CN102916482A - Low-voltage switching circuit - Google Patents
Low-voltage switching circuit Download PDFInfo
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- CN102916482A CN102916482A CN2012104366075A CN201210436607A CN102916482A CN 102916482 A CN102916482 A CN 102916482A CN 2012104366075 A CN2012104366075 A CN 2012104366075A CN 201210436607 A CN201210436607 A CN 201210436607A CN 102916482 A CN102916482 A CN 102916482A
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- load
- power supply
- switch group
- switching 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
- 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
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Abstract
The invention discloses a low-voltage switching circuit, and relates to the field of automation of power systems. The low-voltage switching circuit at least comprises a sensitive load and a main power supply and a backup power supply which are used for supplying power to the sensitive load, wherein a current monitoring unit and a first switch group are sequentially arranged on a connection circuit between the main power supply and the sensitive load; and a second switch group is arranged between the sensitive load and the backup power supply. The low-voltage switching circuit also comprises a control unit and has an initial position state and a switching position state. The low-voltage switching circuit has the beneficial effects that the whole circuit is simple in structure and works reliably and stably; an effect that any quick sensitive load such as a motor, a relay and a frequency converter in the conventional industry is sensitive to power dazzling is achieved; and therefore, various harms caused by power dazzling are fundamentally avoided.
Description
Technical field
The invention belongs to power system automatic field, and in particular to a kind of low pressure switching circuit.
Background technology
At present, in petrochemical industry, chemical industry, fiber, metallurgical casting etc. work continuously type enterprise, low-voltage equipment occupies most of.Most loads in these low-voltage equipments are to shaking electricity and its sensitivity；After original electric power system power supply is short-circuited failure; voltage rapidly falls; if can not be switched power in time within the limited time on stand-by power supply; the load of these responsive types will be shut down; cause production process accidental interruption; hundreds thousand of or even up to a million losses are caused, or even cause the blast of equipment etc. badly damaged, restarting production process is also to need high cost.Therefore, in the type enterprise that works continuously, it is badly in need of a kind of low pressure apparatus for fast switching, the rolling electrical phenomena of the real diagnostic system power supply of energy is simultaneously switched to stand-by power supply in time, fundamentally to avoid the economic loss of enterprise.
The content of the invention
It is an object of the invention to provide a kind of simple in construction and reliable and stable work low pressure switching circuit, it shake circuit being switched fast by main power source to stand-by power supply that it is ensured while electrical phenomena is monitored in real time when rolling electrical phenomena occurs for circuit that can realize.
To achieve the above object, present invention employs following technical scheme：A kind of low pressure switching circuit, it is characterised in that：At least include main power source and stand-by power supply that sensitiveness loads and the energy is loaded for supplying sensitiveness, current monitoring unit and first switch group are sequentially arranged on connection circuit between the main power source and sensitiveness load, second switch group is disposed between the sensitiveness load and stand-by power supply, the switching circuit that compresses also includes control unit；There are initial and two kinds of location status of switching in the low pressure switching circuit：
When low pressure switch unit is located at original state, main switch group is closure state, and auxiliary switch group is off-state, and sensitiveness load is powered by main power source；
When the reduction of sensitiveness load voltage, current monitoring unit transtation mission circuit low-voltage signal is to control unit, and control unit receives the information and controls respective switch group to act, and now main switch group disconnects, and auxiliary switch group closure, low pressure switch unit is located at switching state.
The beneficial effects of the present invention are：When using after said structure, the timing monitoring for circuit at this is realized by the current monitoring unit being arranged in advance on main circuit, once circuit occur shakes electrical phenomena, now the sensitiveness load voltage is reduced, current monitoring unit transtation mission circuit low-voltage signal is to control unit, and control unit receives the information and controls respective switch group to act, so as to drive main switch group to disconnect, auxiliary switch group is closed, and is powered with the conversion by main power source to stand-by power supply for completing sensitiveness load.Whole circuit structure simply reliable and stable work, it is possible to resolve any quick responsive type loads the sensitive question to shaking electricity, including motor and relay and frequency converter even load in the industry at present, so as to fundamentally solve the various harm that rolling electricity is caused.
Brief description of the drawings
Fig. 1 is the original state figure before the action of embodiments of the invention；
Fig. 2 is the initial "on" position schematic diagram of circuit shown in Fig. 1；
Fig. 3 is that the rolling TURP of circuit shown in Fig. 2 changes rear view.
Embodiment
A kind of low pressure switching circuit, at least include main power source and stand-by power supply that sensitiveness loads and the energy is loaded for supplying sensitiveness, current monitoring unit and first switch group are sequentially arranged on connection circuit between the main power source and sensitiveness load, second switch group is disposed between the sensitiveness load and stand-by power supply, the switching circuit that compresses also includes control unit；There are initial and two kinds of location status of switching in the low pressure switching circuit：
When low pressure switch unit is located at original state, main switch group is closure state, and auxiliary switch group is off-state, and sensitiveness load is powered by main power source；
When the reduction of sensitiveness load voltage, current monitoring unit transtation mission circuit low-voltage signal is to control unit, control unit receives the information and controls respective switch group to act, now main switch group disconnects, auxiliary switch group is closed, low pressure switch unit is located at switching state, so that the conversion by main power source to stand-by power supply for completing sensitiveness load is powered.
The actual switching state of the present invention is referred to shown in Fig. 1-3, because current monitoring unit can observe circuit conditions in good time, and quickly decision circuitry can shake the generation of electricity while circuit voltage changes and send action command, and the purpose for being switched fast switches set is reached, it is final to ensure the rapid of overall switching time.The reduction of its switching time, current quick responsive type load any in the industry can be solved to shaking electric sensitiveness, including motor and relay and frequency converter etc., its selection for switching switching part also may be selected to be vortex patern fast chopper etc., so as to ensure that it is switched fast electric energy power, fundamentally to solve to shake the various harm that electricity is caused.
It is used as present invention further optimization scheme：The sensitiveness load is is arranged in parallel in the motor load 11 on main circuit and inverter load 21, and branch's branch road residing for the motor load 11 is tie point, and branch's branch road residing for inverter load 21 is the second branch road；Current monitoring unit includes the first current monitoring unit 12 and the second current monitoring unit 22 on the second branch road being located in tie point, and the main switch group includes the first main switch K1 and the second main switch K2 on the second branch road being located in tie point；The motor load branch road and inverter load branch road being arranged in parallel accordingly are arranged on stand-by power supply, the auxiliary switch group includes the first auxiliary switch K3 and the second auxiliary switch K4 on inverter load branch road being located on motor load branch road, motor load branch route stand-by power supply is directly communicated at motor load 11 through the first auxiliary switch K3, inverter load branch route stand-by power supply is directly communicated at inverter load 12 through the second auxiliary switch K4, and its practical structures can refer to shown in Fig. 2-3.
In view of when actually used, the present invention is to be designed for the sensitiveness of type load of working continuously, and its engineer applied only switching responsive type that is also contemplated for trying one's best during switching is loaded, and is not disrupted this solution ensure the operation of sensitive loads；Rather than sensitive loads, without switching, stand-by power supply capacity and contact capacity can be reduced accordingly.Its frequency converter or motor can many be merged into one group of switching, important sensitive loads are it is also contemplated that with single switching, namely lifted in embodiment as Figure 2-3, it will equally be set on its stand-by power supply such as the consistent motor of main power source and inverter load circuit, to constitute corresponding inverter load branch road and motor load branch road, also relative set such as coaxial main switch group consistent motor load branch switch K5 and inverter load branch switch K6 thereon simultaneously, now the first main switch K1, first auxiliary switch K3 and motor load branch switch K5, first auxiliary switch K3 respectively forms a pair of motors load switching combining, second main switch K2, second auxiliary switch K4 and inverter load branch switch K6, second auxiliary switch K4 respectively forms a pair of inverter load switching combinings, the remarkable advantage of this mode is, when non-sensitive load short circuits cause to shake electricity in occurring outer net rolling electricity or Intranet, it can switch over.Fig. 1-3 is its application diagram, and its sensitive loads includes motor and frequency converter, while each current monitoring unit and switches set are to be arranged from the power supply direction of respective branch to its load direction successively order.In figure, two dashed rectangles at connection main power source constitute motor load 11 and inverter load 21, connect stand-by power supply（Can be other outer network sources of relative main power source during practical application）Two dashed rectangles at place constitute the proportional sensitivity load of motor, inverter load branch road.Assuming that original state is：K1 is closed, K2 is closed, K3 is opened, K4 is opened, K5 closures, K6 closures, i.e. motor is powered by the first main switch K1 from main power source at motor load 11, frequency converter is powered by the second main switch K2 from main power source at inverter load 21, and the motor in motor load branch road is powered by motor load branch switch K5 from stand-by power supply, and the frequency converter in inverter load branch road is powered by inverter load branch switch K6 at stand-by power supply.When the reduction of main circuit voltage, it is zero to flow through K1 electric currents, flows through K2 electric current increase, and control unit is judged as that main power source shakes the non-sensitive load short circuits in electric fault or the low voltage electric network（Be short-circuited phenomenon at a points as shown in Figure 1）, now control unit hair switching command：K1, K2 separating brake, K3, K4 close a floodgate, with this complete corresponding inverter load 21 and motor load 11 from main power source to stand-by power supply at switching purpose.
In view of the high current working environment residing for current monitoring unit, to ensure effective monitoring effect during its work for circuital current, the current monitoring unit is Rogowski coil type transformer.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.It should be understood by those skilled in the art that; the present invention is not limited to the above embodiments; merely illustrating the principles of the invention described in above-described embodiment and specification; without departing from the spirit and scope of the present invention; various changes and modifications of the present invention are possible, and these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appending claims and its equivalent thereof.
Claims (4)
1. a kind of low pressure switching circuit, it is characterised in that：At least include main power source and stand-by power supply that sensitiveness loads and the energy is loaded for supplying sensitiveness, current monitoring unit and first switch group are sequentially arranged on connection circuit between the main power source and sensitiveness load, second switch group is disposed between the sensitiveness load and stand-by power supply, the low pressure switching circuit also includes control unit；There are initial and two kinds of location status of switching in the low pressure switching circuit：
When low pressure switch unit is located at original state, main switch group is closure state, and auxiliary switch group is off-state, and sensitiveness load is powered by main power source；
When the reduction of sensitiveness load voltage, current monitoring unit transtation mission circuit low-voltage signal is to control unit, and control unit receives the information and controls respective switch group to act, and now main switch group disconnects, and auxiliary switch group closure, low pressure switch unit is located at switching state.
2. low pressure switching circuit according to claim 1, it is characterised in that：The sensitiveness load is to be arranged in parallel in the motor load on main circuit（11）And inverter load（21）, the motor load（11）Residing branch's branch road is tie point, inverter load（21）Residing branch's branch road is the second branch road；Current monitoring unit includes the first current monitoring unit being located in tie point（12）With the second current monitoring unit on the second branch road（22）, the main switch group is including being located at the first main switch K1 in tie point and the second main switch K2 on the second branch road；The motor load branch road and inverter load branch road being arranged in parallel accordingly are arranged on stand-by power supply, the auxiliary switch group includes the first auxiliary switch K3 and the second auxiliary switch K4 on inverter load branch road being located on motor load branch road, and motor load branch route stand-by power supply is directly communicated to motor load through the first auxiliary switch K3（11）Place, inverter load branch route stand-by power supply is directly communicated to inverter load through the second auxiliary switch K4（12）Place.
3. low pressure switching circuit according to claim 1 or 2, it is characterised in that：Each current monitoring unit and switches set are to be arranged from the power supply direction of respective branch to its load direction successively order.
4. low pressure switching circuit according to claim 3, it is characterised in that：The current monitoring unit is Rogowski coil type transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436607.5A CN102916482B (en) | 2012-11-05 | 2012-11-05 | A kind of low pressure commutation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436607.5A CN102916482B (en) | 2012-11-05 | 2012-11-05 | A kind of low pressure commutation circuit |
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| Publication Number | Publication Date |
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| CN102916482A true CN102916482A (en) | 2013-02-06 |
| CN102916482B CN102916482B (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210436607.5A Active CN102916482B (en) | 2012-11-05 | 2012-11-05 | A kind of low pressure commutation circuit |
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| CN (1) | CN102916482B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022565A (en) * | 2013-02-28 | 2014-09-03 | 华为技术有限公司 | Power distribution device and method |
| CN104332989A (en) * | 2014-10-24 | 2015-02-04 | 清华大学 | Active power distribution network voltage dip treatment method based on eddy current drive quick breaker |
| CN114236203A (en) * | 2021-11-29 | 2022-03-25 | 国网北京市电力公司 | Load control system, load control method, storage medium, and electronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201146397Y (en) * | 2008-01-17 | 2008-11-05 | 孙毅彪 | Intelligent rapid emergency power supply system |
| WO2010092580A1 (en) * | 2009-02-16 | 2010-08-19 | Flywheel Energy Ltd. | Accurate frequency regulation for uninterruptible electric power supply |
| CN102570590A (en) * | 2012-01-05 | 2012-07-11 | 青岛经济技术开发区创统科技发展有限公司 | Solid-state changeover switch |
| CN202949277U (en) * | 2012-11-05 | 2013-05-22 | 安徽国科电力设备有限公司 | Low-voltage switching circuit |
-
2012
- 2012-11-05 CN CN201210436607.5A patent/CN102916482B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201146397Y (en) * | 2008-01-17 | 2008-11-05 | 孙毅彪 | Intelligent rapid emergency power supply system |
| WO2010092580A1 (en) * | 2009-02-16 | 2010-08-19 | Flywheel Energy Ltd. | Accurate frequency regulation for uninterruptible electric power supply |
| CN102570590A (en) * | 2012-01-05 | 2012-07-11 | 青岛经济技术开发区创统科技发展有限公司 | Solid-state changeover switch |
| CN202949277U (en) * | 2012-11-05 | 2013-05-22 | 安徽国科电力设备有限公司 | Low-voltage switching circuit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022565A (en) * | 2013-02-28 | 2014-09-03 | 华为技术有限公司 | Power distribution device and method |
| CN104022565B (en) * | 2013-02-28 | 2016-03-02 | 华为技术有限公司 | A kind of power distribution equipment and method |
| CN104332989A (en) * | 2014-10-24 | 2015-02-04 | 清华大学 | Active power distribution network voltage dip treatment method based on eddy current drive quick breaker |
| CN104332989B (en) * | 2014-10-24 | 2016-06-29 | 清华大学 | The active distribution network voltage dip administering method of fast chopper is driven based on eddy current |
| CN114236203A (en) * | 2021-11-29 | 2022-03-25 | 国网北京市电力公司 | Load control system, load control method, storage medium, and electronic device |
| CN114236203B (en) * | 2021-11-29 | 2023-10-24 | 国网北京市电力公司 | Load control system, method, storage medium and electronic device |
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| CN102916482B (en) | 2015-08-12 |
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Effective date of registration: 20170327 Address after: 200233 Shanghai Caohejing Songjiang hi tech park Xinzhuan Highway No. 518, building 23, room 526 Patentee after: Shanghai Hekai Electrical Science & Technology Co., Ltd. Address before: No. 28 Jinhua Avenue Shuangfeng Industrial Zone, Changfeng County of Hefei City, Anhui province 231100 Patentee before: Anhui Guoke Electric Power Equipment Co.,Ltd. |