CN102916482B - A kind of low pressure commutation circuit - Google Patents
A kind of low pressure commutation circuit Download PDFInfo
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- CN102916482B CN102916482B CN201210436607.5A CN201210436607A CN102916482B CN 102916482 B CN102916482 B CN 102916482B CN 201210436607 A CN201210436607 A CN 201210436607A CN 102916482 B CN102916482 B CN 102916482B
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- load
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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
Abstract
A kind of low pressure commutation circuit, relate to power system automatic field, at least comprise sensitiveness load and for the main power source that supplies the sensitiveness load energy and stand-by power supply, arrange current monitoring unit and the first switches set successively on connecting circuit between described main power source and sensitiveness load, be furnished with second switch group between described sensitiveness load and stand-by power supply, described in compress commutation circuit and also comprise control unit; Described low pressure commutation circuit exists initial and switches two kinds of location statuss.Beneficial effect of the present invention is: whole circuit structure is reliable and stable work simply, the sensitive question that any quick responsive type load is electric to rolling in the industry at present can be solved, comprise motor and relay and frequency converter even load, thus fundamentally can solve and shake the various harm that electricity causes.
Description
Technical field
The invention belongs to power system automatic field, be specifically related to a kind of low pressure commutation circuit.
Background technology
At present, work continuously in type enterprise at petrochemical industry, chemical industry, fiber, metallurgical casting etc., low-voltage equipment occupies great majority.Most loads in these low-voltage equipments are electric and responsive to rolling; After original electric power system power supply is short-circuited fault; voltage falls rapidly; if can not in time within the limited time by electrical source exchange on stand-by power supply; these responsive type loads will be shut down; cause production process accidental interruption; cause loss hundreds thousand of and even up to a million, even cause the blast of equipment etc. badly damaged, restarting production process is also need high cost.Therefore, working continuously in type enterprise, be badly in need of a kind of low pressure apparatus for fast switching, the rolling electrical phenomena of diagnostic system power supply that can be real is also switched to stand-by power supply, in time fundamentally to avoid the economic loss of enterprise.
Summary of the invention
The object of this invention is to provide the simple and low pressure commutation circuit of reliable and stable work of a kind of structure, its can realize circuit is shaken to guarantee while electrical phenomena Real-Time Monitoring its shake electrical phenomena occur time circuit by main power source to the quick switching of stand-by power supply.
For achieving the above object, present invention employs following technical scheme: a kind of low pressure commutation circuit, it is characterized in that: at least comprise sensitiveness load and for the main power source that supplies the sensitiveness load energy and stand-by power supply, arrange current monitoring unit and the first switches set successively on connecting circuit between described main power source and sensitiveness load, be furnished with second switch group between described sensitiveness load and stand-by power supply, described in compress commutation circuit and also comprise control unit; Described low pressure commutation circuit exists initial and switches two kinds of location statuss:
When low pressure switching unit is positioned at initial condition, main switch group is closure state, and auxiliary switch group is off state, and sensitiveness load is powered by main power source;
When sensitiveness load voltage reduces, current monitoring unit transtation mission circuit low-voltage signal is to control unit, and control unit receives this information and controls the action of respective switch group, and now main switch group disconnects, and auxiliary switch group closes, and low pressure switching unit is positioned at switching state.
Beneficial effect of the present invention is: after employing said structure, the timing monitoring for this place's circuit is realized by the current monitoring unit be arranged in advance on main circuit, once there is circuit rolling electrical phenomena, now this sensitiveness load voltage reduces, current monitoring unit transtation mission circuit low-voltage signal is to control unit, control unit receives this information and controls the action of respective switch group, thus order about the disconnection of main switch group, auxiliary switch group closes, to complete being powered by the conversion of main power source to stand-by power supply of sensitiveness load.Simple and the reliable and stable work of whole circuit structure, can solve at present any quick responsive type load in the industry to shaking the sensitive question of electricity, comprises motor and relay and frequency converter even load, thus fundamentally can solve and shake the various harm that electricity causes.
Accompanying drawing explanation
Fig. 1 is the previous status figure before the action of embodiments of the invention;
The initial "on" position schematic diagram that Fig. 2 is circuit shown in Fig. 1;
Fig. 3 changes rear view for the rolling TURP for circuit shown in Fig. 2.
Embodiment
A kind of low pressure commutation circuit, at least comprise sensitiveness load and for the main power source that supplies the sensitiveness load energy and stand-by power supply, arrange current monitoring unit and the first switches set successively on connecting circuit between described main power source and sensitiveness load, be furnished with second switch group between described sensitiveness load and stand-by power supply, described in compress commutation circuit and also comprise control unit; Described low pressure commutation circuit exists initial and switches two kinds of location statuss:
When low pressure switching unit is positioned at initial condition, main switch group is closure state, and auxiliary switch group is off state, and sensitiveness load is powered by main power source;
When sensitiveness load voltage reduces, current monitoring unit transtation mission circuit low-voltage signal is to control unit, control unit receives this information and controls the action of respective switch group, now main switch group disconnects, auxiliary switch group closes, low pressure switching unit is positioned at switching state, thus completes being powered by the conversion of main power source to stand-by power supply of sensitiveness load.
The actual switching state of the present invention can with reference to shown in figure 1-3, because current monitoring unit can observe circuit conditions in good time, and while circuit voltage changes, get final product the generation of quick decision circuitry rolling electricity and send action command, and reach the object of quick diverter switch group, finally ensure the rapid of overall switching time.The reduction of its switching time, the sensitiveness that any quick responsive type load is electric to rolling in the industry at present can be solved, comprise motor and relay and frequency converter etc., the selection of its switching over parts also may be selected to be such as vortex patern high speed circuit breaker etc., thus ensure that it switches power fast, fundamentally to solve the various harm that rolling electricity causes.
As present invention further optimization scheme: described sensitiveness load is be arranged in parallel motor load 11 on main circuit and inverter load 21, residing for described motor load 11, branch's branch road is the first branch road, and branch's branch road residing for inverter load 21 is the second branch road; Current monitoring unit comprises the first current monitoring unit 12 be positioned on the first branch road and the second current monitoring unit 22 be positioned on the second branch road, and described main switch group comprises the first main switch K1 be positioned on the first branch road and the second main switch K2 be positioned on the second branch road; The motor load branch road that on stand-by power supply, corresponding layout is arranged in parallel and inverter load branch road, described auxiliary switch group comprises the first auxiliary switch K3 be positioned on motor load branch road and the second auxiliary switch K4 be positioned on inverter load branch road, motor load is propped up route stand-by power supply and is directly communicated to motor load 11 place through the first auxiliary switch K3, inverter load props up route stand-by power supply and is directly communicated to inverter load 12 place through the second auxiliary switch K4, and its practical structures can refer to shown in Fig. 2-3.
Consider when reality uses, the present invention designs for the sensitiveness of type load of working continuously, and only switch a responsive type load when its engineer applied is also considered to switch, the operation this solution ensuring sensitive loads is not interrupted as far as possible; But not sensitive loads does not switch, stand-by power supply capacity and contact capacity can correspondingly reduce.Its frequency converter or motor multiple stage can be merged into one group of switching, important sensitive loads also can be considered to use single switching, also namely lift in embodiment as Figure 2-3, arrange as the consistent motor of main power source and inverter load circuit by same on its stand-by power supply, to form corresponding inverter load branch road and motor load branch road, the motor load branch switch K5 that on it, also relative set is as consistent in coaxial main switch group simultaneously and inverter load branch switch K6, now the first main switch K1, first auxiliary switch K3 and motor load branch switch K5, first auxiliary switch K3 respectively forms 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 inverter load switching combining, the remarkable advantage of this mode is, when there is non-sensitive load short circuits in outer net rolling electricity or Intranet and causing rolling electricity, can switch.Fig. 1-3 is its application diagram, and its sensitive loads comprises motor and frequency converter, and each current monitoring unit and switches set are all for being disposed in order successively to its load direction by the power supply direction of respective branch simultaneously.In figure, two dashed rectangle connecting main power source place form motor load 11 and inverter load 21, and two dashed rectangle connecting stand-by power supply (can be other outer network sources of relative main power source during practical application) place form the proportional sensitivity load of motor, inverter load branch road.Assumed initial state is: K1 closes, K2 closes, K3 opens, K4 opens, and K5 closes, and K6 closes, namely motor load 11 place motor is powered from main power source by the first main switch K1, inverter load 21 place frequency converter is powered from main power source by the second main switch K2, and the motor in motor load branch road is powered from stand-by power supply by motor load branch switch K5, and the frequency converter in inverter load branch road is powered from stand-by power supply by inverter load branch switch K6.When main circuit voltage reduces, flowing through K1 electric current is zero, the electric current flowing through K2 increases, control unit is judged as that main power source shakes non-sensitive load short circuits in electric fault or this low voltage electric network (as shown in Figure 1 a point place be short-circuited phenomenon), now control unit sends out switching command: K1, K2 separating brake, K3, K4 close a floodgate, with this complete corresponding inverter load 21 and motor load 11 by the switching object of main power source to stand-by power supply.
Consider the big current operational environment residing for current monitoring unit, for effective monitoring effect of circuital current during for ensureing its work, described current monitoring unit is Luo-coil type instrument transformer.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (3)
1. a low pressure commutation circuit, it is characterized in that: at least comprise sensitiveness load and for the main power source that supplies the sensitiveness load energy and stand-by power supply, arrange current monitoring unit and main switch group successively on connecting circuit between described main power source and sensitiveness load, be furnished with auxiliary switch group between described sensitiveness load and stand-by power supply, described low pressure commutation circuit also comprises control unit, described sensitiveness load is be arranged in parallel motor load (11) on main circuit and inverter load (21), described motor load (11) residing branch branch road is the first branch road, and inverter load (21) residing branch branch road is the second branch road, current monitoring unit comprises the first current monitoring unit (12) be positioned on the first branch road and the second current monitoring unit (22) be positioned on the second branch road, and described main switch group comprises the first main switch K1 be positioned on the first branch road and the second main switch K2 be positioned on the second branch road, stand-by power supply is arranged equally as the consistent motor of main power source and inverter load circuit, to form the motor load branch road and inverter load branch road that are arranged in parallel accordingly, described auxiliary switch group comprises the first auxiliary switch K3 be positioned on motor load branch road and the second auxiliary switch K4 be positioned on inverter load branch road, described motor load branch road is provided with motor load branch switch K5, described inverter load branch road is provided with inverter load branch switch K6, first main switch K1, first auxiliary switch K3 and motor load branch switch K5, first auxiliary switch K3 respectively forms 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 inverter load switching combining,
Described low pressure commutation circuit exists initial and switches two kinds of location statuss:
When described low pressure commutation circuit is positioned at initial condition, first main switch K1 described in described main switch group and described second main switch K2 is closure state, described first auxiliary switch K3 in auxiliary switch group and described second auxiliary switch K4 is off state, motor load branch switch K5 is closure state, inverter load branch switch K6 is closure state, described motor load (11) in described sensitiveness load is powered from described main power source by described first main switch K1, described inverter load (21) is powered from described main power source by described second main switch K2, motor in described motor load branch road is powered from stand-by power supply by motor load branch switch K5, frequency converter in described inverter load branch road is powered from stand-by power supply by inverter load branch switch K6,
When the sensitiveness load voltage on main circuit reduces, described first current monitoring unit (12) in described current monitoring unit and described second current monitoring unit (22) transtation mission circuit low-voltage signal are to described control unit, described control unit receives information and controls the action of respective switch group, now the first main switch K1 described in main switch group and described second main switch K2 disconnects, described first auxiliary switch K3 in auxiliary switch group and described second auxiliary switch K4 closes, low pressure commutation circuit is positioned at switching state, described motor load (11) in described sensitiveness load is powered from described stand-by power supply by described first auxiliary switch K3, described inverter load (21) is powered from described stand-by power supply by described second auxiliary switch K4.
2. low pressure commutation circuit according to claim 1, is characterized in that: described current monitoring unit and switches set are all for being disposed in order successively to its load direction by the power supply direction of respective branch.
3. low pressure commutation circuit according to claim 2, is characterized in that: described current monitoring unit is Luo-coil type instrument 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210436607.5A CN102916482B (en) | 2012-11-05 | 2012-11-05 | A kind of low pressure commutation circuit |
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| CN102916482A CN102916482A (en) | 2013-02-06 |
| CN102916482B true CN102916482B (en) | 2015-08-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104022565B (en) * | 2013-02-28 | 2016-03-02 | 华为技术有限公司 | A kind of power distribution equipment and method |
| 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 |
| 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 |
Citations (3)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010092580A1 (en) * | 2009-02-16 | 2010-08-19 | Flywheel Energy Ltd. | Accurate frequency regulation for uninterruptible electric power supply |
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Patent Citations (3)
| 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 |
| 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 |
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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. |
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