Z CISCO GENUINE 1000BASE-ZX GIGABIT ETHERNET SFP DOM

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Advantech RS-422/485 Isolated Repeater ADAM-4510S

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ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 88228

ADEPT TECH 10332-11400 NSPP 1033211400

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TELEMECANIQUE TSX-P474-25 USPP TSXP47425

ENDRESS & HAUSER 83F08-CFUDAANAB3AE NSFP 83F08CFUDAANAB3A

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QUALITROL IDM-LSU-MKII NSPP IDMLSUMKII

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INDRAMAT PLCB02-02-FW USPP PLCB0202FW

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ATLAS COPCO 4240-0367-81 USPP 4240036781

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WESTINGHOUSE 2D78548G04 USPP 2D78548G04

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SIEMENS 6ES5 701-1LA12 6ES57011LA12

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FOXBORO COMP. P0400VP CMP10 PLC COMMUNICATIONS PROCESSOR 10 MODULE REV-0S 51921

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