CN110932395A - Low-voltage intelligent spare power automatic switching communication system - Google Patents

Low-voltage intelligent spare power automatic switching communication system Download PDF

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Publication number
CN110932395A
CN110932395A CN201911167425.0A CN201911167425A CN110932395A CN 110932395 A CN110932395 A CN 110932395A CN 201911167425 A CN201911167425 A CN 201911167425A CN 110932395 A CN110932395 A CN 110932395A
Authority
CN
China
Prior art keywords
bus
automatic switching
voltage
low
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911167425.0A
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Chinese (zh)
Inventor
张翔
蔡志文
黄永麟
殷建树
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Power Grid Co Ltd
Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Original Assignee
Guangdong Power Grid Co Ltd
Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Power Grid Co Ltd, Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd filed Critical Guangdong Power Grid Co Ltd
Priority to CN201911167425.0A priority Critical patent/CN110932395A/en
Publication of CN110932395A publication Critical patent/CN110932395A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems 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
    • Y02B70/3225Demand response systems, e.g. load shedding, peak shaving
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Smart grids as enabling technology in buildings sector
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems
    • Y04S20/222Demand response systems, e.g. load shedding, peak shaving
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

Abstract

The embodiment of the invention discloses a communication system of a low-voltage intelligent spare power automatic switching device, which comprises a master station platform for finally receiving and processing data acquired by the low-voltage intelligent spare power automatic switching system, wherein the low-voltage intelligent spare power automatic switching system comprises a low-voltage intelligent spare power automatic switching device which is used for connecting two power distribution room buses and acquiring bus line data of the power distribution room, the low-voltage intelligent spare power automatic switching device is connected with switches on all lines through wireless communication control to realize the automatic switching function of the spare power automatic switching device, the low-voltage intelligent spare power automatic switching device is connected with an intelligent low-voltage monitoring terminal through Ethernet wireless communication, and the intelligent low-voltage monitoring terminal is in wireless communication connection with the master station platform. The embodiment of the invention collects the electrical data such as bus voltage, low voltage, switch position, real-time current and the like of two power distribution rooms through the low-voltage intelligent backup power automatic switching device, and transmits the collected electrical data to the master station platform in real time for analysis and processing through a wireless communication technology.

Description

Low-voltage intelligent spare power automatic switching communication system
Technical Field
The embodiment of the invention relates to the technical field of low-voltage spare power automatic switching, in particular to a communication system of low-voltage intelligent spare power automatic switching.
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, the low-voltage intelligent spare power automatic switching device is an automatic device for realizing the measure, and consists of two links of load measurement and load reduction, and in order to reduce the cut-off load as much as possible and recover 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 load is sequentially cut off in an overload process.
In the prior art, the data of the bus line of the power distribution room can be acquired through the low-voltage intelligent backup power automatic switching device, but the data acquisition is a problem that the data cannot be fed back and analyzed in real time, and a communication mode which can be known in real time and analyzed in real time is lacked.
Disclosure of Invention
Therefore, the embodiment of the invention provides a low-voltage intelligent backup power automatic switching communication system to solve the problem that the transformer is prevented from being damaged due to overload of a power system in the prior art.
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, the communication system of the low-voltage intelligent backup power automatic switching device comprises a master station platform for finally receiving and processing data acquired by the low-voltage intelligent backup power automatic switching device, the low-voltage intelligent backup power automatic switching device further comprises a low-voltage intelligent backup power automatic switching device for connecting two power distribution room buses and acquiring bus line data of the power distribution room, the low-voltage intelligent backup power automatic switching device is connected with switches on all lines through wireless communication control to realize the automatic switching function of the backup power automatic switching device, the low-voltage intelligent backup power automatic switching device is connected with an intelligent low-voltage monitoring terminal through Ethernet wireless communication, and the intelligent low-voltage monitoring terminal is connected with the master station platform through wireless communication.
As a preferable scheme of the invention, the low-voltage intelligent backup power automatic switching device acquires and controls an acquisition unit on a bus line through an RS485 communication module to acquire telemetering and remote signaling signals of each outgoing line loop.
As a preferable scheme of the present invention, the intelligent low-voltage monitoring terminal transmits the data analyzed and processed by the intelligent low-voltage monitoring terminal to the master station platform through a 4G channel or a dedicated optical fiber channel.
As a preferable scheme of the present invention, the two power distribution rooms are respectively marked as a power distribution room a and a power distribution room B, the low-voltage intelligent backup power automatic switching device is respectively connected with an IA bus of the power distribution room a and an IB bus of the power distribution room in a wireless communication manner, the IA bus is connected to an access transformer a, the IB bus is connected to a transformer B, the IA bus is connected to a plurality of feeder lines a, the IB bus is connected to a plurality of feeder lines B, and the feeder lines a and B are connected to the low-voltage intelligent backup power automatic switching device through an RS485 communication module.
As a preferable scheme of the present invention, voltage acquisition modules are disposed 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, a current acquisition module and a switch B are arranged between the IB bus and the transformer B, and the low-voltage intelligent spare power automatic switching device is in wireless communication connection with the switch A and the switch B; and voltage acquisition modules are connected to two ends of the transformer A and the transformer B.
As a preferable scheme of the 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 invention, the IA bus and the IB bus operate in a segmented manner, when the IA bus is in voltage loss or becomes low and a breaker trips to start, and when the IA bus becomes low and fails to cause the transformer trips to start, a voltage loss bus load and a load value of an adjacent bus are calculated, and the voltage loss bus load and a capacity threshold of the transformer to be put into are compared to see whether the capacity meets the size of a required load;
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.
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 preferable 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 embodiment of the invention collects the electrical data such as bus voltage, low voltage, switch position, real-time current and the like of two power distribution rooms through the low-voltage intelligent backup power automatic switching device, and transmits the collected electrical data to the master station platform in real time for analysis and processing through a wireless communication technology.
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 communication system provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of a low-voltage intelligent backup power automatic switching device 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 invention provides a communication system of a low-voltage intelligent backup power automatic switching device, which comprises a master station platform for finally receiving and processing data acquired by the low-voltage intelligent backup power automatic switching device, wherein the low-voltage intelligent backup power automatic switching device comprises a low-voltage intelligent backup power automatic switching device for connecting two power distribution room buses and acquiring bus line data of the power distribution room, the low-voltage intelligent backup power automatic switching device is connected with switches on the lines through wireless communication control to realize a backup power automatic switching function, the low-voltage intelligent backup power automatic switching device is connected with an intelligent low-voltage monitoring terminal through ethernet wireless communication, and the intelligent low-voltage monitoring terminal is connected with the master station platform through wireless communication.
As shown in fig. 2, the low-voltage intelligent backup power automatic switching device acquires and controls an acquisition unit on a bus line through an RS485 communication module to acquire telemetering and remote signaling signals of each outgoing line loop; and the intelligent low-voltage monitoring terminal transmits the data analyzed and processed by the intelligent low-voltage monitoring terminal to the master station platform through a 4G channel or a special optical fiber channel.
The two power distribution rooms are respectively marked as a power distribution room A and a power distribution room B, the low-voltage intelligent spare power automatic switching device is respectively in wireless communication connection with an IA bus of the 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 spare 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, a current acquisition module and a switch B are arranged between the IB bus and the transformer B, and the low-voltage intelligent spare power automatic switching device is in wireless communication connection with the switch A and the switch B; and voltage acquisition modules are connected to two ends of the transformer A and the transformer B.
As a preferable scheme of the 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.
The IA bus and the IB bus operate in a segmented mode, when the IA bus is in voltage loss or a low-voltage breaker is subjected to jump starting, when the IA bus is in low voltage and breaks down to cause the jump starting of a transformer, the load value of the voltage loss bus and the load value of an 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 size of the required load 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.
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.
The buss line data includes buss voltage, low to low voltage, switch position, real time current. The low-voltage intelligent backup power automatic switching device comprises an automatic breaking incoming line switch and a breaking outgoing line switch.
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.
The embodiment of the invention collects the electrical data such as bus voltage, low voltage, switch position, real-time current and the like of two power distribution rooms through the low-voltage intelligent backup power automatic switching device, and transmits the collected electrical data to the master station platform in real time for analysis and processing through a wireless communication technology.
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 utility model provides a communication system that low pressure intelligence was equipped with automatic switching, its characterized in that, is including the main website platform that is used for finally receiving and handling the data that low pressure intelligence was equipped with automatic switching system gathered, low pressure intelligence is equipped with automatic switching system and is still including the low pressure intelligence that is used for connecting two distribution room generating lines and is used for gathering distribution room generating line data and is equipped with automatic switching device, the automatic switching function of the spare power automatic switching is realized to the switch that low pressure intelligence was equipped with automatic switching device and on connecting each circuit through wireless communication control, low pressure intelligence is equipped with intelligent low pressure monitor terminal through ethernet wireless communication connection, intelligent low pressure monitor terminal wireless communication connection main website platform.
2. The communication system of claim 1, wherein the low-voltage intelligent backup power automatic switching device controls an acquisition unit on a bus line through an RS485 communication module to acquire telemetering and remote signaling signals of each outlet loop.
3. The communication system of claim 1, wherein the intelligent low-voltage monitoring terminal transmits the data analyzed and processed by the intelligent low-voltage monitoring terminal to the master station platform through a 4G channel or a proprietary fiber channel.
4. The communication system of claim 1, wherein two of the power distribution rooms are respectively marked as a power distribution room a and a power distribution room B, the low-voltage intelligent backup power automatic switching device is respectively connected with an IA bus of the power distribution room a and an IB bus of the power distribution room in a wireless communication manner, 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.
5. The communication system of claim 4, wherein 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, a current acquisition module and a switch B are arranged between the IB bus and the transformer B, and the low-voltage intelligent spare power automatic switching device is in wireless communication connection with the switch A and the switch B; and voltage acquisition modules are connected to two ends of the transformer A and the transformer B.
6. The communication system of 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 communication system of low-voltage intelligent spare power automatic switching device according to claim 6,
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, calculating the load value of the voltage-loss IA bus and the load value of the adjacent IA bus, comparing the load of the voltage-loss IA bus with the capacity threshold value of the transformer to be put into, and judging whether the capacity threshold value meets the 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.
8. The communication system of low-voltage intelligent spare power automatic switching device according to claim 6,
the IA bus and the IB bus operate in a segmented mode, when the IB bus becomes low and breaks down to cause the transformer to jump and start, the load value of the voltage-loss IB bus and the load value of the adjacent IB bus are calculated, the voltage-loss IB bus load is compared with the capacity threshold value of the transformer to be put into, and whether the capacity meets the required load size is judged;
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 IB bus fails, the switch C is locked, and the spare power automatic switching function is stopped.
9. The communication system of claim 1, wherein the bus line data comprises bus voltage, switch position, and real-time current.
10. The communication system of the low-voltage intelligent backup power automatic switching device according to claim 1, wherein the low-voltage intelligent backup power automatic switching device comprises an automatic breaking incoming line switch and a breaking outgoing line switch.
CN201911167425.0A 2019-11-25 2019-11-25 Low-voltage intelligent spare power automatic switching communication system Pending CN110932395A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111697580A (en) * 2020-07-01 2020-09-22 广东电网有限责任公司 Low-voltage spare power automatic switching device suitable for load transfer of power distribution room

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111697580A (en) * 2020-07-01 2020-09-22 广东电网有限责任公司 Low-voltage spare power automatic switching device suitable for load transfer of power distribution room

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