Saturday, December 18, 2010

【 Weak current College 】 intelligent building control system with variable power distribution


Intelligent buildings and distribution automatic control system distribution intelligence system is the building automation system (BAS), an important part in. Building automation is on the entire system to a comprehensive control and management of opposites. This kind of system to computer local area network for the communication infrastructure, to computer technology as the core, with decentralized control and centralized management capabilities. It and data communication, graphics display, man-machine interface, input and output interface technology, used for device management, data acquisition and process control automation systems.
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(1) power supply monitoring access to high-voltage power line voltage, current, power, power factor and frequency of monitoring and power supply products.
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Dbbs.cnjianzhu.com (2) transformer transformer temperature monitoring, air cooled transformers fan operation, oil cooled transformer oil mild oil level monitoring. Chinese architectural Forum $ O b (n o n Yq ­ J, K
(3) load monitoring levels of load voltage, current, power monitoring, when overload the system to stop low priority load. China building network, building forum, architectural design, construction, building materials, construction, house building, construction, technology gives the low-down, indoor located building materials, construction cost, construction budget, p3J (4) line status monitoring of high voltage lines, outlet, 2 road into the line of contact line breaker status monitoring, fault alarm.
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U Chinese architectural Forum member of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site.  China construction forum is the largest building community! Main power supply interrupted automatically start diesel generator or gas turbine generator sets, power to stop a standby power supply and switching operation. Through the high and low voltage control cabinet automatic switching, energy-saving control of the system; even through turn switch switch, power equipment linkage control; power consumption for tenants of automatic statistical measurement. China building network, building forum, architectural design, construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget ­ n j * Wo _ K0_
(6) supply recovery control
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W,} U6u3pbbs cnjianzhu.com when power is restored, in accordance with a set of priority program, start the device running the motor quickly to restore, avoid all equipment at the start, but the power trip.
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T/x * Y China building network, building forum, architectural design, construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget 2 electrical systems of monitoring and control
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I Chinese architectural Forum member of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site. China construction forum is the largest building communities! 2.1 intelligent building monitoring and control points are divided into the following: Chinese architecture Forum p n r '?, G4t7ED
(1) display of Chinese architecture, architectural design of architectural Forum,, building construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget Y @ K Y2 {­]}
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Including operation, alarm status and more. Display the main wiring diagrams, AC and DC system and UPS systems running figure and operating parameters, the system switch-and fault-correctly distinguish between, on the parameter overload alarm. China building network, building forum, architectural design, construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, engineeringCost, construction budget
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(2) control-including equipment energy efficiency control, order control (chronological control or technological requirements of the control).
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E China construction forum is part of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site.  China construction forum is the largest building community! Including State detection and summary output, integrating records and report generation, accidents, failure to order records, you can query the cause of the accident and displays, tab and print, can draw the load curve and display, print, run the report.
W% C # f:j {1X Chinese architecture Forum (4) compound means at the same time there are two or more monitoring needs. Bbs.cnjianzhu.com 5L 2.2 substation equipment control
Would m0S/L, M m Chinese building network | Forum | design | building materials | construction | construction papers | construction | project management | construction | construction | construction | contracts | architectural decorative architectural University (1) high-voltage line, outlet, contact line breaker remote control.
# U _ [U d} B China building network | Forum | design | building materials | construction | construction papers | construction | project management | construction | construction | construction | contracts | architectural decorative architectural University (2) low-voltage wire, outlet, contact line breaker remote control. China building network, building forum, architectural design, construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget
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(3) the main circuit breaker for remote control, such as the distribution route, fire main circuit breaker, remote control, pump room, cooling machine room, heating station power supply circuit breaker; as well as the station's remote control incoming line circuit breaker.

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(5) power feeder, overcurrent and ground fault protection, three-phase unbalance monitoring, reclosure function, standby power automatic switch.
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(7) of the circuit breaker. Sets the current fast-break protection, over-current protection.
z7{ G;] &Amp; ~ # m Chinese architectural Forum member of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site. China construction forum is the largest building communities! 2.3 standby generator monitoring and control of the measurement and control content are:
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Zj! wR v China Architecture Forum (1) the generator circuit of the electrical parameters of measurement, such as voltage, current, frequency, active power, reactive power, etc. Chinese architectural Forum ^ 0 ~ Yz2W% F ' [
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# W m $ Z [\ $ t China Architecture Forum (4) the generator and the line of control of the switch.
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General 10KV substation needed protection features are:

Y C O1d6_? 9w (1) inlet voltage and frequency of the monitoring phase and relatively trouble, three-phase unbalance, automatic reclosing. Chinese architectural Forum ' c/g IdQ'WB \5U * |
(2) transformer internal overload and failure, thermal overload.
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R China building NET, Forum, architectural design, construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget (3) motor internal overload and failure, power grids and load failure, motor starting condition monitoring. bbs.cnjianzhu.com q(X%ri S-^$I/R \
Bbs.cnjianzhu.com 8M 6Ur 3 intelligent building substation equipment monitoring system form
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LI7ir0qk6x Chinese architectural Forum and distribution equipment monitoring system and other building automation systems from a central control station and station. It's the input signal from the sensor output signal is provided, so that the various switching action or alarm in the control center can install dynamic simulation display and operation panel. It features a display and control the main switch or a circuit breaker status, on a contingency or standby power of control, etc. You can replace the normal control and signal screen. Transformer substation and generally do not need to repeat set signal control screen. Figure 1 is a substation equipment monitoring system devices. Common monitoring system is in distribution device to add some sensors. If you are intelligent circuit breaker or relay with built-in sensor, can be obtained from the communication interface.

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T {Chinese architectural Forum member of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site. China construction forum is the largest building communities! 3.1 sensor (Sensor) and actuator (Actuator) and China construction Forum) p sensor or actuator is will power or non-electric energy into control devices can handle the power of the device. Power sensor is a variety of power such as voltage, current, frequency and power factor is converted to a numeric quantity or a computer can accept standard output signal (current 0 ~ 5A, 4 to 20mA or 0-10V). Used for building management system for building and distribution system for various power monitoring and recording. It has a current transformers, voltage transformers and many parameters of electric power monitor meter. Multi-parameter electric power monitor meter to monitor single or three phase electrical parameters, such as voltage, current, frequency, power factor, harmonic and power, can provide measurement measuring parameter monitoring energy management and other functions. It also provides communication interfaces such as RS485, 4-20mA output or pulse output. Chinese architectural Forum B
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3.2 sub-control/electronic relay and smart breaker bbs.cnjianzhu.comx sub-control according to whether or not to implement closed-loop control functionality into decentralized control type (Distributed Control Panel, DCP) and data acquisition (DataGatheringPanel, DGP). Sub-control main complete real-time control and regulation functions. At present, the General system applies intelligent controllers. This intelligent controller sub-control you can:
L8GN P S3G 1) adopting one-chip computer or the smart controller single board computers. China building network, building forum, architectural design, construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget D
K @ 7 | u K 2) uses the programmable controller (PLC). Bbs.cnjianzhu.com # u: 3) using computer (PC) such as industrial control machine.
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R 3.3 medium voltage switchgear computer protection monitoring system of Chinese building network, architecture, building design, the forum for building construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget ' z_9iN k9R (q; S * X
Intelligent medium voltage switchgear is configured with a computer protection and control unit or e-mail relay, replaces electromechanical relays. Computer protection and control unit is installed in the switch cabinet. It is characterized by protection feature high reliability, high speed, high precision, stability and sensitivity protection optimization portfolio, not subject to the limitations of current transformers have a self test feature and the ability of environmental electromagnetic interference. It also has some new features, such as fault recording, communication, remote control, telemetry, remote, and other functions.
K * r? Q @ # fE; S_ Chinese architectural Forum member of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site.  China construction forum is the largest building community! It has various power metering, monitoring, and alarm function. To meet different application requirements such as wire and feeder lines, transformers, motors, Busbar protection, with the appropriate products. It provides the perfect monitoring protection features, General with network communication interfaces: RS232, RS485, can access BAS system, can realize remote monitoring.
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G Z + F * Q m computer protection monitoring system can reduce the size of the control room to reduce control cable, reduce the maintenance effort to further enhance the reliability of power supply. In the computer protection device is divided into input circuit (Exchange interface unit), export loop (DC interface unit), the CPU-unit, storage, man-machine interface and the power supply. China construction Forum # {1) CPU unit of Chinese architecture, architectural design of architectural Forum,, building construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget nkv j2An Q W)
For relay protection equipment for core, used to complete the data collection is computation logic processing, making features such as jumping-off command. You can also communicate with the parent control of the machine, the distance to modify the value passed to protect information, print reports, and other functions. Because of the power system normal run-time parameter and the parameter when the difference between the very poor, some even from dozens of times, so the input signal wide dynamic range, generally use a distributed structure. In accordance with the unit setting CPU, dual machine work in parallel.
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There is a fixed value Z-u memory and program memory and data memory, etc. Setting memory storage of the various protection set value, the chip has a power loss of functionality, and content may modify content online. Data memory RAM is used to access the scene of a variety of input and output, outcome and intermediate operations, according to the judgment results you need, when you read, write or overwrite, general use 22K chips. Program memory is used to store has been programmed and has a protective function of the application, generally used to overwrite memory EPROM.
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A) h _? A5iX] power system of current, voltage, digital, voltage transformers, current transformer into 5A 100V or signal, since this signal value far exceeds the microcomputer acceptable voltage standards; these parameters in failure varies greatly, the computer can only identify voltage, so you must put a voltage transformer, the transformer voltage current transformed via communication interface circuit into computer may receive voltage values. And failure cases does not exceed this range. In order to limit the input signal is the highest frequency, low-pass filter, sampling frequency should be equal to or greater than the measured signal frequency. The failure of the power system may appear high harmonics, the actual sampling frequency is the frequency of several times or even dozens of times. In addition, protection of fast action and program needs adequate execution time, in order to facilitate the operation, the sampling frequency used 600Hz.
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It contains the tripping relay outletReader and magnetic latching relay and light emitting diode lighting signal composed of. Due to the sampling of discrete digital is the instantaneous value, cannot be directly used to determine the status of the system, you must use a mathematical system characterization system characteristics of the parameters and the corresponding setting value, thus making the protection or not of judgment. In particular, power system contains nonlinear magnetic components, distributed capacitance, compensation capacitance, making short-circuit current in the attenuation of non-periodic components and high frequency components. In order to overcome these factors, in addition to the use of filtering, you must use the appropriate mathematical methods. China building network, building forum, architectural design, construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget Y # f9LN j & t:Z _ n
5) man-machine interface, keyboard, communication port, printer, display unit
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Low-voltage distribution systems with integrated automation can be achieved in two ways: one way is to use intelligent circuit breaker; another way is to use intelligent control unit. And intelligent control unit is divided into two kinds, one kind for motor controller, another to feed the controller. From a technical and economic point of view into consideration at present most of the works on the large circuit breaker adopts the frame breaker breaker, and on other circuit adopts intelligent control unit. China building network, building forum, architectural design, construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget 2Ka.} -bg#Oy
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Intelligent low-voltage circuit breakers with a microprocessor controller, its protective function with long delay, the short delay, transient overcurrent protection, earthing, under-voltage protection, etc. In addition, you can load monitoring and control, remote display, measuring voltage, current, active power, reactive power, power factor, harmonic and power, etc. Determination of fault currents, fault display, ground fault, selective blocking, data remote transmission, post. Through the network communication interface RS232, RS485, RS422 can access BAS system. It can be used for data exchange with the host, you can accept the super-computer directive, the can and PC for data exchange that can be used by the host computer on circuit breaker for remote control operation on the circuit breaker of the setting value is modified. It has a built-in current transformer.
‑A+fw#P(| fE;} China construction forum is part of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site.  China construction forum is the largest building community! 2) Intelligent motor controller Chinese architectural Forum member of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site. China construction forum is the largest building communities! & f6Z (6M Y 8w ‑ F_
Intelligent motor controller can provide motor protection and monitoring. Intelligent motor controller can provide protection functions of overload, phase, underrun, empty, stalling, leakage current, phase current imbalances, speed, temperature, etc. Intelligent motor controller can be applied to motor direct start, reverse, direct start additional control unit, Star/Delta-start, auto-transformer starter, soft start, run. Its display function, communication capabilities and intelligent circuit breaker. In addition, you have a stored function, you can store recent running status, fault alarm information and various parameter values, it also has the communication function. China building network, building forum, architectural design, construction, construction materials, project management, construction supervision, constructionBudget, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction cost, construction budget I:C d:g 0w +?
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3) Intelligent feeder controller
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R W ' @ P China building network | Forum | design | building materials | construction | construction papers | construction | project management | construction | construction | construction contract | architectural decoration | University of architecture and an intelligent feeder controller basic intelligent motor controller, its protection is relatively simple, such as a grounding, overcurrent protection function.
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3.5 generator microcomputer monitoring system
I z I I Ty/(n + F "China Construction Network | Forum | design | building materials | construction | construction papers | construction | project management | construction | construction | construction | contracts | architectural decorative architectural University generator microcomputer system can provide generators of electric parameters and thermal parameters, you can set the generator unit computer control system and substation Management Branch networking. Substation management branch may be the generator runs, starting, stopping, controlling, as shown in Figure 2. ­Z m
4 distribution system control software features
1g% \ would 6C) o ~) J7A Chinese building network, building forum, architectural design, construction, construction materials, project management, construction supervision, construction budgets, building security, house building, construction, technology gives the low-down, interior design, home building materials, construction costs, General construction budget software and equipment, the use of specialized software, such as power distribution system monitoring and energy management software, you can use a general monitoring software, also known as supervisory control and data acquisition software (SCADA). On software requirements: a good man-machine interface, able to satisfy the user a wide range of requirements, it provides the basic features are: Chinese architecture Forum member of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site. China construction forum is the largest building communities! + [# 2G 0mp R
(1) real-time data acquisition, real-time database. Chinese architectural Forum & x:r P3Y Ye.J)
(2) remote control, power limit, accident to the police.
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D u d China building network | Forum | design | building materials | construction | construction papers | construction | project management | construction | construction | construction | contracts | architectural decorative architectural University (4) various power telemetry and chart displays such as system energy distribution map, system, single line diagram.
Ab8z B FKk2W4c5n Y China construction forum is part of the China building network (www.cnjianzhu.com), is the construction industry portal, based on the traditional construction industry and the Internet to build a comprehensive, industry-specific portal site.  China construction forum is the largest building community! (5) the report generation feature such as a daily report, 24h voltage and current reports, short reports, power balance report. \2B/\ ?r ok
(6) the exchange of information with BA system.
4 {+ A ­ D ‑ Nf Chinese building network | Forum | design | building materials | construction | construction papers | construction | project management | construction | construction | construction | contracts | architectural decorative architectural University system with software in addition to General data processing functions, should have the following features (fitted with a standby power supply applications):
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R China building network | Forum | design | building materials | construction | construction papers | construction | project management | construction | construction | construction | contracts | architectural decorative architectural University (1) power processing power loses power, the generating capacity will automatically follow the load input/shut-off, at which point only the fire accident procedure and manual operations can perform output operations. Ie7b"T sl5H;@
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(2) electricity demand monitoring/control automatic peak electricity demand control, control, power consumption exceeds the amount of power supply contracts, the removal of the load. China building network | Forum | design | building materials | construction | construction papers | construction | project management | construction | construction | construction | contracts | architectural decorative architectural University g ~
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(3) event program watch state change, alarm, specify the recovery conditions, set state action, you can make and/or set actions such as logical conditions.
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Y_0p% N China building network | Forum | design | building materials | construction | construction papers | construction | project management | construction | construction | construction | contracts | University of architecture building decoration power, electric power generation switch to commercial, you can follow the automatic or manual operation of power directive, and in accordance with the electric power generation is the force driving control let machines out of operation, and then side reference timetable aside for the moment is in operation without power machines automatically starting (inputs). In some power outages, you can manually restore the power supply.

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