CN110912253A - Low-voltage intelligent spare power automatic switching system - Google Patents
Low-voltage intelligent spare power automatic switching system Download PDFInfo
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- CN110912253A CN110912253A CN201911167553.5A CN201911167553A CN110912253A CN 110912253 A CN110912253 A CN 110912253A CN 201911167553 A CN201911167553 A CN 201911167553A CN 110912253 A CN110912253 A CN 110912253A
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- 238000012546 transfer Methods 0.000 claims description 19
- 238000011084 recovery Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- 238000010248 power generation Methods 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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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
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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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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The embodiment of the invention discloses a low-voltage intelligent spare power automatic switching system which comprises a low-voltage intelligent spare power automatic switching device used for connecting a power distribution room A and a bus of the power distribution room, wherein the low-voltage intelligent spare power automatic switching device is used for acquiring bus line data in the power distribution room A and the bus line data in the power distribution room B and realizing the automatic switching function of the spare power automatic switching by controlling and connecting switches on all lines through wireless communication. The invention can reduce the load cutting and restore the power supply reliability as soon as possible, divide the load to be cut into a plurality of wheels according to the size of the system load, and cut off in sequence in the overload process to prevent the phenomenon that the transformer is damaged due to overload of the power system.
Description
Technical Field
The embodiment of the invention relates to the technical field of low-voltage spare power automatic switching, in particular to a low-voltage intelligent spare power automatic switching system.
Background
When the demand of power generation and power utilization load of an electric power system is overlarge, a part of secondary loads arranged in the system in advance need to be sequentially cut off according to a preset action load value, so that the load of the system is lightened, the system returns to a normal operation state, a low-voltage intelligent spare power automatic switching device is an automatic device for realizing the measure, and comprises two links of load measurement and load reduction, wherein in order to reduce the cut-off load as much as possible and restore the power supply reliability as soon as possible, the load to be cut off is divided into a plurality of turns according to the size of the system load, and the cut-off load is sequentially cut off in an overload process.
Disclosure of Invention
Therefore, the embodiment of the invention provides a low-voltage intelligent spare power automatic switching system, which is used for solving the problem that the phenomenon that a transformer is damaged by overload of a power system in the prior art is solved.
In order to achieve the above object, an embodiment of the present invention provides the following:
in one aspect of the embodiment of the invention, a low-voltage intelligent backup automatic switching system is provided, which comprises a low-voltage intelligent backup automatic switching device for connecting buses of a power distribution room a and a power distribution room B, wherein the low-voltage intelligent backup automatic switching device is used for acquiring bus line data in the power distribution room a and the power distribution room B and controlling and connecting switches on each line through wireless communication to realize the automatic switching function of backup automatic switching.
As a preferable scheme of the present invention, the low-voltage intelligent backup power automatic switching device is respectively connected to an IA bus of a power distribution room a and an IB bus of the power distribution room in a wireless communication manner, the IA bus is connected to a transformer a, the IB bus is connected to a transformer B, the IA bus is connected to a plurality of feeders a, the IB bus is connected to a plurality of feeders B, and the feeders a and B are connected to the low-voltage intelligent backup power automatic switching device through RS485 communication modules.
As a preferable aspect of the present invention, voltage acquisition modules are provided on the IA bus and the IB bus.
As a preferable scheme of the present invention, a current collection module and a switch a are disposed between the IA bus and the transformer a, a current collection module and a switch B are disposed between the IB bus and the transformer B, and the low-voltage intelligent backup power automatic switching device is in wireless communication connection with the switch a and the switch B.
As a preferable scheme of the present invention, two ends of the transformer a and the transformer B are connected with a voltage collecting module.
As a preferable scheme of the present invention, a current collection module and a switch C are connected between the IA bus and the IB bus, and the low-voltage intelligent backup power automatic switching device is in wireless communication connection with the switch C.
As a preferable scheme of the present invention, the IA bus and the IB bus operate in a segmented manner, when the IA bus is under a voltage loss state or a low-voltage breaker trips to start, and when the IA bus becomes low and fails to cause a transformer trips to start, a load value of the voltage loss IA bus and a load value of an adjacent IA bus are calculated, and the load of the voltage loss IA bus and a capacity threshold of the transformer to be put into are compared to see whether the capacity threshold meets a required load size;
if the sum of the loads of the IA bus is smaller than the capacity threshold value, disconnecting the voltage-loss IA bus, closing a 4000 switch to complete the load backup power automatic switching, and reporting that the bus voltage-loss load backup power automatic switching is successful;
if the sum of the loads of the IA bus is larger than the capacity threshold value, the load is not immediately transferred, and an IA bus voltage loss and load backup power automatic switching failure signal is sent; comparing the load loops, cutting off the load loops in the feeder line of the power distribution room A until the load meets the transformer capacity, and then performing load transfer;
when any 400V feeder line carried by the IA bus has a line fault, the switch A is disconnected;
judging the operation/fault state of each outgoing line loop through a line acquisition unit, and preparing to remove a fault line, or disconnecting an outgoing line switch of the outgoing line loop through the line acquisition unit, or automatically recovering a switch A through a low-voltage intelligent backup automatic switching device;
and after the switch A is recovered, if the switch A trips again, the bus backup power automatic switching is carried out by automatically closing the switch C through the low-voltage intelligent backup power automatic switching device.
As a preferable scheme of the present invention, the IA bus and the IB bus operate in a segmented manner, when the IB bus becomes low and fails to cause a jump start of the transformer, a load value of the voltage-loss IB bus and a load value of an adjacent IB bus are calculated, and a capacity threshold of the voltage-loss IB bus is compared with a capacity threshold of the transformer to be put into operation, to see whether the capacity meets a required load;
if the sum of the load DE of the IB bus is smaller than the capacity threshold value, disconnecting the voltage-loss IB bus, closing the switch C to complete load transfer, and reporting the success of the voltage-loss load transfer of the IB bus;
if the sum of the loads of the IB bus is larger than the capacity threshold value, the load is not immediately transferred, and the IB bus voltage loss and the load backup automatic switching failure signal are sent; comparing the load loops, cutting off the load loop in the feeder line of the power distribution room B until the load meets the transformer capacity, and then performing load transfer;
when any 400V outgoing line carried by the IB bus has line fault, the switch B is switched off;
judging the operation/fault state of each outgoing line loop through a line acquisition unit, preparing for load shedding, switching off the switch B through the line acquisition unit, and performing bus backup automatic switching through the automatic switch C of the low-voltage intelligent backup automatic switching device if the switch B is correspondingly tripped again after the switch B is recovered through the automatic recovery combination switch B of the low-voltage intelligent backup automatic switching device;
and when the bus B fails, the switch C is locked, and the spare power automatic switching function is stopped.
As a preferred aspect of the present invention, the bus line data includes bus voltage, switch position, and real-time current.
As a preferable scheme of the invention, the low-voltage intelligent backup power automatic switching device comprises an automatic breaking incoming switch and a breaking outgoing switch.
The embodiment of the invention has the following advantages:
the invention can reduce the load cutting and restore the power supply reliability as soon as possible, divide the load to be cut into a plurality of wheels according to the size of the system load, and cut off in sequence in the overload process to prevent the phenomenon that the transformer is damaged due to overload of the power system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a schematic diagram of a low-voltage intelligent backup power automatic switching system according to an embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a low-voltage intelligent backup automatic switching system, which includes a low-voltage intelligent backup automatic switching device for connecting a distribution room a and a bus of the distribution room, wherein the low-voltage intelligent backup automatic switching device is used for collecting bus line data in the distribution room a and the distribution room B, the bus line data includes bus voltage, switch position and real-time current, and the backup automatic switching functions such as automatic breaking incoming switch and breaking outgoing switch are realized.
The low-voltage intelligent backup power automatic switching device is respectively in wireless communication connection with an IA bus of a power distribution room A and an IB bus of the power distribution room, the IA bus is connected with an access transformer A, the IB bus is connected with a transformer B, the IA bus is connected with a plurality of feeder lines A, the IB bus is connected with a plurality of feeder lines B, and the feeder lines A and the feeder lines B are connected to the low-voltage intelligent backup power automatic switching device through RS485 communication modules.
Voltage acquisition modules are arranged on the IA bus and the IB bus; a current acquisition module and a switch A are arranged between the IA bus and the transformer A, and a current acquisition module and a switch B are arranged between the IB bus and the transformer B; two ends of the transformer A and the transformer B are connected with a voltage acquisition module; and a current acquisition module and a switch C are connected between the IA bus and the IB bus, and the automatic switching function of the backup power automatic switch is in wireless communication connection with the switch A, the switch B and the switch B.
When the IA bus is in voltage loss or becomes low and a breaker is tripped to start, when the IA bus becomes low and fails to cause the tripping of a transformer, the load value of the voltage loss bus and the load value of the adjacent bus are calculated, the load value of the voltage loss bus is compared with the capacity threshold value of the transformer to be put into, and whether the capacity meets the required load or not is judged;
if the load sum value is smaller than the capacity threshold value, disconnecting the voltage-loss low-voltage breaker, closing a 4000 switch to complete load spare power automatic switching, and reporting that the bus voltage-loss load spare power automatic switching is successful;
if the load sum value is larger than the threshold value of the transfer transformer, the load transfer is not carried out immediately, and XX bus voltage loss and load spare power automatic switching failure signals are sent; comparing the load loops, cutting off unimportant load loops in the feeder line of the power distribution room A until the load meets the transformer capacity, and then carrying out load transfer;
when any 400V feeder line carried by the IA bus has a line fault, a switch A is tripped;
judging the operation/fault state of each outgoing line loop through a line acquisition unit, preparing to reasonably remove a fault line, or switching the outgoing line switch through the line acquisition unit, or automatically recovering the switch A through a low-voltage intelligent spare power automatic switching device;
and after the switch A is recovered, if the switch A trips again, the bus backup power automatic switching is carried out by automatically closing the switch C through the low-voltage intelligent backup power automatic switching device.
And the IA bus and the IB bus operate in a segmented mode, and when the IB bus becomes low and has a fault to cause the jump starting of the transformer, the load value of the voltage-loss bus and the load value of the adjacent bus are calculated. Comparing the load of the voltage-loss bus with the capacity threshold value of the transformer to be put into the transformer to see whether the capacity meets the required load;
if the load sum value is smaller than the capacity threshold value, disconnecting the low-voltage-loss breaker, closing a switch C to complete load transfer, and reporting that the bus voltage-loss load transfer is successful;
if the load sum value is larger than the threshold value of the transfer transformer, the load transfer is not carried out immediately, and XX bus voltage loss and load spare power automatic switching failure signals are sent; comparing the load loops, cutting off unimportant load loops in the feeder line of the power distribution room B until the load meets the transformer capacity, and then carrying out load transfer;
when any 400V outgoing line carried by the IB bus has a line fault, the switch B is tripped;
judging the operation/fault state of each outgoing line loop through a line acquisition unit, preparing for reasonable load shedding, switching off the switch B through the line acquisition unit, automatically recovering the combined switch B through the low-voltage intelligent automatic bus transfer device, and performing bus automatic bus transfer through an automatic switch C of the low-voltage intelligent automatic bus transfer device if the switch B is tripped correspondingly again after recovery;
when the IB bus fails, the switch C is locked, and the spare power automatic switching function is stopped.
The invention can reduce the load to be cut off and recover the power supply reliability as soon as possible, the load to be cut off is divided into a plurality of wheels according to the size of the system load, and the load is cut off in sequence in the overload process, so that the phenomenon that the transformer is damaged due to overload of a power system is prevented.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The low-voltage intelligent backup automatic switching system is characterized by comprising a low-voltage intelligent backup automatic switching device for connecting buses of a power distribution room A and a power distribution room B, wherein the low-voltage intelligent backup automatic switching device is used for acquiring bus line data in the power distribution room A and the power distribution room B and realizing the automatic switching function of backup automatic switching by controlling and connecting switches on all lines through wireless communication.
2. The system according to claim 1, wherein the low-voltage intelligent backup power automatic switching device is connected with an IA bus of a power distribution room a and an IB bus of the power distribution room in a wireless communication manner, respectively, the IA bus is connected to a transformer a, the IB bus is connected to a transformer B, the IA bus is connected to a plurality of feeders a, the IB bus is connected to a plurality of feeders B, and the feeders a and B are connected to the low-voltage intelligent backup power automatic switching device through RS485 communication modules.
3. The low-voltage intelligent backup power automatic switching system according to claim 2, wherein a voltage acquisition module is arranged on the IA bus and the IB bus.
4. The system according to claim 3, wherein a current collection module and a switch A are provided between the IA bus and the transformer A, a current collection module and a switch B are provided between the IB bus and the transformer B, and the low-voltage intelligent backup power automatic switching device is in wireless communication connection with the switch A and the switch B.
5. The low-voltage intelligent backup power automatic switching system according to claim 4, characterized in that voltage collection modules are connected to two ends of the transformer A and the transformer B.
6. The system according to claim 5, wherein a current collection module and a switch C are connected between the IA bus and the IB bus, and the low-voltage intelligent backup power automatic switching device is in wireless communication connection with the switch C.
7. The low-voltage intelligent spare power automatic switching system according to claim 6, wherein the IA bus and the IB bus operate in a segmented mode, when the IA bus is in voltage loss or is in tripping starting of a low-voltage breaker, when the IA bus becomes low and goes wrong to cause tripping starting of a transformer, the load value of the voltage-loss IA bus and the load value of the adjacent IA bus are calculated, the load of the voltage-loss IA bus is compared with the capacity threshold value of the transformer to be switched, and whether the capacity threshold value meets the required load size is judged;
if the sum of the loads of the IA bus is smaller than the capacity threshold value, disconnecting the voltage-loss IA bus, closing a 4000 switch to complete the load backup power automatic switching, and reporting that the bus voltage-loss load backup power automatic switching is successful;
if the sum of the loads of the IA bus is larger than the capacity threshold value, the load is not immediately transferred, and an IA bus voltage loss and load backup power automatic switching failure signal is sent; comparing the load loops, cutting off the load loops in the feeder line of the power distribution room A until the load meets the transformer capacity, and then performing load transfer;
when any 400V feeder line carried by the IA bus has a line fault, the switch A is disconnected;
judging the operation/fault state of each outgoing line loop through a line acquisition unit, and preparing to remove a fault line, or disconnecting an outgoing line switch of the outgoing line loop through the line acquisition unit, or automatically recovering a switch A through a low-voltage intelligent backup automatic switching device;
and after the switch A is recovered, if the switch A trips again, the bus backup power automatic switching is carried out by automatically closing the switch C through the low-voltage intelligent backup power automatic switching device.
8. The low-voltage intelligent backup power automatic switching system according to claim 6, wherein the IA bus and the IB bus operate in a segmented manner, when the IB bus becomes low and fails to cause a transformer to jump and start, the load value of the voltage-loss IB bus load and the adjacent IB bus is calculated, and the voltage-loss IB bus load is compared with the capacity threshold of the transformer to be switched, so as to see whether the capacity meets the required load;
if the sum of the load DE of the IB bus is smaller than the capacity threshold value, disconnecting the voltage-loss IB bus, closing the switch C to complete load transfer, and reporting the success of the voltage-loss load transfer of the IB bus;
if the sum of the loads of the IB bus is larger than the capacity threshold value, the load is not immediately transferred, and the IB bus voltage loss and the load backup automatic switching failure signal are sent; comparing the load loops, cutting off the load loop in the feeder line of the power distribution room B until the load meets the transformer capacity, and then performing load transfer;
when any 400V outgoing line carried by the IB bus has line fault, the switch B is switched off;
judging the operation/fault state of each outgoing line loop through a line acquisition unit, preparing for load shedding, switching off the switch B through the line acquisition unit, and performing bus backup automatic switching through the automatic switch C of the low-voltage intelligent backup automatic switching device if the switch B is correspondingly tripped again after the switch B is recovered through the automatic recovery combination switch B of the low-voltage intelligent backup automatic switching device;
and when the bus B fails, the switch C is locked, and the spare power automatic switching function is stopped.
9. The low-voltage intelligent backup power automatic switching system according to claim 1, wherein the bus line data comprises bus voltage, switch position, and real-time current.
10. The system according to claim 1, wherein the low-voltage intelligent backup power automatic switching device comprises an automatic breaking incoming switch and a breaking outgoing switch.
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| CN201911167553.5A CN110912253B (en) | 2019-11-25 | 2019-11-25 | Low-voltage intelligent spare power automatic switching system |
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| CN201911167553.5A CN110912253B (en) | 2019-11-25 | 2019-11-25 | Low-voltage intelligent spare power automatic switching system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112217201A (en) * | 2020-09-25 | 2021-01-12 | 广东电网有限责任公司 | High-low voltage dual-power-supply dual-loop network power supply system and spare power automatic switching control method |
| CN112713586A (en) * | 2020-12-08 | 2021-04-27 | 广东卡特能源科技有限公司 | Low-voltage intelligent power distribution self-healing and power supply switching control system |
| CN114336947A (en) * | 2022-01-04 | 2022-04-12 | 中国电建集团成都勘测设计研究院有限公司 | Automatic standby power supply switching system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112217201A (en) * | 2020-09-25 | 2021-01-12 | 广东电网有限责任公司 | High-low voltage dual-power-supply dual-loop network power supply system and spare power automatic switching control method |
| CN112217201B (en) * | 2020-09-25 | 2022-07-12 | 广东电网有限责任公司 | High-low voltage dual-power-supply dual-loop network power supply system and spare power automatic switching control method |
| CN112713586A (en) * | 2020-12-08 | 2021-04-27 | 广东卡特能源科技有限公司 | Low-voltage intelligent power distribution self-healing and power supply switching control system |
| CN114336947A (en) * | 2022-01-04 | 2022-04-12 | 中国电建集团成都勘测设计研究院有限公司 | Automatic standby power supply switching system and method |
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