CN109167427B - Power supply system - Google Patents
Power supply system Download PDFInfo
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- CN109167427B CN109167427B CN201810987388.7A CN201810987388A CN109167427B CN 109167427 B CN109167427 B CN 109167427B CN 201810987388 A CN201810987388 A CN 201810987388A CN 109167427 B CN109167427 B CN 109167427B
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- contactor
- power supply
- terminal
- state detection
- normally open
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses a power supply system, and belongs to the field of electrical control. The power supply system comprises a first alternating current power supply, a second alternating current power supply, an uninterruptible power supply, a first contactor, a second contactor, a first power state detection relay and a second power state detection relay, wherein a normally open contact of the first contactor is connected in series with a circuit between the output end of the uninterruptible power supply and an electric load, a coil end of the first contactor and the normally open contact of the first power state detection relay are connected in series, and the coil end of the first power state detection relay is electrically connected with the uninterruptible power supply; the normally open contact of the second contactor is connected in series on a circuit between the second alternating current power supply and the input end of the electric load, and the coil end of the second contactor, the normally closed contact of the first power state detection relay and the normally open contact of the second power state detection relay are connected in series. The invention can ensure continuous power supply to the electric load.
Description
Technical Field
The invention belongs to the field of electrical control, and particularly relates to a power supply system.
Background
A power supply system is a device for supplying electrical energy to an electrical load. For large-scale electric loads, such as large-scale equipment, it is necessary to ensure that the electric loads can continuously and normally operate, so that high requirements are imposed on the reliability and continuous power supply capability of a power supply system.
However, since the ac mains power is uncontrollable, if the equipment is powered by only the ac mains power, once a power failure occurs, the equipment will be shut down, resulting in a great economic loss.
Disclosure of Invention
The embodiment of the invention provides a power supply system which can ensure that power is continuously supplied to a power load. The technical scheme is as follows:
the embodiment of the invention provides a power supply system, which comprises a first alternating current power supply, a second alternating current power supply, an uninterruptible power supply, a first contactor, a second contactor, a first power state detection relay and a second power state detection relay, the first alternating current power supply is electrically connected with the input end of the uninterrupted power supply, the output end of the uninterrupted power supply is electrically connected with the input end of the electric load, the normally open contact of the first contactor is connected in series on a circuit between the output end of the uninterruptible power supply and the electric load, the coil end of the first contactor and the normally open contact of the first power state detection relay are connected in series and are connected in parallel on a circuit between the uninterruptible power supply and the normally open contact of the first contactor, and the coil end of the first power state detection relay is electrically connected with the uninterruptible power supply;
the output of second alternating current power supply with the input electricity of power consumption load is connected, the normally open contact of second contactor is established ties the second alternating current power supply with on the circuit between the input of power consumption load, the coil end of second contactor the normally closed contact of first power state detection relay with the normally open contact of second power state detection relay is established ties together and is connected the second alternating current power supply with on the circuit between the normally open contact of second contactor.
In one implementation manner of the present invention, the second contactor further includes a normally closed contact, and the normally closed contact of the second contactor is connected in series between the normally open contact of the first power state detection relay and the coil end of the first contactor.
In another implementation manner of the present invention, the first contactor further includes a normally closed contact, and the normally closed contact of the first contactor is connected in series between the normally open contact of the second power state detection relay and the coil end of the second contactor.
In still another implementation manner of the invention, a mechanical interlocking structure is arranged between the normally open contact of the first contactor and the normally open contact of the second contactor.
In another implementation manner of the present invention, the first ac power source is 380V commercial power.
In another implementation manner of the invention, the coil end of the first contactor is a 380V alternating current coil.
In another implementation manner of the present invention, the second ac power source is 380V commercial power.
In another implementation manner of the invention, the coil end of the second contactor is a 380V alternating current coil.
In yet another implementation of the inventionWherein the output terminal of the UPS comprises U1Terminal, V1Terminal, W1A terminal, the input end of the power load comprises a three-phase terminal, the U1Terminal, said V1Terminal, said W1The wiring terminals are respectively and electrically connected with the three-phase wiring terminals of the electric load, and the coil end of the first contactor and the normally open contact of the first power state detection relay are connected in series and are connected with the V1Terminal and said W1The posts form loops.
In yet another implementation of the present invention, the output terminal of the second ac power source includes U2Terminal, V2Terminal, W2A terminal, the input end of the power load comprises a three-phase terminal, the U2Terminal, said V2Terminal, said W2The binding posts are respectively and electrically connected with the three-phase binding post of the electric load, and the normally closed contact of the first power state detection relay and the normally open contact of the second power state detection relay are connected in series and are connected with the V2Terminal and said W2The posts form loops.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
when the power supply system provided by the embodiment of the invention supplies power to an electric load, the uninterruptible power supply and the first alternating current power supply are used as main power supply, when the uninterruptible power supply works normally, the coil end of the first power state detection relay is electrified, so that the normally open contact of the first power state detection relay is closed, the normally closed contact of the first power state detection relay is disconnected, the coil end of the first contactor is electrified, and the coil end of the second contactor is disconnected, so that the uninterruptible power supply supplies power to the electric load. When the uninterrupted power source breaks down, and the second alternating current power source normally works, the coil end of first power state detection relay cuts off the power supply, the coil end of second power state detection relay gets electric, make the normally open contact disconnection of first power state detection relay, the normally closed contact closure of first power state detection relay, the normally open contact closure of second power state detection relay, thereby make the coil end outage of first contactor, and the coil end of second contactor gets electric, and then realize that second alternating current power source supplies power to the power consumption load.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a circuit diagram of a power supply system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
An embodiment of the present invention provides a power supply system, as shown in fig. 1, the power supply system includes a first ac power source 1, a second ac power source 2, and an uninterruptible power supply 3, first contactor KM1, second contactor KM2, first power state detection relay KA1 and second power state detection relay KA2, first alternating current power supply 1 is connected with uninterrupted power supply 3's input electricity, uninterrupted power supply 3's output is connected with the input electricity of power consumption load 4, first contactor KM 1's normally open contact is established ties on the circuit between uninterrupted power supply 3's output and power consumption load 4, first contactor KM 1's coil end and first power state detection relay KA 1's normally open contact are established ties together and are connected in parallel on the circuit between uninterrupted power supply 3 and first contactor KM 1's normally open contact, first power state detection relay KA 1's coil end is connected with uninterrupted power supply 3 electricity.
The output end of the second alternating-current power supply 2 is electrically connected with the input end of the electric load 4, the normally open contact of the second contactor KM2 is connected in series on a circuit between the second alternating-current power supply 2 and the input end of the electric load 4, and the coil end of the second contactor KM2, the normally closed contact of the first power state detection relay KA1 and the normally open contact of the second power state detection relay KA2 are connected in series and connected on a circuit between the second alternating-current power supply 2 and the normally open contact of the second contactor KM 2.
When the power supply system provided by the embodiment of the invention supplies power to the electric load 4, the uninterruptible power supply 3 and the first alternating current power supply 1 are used as main power supplies, and when the uninterruptible power supply 3 normally works, the coil end of the first power state detection relay KA1 is electrified, so that the normally open contact of the first power state detection relay KA1 is closed, the normally closed contact of the first power state detection relay KA1 is disconnected, so that the coil end of the first contactor KM1 is electrified, and the coil end of the second contactor KM2 is powered off, thereby realizing that the uninterruptible power supply 3 supplies power to the electric load 4. When the uninterruptible power supply 3 breaks down, and the second alternating current power supply 2 normally works, the coil end of the first power state detection relay KA1 is powered off, the coil end of the second power state detection relay KA2 is powered on, so that the normally open contact of the first power state detection relay KA1 is disconnected, the normally closed contact of the first power state detection relay KA1 is closed, the normally open contact of the second power state detection relay KA2 is closed, so that the coil end of the first contactor KM1 is powered off, and the coil end of the second contactor KM2 is powered on, and further the second alternating current power supply 2 is powered on the power load 4.
In the embodiment of the present invention, the second contactor KM2 further includes a normally closed contact, and the normally closed contact of the second contactor KM2 is connected in series between the normally open contact of the first power state detection relay KA1 and the coil terminal of the first contactor KM 1.
In the above implementation manner, when the coil end of the second contactor KM2 gets electricity, the normally closed contact of the second contactor KM2 is opened, so that the coil end of the first contactor KM1 is powered off, and then the uninterrupted power supply 3 and the second alternating current power supply 2 are prevented from supplying power to the power load 4 at the same time, thereby ensuring the power utilization safety.
Specifically, the first contactor KM1 further includes a normally closed contact, and the normally closed contact of the first contactor KM1 is connected in series between the normally open contact of the second power state detection relay KA2 and the coil end of the second contactor KM 2.
In the above implementation manner, when the coil end of the first contactor KM1 gets electricity, the normally closed contact of the first contactor KM1 is opened, so that the coil end of the second contactor KM2 is powered off, and then the uninterrupted power supply 3 and the second alternating current power supply 2 are prevented from supplying power to the power load 4 at the same time, thereby ensuring the power utilization safety.
Through the arrangement of the normally closed contacts of the first contactor KM1 and the second contactor KM2, the electrical interlock between the uninterruptible power supply 3 and the second alternating current power supply 2 is realized, that is, in the same time, only one or one of the uninterruptible power supply 3 and the second alternating current power supply 2 supplies power to the electric load 4.
In the embodiment of the present invention, a mechanical interlock structure 5 is provided between the normally open contact of the first contactor KM1 and the normally open contact of the second contactor KM 2.
In the above implementation manner, the mechanical interlocking structure 5 may be a lever, a fulcrum and a base, the base is provided with a contact of the first contactor KM1 and a contact of the second contactor KM2, the fulcrum is provided on the base, the lever is rotatably mounted on the fulcrum, two ends of the lever are respectively provided with an armature of the first contactor KM1 and an armature of the second contactor KM2, the armature of the first contactor KM1 and the contact of the first contactor KM1 are arranged opposite to each other to form a normally open contact of the first contactor KM1, and the armature of the second contactor KM2 and the contact of the second contactor KM2 are arranged opposite to each other to form a normally open contact of the second contactor KM 2. When the coil ends of the first contactor KM1 and the second contactor KM2 are powered off, the lever is kept in a state of being parallel to the base, and at the moment, the armature of the first contactor KM1 is arranged at a distance from the contact of the first contactor KM1, and the armature of the second contactor KM2 is arranged at a distance from the contact of the second contactor KM 2; when the coil end of the first contactor KM1 is electrified, the armature of the first contactor KM1 is attracted and conducted with the contact of the first contactor KM1, under the action of a lever, the armature of the second contactor KM2 is still arranged at intervals with the contact of the second contactor KM2, when the coil end of the second contactor KM2 is electrified, the armature of the second contactor KM2 is attracted and conducted with the contact of the second contactor KM2, and under the action of the lever, the armature of the first contactor KM1 is still arranged at intervals with the contact of the first contactor KM 1. That is, the mechanical interlock between the ups 3 and the second ac power source 2 is achieved by the mechanical interlock structure 5, i.e., one and only one of the ups 3 and the second ac power source 2 supplies power to the electric load 4 at the same time.
Optionally, the first ac power supply 1 is 380V mains.
Specifically, the coil end of the first contactor KM1 is a 380V ac coil, so that it can be better matched with the first ac power supply 1.
Optionally, the second ac power supply 2 is 380V mains.
Specifically, the coil end of the second contactor KM2 is a 380V ac coil, so that it can be better matched with the second ac power supply 2.
In this embodiment, the output terminal of the ups comprises U1Terminal, V1Terminal, W1The input end of the power load comprises a three-phase terminal, U1Terminal, V1Terminal, W1The terminals are respectively electrically connected with three-phase terminals of the electric load, and the coil end of the first contactor is connected with the normally open contact of the first power state detection relay in series and is connected with the V1Terminal and W1The posts form a loop, so that the circuit design of the power supply system can be simplified.
In this embodiment, the output terminal of the second ac power source includes U2Terminal, V2Terminal, W2The input end of the power load comprises a three-phase terminal, U2Terminal, V2Terminal, W2The binding posts are respectively electrically connected with the three-phase binding posts of the electric load, and the normally closed contact of the first power state detection relay and the normally open contact of the second power state detection relay are connected in series and are connected with the V2Terminal and W2The terminals form a loop, so that the circuit design of the power supply system can be further simplified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A power supply system is characterized in that the power supply system comprises a first alternating current power supply, a second alternating current power supply, an uninterruptible power supply, a first contactor, a second contactor, a first power state detection relay and a second power state detection relay, the first alternating current power supply is electrically connected with the input end of the uninterrupted power supply, the output end of the uninterrupted power supply is electrically connected with the input end of the electric load, the normally open contact of the first contactor is connected in series on a circuit between the output end of the uninterruptible power supply and the electric load, the coil end of the first contactor and the normally open contact of the first power state detection relay are connected in series and are connected in parallel on a circuit between the uninterruptible power supply and the normally open contact of the first contactor, and the coil end of the first power state detection relay is electrically connected with the uninterruptible power supply;
the output end of the second alternating-current power supply is electrically connected with the input end of the electric load, the normally open contact of the second contactor is connected in series on a circuit between the second alternating-current power supply and the input end of the electric load, and the coil end of the second contactor, the normally closed contact of the first power state detection relay and the normally open contact of the second power state detection relay are connected in series and connected on a circuit between the second alternating-current power supply and the normally open contact of the second contactor;
the normally open contact of first contactor with be provided with mechanical interlocking structure between the normally open contact of second contactor, mechanical interlocking structure includes lever, journal angle and base, be provided with on the base the contact of first contactor with the contact of second contactor, the journal angle sets up on the base, the lever is rotationally installed on the journal angle, the both ends of lever are provided with respectively the armature of first contactor with the armature of second contactor, the armature of first contactor with the contact relative arrangement of first contactor constitutes the normally open contact of first contactor, the armature of second contactor with the contact relative arrangement of second contactor constitutes the normally open contact of second contactor.
2. The power supply system of claim 1, wherein the second contactor further comprises a normally closed contact connected in series between the normally open contact of the first power state detection relay and the coil end of the first contactor.
3. The power supply system of claim 1, wherein the first contactor further comprises a normally closed contact connected in series between the normally open contact of the second power state detection relay and the coil terminal of the second contactor.
4. The power supply system of claim 1, wherein the first ac power source is 380V mains.
5. The power supply system of claim 4, wherein the coil end of the first contactor is a 380V AC coil.
6. The power supply system of claim 1, wherein the second ac power source is 380V mains.
7. The power supply system of claim 6, wherein the coil end of the second contactor is a 380V AC coil.
8. The power supply system of claim 1, wherein the output of the uninterruptible power supply comprises U1Terminal, V1Terminal, W1A terminal, the input end of the power load comprises a three-phase terminal, the U1Terminal, said V1Terminal, said W1Terminals are electrically connected to three-phase terminals of the power load, and a coil terminal of the first contactor and a normal terminal of the first power state detection relayThe open contacts are connected in series with the V1Terminal and said W1The posts form loops.
9. The power supply system of claim 1, wherein the output of the second ac power source comprises U2Terminal, V2Terminal, W2A terminal, the input end of the power load comprises a three-phase terminal, the U2Terminal, said V2Terminal, said W2The binding posts are respectively and electrically connected with the three-phase binding post of the electric load, and the normally closed contact of the first power state detection relay and the normally open contact of the second power state detection relay are connected in series and are connected with the V2Terminal and said W2The posts form loops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810987388.7A CN109167427B (en) | 2018-08-28 | 2018-08-28 | Power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810987388.7A CN109167427B (en) | 2018-08-28 | 2018-08-28 | Power supply system |
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| Publication Number | Publication Date |
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| CN109167427A CN109167427A (en) | 2019-01-08 |
| CN109167427B true CN109167427B (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810987388.7A Active CN109167427B (en) | 2018-08-28 | 2018-08-28 | Power supply system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586292A (en) * | 2019-01-31 | 2019-04-05 | 中车株洲电力机车有限公司 | A kind of library power supply protection system |
| CN110247472A (en) * | 2019-07-17 | 2019-09-17 | 珠海格力电器股份有限公司 | Power supply unit, method and its equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2003128338A (en) * | 2002-09-13 | 2005-04-10 | Максим Станиславович Лысенко (UA) Лысенко Максим Станиславович (UA) | EMERGENCY START-UP DEVICE (ABP) WITH ELECTROMECHANICAL LOCKING |
| CN101551057A (en) * | 2008-04-02 | 2009-10-07 | 中国航天科技集团公司长征机械厂 | Mechanical attached safety protector for hydraulic compressor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414241A (en) * | 2013-08-21 | 2013-11-27 | 山西汾西机电有限公司 | Automatic switching power supply circuit used in underground coal mine |
| CN204794328U (en) * | 2015-04-28 | 2015-11-18 | 中国华电工程(集团)有限公司 | Three -phase electricity dual supply automatic switching control equipment |
| CN106059053A (en) * | 2016-05-31 | 2016-10-26 | 广州地铁集团有限公司 | Double-power-supply automatic switching device |
| CN106340953A (en) * | 2016-09-30 | 2017-01-18 | 上海华虹宏力半导体制造有限公司 | Dual-supply automatic transfer switch |
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2018
- 2018-08-28 CN CN201810987388.7A patent/CN109167427B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2003128338A (en) * | 2002-09-13 | 2005-04-10 | Максим Станиславович Лысенко (UA) Лысенко Максим Станиславович (UA) | EMERGENCY START-UP DEVICE (ABP) WITH ELECTROMECHANICAL LOCKING |
| CN101551057A (en) * | 2008-04-02 | 2009-10-07 | 中国航天科技集团公司长征机械厂 | Mechanical attached safety protector for hydraulic compressor |
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