CN201846127U - Programmable switching system for alternating current power supply in transformer substation - Google Patents
Programmable switching system for alternating current power supply in transformer substation Download PDFInfo
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- CN201846127U CN201846127U CN2010202498663U CN201020249866U CN201846127U CN 201846127 U CN201846127 U CN 201846127U CN 2010202498663 U CN2010202498663 U CN 2010202498663U CN 201020249866 U CN201020249866 U CN 201020249866U CN 201846127 U CN201846127 U CN 201846127U
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- power supply
- alternating current
- voltage
- programmable
- circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model relates to an intelligent programmable logic control system for power utilization in a transformer substation, in particular to a programmable switching system for an alternating current power supply in a transformer substation. The system is characterized by comprising a programmable controller; the programmable controller is connected with all power supply incoming wires and bus bars through an alternating current acquisition circuit so as to obtain the three-phase voltage and bus bar voltage at the side of the incoming wires; the programmable controller is connected with the corresponding power supply switch through an extended I/O circuit so as to obtain the position information of the power supply switch; the programmable controller is further connected with the power supply switch through an isolation driving amplifying circuit so as to control the on-off state of the corresponding power supply switch. The system is applied to occasions where two or more than two sets of N+1 low-voltage power supply are frequently alternated for working; at least one power supply works when accidents occur; the system automatically recovers the original working state after the accidents disappear; the continuous operation of power supply system can be guaranteed efficiently and reliably without any manual intervention; and the system is particularly applied to 35-750 kV unattended transformer substations.
Description
Technical field
The utility model relates to a kind of transformer station station electricity consumption intelligence programmable logic control device, especially low-voltage alternating current power supply programmable switching system of substation.
Background technology
In the 110kV unattended operation transformer station, general two stations that adopt of used power supply are equipped with mode of operation with change high-pressure side paired running, low-pressure side one main.Active and standby switching relies on used working power switch auxiliary contact directly or through time-delay relay to start the stand-by power supply input fully.This used power supply main standby commutation circuit exists comparatively serious defective, mainly shows following aspects:
Stand and to control by electricity side with becoming place circuit operating condition.Outside having, go to the station to meet somebody with in the transformer station that becomes, when outside go to the station to meet somebody when becoming circuit generation single-phase earthing that the T of institute connects or the single-phase fusing of high pressure fall insurance, phase shortage, fault such as under-voltage can appear in used power supply low-pressure side, existingly usedly be equipped with adaptive switched system and be limited by the restriction of self components and parts defective, basic identification does not have the above-mentioned fault that has occurred, and finishes due automatic switchover work.Automatic switching identification target is incomplete after the main power supply fault, prepared auto restart function basis imperfection.The existing active and standby switching criterion of switched system is comparatively simple, just main working power switch auxiliary contact is moved and presses the detection of pressing with nothing to differentiate as starting the unique criterion of stand-by power supply, lack to have, and very easily causes malfunction.When on bus or lead-out wire the continuation fault taking place, stand-by power supply might repeatedly be put on the fault element, causes more serious accident.Active and standby switch logic relies on the traditional relay control loop to realize that relay is many fully, and the contact is many, belongs to the hard logic category.Adhesion or oscillation intensity occur when big at relay contact, be easier to occur reliability decrease phenomenons such as malfunction, tripping.
The utility model content
The purpose of this utility model provides a kind of low-voltage alternating current power supply programmable switching system of substation, can realize having transformer station's low-voltage alternating-current standby electric power automatic throwing case of self-healing, self adaptation, automatic recovery ability.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of low-voltage alternating current power supply programmable switching system of substation, its special feature is, comprise Programmable Logic Controller, thereby this Programmable Logic Controller is connected with all electric power incoming lines and bus and obtains inlet wire side three-phase voltage and busbar voltage by exchanging acquisition circuit, thereby this Programmable Logic Controller is connected with the respective electrical source switch by the expansion I/O circuit and obtains the mains switch positional information, thereby this Programmable Logic Controller also is connected the switching of controlling the respective electrical source switch by the isolation drive amplifying circuit with mains switch.
Wherein Programmable Logic Controller also is connected with a memory.
The utility model is specially adapted to two covers or overlaps the used low-tension supply of N+1 more and often take turns the place that changes jobs, when accident occurring, will have at least one road power work, eliminate the former mode of the automatic recovery of back system in accident and move, do not need manual intervention just can effectively, reliably guarantee the continuous service of electric power system fully.Having improved the station with the adaptability of electrical control equipment, perfect transformer station stand power consumption equipment and comprehensive automation collection control, scheduling station data exchange capability with modern electric production management system; Owing to just existing used power-supply system control loop is changed, elements such as the circuit breaker of major loop, air switch, power cable are not changed, so the overall application cost is lower.The substation that can it be widely used in various electric pressures under the little situation of improvement cost is gone in the system with power supply low pressure prepared auto restart, especially is adapted to the 35-750kV unattended operation transformer station.
Description of drawings
Accompanying drawing 1 is a schematic block circuit diagram of the present utility model;
Accompanying drawing 2 is the theory diagram of expansion I/O circuit part of the present utility model;
Accompanying drawing 3 is the theory diagram of isolation drive amplification circuits of the present utility model;
Accompanying drawing 4 is the theory diagram of interchange acquisition circuit part of the present utility model;
Accompanying drawing 5 is the main program flow chart of PLC in the utility model.
Embodiment
Come the utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, Programmable Logic Controller adopts Omron-cpm1A-PLC, and its identification and action logic of finishing operational mode is differentiated, action logic output.
As shown in Figure 2, the expansion I/O circuit has adopted special-purpose anti-electromagnetic interference module and circuit, makes device have very strong antijamming capability, and the photoelectricity isolation has been adopted in mains switch, disconnecting link positional information switching value importation, add filter circuit simultaneously, forceful electric power and light current separate fully; During detection if the mains switch closure, then+and 12V voltage is added in 1,2 ends of optocoupler, and 3,4 end conductings of corresponding optocoupler are detected by the P27 pin of 8255I/O extended chip, thereby latch chip by 74533p again and send the switching information that PLC obtains the respective electrical source switch to, vice versa.
As shown in Figure 3, PLC output DC+24V signal was added in 1,2 ends of optocoupler when the isolation drive amplifying circuit detected, 3,4 end conductings of corresponding optocoupler, this moment triode by, relay J 1 is failure to actuate, on the contrary relay J 1 action.
As shown in Figure 4, exchange acquisition circuit and gather main power supply inlet wire side ABC three-phase voltage, bus phase voltage L, after transformer PT step-down, become 0～5V signal through the ac electric transmitter device again and deliver to PLC electric quantity acquisition unit, the electric quantity acquisition unit is input to the Omron-cpm1A-PLC unit as criterion after by the A/D conversion and differentiates.
As shown in Figure 5, whether main power supply inlet wire side ABC three-phase voltage, busbar voltage U ￠ (phase-to-ground voltage) detect U ￠ greater than definite value UT as enabling signal, and UT generally is taken as 70% of phase voltage standard value.Carry out voltage ratio and judge,, still set up through delay confirmation if a certain less than 0.7UT, think that then main power supply breaks down, it is sent trip command, after circuit breaker auxiliary contact location status confirms that it is in gate-dividing state, again the stand-by power supply lead-in circuit breaker is sent out reclosing command; After operation a period of time, if main power supply is normal by fault recovery, then the automatic disconnection stand-by power supply drops into main power supply, makes the former operational mode of system restoration.And the action logic part is mainly finished by trapezoid figure program, functions such as the transmitting-receiving that the data computation that realization obtains, inner parameter calculate, communication data is pressed certain communications protocol, deciliter logic control of low pressure incoming feeder circuit breaker, relative program software belongs to state of the art.
1, the utility model comprises the control program software that utilizes the establishment of CX-P programming software, comprise with the Programmable Logic Controller being core and being aided with station electricity consumption inlet wire that relevant peripheral circuit forms or female connection prepared auto restart automatic switching system, be included as and realize remote measurement, remote signalling, distant control function and the various standardization of adopting, modular microprocessor, data communication interface.
2, the control program software that utilizes the CX-P programming software to work out is realized different soft logic settings, and intelligence adapts to the throwing demand fully of multiple function, can realize the automatic closing of various operational modes complexity and logic function complexity simultaneously.
3, be core with the Programmable Logic Controller and be aided with relevant peripheral circuit and finally substitute conventional electromechanical relay and control loop fully.
4, by the RS485 communication system, send various remote measurements, the remote signals of station power consumption equipment to the control of distant place comprehensive automation collection, scheduling station, can carry out concentrator station formula distant place switching to the system for use in carrying low-pressure side, the time of also can carrying out in the program software is provided with, and realizes that automatic taking turn regularly switches.
5, be specially adapted to two and overlap or overlap more the place that the frequent wheel of the used low-tension supply of N+1 changes jobs, can realize simple or complicated system for use in carrying automatic closing function.Can measure the ruuning situation of judging bus and many circuits simultaneously, and according to different modes and state, intelligence is carried out different automatic closing strategies, when accident occurring, will have at least one road power work, eliminate the former mode of the automatic recovery of back system in accident and move, do not need manual intervention just can effectively, reliably guarantee the continuous service of electric power system fully.
Low pressure inlet wire or female connection section breaker that 6, can adapt to any manufacturer production.Just existing used power-supply system control loop is changed, elements such as the circuit breaker of major loop, air switch, power cable are not changed, and the overall application cost is lower.
The unattended operation transformer station station with power frequency AC continuously, stable, reliably be the primary condition of a secondary device safe operation in the station; especially the power utilization system safety under accident conditions is switched, and is most important especially to reducing causality loss, the protection person and device security.
1, solves outer going to the station to meet somebody with the used low-pressure system of unattended station that the becomes problem that can not automatically switch in phase shortage, when under-voltage arranged, for system for use in carrying intelligence when the accident is switched, just often regularly switching provides a kind of brand-new controlling platform.
2, intelligent decision system for use in carrying I, II section operating condition when the permanent short trouble of low-pressure end occurring, are avoided system break-down after the used prepared auto restart input, the low-voltage alternating-current load decompression of standing entirely.
3, backup auto-activating device drops into response time, avoid standing the entirely long-term phase shortage of low-voltage load, under-voltage operation after the shortening unattended station system for use in carrying fault.
4, reduce because of system for use in carrying phase shortage, under-voltage electromagnetic impact dynamics, avoid a little equipment fault of causing because of power issue, prolong equipment life equipment such as DC charging module, high-voltage electric isolating switch, axial flow motor, forced-oil-air cooling blower fans.
5, can realize simple or complicated system for use in carrying automatic closing function.Can measure the ruuning situation of judging bus and many circuits simultaneously, and according to different modes and state, intelligence is carried out different automatic closing strategies, significantly improved the operating reliability of switching system for use in carrying.
6, can carry out concentrator station formula distant place switching to the system for use in carrying low-pressure side, the time of also can carrying out in the program software is provided with, and realizes that automatic taking turn regularly switches.
Claims (2)
1. low-voltage alternating current power supply programmable switching system of substation, it is characterized in that: comprise Programmable Logic Controller, thereby this Programmable Logic Controller is connected with all electric power incoming lines and bus and obtains inlet wire side three-phase voltage and busbar voltage by exchanging acquisition circuit, thereby this Programmable Logic Controller is connected with the respective electrical source switch by the expansion I/O circuit and obtains the mains switch positional information, thereby this Programmable Logic Controller also is connected the switching of controlling the respective electrical source switch by the isolation drive amplifying circuit with mains switch.
2. low-voltage alternating current power supply programmable switching system of substation as claimed in claim 1 is characterized in that: wherein Programmable Logic Controller also is connected with a memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202498663U CN201846127U (en) | 2010-07-07 | 2010-07-07 | Programmable switching system for alternating current power supply in transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202498663U CN201846127U (en) | 2010-07-07 | 2010-07-07 | Programmable switching system for alternating current power supply in transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN201846127U true CN201846127U (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202498663U Expired - Fee Related CN201846127U (en) | 2010-07-07 | 2010-07-07 | Programmable switching system for alternating current power supply in transformer substation |
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| CN (1) | CN201846127U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872999A (en) * | 2010-07-07 | 2010-10-27 | 宁夏电力公司吴忠供电局 | Low-voltage alternating current power supply programmable switching system of substation |
-
2010
- 2010-07-07 CN CN2010202498663U patent/CN201846127U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872999A (en) * | 2010-07-07 | 2010-10-27 | 宁夏电力公司吴忠供电局 | Low-voltage alternating current power supply programmable switching system of substation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110525 Termination date: 20130707 |