CN113991834A - Uninterrupted DC double-power automatic change-over switch device - Google Patents
Uninterrupted DC double-power automatic change-over switch device Download PDFInfo
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- CN113991834A CN113991834A CN202111407014.1A CN202111407014A CN113991834A CN 113991834 A CN113991834 A CN 113991834A CN 202111407014 A CN202111407014 A CN 202111407014A CN 113991834 A CN113991834 A CN 113991834A
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- 230000009977 dual effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 12
- 230000007935 neutral effect Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
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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
- H02J9/061—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 for DC powered loads
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention discloses an uninterrupted direct-current dual-power automatic transfer switch device. The uninterrupted direct-current dual-power-supply automatic change-over switch device comprises a first power supply circuit, a second power supply circuit, a controller and a third power supply circuit. The first power supply line is connected with an electric load and provides a main power supply source for the electric load. The second power supply line is connected with the electric load and provides a standby power supply source for the electric load. The controller is used for controlling the automatic switching of the switches in the first power supply line and the second power supply line. And the third power supply line is connected with an electric load, and when the first power supply line and the second power supply line are both powered off, the storage battery pack supplies electric energy to the electric load through the third power supply line. The embodiment of the invention can realize uninterrupted automatic switching of different direct current power supplies, and is favorable for ensuring the power supply reliability of the direct current power supplies and the power utilization reliability of power utilization loads.
Description
Technical Field
The embodiment of the invention relates to the technical field of automatic control, in particular to an uninterrupted direct-current dual-power automatic transfer switch device.
Background
The direct-current power distribution network has the advantages of environmental protection, energy conservation, high efficiency, safety, reliability, convenience in accessing a distributed power supply or an energy storage device and the like, and is widely popularized and applied in the energy Internet at the present stage. However, for some dc power utilization conditions with high power supply reliability requirements, the existing power utilization terminal still lacks an uninterruptible switch device which can be used for switching different dc power supplies.
Disclosure of Invention
The embodiment of the invention provides an uninterrupted direct-current dual-power-supply automatic transfer switch device, which is used for realizing uninterrupted automatic transfer of different direct-current power supplies and is beneficial to ensuring the power supply reliability of the direct-current power supplies and the power utilization reliability of power utilization loads.
The embodiment of the invention provides an uninterrupted direct current dual-power automatic transfer switch device, which comprises:
the first power supply line is connected with an electric load and provides a main power supply source for the electric load;
the second power supply circuit is connected with the electric load and provides a standby power supply source for the electric load;
a controller for controlling automatic switching of switches in the first and second power supply lines;
the third power supply circuit is connected with the electric load; when the first power supply line and the second power supply line are both powered off, the storage battery pack supplies electric energy to the electric load through the third power supply line.
Optionally, the storage battery pack has an automatic charging and discharging function, and when the first power supply line or the second power supply line is powered on, the storage battery pack is charged; and when the first power supply line and the second power supply line are both powered off, the storage battery pack discharges.
Optionally, the first power supply line includes:
a first power supply terminal which is connected to a main power supply;
a first switch connected in series between the first power supply terminal and the electrical load.
Optionally, the second power supply line includes:
the second power supply end is connected with a standby power supply;
a second switch connected in series between the second power source terminal and the power consuming load.
Optionally, the first switch and the second switch are controlled by the controller and are designed in a linkage manner.
Optionally, the first switch comprises:
the first contact is connected to the live wire of the first power supply circuit;
the second contact is connected to a zero line of the first power supply circuit;
and/or, the second switch comprises:
a third contact connected to a live wire of the second power supply line;
a fourth contact connected to a zero line of the second power supply line.
Optionally, the first power supply line and the second power supply line are connected to the same node;
the device further comprises: a diode connected in series between the node and the consumer load.
Optionally, the nodes comprise a first node and a second node;
the live wire of the first power supply circuit and the second power supply circuit is connected to the first node, and the zero wire of the first power supply circuit and the second power supply circuit is connected to the second node;
wherein the diode is connected in series between the first node and a live line of the electrical load; the second node is directly connected with a zero line of the power load.
Optionally, the method further comprises:
the first mutual inductor is electrically connected with the controller; the first transformer is used for detecting whether the first power supply line is electrified or not and transmitting a first state signal to the controller;
the second mutual inductor is electrically connected with the controller; the second transformer is used for detecting whether electricity exists on the second power supply line or not and transmitting a second state signal to the controller.
Optionally, the method further comprises:
and the fourth power supply circuit is connected with the electric load and provides a standby power supply for the electric load so as to realize power supply of a plurality of paths of direct current power supplies.
According to the technical scheme provided by the embodiment of the invention, when the first power supply circuit is in a normal power supply state, the first power supply circuit provides a main power supply source for the electric load; when the first power supply line is interrupted in power supply due to faults or other reasons, the controller controls the automatic switching of the switches in the first power supply line and the second power supply line, so that the second power supply line provides a standby power supply for the electric load; when the first power supply line recovers electricity, the controller controls the switches in the first power supply line and the second power supply line again to execute automatic switching, so that the first power supply line continues to provide a main power supply source for the electricity load; when the first power supply line and the second power supply line are both powered off or the controller controls the switches in the first power supply line and the second power supply line to execute automatic switching, the storage battery pack supplies electric energy to the electric load through the third power supply line. Therefore, the embodiment of the invention can realize uninterrupted automatic switching of different direct current power supplies, and is beneficial to ensuring the power supply reliability of the direct current power supplies and the power utilization reliability of power utilization loads.
Drawings
Fig. 1 is a schematic structural diagram of an uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another uninterruptible direct-current dual-power automatic transfer switching device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention;
fig. 4 is a diagram of an operation process of an uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention;
fig. 5 is a diagram of another uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention;
fig. 6 is a diagram of an operation process of another uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention;
fig. 7 is a diagram of an operation process of another uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention;
fig. 8 is a diagram of an operation process of another uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of an uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention. Referring to fig. 1, the uninterruptible direct current dual power automatic transfer switching device includes a first power supply line 130, a second power supply line 140, a controller 160, and a third power supply line 170.
The first power supply line 130 is connected to an electric load 150, and supplies the main power supply 110 to the electric load 150. The second power supply line 140 is connected to an electric load 150, and supplies the backup power supply 120 to the electric load 150. The controller 160 is used to control the automatic switching of the switches in the first power supply line 130 and the second power supply line 140. The third power supply line 170 is connected to the electrical load 150, and when both the first power supply line 130 and the second power supply line 140 are powered off, the battery pack 180 supplies electrical energy to the electrical load 150 through the third power supply line 170.
The first power supply line 130 is connected between the main power supply 110 and the electrical load 150, the second power supply line 140 is connected between the auxiliary power supply 120 and the electrical load 150, and the third power supply line 170 is connected between the battery pack 180 and the electrical load 150.
It should be noted that the main power supply 110 and the auxiliary power supply 120 are both dc power supplies, and the electrical load 150 may be, but not limited to, a Digital Versatile Disc (DVD) player, a Light Emitting Diode (LED) 1 lighting lamp, a refrigerator, an air conditioner, a television, and the like capable of supplying dc power.
In addition, the switches in the first power supply line 130 and the second power supply line 140 may be, but are not limited to, a dc circuit breaker, and the controller 160 may be, but is not limited to, a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a System On Chip (SOC), or the like.
It is understood that the battery pack 180 may be composed of at least one battery. Illustratively, the storage battery used to constitute the battery pack 180 may be, but is not limited to, a lead-acid storage battery, a meranlian storage battery, a lithium iron phosphate storage battery, or the like. Accordingly, battery pack 180 may be formed by connecting a plurality of batteries of a single kind in series, or may be formed by connecting a plurality of batteries of different kinds in series.
For example, the work flow of the uninterrupted dc dual-power automatic transfer switching device provided by the embodiment of the present invention may be as follows:
when the first power supply line 130 is in a normal power supply state, the primary power supply source 110 supplies power to the electrical load 150 through the first power supply line 130. When the first power supply line 130 interrupts power supply due to a fault or other reasons, the controller 160 recognizes that the first power supply line 130 interrupts power supply, and adaptively controls the switches in the first power supply line 130 and the second power supply line 140 to perform an automatic switching operation. Specifically, the first power supply line 130 is disconnected and then the second power supply line 140 is connected, so that the standby power supply 120 supplies electric energy to the electric load 150 through the second power supply line 140. When the first power supply line 130 recovers power, the controller 160 recognizes that the first power supply line 130 recovers power, and then controls the switches in the first power supply line 130 and the second power supply line 140 to perform automatic switching operation again, that is, the second power supply line 140 is cut off and then the first power supply line 130 is connected, so that the main power supply 110 continues to supply power to the power load 150 through the first power supply line 130.
It is understood that when the first power supply line 130 interrupts power supply, the second power supply line 140 also has a possibility of interruption of power supply; meanwhile, when the controller 160 controls the switches in the first power supply line 130 and the second power supply line 140 to perform the automatic switching operation, the first power supply line 130 needs to be connected after the second power supply line 140 is cut off, or the second power supply line 140 needs to be connected after the first power supply line 130 is cut off, so that the first power supply line 130 and the second power supply line 140 are both powered off in the process of performing the automatic switching operation by the switches in the first and second power supply lines 140. Based on this, in order to maintain the normal operation of the electrical load 150 under the above-mentioned situation, the embodiment of the present invention provides the electrical load 150 with the electrical energy through the third power supply line 170 by setting the battery pack 180, that is, when the first power supply line 130 and the second power supply line 140 are both powered off or the controller 160 controls the switches in the first power supply line 130 and the second power supply line 140 to perform automatic switching, the battery pack 180 provides the electrical energy to the electrical load 150 through the third power supply line 170.
In summary, the embodiment of the present invention can realize uninterrupted automatic switching of different dc power supplies, and is beneficial to ensuring the power supply reliability of the dc power supply and the power utilization reliability of the power utilization load 150.
On the basis of the foregoing embodiments, fig. 2 is a schematic structural diagram of another uninterruptible direct-current dual-power automatic transfer switching device provided in the embodiments of the present invention. Referring to fig. 2, optionally, the first power supply line 130 includes a first power supply terminal and a first switch K1. The first power supply terminal is connected to the main power supply 110. The first switch K1 is connected in series between the first power supply terminal and the consumer load 150.
Alternatively, the second power supply line 140 includes a second power supply terminal and a second switch K2. The second power supply terminal is connected to a backup power supply 120. The second switch K2 is connected in series between the second power supply terminal and the consumer load 150.
Optionally, the first switch K1 and the second switch K2 are both controlled by the controller 160 and are designed in a coordinated manner.
The design of linkage between the first switch K1 and the second switch K2 means that the controller 160 can only control the first switch K1 or the second switch K2 to perform switching-off or switching-on operations at the same time point when the first switch K1 and the second switch K2 perform automatic switching operations. For example, when the first switch K1 needs to be closed, the controller 160 needs to control the second switch K2 to open and then control the first switch K1 to close; when the second switch K2 needs to be closed, the controller 160 needs to control the first switch K1 to open and then control the second switch K2 to close.
It is understood that the reason for this is that when the controller 160 simultaneously controls the first switch K1 to open and the second switch K2 to close, if the second switch K2 completes the closing operation under the condition that the first switch K1 is not opened, the main power supply 110 will communicate with the auxiliary power supply 120, which may cause crosstalk damage between the main power supply 110 and the auxiliary power supply 120. Therefore, the embodiment of the invention can ensure the working safety of the direct current power supply on the basis of realizing the uninterrupted automatic switching of different direct current power supplies and ensuring the reliable working of the direct current power supply and the electric load 150.
Alternatively, the first switch K1 includes a first contact connected to the live wire of the first power supply line 130 and a second contact connected to the neutral wire of the first power supply line 130; and/or the second switch K2 includes a third contact connected to the live line of the second power supply line 140 and a fourth contact connected to the neutral line of the second power supply line 140.
The first power source terminal may be divided into a positive terminal and a negative terminal. It is noted that the positive terminal of the first power supply terminal is electrically connected to the positive electrode of the primary power supply source 110, and the negative terminal of the first power supply terminal is electrically connected to the negative electrode of the primary power supply source 110. The first contact is connected in series between the positive terminal of the first power supply terminal and the positive electrode of the electric load 150, and the second contact is connected in series between the negative terminal of the first power supply terminal and the negative electrode of the electric load 150.
The second power supply terminal may also be divided into a positive terminal and a negative terminal, as appropriate. It is noted that the positive terminal of the second power supply terminal is electrically connected to the positive electrode of the secondary power supply source 120, and the negative terminal of the second power supply terminal is electrically connected to the negative electrode of the secondary power supply source 120. Further, the third contact is connected in series between the positive terminal of the second power supply terminal and the positive electrode of the electric load 150, and the fourth contact is connected in series between the negative terminal of the second power supply terminal and the negative electrode of the electric load 150.
It will be appreciated that when the first switch K1 is opened, the first and second contacts will open simultaneously; when the first switch K1 is closed, the first contact and the second contact will be closed simultaneously; when the second switch K2 opens, the third contact and the fourth contact will open simultaneously; when the second switch K2 is closed, the third contact and the fourth contact will be closed simultaneously.
Alternatively, the first power supply line 130 and the second power supply line 140 are connected to the same node.
Optionally, the nodes comprise a first node and a second node. The live wires of the first and second power supply wires 130 and 140 are connected to a first node, and the neutral wires of the first and second power supply wires 130 and 140 are connected to a second node.
The live wire of the first power supply circuit 130 includes a positive end of the first power supply terminal, a first contact and a positive electrode of the electric load 150, the live wire of the second power supply circuit 140 includes a positive end of the second power supply terminal, a third contact and a positive electrode of the electric load 150, the neutral wire of the first power supply circuit 130 includes a negative end of the first power supply terminal, a second contact and a negative electrode of the electric load 150, and the neutral wire of the second power supply circuit 140 includes a negative end of the second power supply terminal, a fourth contact and a negative electrode of the electric load 150.
Optionally, the storage battery pack 180 has an automatic charging and discharging function, and when the first power supply line 130 or the second power supply line 140 is powered, the storage battery pack 180 is charged; when both the first power supply line 130 and the second power supply line 140 are de-energized, the battery pack 180 discharges.
In summary, the operation flow of the uninterrupted dc dual-power automatic transfer switching device provided by the embodiment of the present invention may be as follows:
when the first power supply line 130 is in a normal power supply state, the electric energy flows from the positive electrode of the primary power supply 110 to the positive electrode of the electric load 150 through the positive terminal of the first power supply terminal and the first contact, and further flows from the negative electrode of the electric load 150 to the negative electrode of the primary power supply 110 through the second contact and the negative terminal of the first power supply terminal, so that the first power supply line 130 can normally supply power to the electric load 150. At this time, battery pack 180 is in a charged state.
When the first power supply line 130 is interrupted in power supply due to a fault or other reasons, the controller 160 recognizes that the first power supply line 130 is interrupted in power supply, and then controls the first contact and the second contact to be opened, and then controls the third contact and the fourth contact to be closed. When the first contact and the second contact are disconnected, the battery pack 180 enters a discharge state and supplies electric power to the electric load 150 through the third power supply line 170. When the third contact and the fourth contact are closed, the electric energy flows from the positive electrode of the backup power supply 120 to the positive electrode of the electric load 150 through the positive terminal of the second power supply terminal and the third contact, and further flows from the negative electrode of the electric load 150 to the negative electrode of the backup power supply 120 through the fourth contact and the negative terminal of the second power supply terminal, so that the backup power supply 120 supplies the electric energy to the electric load 150 through the second power supply line 140. At this time, battery pack 180 enters the charged state again.
When the first power supply line 130 resumes power, the controller 160 recognizes that the first power supply line 130 resumes power supply, and then controls the third contact and the fourth contact to be opened, and then controls the first contact and the second contact to be closed. When the third contact and the fourth contact are disconnected, the battery pack 180 enters the discharge state again, and supplies electric power to the electrical load 150 through the third power supply line 170. When the first contact and the second contact are closed, the electric energy flows from the positive electrode of the primary power supply 110 to the positive electrode of the electric load 150 through the positive terminal of the first power supply terminal and the first contact, and further flows from the negative electrode of the electric load 150 to the negative electrode of the primary power supply 110 through the second contact and the negative terminal of the first power supply terminal, so that the primary power supply 110 supplies the electric energy to the electric load 150 through the first power supply line 130. At this time, battery pack 180 enters the charged state again.
Based on this, the embodiment of the invention can realize uninterrupted automatic switching of different direct current power supplies and ensure reliable work of the direct current power supplies and the electric loads 150, and effectively ensures the work safety of the direct current power supplies by arranging the first switch K1 and the second switch K2 which are in linkage design.
On the basis of the foregoing embodiments, fig. 3 is a schematic structural diagram of another uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention. Referring to fig. 3, optionally, a diode D1 is further included, the diode D1 is connected in series between the node and the electric load 150, the diode D1 is connected in series between the first node and the live wire of the electric load 150, and the second node is directly connected to the neutral wire of the electric load 150.
When the first switch K1 or the second switch K2 is in a closed state, the diode D1 can isolate the voltage of the battery pack 180, prevent the battery pack 180 from adversely affecting the main power supply 110 or the auxiliary power supply 120, and provide a charging path for the battery pack 180.
Optionally, a first transformer M1 and a second transformer M2 are also included. The first transformer M1 is electrically connected to the controller 160, and the first transformer M1 is used to detect whether there is electricity on the first power line 130 and transmit a first status signal to the controller 160. The second transformer M2 is electrically connected to the controller 160, and the second transformer M2 is used to detect whether there is power on the second power supply line 140 and transmit a second status signal to the controller 160.
The first transformer M1 and the second transformer M2 may be, but are not limited to, zero-flux current transformers or electronic current transformers, and the first transformer M1 and the second transformer M2 may both be, but are not limited to, capable of detecting whether there is an electric current on the power supply line by detecting the current flowing in the power supply line.
It is understood that the first status signal and the second status signal may be, but not limited to, digital signals, and the transmission manner of the first status signal and the second status signal may be, but not limited to, wired transmission. Illustratively, the first state signal and the second state signal may be level signals; when the first transformer M1 detects that there is electricity on the first power supply line 130, the first status signal is a high level signal, and when the first transformer M1 does not detect that there is electricity on the first power supply line 130, the first status signal is a low level signal; accordingly, the second status signal is a high level signal when the second transformer M2 detects power on the second power supply line 140, and is a low level signal when the second transformer M2 does not detect power on the second power supply line 140.
In summary, the operation flow of the uninterrupted dc dual-power automatic transfer switching device provided by the embodiment of the present invention may be as follows:
when the first power supply line 130 is in the normal power supply state, the second switch K2 is in the open state, the electric energy flows into the positive electrode of the electric load 150 from the positive electrode of the primary power supply source 110 through the positive terminal of the first power supply end, the first contact and the diode D1, and then flows back to the negative electrode of the primary power supply source 110 from the negative electrode of the electric load 150 through the second contact and the negative terminal of the first power supply end, the first power supply line 130 can normally supply power to the electric load 150, and the storage battery pack 180 is in the charging state. At this time, the working process diagram of the uninterrupted dc dual-power automatic transfer switching device is shown in fig. 4.
When the first power supply line 130 is interrupted in power supply due to a fault or other reasons, the first transformer M1 recognizes that the first power supply line 130 is interrupted in power supply, then adaptively generates a first status signal and transmits the first status signal to the controller 160, and when the second transformer M2 recognizes that the second power supply line 140 is normally supplied in power supply, then adaptively generates a second status signal and transmits the second status signal to the controller 160, and according to the first status signal and the second status signal, the controller 160 firstly controls the first contact and the second contact to be disconnected, and then controls the third contact and the fourth contact to be closed. When the first contact and the second contact are disconnected, the battery pack 180 enters a discharge state and supplies electric power to the electric load 150 through the third power supply line 170. When the third contact and the fourth contact are closed, the electric energy flows from the positive electrode of the backup power supply 120 to the positive electrode of the electric load 150 through the positive terminal of the second power supply terminal, the third contact and the diode D1, and further flows from the negative electrode of the electric load 150 to the negative electrode of the backup power supply 120 through the fourth contact and the negative terminal of the second power supply terminal, so that the backup power supply 120 supplies the electric energy to the electric load 150 through the second power supply line 140, and the battery pack 180 enters the charging state again. In the process, the working process diagram of the uninterrupted direct current dual-power automatic transfer switching device can be shown in fig. 5 and fig. 6.
When the first power supply line 130 is powered back, the first transformer M1 recognizes that the first power supply line 130 can supply power normally, and then adaptively generates and transmits another first status signal to the controller 160. According to the first status signal, the controller 160 controls the third contact and the fourth contact to be opened, and then controls the first contact and the second contact to be closed. When the third contact and the fourth contact are disconnected, the battery pack 180 enters the discharge state again, and supplies electric power to the electrical load 150 through the third power supply line 170. When the first contact and the second contact are closed, the electric energy flows from the positive electrode of the primary power supply 110 through the positive terminal of the first power supply terminal, the first contact and the diode D1 into the positive electrode of the electric load 150, and further flows from the negative electrode of the electric load 150 back to the negative electrode of the primary power supply 110 through the second contact and the negative terminal of the first power supply terminal, so that the primary power supply 110 supplies the electric energy to the electric load 150 through the first power supply line 130, and the battery pack 180 enters the charging state again. In the process, the working process diagram of the uninterrupted direct current dual-power automatic transfer switching device can be shown in fig. 7 and 8.
It is to be understood that in fig. 4 to 8, i is used to indicate the current flow direction of the uninterrupted dc dual-power automatic transfer switching device.
Based on this, the embodiment of the invention can realize uninterrupted automatic switching of different direct current power supplies, and is beneficial to ensuring the power supply reliability of the direct current power supplies and the power utilization reliability of the power utilization load 150.
On the basis of the foregoing embodiments, fig. 9 is a schematic structural diagram of another uninterrupted dc dual-power automatic transfer switching device according to an embodiment of the present invention. Referring to fig. 9, optionally, at least one fourth power supply line is further included, and the fourth power supply line is connected to the electrical load 150 and provides a standby power supply for the electrical load 150, so as to implement multiple dc power supplies.
It is to be understood that, the uninterrupted dual-power-supply automatic transfer switching device shown in fig. 1 exemplarily shows that the number of the standby power supplies is 1, and the uninterrupted dual-power-supply automatic transfer switching device shown in fig. 9 exemplarily shows that the number of the standby power supplies is 2, but not limiting the embodiments of the present invention. In some embodiments, the number of backup power sources may be, but is not limited to, 3, 4, or 5, etc., and adaptively, the number of power supply lines corresponding to the backup power sources may be 3, 4, or 5, etc.
It can be understood that the technical principle and the effect of the uninterrupted dc dual-power automatic transfer switching device shown in fig. 9 are similar to those of the uninterrupted dc dual-power automatic transfer switching device shown in fig. 1, and are not described again.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An uninterrupted DC dual power automatic transfer switch device, comprising:
the first power supply line is connected with an electric load and provides a main power supply source for the electric load;
the second power supply circuit is connected with the electric load and provides a standby power supply source for the electric load;
a controller for controlling automatic switching of switches in the first and second power supply lines;
the third power supply circuit is connected with the electric load; when the first power supply line and the second power supply line are both powered off, the storage battery pack supplies electric energy to the electric load through the third power supply line.
2. The uninterrupted direct-current dual-power-supply automatic transfer switching device according to claim 1, wherein the storage battery pack has an automatic charging and discharging function, and when the first power supply line or the second power supply line is powered, the storage battery pack is charged; and when the first power supply line and the second power supply line are both powered off, the storage battery pack discharges.
3. The uninterruptible direct current dual power automatic transfer switching device of claim 1, wherein the first power supply line comprises:
a first power supply terminal which is connected to a main power supply;
a first switch connected in series between the first power supply terminal and the electrical load.
4. The uninterruptible direct current dual power automatic transfer switching device of claim 3, wherein the second power supply line comprises:
the second power supply end is connected with a standby power supply;
a second switch connected in series between the second power source terminal and the power consuming load.
5. The uninterruptible direct current dual power supply automatic transfer switching device according to claim 4, wherein the first switch and the second switch are controlled by the controller and are designed in a linkage manner.
6. The uninterruptible direct current dual power automatic transfer switching device of claim 4, wherein the first switch comprises:
the first contact is connected to the live wire of the first power supply circuit;
the second contact is connected to a zero line of the first power supply circuit;
and/or, the second switch comprises:
a third contact connected to a live wire of the second power supply line;
a fourth contact connected to a zero line of the second power supply line.
7. The uninterruptible direct current dual-power automatic transfer switching device according to claim 1, wherein the first power supply line and the second power supply line are connected to the same node;
the device further comprises: a diode connected in series between the node and the consumer load.
8. The uninterruptible dual direct current power supply automatic transfer switching device of claim 7, wherein the nodes comprise a first node and a second node;
the live wire of the first power supply circuit and the second power supply circuit is connected to the first node, and the zero wire of the first power supply circuit and the second power supply circuit is connected to the second node;
wherein the diode is connected in series between the first node and a live line of the electrical load; the second node is directly connected with a zero line of the power load.
9. The uninterruptible direct current dual power automatic transfer switching device of claim 1, further comprising:
the first mutual inductor is electrically connected with the controller; the first transformer is used for detecting whether the first power supply line is electrified or not and transmitting a first state signal to the controller;
the second mutual inductor is electrically connected with the controller; the second transformer is used for detecting whether electricity exists on the second power supply line or not and transmitting a second state signal to the controller.
10. The uninterruptible direct current dual power automatic transfer switching device of any one of claims 1 to 9, further comprising:
and the fourth power supply circuit is connected with the electric load and provides a standby power supply for the electric load so as to realize power supply of a plurality of paths of direct current power supplies.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407014.1A CN113991834A (en) | 2021-11-24 | 2021-11-24 | Uninterrupted DC double-power automatic change-over switch device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407014.1A CN113991834A (en) | 2021-11-24 | 2021-11-24 | Uninterrupted DC double-power automatic change-over switch device |
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| CN113991834A true CN113991834A (en) | 2022-01-28 |
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| CN202111407014.1A Pending CN113991834A (en) | 2021-11-24 | 2021-11-24 | Uninterrupted DC double-power automatic change-over switch device |
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| CN111277041A (en) * | 2020-02-09 | 2020-06-12 | 郑州科技学院 | Dual-power automatic transfer switch and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204706942U (en) * | 2015-04-21 | 2015-10-14 | 中广核核电运营有限公司 | Direct current system is electric supply installation and DC suppling equipment again |
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