CN104377804A - Control system of PLC controllable dual-power switch - Google Patents
Control system of PLC controllable dual-power switch Download PDFInfo
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- CN104377804A CN104377804A CN201410539602.4A CN201410539602A CN104377804A CN 104377804 A CN104377804 A CN 104377804A CN 201410539602 A CN201410539602 A CN 201410539602A CN 104377804 A CN104377804 A CN 104377804A
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- 238000001514 detection method Methods 0.000 claims abstract description 61
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 230000005693 optoelectronics Effects 0.000 claims description 30
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
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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 control system of a PLC controllable dual-power switch. The control system comprises a power network source, a photovoltaic conversion power source, a PLC phase loss detection module, an overvoltage and undervoltage detection module and a load. The output end of the power network source and the output end of the photovoltaic conversion power source are connected with the input end of the PLC phase loss detection module, and the output end of the PLC phase loss detection module is electrically connected with the overvoltage and undervoltage detection module and the load. Phase loss and overvoltage and undervoltage detection can be carried out on the power sources, the faulted power source can be switched away in time, the reverse switching function is achieved, when the main power source restores to be normal, the power supply state of the main power source can be switched in time, safety and reliability are achieved, and use is convenient.
Description
Technical field:
The present invention relates to charging device technical field, relate to a kind of control system of controlled twin-power switch in particular.
Background technology:
Twin-power switch on existing market controls to be mainly used in three-phase alternating current and controls for distribution.This kind of electrical source exchange controls most employing relay logical control circuit realiration, and feature is that input power is provided with main power source and stand-by power supply, and described main power source and stand-by power supply are powered to load.During normal work, main power source is powered to load, and when main power source breaks down, control system energy fast shut-off main power source, connects stand-by power supply.But prior art has following defect: (1) is without default-phase protection function.When there is arbitrary phase or two-phase phase shortage, because control system does not have pile defection and protection switching measure, cause the trouble power of phase shortage not cut off, normal power supply power supply can not drop in time, can cause the long-time phase-deficient operation of load like this, cause serious consequence; (2), when trouble power recovers normal, system can not oppositely switch automatically, and manual operation be leaned on oppositely to be switched to normal operating conditions.Therefore, improved for problems of the prior art.
Summary of the invention:
Object of the present invention is exactly the deficiency for prior art, and a kind of PLC control system of controlled twin-power switch is provided, it can realize power phase shortage, overvoltage and under-voltage detection, the out of order power supply of tool can be switched in time, and possess reverse handoff functionality, main power source power supply state can be switched in time when main power source recovers normal, safe and reliable, easy to use.
Technology solution of the present invention is as follows:
The control system of the controlled twin-power switch of a kind of PLC, comprise electric network source, opto-electronic conversion power supply, PLC open phase detection module, overvoltage and under-voltage detection module and load, the output of described electric network source and opto-electronic conversion power supply is connected to the input of PLC open phase detection module, the output of described PLC open phase detection module is electrically connected with overvoltage and under-voltage detection module and load, wherein, described electric network source or opto-electronic conversion power supply are as the input detection signal of PLC open phase detection module, described PLC open phase detection module carries out pile defection to described input detection signal, overvoltage is inputed to and under-voltage detection module carries out the overvoltage in three-phase loop and under-voltage detection by detecting the voltage signal without phase shortage that obtains, after the overvoltage in three-phase loop and under-voltage detection, described electric network source or opto-electronic conversion power supply and load are connected.
Preferred as technique scheme, described electric network source is the main power source of control system, and described opto-electronic conversion power supply is the stand-by power supply of control system, described electric network source there is phase shortage or under-voltage time, start opto-electronic conversion power supply, electric network source disconnects automatically simultaneously.
Preferred as technique scheme, the model of described overvoltage and under-voltage detection module is preferably FX2N-4A/D.
Beneficial effect of the present invention is: by arranging PLC open phase detection module and overvoltage and under-voltage detection module in switching system, can detect the phase shortage of power supply, under-voltage and overvoltage, effectively can solve the problem that trouble power can not cut off, normal power supply power supply can not drop in time because phase shortage causes, also possesses reverse handoff functionality simultaneously, main power source power supply state can be switched in time when main power source recovers normal, safe and reliable, easy to use.
Accompanying drawing illustrates:
Fig. 1 is general structure block diagram of the present invention;
Fig. 2 is the measure loop figure of electric network source of the present invention;
Fig. 3 is the measure loop figure of opto-electronic conversion power supply of the present invention;
Fig. 4 is overvoltage of the present invention and under-voltage measure loop figure.
In figure, 10, electric network source; 20, opto-electronic conversion power supply; 30, PLC open phase detection module; 40, overvoltage and under-voltage detection module; 50, load.
Embodiment:
Embodiment: by particular specific embodiment, embodiments of the present invention are described below, those skilled in the art can understand other advantages of the present invention and effect easily by content disclosed in the present specification.
As shown in Figure 1, the control system of the controlled twin-power switch of a kind of PLC, comprises electric network source 10, opto-electronic conversion power supply 20, PLC open phase detection module 30, overvoltage and under-voltage detection module 40 and load 50.The output of described electric network source 10 and opto-electronic conversion power supply 20 is connected to the input of PLC open phase detection module 30, the output of described PLC open phase detection module 30 is electrically connected with overvoltage and under-voltage detection module 40 and load 50, wherein, described electric network source 10 or opto-electronic conversion power supply 20 are as the input detection signal of PLC open phase detection module 30, described PLC open phase detection module 30 carries out pile defection to described input detection signal, overvoltage is inputed to and under-voltage detection module 40 carries out the overvoltage in three-phase loop and under-voltage detection by detecting the voltage signal without phase shortage that obtains, after the overvoltage in three-phase loop and under-voltage detection, described electric network source 10 or opto-electronic conversion power supply 20 are connected with load 50.
Described electric network source 10 is the main power source of control system, and described opto-electronic conversion power supply 20 is the stand-by power supply of control system, described electric network source 10 there is phase shortage or under-voltage time, start opto-electronic conversion power supply 20, electric network source 10 disconnects automatically simultaneously.The model of described overvoltage and under-voltage detection module 40 is preferably FX2N-4A/D.
Shown in Fig. 2 is the measure loop of electric network source 10, wherein KA1, KA2, KA3, respectively as the three-phase detection of electric network source 10, has and works as KA1, KA2, KA3 simultaneously electric time without any phase phase shortage time, the KM3 coil in Fig. 4 just can be driven to close, after KM3 coil is closed, just can carry out the three-phase overvoltage of electric network source 10 and under-voltage detection.When the overvoltage of three-phase and under-voltage detection module FX2N-4A/D detect that voltage is in setting range, drive KA4, contact KA4 is closed, now the state display lamp HL1 of electric network source 10 is bright, illustrate that now electric network source 10 is in good condition, drive KA5 coil simultaneously, make contact KA5 is closed, allow the use of electric network source 10.When then KA5 closes, KM1 is obtained electric, load 50 and electric network source 10 are connected.Secondly, the three-phase detection loop in normally-closed contact KA5 and the Fig. 3 in electric network source 10 measure loop in opto-electronic conversion power supply 20 measure loop is connected.Object is; if electric network source 10 is in good condition; so normally-closed contact KA5 can obtain electric disconnection; in three-phase detection loop simultaneously in opto-electronic conversion power supply 20 measure loop; also can due to the effect of KA5; the input can not carrying out opto-electronic conversion power supply 20 detects, and avoids the malfunction of stand-by power supply, thus realizes the interlock protection effect of control system.
Shown in Fig. 3 is the measure loop of opto-electronic conversion power supply 20, wherein KA6, KA7, KA8, respectively as the three-phase detection of opto-electronic conversion power supply 20, has and works as KA6, KA7, KA8 coil simultaneously electric time without any phase phase shortage, the KM4 coil in Fig. 4 just can be driven to close, after KM4 coil is closed, just can carry out the under-voltage detection of three-phase of opto-electronic conversion power supply 20.When the overvoltage of three-phase and under-voltage detection module FX2N-4A/D detect that voltage is in setting range, drive KA9 that contact KA9 is closed, now the state display lamp HL2 of opto-electronic conversion power supply 20 is bright, illustrate that now opto-electronic conversion power supply 20 is in good condition, drive KA10 coil simultaneously, contact dynamic circuit connector KA10 is closed, allows the use of opto-electronic conversion power supply 20.
Three-phase lack phase detection signal loop is provided with in Fig. 2 and Fig. 3, this three-phase lack phase detection signal loop is directly taken from the major loop of three phase mains, namely be connected to the U phase of electric network source 10 and opto-electronic conversion power supply 20, V phase respectively with in the single-phase loop of W phase with auxiliary relay, auxiliary relay normally opened contact is respectively as the input signal of PLC.Secondly, utilize overvoltage and under-voltage detection module 40, realize detecting the under-voltage of power supply and overvoltage.
Described embodiment in order to illustrative the present invention, but not for limiting the present invention.Any those skilled in the art all without prejudice under spirit of the present invention and category, can modify to described embodiment, therefore the scope of the present invention, should listed by claim of the present invention.
Claims (3)
1. the control system of the controlled twin-power switch of PLC, it is characterized in that: comprise electric network source (10), opto-electronic conversion power supply (20), PLC open phase detection module (30), overvoltage and under-voltage detection module (40) and load (50), the output of described electric network source (10) and opto-electronic conversion power supply (20) is connected to the input of PLC open phase detection module (30), the output of described PLC open phase detection module (30) is electrically connected with overvoltage and under-voltage detection module (40) and load (50), wherein, described electric network source (10) or opto-electronic conversion power supply (20) are as the input detection signal of PLC open phase detection module (30), described PLC open phase detection module (30) carries out pile defection to described input detection signal, overvoltage is inputed to and under-voltage detection module (40) carries out the overvoltage in three-phase loop and under-voltage detection by detecting the voltage signal without phase shortage that obtains, after the overvoltage in three-phase loop and under-voltage detection, described electric network source (10) or opto-electronic conversion power supply (20) are connected with load (50).
2. the control system of the controlled twin-power switch of a kind of PLC according to claim 1, it is characterized in that: the main power source that described electric network source (10) is control system, the stand-by power supply that described opto-electronic conversion power supply (20) is control system, described electric network source (10) there is phase shortage or under-voltage time, start opto-electronic conversion power supply (20), electric network source (10) disconnects automatically simultaneously.
3. the control system of the controlled twin-power switch of a kind of PLC according to claim 1, is characterized in that: the model of described overvoltage and under-voltage detection module (40) is preferably FX2N-4A/D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410539602.4A CN104377804A (en) | 2014-10-14 | 2014-10-14 | Control system of PLC controllable dual-power switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410539602.4A CN104377804A (en) | 2014-10-14 | 2014-10-14 | Control system of PLC controllable dual-power switch |
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| CN104377804A true CN104377804A (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410539602.4A Pending CN104377804A (en) | 2014-10-14 | 2014-10-14 | Control system of PLC controllable dual-power switch |
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| CN (1) | CN104377804A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914869A (en) * | 2016-05-30 | 2016-08-31 | 鹿寨县众盛商贸有限公司 | Control system of controllable double-power-source switch based on PLC |
| CN106787151A (en) * | 2017-02-15 | 2017-05-31 | 河海大学 | A kind of control method of the controllable twin-power switch of PLC |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201781316U (en) * | 2010-04-29 | 2011-03-30 | 杭州德赢科技有限公司 | Dual power automatic switching system |
| CN103501043A (en) * | 2013-10-14 | 2014-01-08 | 南京欧格节能科技有限公司 | Low-voltage dual-power circuit based on PLC (Programmable Logic Controller) |
-
2014
- 2014-10-14 CN CN201410539602.4A patent/CN104377804A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201781316U (en) * | 2010-04-29 | 2011-03-30 | 杭州德赢科技有限公司 | Dual power automatic switching system |
| CN103501043A (en) * | 2013-10-14 | 2014-01-08 | 南京欧格节能科技有限公司 | Low-voltage dual-power circuit based on PLC (Programmable Logic Controller) |
Non-Patent Citations (1)
| Title |
|---|
| 陈军统等: "基于PLC低压双电源智能开关设计", 《制造业自动化》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914869A (en) * | 2016-05-30 | 2016-08-31 | 鹿寨县众盛商贸有限公司 | Control system of controllable double-power-source switch based on PLC |
| CN106787151A (en) * | 2017-02-15 | 2017-05-31 | 河海大学 | A kind of control method of the controllable twin-power switch of PLC |
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Application publication date: 20150225 |
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