CN110336243A - Long-distance superconducting cable comprehensive monitoring protection device - Google Patents
Long-distance superconducting cable comprehensive monitoring protection device Download PDFInfo
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- CN110336243A CN110336243A CN201910574821.9A CN201910574821A CN110336243A CN 110336243 A CN110336243 A CN 110336243A CN 201910574821 A CN201910574821 A CN 201910574821A CN 110336243 A CN110336243 A CN 110336243A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 68
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 19
- 230000003993 interaction Effects 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 21
- 229910052757 nitrogen Inorganic materials 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 238000005057 refrigeration Methods 0.000 description 5
- 230000036760 body temperature Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002887 superconductor Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
-
- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/228—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 for distribution gear, e.g. bus-bar systems; for switching devices for covered wires or cables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/34—Cable fittings for cryogenic cables
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- Engineering & Computer Science (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a superconducting cable comprehensive monitoring protection device, which is used for monitoring and protecting a superconducting cable arranged between two transformer substations, and is connected with a superconducting cable cooling control system, a power distribution device, a transformer substation computer monitoring system in the transformer substations and a superconducting cable comprehensive monitoring protection device in the opposite transformer substations, and comprises the following components: a man-machine interaction panel arranged on the front panel of the shell; the plug-in board card is arranged in the shell and comprises a power supply board, a CPU board, a management board, an analog input board, a switching value output board and a communication board. The invention can monitor and process various analog quantities and switching values, so that interaction is formed among various protection settings, and timely and perfect monitoring and protection are provided for the superconducting cable.
Description
Technical field
The invention belongs to superconductor technology fields, and in particular to a kind of long range hyperconductive cable comprehensive monitoring protection device.
Background technique
With the development of economy and social progress, electric energy improve city at main energy sources indispensable for people's lives
The power supply capacity and reliability of city's power distribution network are the important duties of grid company.In recent years, city dweller is to caused by overhead line
The tolerance of electromagnetic action and visual pollution generally reduces, and power and distribution supply cable becomes a kind of inexorable trend with entering.And high-temperature superconductor
Cable has many advantages, such as line loss is low, transmission capacity is big, corridor takes up little area, is environmental-friendly, for power grid provide it is a kind of it is efficient,
Compact, reliable, green electric energy transmission mode.Comprehensively consider electric power energy demand sustainable growth, the power transmission and distribution of some areas underground
Corridor, which has hastened towards saturation, waits factors, can realize that the superconductive power transmission technology of efficient low-loss and large capacity electrical energy transportation will be simultaneously
Large city power supply facing challenges provide feasible solution.
But in the prior art, the domestic ac superconducting cable engineering to put into operation in the past belongs to prototype version project,
Cable arrangements are in substation or on-site, and cable length is in 100m hereinafter, the design comparison of its Control protection system is simple.Superconduction
The circulating cooling system of cable carries the sensors such as temperature, pressure, guarantees that refrigeration system is normally transported by the control cabinet of mating offer
Turn.When internal or external failure occurs for hyperconductive cable, the breaker connected by overcurrent protection tripping cable head-end makes superconduction
Cable is out of service.
In contrast, urban power distribution network hyperconductive cable requirement of engineering connects Liang Ge substation, and length often exists
400m or more can reach kilometer grade.Since long range hyperconductive cable involves great expense, operating condition is complicated, previous control protection
Scheme has been unable to meet requirement.Therefore, it is necessary to which design synthesis monitoring and protecting device, provides perfect for long range hyperconductive cable
Monitoring and protection.
Existing hyperconductive cable monitoring system (or online monitoring system, circulating cooling control system) generally refers to super
Lead refrigeration system realize monitoring with control relatively independent subsystem, monitor circulating cooling system each section working condition and
The technical parameter (mainly non-electrical parameter) of cable system, the operation of control loop cooling system, it is ensured that superconducting cable conductor
Cold operation environment.
The parameter of hyperconductive cable monitoring system monitoring mainly has liquid nitrogen temperature, pressure, flow etc., and design parameter is according to cooling
Different type and the producer of system and it is different.Monitoring system is by being installed on the sensing of refrigeration system and cable body everywhere
Device perceives each monitoring physical quantity, is then converted into carrying out data processing after sending on electric signal by transmitter.
Existing hyperconductive cable guard method is the no-delay fast tripping protection of configuration, inverse-time overcurrent protection, specified time overcurrent
The protection such as protection, decides whether tripping circuit breaker according to the size of cable current.Protective device and hyperconductive cable monitoring system it
Between it is mutually indepedent, without information exchange, it is difficult to realize the cooperation under complicated operating condition between system.
Summary of the invention
It, can be with the problem to be solved by the present invention is that provide a kind of long range hyperconductive cable comprehensive monitoring protection device
Processing is monitored to multiple analog amount and switching value, makes to form interaction between a variety of protection settings, thus to hyperconductive cable
Timely and perfect monitoring and protection are provided.
In order to solve the above-mentioned technical problem, an aspect of of the present present invention provides a kind of hyperconductive cable comprehensive monitoring protection device,
For being monitored protection to the hyperconductive cable being set between Liang Ge substation, it is set to the end of hyperconductive cable, with
In hyperconductive cable cooling control system, power distribution equipment, computer monitoring system of transformer substation and opposite side substation in substation
Hyperconductive cable comprehensive monitoring protection device be attached comprising:
Shell is arranged man-machine interaction panel on the shell front panel, operation is provided in the man-machine interaction panel
Button, liquid crystal display, alarm indicator and debugging port；
The enclosure interior is provided with plug-in type board, includes power panel, CPU board, management board, analog input
Plate, On-off signal plate, digital output module and communication board；
Wherein, the power panel is for converting DC power supply, output to other boards；
The analog input is for receiving the external mould from the hyperconductive cable cooling control system, power distribution equipment
Analog quantity, the external analog amount include electric current, voltage, temperature, pressure and flow simulation amount；
The CPU board and the management board are mutually redundant backup, and the CPU board or management front edge of board are respectively connected with the mould
Analog quantity input board, the CPU board or management board rear end are respectively connected with On-off signal plate, digital output module；
The communication board is connected with the CPU board and management board, and connects the hyperconductive cable cooling control system, matches
Hyperconductive cable comprehensive monitoring protection device in electric installation, computer monitoring system of transformer substation and opposite side substation, for sending out
Send control command, breaker tripping and closing order or information.
Preferably, include in the CPU board or management board:
Low-pass filter unit is connect with the analog input, for receiving external analog quantity；
A/D converting unit, for the analog quantity of the outside to be converted to small voltage signal；
First CPU element is connected with the A/D converting unit；
Second CPU element is connected with first CPU element, and connects man-machine communication mouth and port；
Complex Programmable Logic Devices unit, respectively with first CPU element, the second CPU element, On-off signal
Plate, digital output module connection carry out Data Format Transform for receiving the external switch amount input from On-off signal plate
After be sent to the first CPU element, and carry out the control signal of the second CPU element to send switching value after Data Format Transform defeated
Ejecting plate is sent to outside.
Preferably, the 2nd CPU is connected with port and man-machine communication mouth, the man-machine communication mouth and the man-machine friendship
Mutual panel is communicated.
Preferably, light-coupled isolation device is provided in the On-off signal plate.
Preferably, it in the external analog amount, is obtained including current transformer, the voltage transformer from power distribution equipment super
Cable branch current, busbar voltage；Circuit breaker position, the breaker obtained from the circuit breaker operation mechanism of power distribution equipment is abnormal
Signal；Circulating cooling medium temperature, the pressure, flow obtained from circulating cooling control system；And superconduct according to being embedded in
The cable body temperature that temperature-measuring optical fiber sensor in cable obtains.
Preferably, the hyperconductive cable comprehensive monitoring protection device includes: to come to the signal that computer supervisory control system transmits
From the analog quantity information, the on-off model from On-off signal plate and the action signal of its own of analog input
And fault-signal.
Preferably, the CPU board or management board further monitor that hyperconductive cable and both ends are disconnected according to the information of acquisition in real time
The operating status of road device issues alarm signal in equipment operation exception or accident.
Preferably, the CPU board or management board are further used for by cable body and a variety of electrical quantity of electrical equipment
With the detection of non-electric quantity signal, realize to the faulty standard of institute including super-conductive cable system internal fault and external fault
Really identification and quick acting, wherein using fibre-optic current differential protection as main protection, with directional current protection, zero-sequence current protection
Deng for back-up protection, protection algorism combines hyperconductive cable operating status and quenches criterion.
Preferably, the order that the CPU board or management board are sent to the circulating cooling control system includes at least circulation
Cooling system control command or hyperconductive cable self- recoverage control command, wherein circulating cooling system control command is to control liquid
Nitrogen temperature, liquid nitrogen pressure, pump box or the liquid level excessively in ice chest；Hyperconductive cable self- recoverage control command is used for when hyperconductive cable is because outer
Portion's electric network fault cause cable to lose superconducting state and it is out of service after, hyperconductive cable ontology restore superconducting state after throw automatically
Enter operation；
The CPU board or management board are included at least to the order that the power distribution equipment is sent: breaker point closes, reclosing
Operational order by tripping or closes the breakers of cable ends for hyperconductive cable for after failure or fault recovery
It is isolated with power grid or connects.
The implementation of the embodiments of the present invention has the following beneficial effects:
A kind of long range hyperconductive cable comprehensive monitoring protection device provided by the invention can be adopted simultaneously in a device
Collect hyperconductive cable ontology and refrigeration system, the electrical quantity of associated electrical apparatus and non-electric quantity can by comprehensive descision and decision
Exception or inside for superconductive power transmission system, external fault, which are made, quickly and reliably to be responded, thus it is possible to vary existing superconduction item
Monitoring system and the status that protection system is respectively independently arranged, information exchange is few in mesh make to be formed between a variety of protection settings and hand over
Mutually, to provide hyperconductive cable timely and perfect monitoring and protection.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of operation of one embodiment of long range hyperconductive cable comprehensive monitoring protection device provided by the invention
Environment schematic；
Fig. 2 is a kind of structure of one embodiment of long range hyperconductive cable comprehensive monitoring protection device provided by the invention
Schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear and complete
Ground description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without making creative work it is obtained it is all its
Its embodiment, shall fall within the protection scope of the present invention.
As shown in Figure 1, being an a kind of implementation of long range hyperconductive cable comprehensive monitoring protection device provided by the invention
The running environment schematic diagram of example；Together as shown in connection with fig. 2, long range hyperconductive cable comprehensive monitoring protection device provided by the invention
1 can connect Liang Ge substation, protects core equipment for the control as the hyperconductive cable in Liang Ge substation, belongs to change
Power station electrical secondary equipment can respectively install the double sets of a set of or redundancy in the substation at superconducting cable line both ends.Specifically, originally
The hyperconductive cable comprehensive monitoring protection device 1 provided is invented, for carrying out to the hyperconductive cable being set between Liang Ge substation
Monitoring protection, is set to the end of hyperconductive cable, with hyperconductive cable cooling control system 2, the power distribution equipment in substation
3, the hyperconductive cable comprehensive monitoring protection device in computer monitoring system of transformer substation 5 and opposite side substation is attached,
In, hyperconductive cable cooling control system 2 is connected with circulating cooling system 4；Described device 1 includes:
Man-machine interaction panel 10 is arranged on the shell front panel, is provided with behaviour in the man-machine interaction panel for shell
Make button, liquid crystal display, alarm indicator and debugging port；In a specific example, the shell can be used
Standard 4U cabinet is mountable in standard screen cabinet；
The enclosure interior is provided with plug-in type board, includes power panel 11, CPU board 12, management board 13, analog quantity
Input board 14, On-off signal plate 15, digital output module 16 and communication board 17；
Wherein, the power panel 11 is for converting DC power supply, output to other boards, specifically, can incite somebody to action
220V or 110V DC converting is at required voltage (such as 24V/12V/5V) inside device；
The analog input 14 is for receiving the outside from the hyperconductive cable cooling control system, power distribution equipment
Analog quantity, the external analog amount include electric current, voltage, temperature, pressure and flow simulation amount；
The CPU board 12 is mutually redundant backup with the management board 13, and the CPU board 12 or 13 front end of management board are all connected with
There is the analog input, the CPU board 12 or 13 rear end of management board are respectively connected with On-off signal plate 15, output switch parameter
Plate 16；
The communication board 17 is connected with the CPU board 12 and management board 13, and connects the cooling control of the hyperconductive cable
Hyperconductive cable comprehensively monitoring protection in system 2, power distribution equipment 3, computer monitoring system of transformer substation 5 and opposite side substation
Device, for sending control command, breaker tripping and closing order or information.In some specific examples, communication board 17 is according to interface need
Want configuration high-speed Ethernet power port or optical port and 485 serial ports etc..
More specifically, including in the CPU board 12 or management board 13:
Low-pass filter unit is connect with the analog input, for receiving external analog quantity；
A/D converting unit, for the analog quantity of the outside to be converted to small voltage signal；
First CPU element is connected with the A/D converting unit；
Second CPU element is connected with first CPU element, and connects man-machine communication mouth and port；
Complex Programmable Logic Devices unit (CPLD), respectively with first CPU element, the second CPU element, switch
Input board, digital output module connection are measured, for receiving the external switch amount input from On-off signal plate, carries out data lattice
It is sent to the first CPU element after formula conversion, and is opened being sent after the control signal progress Data Format Transform of the second CPU element
Output board is measured in pass, sends to outside.Specifically, electric current, voltage, temperature, pressure, flow etc. are converted by analog input
At small voltage signal, CPU board 12 and management board 13 are respectively enterd, after filtering, A/D conversion, into the first CPU element.
First CPU element is monitored, protects the operation of data, is as a result transmitted to the second CPU element.Second CPU element is monitored, protects
The logical operation and control of export of shield are completed at the same time logout, background communication and the communication function with man-machine interface.
In one embodiment, the 2nd CPU is connected with port and man-machine communication mouth, the man-machine communication mouth and institute
Man-machine interaction panel is stated to be communicated.
It is provided with light-coupled isolation device in the On-off signal plate, such as 220/110V light-coupled isolation can be carried out, it can
With understanding, switching value has switching two states using no source contact.
In the 14 received external analog amounts of institute of the analog input, including from power distribution equipment 3 current transformer,
The hyperconductive cable branch current of voltage transformer acquisition, busbar voltage；What is obtained from the circuit breaker operation mechanism of power distribution equipment 3 is disconnected
Road device position, breaker abnormal signal；Circulating cooling medium temperature, the pressure, flow obtained from circulating cooling control system 2；
And the cable body temperature obtained according to the temperature-measuring optical fiber sensor being embedded in hyperconductive cable.Wherein, current-mode analog quantity is
Main electrical equipment electric current is converted to the low current of 0~1A, convenient for integration unit acquisition, processing；Voltage analog is similar, will
10kV voltage is converted to 0~100V voltage.Non electrical quantity analog quantity is by various sensors by physics such as temperature, pressure, flows
Amount is converted to the weak electric signal of 4~20mA.
The hyperconductive cable comprehensive monitoring protection device 1 includes: to come from simulation to the signal that computer supervisory control system transmits
Measure analog quantity information, the on-off model from On-off signal plate and the action signal of its own and event of input board 14
Hinder signal.
More specifically, the CPU board 12 or management board 13 further according to the information of acquisition monitor in real time hyperconductive cable and
The operating status of both ends breaker issues alarm signal in equipment operation exception or accident.
More specifically, the CPU board 12 or management board 13 are further used for by a variety of to cable body and electrical equipment
The detection of electrical quantity and non-electric quantity signal is realized to all including super-conductive cable system internal fault and external fault
Failure accurately identifies and quick acting, wherein using fibre-optic current differential protection as main protection, with directional current protection, zero sequence electricity
Stream protection etc. is back-up protection, and protection algorism combines hyperconductive cable operating status and quenches criterion.
More specifically, the CPU board 12 or management board 13 are at least wrapped to the order that the circulating cooling control system 2 is sent
Include circulating cooling system control command or hyperconductive cable self- recoverage control command, wherein circulating cooling system control command to
Control liquid nitrogen temperature, liquid nitrogen pressure, pump box or the liquid level excessively in ice chest；Hyperconductive cable self- recoverage control command, which is used to work as, to be superconducted
Cable because cable is caused to lose superconducting state for external electrical network failure it is out of service after, hyperconductive cable ontology restore superconducting state after
Automatically engage operation；
The CPU board 12 or management board 13 are included at least to the order that the power distribution equipment 3 is sent: breaker point closes, again
Closing operation order by tripping or closes the breakers of cable ends for superconduction for after failure or fault recovery
Cable is isolated or is connected with power grid.
To sum up, hyperconductive cable comprehensive monitoring protection device 1 can complete following functions:
(1) signal acquisition
Hyperconductive cable branch current, busbar voltage are obtained from current transformer, the voltage transformer of power distribution equipment；
Circuit breaker position, breaker abnormal signal are obtained from the circuit breaker operation mechanism of power distribution equipment；
Circulating cooling medium temperature, pressure, flow are obtained from circulating cooling control system；
Cable body temperature is obtained according to temperature-measuring optical fiber sensor be embedded in hyperconductive cable.
(2) it is sent on signal
Except the analog quantity for acquiring device, send to computer supervisory control system on on-off model in addition to, also on send integration unit
The action signal and fault-signal of itself.
(3) operation monitoring
The operating status for monitoring hyperconductive cable and both ends breaker in real time according to the information of acquisition, equipment be operating abnormally or
Alarm signal is issued when accident.Such as: hyperconductive cable liquid nitrogen inlet temperature or outlet temperature are lower than more than alarming value, liquid nitrogen flow
Situations such as alarming value, thinks that system is operating abnormally；Liquid nitrogen outlet is more than temperature difference limit definite value with inlet temperature difference, then it is assumed that system
Generation accident.
(4) relay protection
By the detection to cable body and electrical equipment a variety of electrical quantity and non-electric quantity signal, realize to including superconduction
Institute including cable system internal fault and external fault is faulty to be accurately identified and quick acting.Device is differential with fibre-optic current
Protection is main protection, and with directional current protection, zero-sequence current protection etc. for back-up protection, protection algorism combines hyperconductive cable to transport
Row state and quench criterion.
(5) control and operation
Circulating cooling system control command；Different according to specific vendor product, typical case controls control command such as: 1. liquid
Nitrogen temperature control command: by adjusting adjusting of the refrigerator operation quantity realization to overall refrigerating effect, to guarantee at cable outlet
Liquid nitrogen temperature；2. liquid nitrogen pressure control command: adjust liquid nitrogen pump pressure head and control valve and balance system pressure；3. liquid
Nitrogen flow control commands: control valve adjusts the revolving speed of liquid nitrogen pump；4. pump box crosses liquid level order in ice chest: passing through control valve
Open supplement liquid nitrogen.
Hyperconductive cable self- recoverage control command；When hyperconductive cable is due to external electrical network failure causes cable to lose superconducting state
When out of service, since super-conductive cable system itself does not break down, therefore superconducting state can be restored in hyperconductive cable ontology
After automatically engage operation, realize the hyperconductive cable self- recoverage control function under external electrical network failure, it is reliable to improve power grid power supply
Property.
Breaker point, closing operation order.For the short trouble of superconductive power transmission internal system or outside, it will lead to and superconduct
Larger current is flowed through in cable, and then cable is caused to lose superconducting state.In such case by the breaker of tripping cable ends
Hyperconductive cable is isolated with power grid, to play the role of protecting hyperconductive cable.
In addition, hyperconductive cable comprehensive monitoring protection device 1 can be interacted with other systems, specifically:
Hyperconductive cable cooling control system 2 provides the important mould of hyperconductive cable to hyperconductive cable comprehensive monitoring protection device 1
Analog quantity and on-off model enable hyperconductive cable comprehensive monitoring protection device 1 to perceive the work shape of hyperconductive cable cooling system
State, and control command can be issued to hyperconductive cable cooling control system 2.
Hyperconductive cable comprehensive monitoring protection device 1 acquire hyperconductive cable current/voltage analog quantity, circuit breaker position information and
Status information, and the operations such as breaker point, conjunction, reclosing control can be carried out to power distribution equipment 3.
Hyperconductive cable comprehensive monitoring protection device 1 is used as power transformation station equipment, needs to supervise with the transformer substation computer in station
Control system is communicated, and necessary information is reported, and executes transmitting order to lower levels.
The hyperconductive cable comprehensive monitoring protection device of hyperconductive cable comprehensive monitoring protection device 1 and the hyperconductive cable other end it
Between can communicate, exchange operation information, carry out comprehensive descision, coordinate execute control action.
The implementation of the embodiments of the present invention has the following beneficial effects:
A kind of long range hyperconductive cable comprehensive monitoring protection device provided by the invention can be adopted simultaneously in a device
Collect hyperconductive cable ontology and refrigeration system, the electrical quantity of associated electrical apparatus and non-electric quantity can by comprehensive descision and decision
Exception or inside for superconductive power transmission system, external fault, which are made, quickly and reliably to be responded, thus it is possible to vary existing superconduction item
Monitoring system and the status that protection system is respectively independently arranged, information exchange is few in mesh make to be formed between a variety of protection settings and hand over
Mutually, to provide hyperconductive cable timely and perfect monitoring and protection；
Used in the urban power distribution network transformation over long distances for (several hundred rice and several kilometers) hyperconductive cable transmission system,
Its equipment manufacturing cost is sufficiently expensive, and operating condition is complicated.Monitoring in the prior art, protection autonomous system have been difficult to meet and are
System reliability requirement, has a wide range of applications field using long range hyperconductive cable comprehensive monitoring protection device provided by the invention
Scape.
The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (9)
1. a kind of hyperconductive cable comprehensive monitoring protection device, for being supervised to the hyperconductive cable being set between Liang Ge substation
Control protection, be set to the end of hyperconductive cable, which is characterized in that its in substation hyperconductive cable cooling control system,
Hyperconductive cable comprehensive monitoring protection device in power distribution equipment, computer monitoring system of transformer substation and opposite side substation carries out
Connection comprising:
Man-machine interaction panel is arranged on the shell front panel in shell, be provided in the man-machine interaction panel operation button,
Liquid crystal display, alarm indicator and debugging port；
The enclosure interior is provided with plug-in type board, includes power panel, CPU board, management board, analog input, open
Measure input board, digital output module and communication board in pass；
Wherein, the power panel is for converting DC power supply, output to other boards；
The analog input is for receiving the external analog from the hyperconductive cable cooling control system, power distribution equipment
Amount, the external analog amount includes electric current, voltage, temperature, pressure and flow simulation amount；
The CPU board and the management board are mutually redundant backup, and the CPU board or management front edge of board are respectively connected with the analog quantity
Input board, the CPU board or management board rear end are respectively connected with On-off signal plate, digital output module；
The communication board is connected with the CPU board and management board, and connects the hyperconductive cable cooling control system, with Denso
It sets, the hyperconductive cable comprehensive monitoring protection device in computer monitoring system of transformer substation and opposite side substation, for sending control
System order, breaker tripping and closing order or information.
2. hyperconductive cable comprehensive monitoring protection device as described in claim 1, which is characterized in that the CPU board or management board
In include:
Low-pass filter unit is connect with the analog input, for receiving external analog quantity；
A/D converting unit, for the analog quantity of the outside to be converted to small voltage signal；
First CPU element is connected with the A/D converting unit；
Second CPU element is connected with first CPU element, and connects man-machine communication mouth and port；
Complex Programmable Logic Devices unit, respectively with first CPU element, the second CPU element, On-off signal plate,
Digital output module connection, for receiving the external switch amount input from On-off signal plate, after carrying out Data Format Transform
It is sent to the first CPU element, and sends output switch parameter after the control signal of the second CPU element is carried out Data Format Transform
Plate is sent to outside.
3. hyperconductive cable comprehensive monitoring protection device as claimed in claim 3, which is characterized in that the 2nd CPU is connected with
Port and man-machine communication mouth, the man-machine communication mouth are communicated with the man-machine interaction panel.
4. hyperconductive cable comprehensive monitoring protection device as claimed in claim 4, which is characterized in that in the On-off signal plate
It is provided with light-coupled isolation device.
5. hyperconductive cable comprehensive monitoring protection device as claimed in claim 5, which is characterized in that in the external analog amount,
The hyperconductive cable branch current that is obtained including current transformer, the voltage transformer from power distribution equipment, busbar voltage；From with Denso
Circuit breaker position, the breaker abnormal signal for the circuit breaker operation mechanism acquisition set；It is followed from what circulating cooling control system obtained
Ring coolant temperature, pressure, flow；And the cable sheet obtained according to the temperature-measuring optical fiber sensor being embedded in hyperconductive cable
Temperature.
6. hyperconductive cable comprehensive monitoring protection device as claimed in claim 6, which is characterized in that the comprehensive prison of the hyperconductive cable
Control protective device to the signal that computer supervisory control system transmits include: analog quantity information from analog input, from opening
The on-off model of pass amount input board and the action signal of its own and fault-signal.
7. hyperconductive cable integrated monitoring apparatus as claimed in claim 7, which is characterized in that the CPU board or management board are into one
Step monitors the operating status of hyperconductive cable and both ends breaker according to the information of acquisition in real time, in equipment operation exception or accident
Issue alarm signal.
8. hyperconductive cable integrated monitoring apparatus as claimed in claim 8, which is characterized in that the CPU board or management board are into one
Step is for realizing to including superconducting by the detection to cable body and electrical equipment a variety of electrical quantity and non-electric quantity signal
Institute including cable internal system failure and external fault is faulty to be accurately identified and quick acting, wherein differential with fibre-optic current
Protection is main protection, and with directional current protection, zero-sequence current protection etc. for back-up protection, protection algorism combines hyperconductive cable to transport
Row state and quench criterion.
9. hyperconductive cable integrated monitoring apparatus as claimed in claim 8, which is characterized in that the CPU board or management board are to institute
The order for stating the transmission of circulating cooling control system includes at least circulating cooling system control command or hyperconductive cable self- recoverage controls
Order, wherein circulating cooling system control command is to control liquid nitrogen temperature, liquid nitrogen pressure, pump box or the liquid level excessively in ice chest；
Hyperconductive cable self- recoverage control command is used to exit due to external electrical network failure causes cable to lose superconducting state when hyperconductive cable
After operation, operation is automatically engaged after hyperconductive cable ontology restores superconducting state；
The CPU board or management board are included at least to the order that the power distribution equipment is sent: breaker point closes, reclosing operation
Order by tripping or closes the breakers of cable ends for hyperconductive cable and electricity for after failure or fault recovery
Net isolation or connection.
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| CN112564056A (en) * | 2020-12-02 | 2021-03-26 | 深圳供电局有限公司 | High-temperature superconducting cable fault protection system |
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