IC697MDL640
：/，QQ：1982497648
摘要：随着高新技术的发展和生产自动化程度的提高，我国国民经济发展，正在和继续需要大批技术应用型实用人才。电气自动化技术是现代制造技术中不可缺少的重要技术门类，也是一个科技实力乃至综合竞争力的综合反映，在工业发展中具有前导地位。本文介绍了电气自动化控制系统的监控方式和应用，以及阐述了综合自动化技术的发展趋势。
关键词：电气自动化；监控方式和应用
近几年来，电力系统中的各级变电站已经开始广泛应用微机电气综合自动化技术，企业获得了丰富的经验，广大用户业接受了这项新技术。微机综合自动化系统普遍采用的是分散分布技术，通过现场进行总线连接，通过通信管理机连接到后台的机器。这种模式不同于集中式，它更具有优势，比如结构简单、灵活、安装简单、易维护和高可靠性等等。
在发电厂的电气系统中，微机综合自动化技术并未广泛应用，电气系统的安装和保护等处于独立运行的状态，没有连接到一起形成完整的网络，管理水平比较落后，所以电气综合自动化控制系统日益受到人们的关注。
1 电气自动化控制系统
1．1 集中监控方式
这种监控方式优点是运行维护方便，控制站的防护要求不高，系统设计容易。但由于集中式的主要特点是将系统的各个功能集中到一个处理器进行处理，处理器的任务相当繁重，处理速度受到影响。由于电气设备全部进入监控，伴随着监控对象的大量增加随之而来的是主机冗余的下降、电缆数量增加，投资加大，长距离电缆引入的干扰也可能影响系统的可靠性。同时，隔离刀闸的操作闭锁和断路器的联锁采用硬接线，由于隔离刀闸的辅助接点经常不到位，造成设备无法操作。这种接线的二次接线复杂，查线不方便，大大增加了维护量，还存在由于查线或传动过程中由于接线复杂而造成误操作的可能性。
1．2 远程监控方式
早研发的自动化系统主要是远程控制装置，主要采用模拟电路，由继电器、电子管等分立元件组成。这一阶段的自动控制系统不涉及软件。主要由硬件来完成数据收集和判断，无法完成自动控制和远程调解。它们对提高变电站的自动化水平，保证系统安全运行，发挥了一定的作用，但是由于这些装置，相互之间独立运行，没有故障诊断能力，在运行中若自身出现故障，不能提供告警信息，有的甚至会影响电网安全。远程监控方式具有节约大量电缆、节省安装费用、，节约材料、可靠性高、组态灵活等优点。由于各种现场总线(如Lonworks 总线，CAN 总线等)的通讯速度不是很高，而电厂电气部分通讯量相对又比较大，所有这种方式适合于小系统监控，而不适应于全厂的电气自动化系统的构建。
1．3 现场总线监控方式
现场总线监控方式使系统设计更加有针对性，对于不同的间隔可以有不同的功能，这样可以根据间隔的情况进行设计。采用这种监控方式除了具有远程监控方式的全部优点外，还可以减少大量的隔离设备、端子柜、I/0卡件、模拟量变送器等，而且智能设备就地安装，与监控系统通过通信线连接，可以节省大量控制电缆，节约很多投资和安装维护工作量，从而降低成本。另外，各装置的功能相对独立，装置之间仅通过网络连接，网络组态灵活，使整个系统的可靠性大大提高，任一装置故障仅影响相应的元件，不会导致系统瘫痪。因此现场总线监控方式是今后发电厂计算机监控系统的发展方向。
SQUARE D 9002 AW-2 FOOT SWITCH
NORDSON HP05I-NN15-2506?-852 PRECISION FLOW UNIT, NNB
BALDOR VM3559 GENERAL PURPOSE AC MOTOR FRAME 56C 3 HP
EDWARDS HIGH VACUUM 5130 3" BUTTERFLY VALVE, NIB
TORRINGTON / FAFNIR 2MM9108WI DUM SUPER PRECISION BEARI...
TORRINGTON / FAFNIR 2MM9105WI DUL SUPER PRECISION BEARI...
TORRINGTON / FAFNIR 2MM9316WI CR DUL SUPER PRECISION BE...
TORRINGTON / FAFNIR 2MM9111WI DUL SUPER PRECISION BEARI...
TORRINGTON / FAFNIR 2MM209WI DUL SUPER PRECISION BEARIN...
INTRA CORP VARIABLE HAND HELD AIR TO ELECTRONIC GAUGE, ...
MIDDEX ELECTRONIC WKLR 22-90 TOOL CONTROL SYSTEM *NEW I...
NELES JAMESBURY 125 PSI, 1" NPT ACTUATOR SP13SR60-B
ROBO CYLINDER ACTUATOR DRIVE RCS-C-SM-A-100-?CC-2
ABB INDOOR CAPACITOR C484D4-3FI NNB
PFA SELF LOCKING AIR & LT. HYDRAULIC CYLINDER PVS-4.0/...
LENZE 277/480V, 60Hz, 3PH, DC MOTOR W/RESOLVER DF 90 L4...
ALLEN BRADLEY 836T-T252JX40 SERIES A PRESSURE CONTROL S...
MKS HPS PRODUCTS ISOLATION VALVE 152-0040K *NEW NO BOX*
CM COLUMBUS MCKINNON CYCLONE HAND HOIST EQUIPPED WITH L...
ALLEN BRADLEY POWER SUPPLY SERIES B 1775-PL NIB
SCHROEDER 3000PSI, N10 ELEMENT, 40 BYPASS, PRESSURE FIL...
BUSSMANN JCX-50E, 2750V (MAX) 50 AMP, LOT OF 1
SKF PRECISION BALL BEARING 71907 ACD/P4ADGA TWO 1/2 SE...
G-R PUMP SHAFT 10529-16040 NEW
NUMATICS 1/2"NPT, SOLENOID VALVE & MANIFOLD 33JDR5410 /...
HIRSCHMANN, OCTOPUS 5TX EEC, IP67- ETHERNET SWITCH
FANUC A80L-0010-0071-?02 0.1KVA CAPACITY 200 VOLT TRANS...
EATON, ED3225, CIRCUIT BREAKER, 225AMPS, 3 POLES
SKF 95MM BORE, 170MM OD, 55.6MM WIDTH, ANGULAR CONTACT ...
SIEMENS 6ES7307-1EA01-0?AA0 POWER SUPPLY PS307 24 V/5 A ...
SIEMENS 50 HZ 220/380 V ELECTRIC MOTOR LA5083-2AA20
MAPAL 9-27035-U-02921 TOOL HOLDER, 2.1627" DIA, 1.9815"...
DYNISCO TRANSMITTER IDA-350-5C-D21
GATES POLY CHAIN GT2 SPROCKET 14MX-50S-125 4535 NNB
CUNO INCORPORATED AUTOKLEAN FILTER 30 *NEW*
ASCO RED HAT 1" PIPE SOLENOID VALVE 8221G7 NNB
ENDRESS+HAUSER LIQUIPANT FTL260-3122 NIB
HONEYWELL PRECISION LOW PROFILE LOAD CELL 060-0572-05-0..?.
CONAIR ANALOG PC BOARD ASSEMBLY 107-211-01
DRESSER 25:1 RATIO GEAR REDUCER 1SN 91803 TF
VICKERS VANE PUMP V10 1P4P1020
NUMATICS L50L-08S1 APPROX 1" LUBRICATOR, NEW
WATLOW 120V 1KW 1PH TEMPERATURE CONTROLLER BCC6L1W-24 /...
BOSTON GEAR RPM 1750 167 HP TORQUE 250 SPEED REDUCER TW...
BAUER 460V, 1.78A, 60HZ 1710RPM GEAR MOTOR SG3-12/DK84-...
MCGILL SB-22309-W33-SS SPHERE-ROL BEARING 45 MM BORE, 1...
NUMATICS F624C-16ADU 300 PSIG AIR FILTER, NEW
VICKERS 02-119751 PBDG4S4L 012N B 60 C96S SOLENOID VALV...
AMERICAN AUTOGARD C072637 MODEL# 406-2RR TORQUE LIMITER...
JOHN CONTROLS, P28AA-17C, OIL FAILURE CUTOUT, 120/250 V...
GEMS 24576 FABRI-LEVEL KIT, NIB
MAC 6511B-612-PM-11?2DA SOLENOID VALVE, NNB
NUMATICS SOLENOID VALVE WITH SPRING RETURN 34SAD415013A...
PARKER 110/120V .49-.58A 3000 PSI DIRECTIONAL CONTROL V...
PARKER 63MM BORE 275MM STROKE CYLINDER, 63 CCPHMITB19MC...
ECLIPSE 2.0 PSIG 140°F 1-1/2" NPT ADJUSTABLE BIAS PROPO...
TEXAS INSTRUMENTS PWB 2490870-0002, CIRCUIT BOARD, NIB
NUMATICS 3JSR40 PNEUMATIC SOLENOID VALVE, NEW IN BAG SE...
UNIPAK 480V 25 KVAR 3 PHASE POWER CAPACITOR, 2543PMU
MILLER 2.5" BORE 16" STROKE CYLINDER, HV2-81B4B-02.50?-1...
BALDOR 90V 1/3HP 1750RPM 56C FRAME INDUSTRIAL MOTOR, CD...
VOLK CORPORATION RECIPROCATING INK IMPRINTER, VRP-2022S...
SQUARE D 600V 225A 2 POLE MOLDED CASE CIRCUIT BREAKER, ...
SQUARE D 600V 300A 3 POLE MOLDED CASE CIRCUIT BREAKER, ...
ALLEN BRADLEY 24VDC MICROLOGIX 1000 PROGRAMMABLE CONTRO...
IDEAL 85-017, COAX CABLE F-CONNECTORS, RG-6, LOT OF 10,...
TPC WIRE & CABLE 94418, SUPER TREX MINI QUICK CONNECT, ...
PARKER 530511000 1/4" PORTS 200 PSIG PILOT SPRING VALVE...
BROWNING 3" BORE FLANGE BEARING UNIT, VFCS-348, NIB
HONEYWELL 24VDC ULTRASONIC DISTANCE SENSOR, 941-C2V-2E-...
FALK 1.3750" BORE GEAR COUPLING 1020G20 *NEW*
MOTOROLA SYMBOL DS3408- BARCODE SANNER SF20005
RITEN 74092, STEEL & CARBIDE FULL DEAD CENTER, 6-1/2" O...
SIEMENS 3RA1326-8XB30-1?BB4 REVERSING CONTACTOR, NIB
ALLEN BRADLEY SLC 500 COMBINATION I/O MODULE 1746-IO12 ...
SMC 24VDC DIRECT OPERATED POPPET SOLENOID VALVES, VK332...
UNICO 314-847 CENTRAL PROCESSING UNIT
ALLEN-BRADLEY 2750-C1 ANTENNA CABLE 1P MALE STRAIGHT TO...
WATLOW 440V, 9KW, 3PH SCREW PLUG IMMERSION HEATER 6-38-...
NUMATICS 150 PSIG, 24V PNEUMATIC MANIFOLD VALVE 01327P-...
BRADY 3460-5 SELF-STICKING LABEL, LOT OF 213, NIB
TURCK RSM-2RKM 20, MINI-FAST TEES, 2P MALE, 2P FEMALE, ...
VICKERS 120V, 0.69A HYDRAULIC DIRECTIONAL VALVE PB DG4S...
SMC C95NF100-400-D, PNEUMATIC CYLINDER, 100 MM BORE, 40...
TRAGAKISS 300A 15"OAL WELDING GUN XL3015 *NEW*
ELAU SM 070-60-010-P1-4?4-M1-B0 SERVO MOTOR
MERCOID 1/4" NPT, 440V, 60 PSIG BOURDON TUBE PRESSURE S...
SETHCO DIVISION/LEESON 208-230V, 60/50Hz, 3450/2850RPM,..?.
BOSTON GEAR .530HP, 440LB/IN, RATIO 30, SPEED REDUCER F...
KEYENCE CCD CV-020
SWAGELOK, B-63TF8, BRASS ACTUATOR,NNB
SQUARE D, 8903 LA-40, AC LIGHTING CONTACTOR, 120 V, 60 ...
GOULD SHAWMUT AMP TRAP A50P70 TYPE 4, 70A, 500V, NIB - ...
ACOPIAN REGULATED POWER SUPPLY A14MT300
OMRON 100VAC TRANSMITTER K3FK-PRU-21-B *LOT OF 2*
UNITED ELECTRIC 9311 6BS F120 TEMPERATURE SENSOR, 0-250...
LAKE MONITORS M45-7WC-05-EPR FLOW RATE ALARMS / FLOW SW...
ALLEN BRADLEY Flex I/O ANALOG INPUT MODULE 1794-IE8 SER...
CARL SCHENCK CONTROL BOARD, A680128.02 B6 BVKV003 *NEW*
VEEDER ROOT115V, 60 HZ, 2W TOTALIZER 799526-101 *NEW*
CASHCO R9151 GENERAL SERVICE PRESSURE REDUCING REGULATO...
FESTO IC-8M3/2-2, 0-24PH-SA, INTERFACECARD, 87 PSI, 24 ...
MILLER 2" BORE 16" STROKE HYDRAULIC CYLINDER, H-72B2B-0...
THOMSON TWN20 BALL BUSHING SUPER PILLOW BLOCK, NEW
AUTOMAX S125DA SuperNova SERIES RACK & PINON ACTUATOR W...
HOLLAND 1FT 1/2IN. OAL SANITARY TRANSFER HOSE 16-FRG-10...
MANNSMANN DEMAG 230/460V 60HZ .43HP FRAME B6 MOTOR 7190...
EXAIR 1/8IN. NPT NOZZEL 1001 *NEW LOT OF 51*
ROSS 2-10 BAR, 115V, 60HZ, 5-PIN MALE CONNECTION, SOLEN...
EATON 2000LBS CAPACITY LOAD CELL 3173-2K
BARDEN PRECISION BEARINGS 3"OD ROLLER BALL BEARINGS 208...
SOLBERG F235P-400, INLET FILTER, 4MNPT, OUT 520 MAX.CFM...
RELIANCE ELECTRIC 4.31V 200A COIL 600595-13BB *NEW*
ROTO ELECTRONICS CONTROL BOARD 611-08111 / 7208.029
ALLEN BRADLEY 25HP 1336 DRIVE 460V POWER SUPPLY BOARD 1...
CUTLER-HAMMER 3-POLE SIZE 3 CONTACT KIT, 6-25-2 *NEW*
ORIENTAL MOTOR LINEAR MOTION CONTROLLER EZMC24 I-A
IWAKI METERING PUMP 24W 200V 0.6A EH-C20SH-200R9
ALLEN BRADLEY POINT I/O DeviceNet INTERFACE MODULE 1734...
SPECTER INSTRUMENTS LINX 3000 CONTROLLER 3100-1
