CN107508385A - One kind utilizes the faradic electricity getting system of overhead ground wire and method - Google Patents
One kind utilizes the faradic electricity getting system of overhead ground wire and method Download PDFInfo
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- CN107508385A CN107508385A CN201710710459.4A CN201710710459A CN107508385A CN 107508385 A CN107508385 A CN 107508385A CN 201710710459 A CN201710710459 A CN 201710710459A CN 107508385 A CN107508385 A CN 107508385A
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- 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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- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses one kind to utilize the faradic electricity getting system of overhead ground wire and method, and the system includes：The electricity getting device of interconnection and multiple mutual inductance modules, electricity getting device are arranged on steel tower, and mutual inductance module is arranged on overhead ground wire；Induction module is used to obtain induced-current caused by sensing on overhead ground wire；Rectification filtering module uses bridge rectifier, and the alternating voltage for mutual inductance module to be got is converted to DC voltage；Communication module is sampled to be used to monitor the induced-current size of overhead ground wire and the electricity of power module in real time；Power termination laminating module is used to carry out the power that multiple mutual inductance modules are got to be sent into power module after collecting superposition.It is that ground potential is installed that the present invention, which takes energy equipment, and securely and reliably, except current transformer is nested on overhead ground wire, remaining companion module is mountable on steel tower, and it is not constrained by weight and volume condition relatively.
Description
Technical field
The present invention relates to technical field of power systems, more particularly to one kind to utilize the faradic power taking system of overhead ground wire
System and method.
Background technology
It is following development trend of power system to build intelligent grid, and the intelligent construction of wherein transmission line of electricity is power train
The important component of system.Problems faced is first had in power transmission line intelligent process of construction to be how in high pressure forceful electric power
Stable power supply is provided under magnetic field environment to intelligent equipment.
Application No. 200820066665.2, patent of invention turn into the patent document of high-tension line sensing electricity getting device, profit
The power taking from transmission line of electricity with transformer principle, its index provided are that grid load electric current is defeated in 80A-300A
It is 20-110W to go out power, but during transmission line of electricity zero load, current in wire is only 40A or so, does not also provide now electricity getting device
Power output, and as the increase of electric current on transmission line of electricity, electricity getting device can also generate heat increasingly severe.
Existing sensing electricity getting device is substantially on wire, takes energy using phase line current, and apply in general to
Architomy wire.In addition, above-mentioned patent can not understand the running situation of energy taking device on the line in real time, its energy taking device is being tied
Powered installation is installed as on structure, certain risk be present.
The content of the invention
The technical problem to be solved in the present invention is all to be mounted on wire for electricity getting device in the prior art, installs
The defects of difficulty is big, and is all to take energy using phase line current in the prior art, and safety coefficient is relatively low, there is provided one kind is kept away using aerial
The faradic electricity getting system of thunder line and method.
The technical solution adopted for the present invention to solve the technical problems is：
The present invention provides one kind and utilizes the faradic electricity getting system of overhead ground wire, in ultra-high-tension power transmission line
On steel tower and overhead ground wire, the system includes the electricity getting device being connected with each other and multiple mutual inductance modules, electricity getting device are arranged on
On steel tower, mutual inductance module is arranged on overhead ground wire；Wherein：
Induction module is used to obtain induced-current caused by sensing on overhead ground wire；
Electricity getting device include be sequentially connected lightning protection module, overcurrent protection module, rectification filtering module, sampling communication
Module, power termination laminating module and power module；Lightning protection module is used to avoid overhead ground wire by being damaged when being struck by lightning
Electricity getting device；Overcurrent protection module is used to prevent that induced-current is excessive and damages electricity getting device on overhead ground wire；Rectifying and wave-filtering
Module uses bridge rectifier, and the alternating voltage for mutual inductance module to be got is converted to DC voltage；Sample communication module
For monitoring the induced-current size of overhead ground wire and the electricity of power module in real time；It will be more that power termination laminating module, which is used for,
The power that individual mutual inductance module is got carries out being sent into power module after collecting superposition.
Further, every 3 adjacent steel towers of the invention are one group, are connected with overhead ground wire between steel tower, every group
One electricity getting system is set on steel tower；The system includes 1 electricity getting device and 4 induction modules, electricity getting device are mounted on 3
On the steel tower in individual steel tower centre position, induction module is symmetrically mounted on the overhead ground wire adjacent with steel tower both sides.
Further, the input of lightning protection module of the invention is connected with induction module, and lightning protection module is three
Level lightning protection circuit, three-level lightning protection circuit include lightning-arrest decoupler, Transient Suppression Diode and piezo-resistance parallel with one another；Its
In, the thunder-strike current after decoupler of being taken shelter from the thunder by the first order is less than 2KA, and the second level, which is chosen, can bear 8/20us waveform maximum currents
6KA Transient Suppression Diode, the piezo-resistance of the third level are used to suppress residual voltage.
Further, overcurrent protection module of the invention includes protection circuit and acquisition control circuit, and protection circuit includes
Controllable silicon, controllable silicon driving chip and the triode being sequentially connected, acquisition control circuit include voltage monitoring chip and periphery electricity
Road.
Further, after sampling communication module of the invention includes the microcontrol processor of front end and the server of rear end
Platform, the analog voltage of sampling communication module collection mutual inductance module, microcontrol processor ADC pins are reached through electric resistance partial pressure, then
Data signal is converted into through analog-to-digital conversion, most afterwards through ftp agreements, by gsm wireless communication transfer to server background, for reality
When monitor circuit and the basic running situation of electricity getting device.
Further, the system of the invention also includes voltage comparator, and voltage comparator is used to monitor power module electricity
The output voltage of amount and power laminating module, so as to realize the power supply for load of automatically switching；Power laminating module it is normal
The voltage of output is 14.6V, and power module at full charge is 14.4V；Voltage comparator includes two diodes in parallel, according to
The forward conduction characteristic of diode, when overhead ground wire induced-current energy is enough, power laminating module output 14.6V electricity
Pressure, the voltage after being full of more than power module, is load supplying by power laminating module, and power module keeps floating punch die formula；
When overhead ground wire induced-current energy deficiency, then there are power laminating module and power module and provide power supply jointly for load；
When due to cause specific line outage, overhead ground wire induced-current is 0, now only provides electricity by power module for load
Source.
The present invention provides one kind and utilizes the faradic electricity-fetching method of overhead ground wire, comprises the following steps：
S1, the core section product by designing mutual inductance module and coil turn, make mutual inductance module reach maximum power output；
The alternating current flowed through in S2, ultra-high-tension power transmission line produces alternating magnetic field in space, and alternating magnetic field is cut by two
The space closure plane of root overhead ground wire and steel tower composition, sensing is produced by the mutual inductance module being nested on overhead ground wire
Electromotive force, and then induced-current is produced by the bulk resistor on loop；
The alternating voltage that S3, mutual inductance module sense to obtain obtains DC voltage through bridge rectifier；
S4, the size for monitoring DC voltage, when DC voltage exceedes threshold value, produce high level drive signal and protected to excessively stream
Module is protected, overcurrent protection module opens overcurrent protection function；When DC voltage is no more than threshold value, DC voltage is turned by voltage
Function laminating module is input to after changing；
S5, when overhead ground wire induced-current energy is enough, power laminating module output voltage fills more than power module
Voltage after full, is load supplying by power laminating module, and power module keeps floating punch die formula；When overhead ground wire induced electricity
During stream energy deficiency, then there are power laminating module and power module and provide power supply jointly for load；When due to cause specific circuit
During power failure, overhead ground wire induced-current is 0, now only provides power supply by power module for load.
Further, the core section product and coil turn of mutual inductance module are designed in this method of the invention, makes mutual inductance mould
The method that block reaches maximum power output is specially：
The peak power output of single mutual inductance module is：
Wherein, middle PSFor iron core peak power output, S accumulates for core section, and K is empirical coefficient；Empirical coefficient K values
For：When Ps is 0-10W, K values are 2；When Ps is 10-50W, K values are 1.75；When Ps is 50-500W, K values are 1.4；Ps
For 500-5000W when, K values be 1.2；When Ps is more than 5000W, K values are 1.
Assuming that rated power needed for load is Pa, rated power reserves 20% surplus, thus now can be by peak power PSIf
It is set to 1.25Pa, according to P nowSValue, corresponding K value is selected, so as to calculate corresponding core section product S.
According to overhead ground wire induced-current I, core section product S, then can be worked as by changing turn number N to find
Preceding maximum power point Pm；The VA values that the voltage that mutual inductance module senses to obtain under the conditions of this number of turn obtains through bridge rectifier are V1；
When the timing of overhead ground wire induced-current one, by rectification filtering module and overcurrent protection module by mutual inductor output voltage VA
Control is near V1, so as to obtain the maximum power output that current induced electricity flow valuve can be provided.
The beneficial effect comprise that：The present invention's utilizes the faradic electricity getting system of overhead ground wire and side
Method, overhead ground wire power taking is converted into compared to traditional phase line power taking.Because the electric current on overhead ground wire comes from phase line
Induced-current, its value is relatively small, can be basically stable at a less section, thus avoids in traditional energy taking device
The problem of low current power taking and high current power taking can not take into account, get around and caused electromagnetism saturation and long-time to big variable-current
There is the problem of power supply instability in rainy weather, and power supply reliability is strong, practical.And its another big advantage is ground potential peace
Dress, securely and reliably, except current transformer is nested on overhead ground wire, remaining companion module can install with steel tower, its
Do not constrained relatively by weight and volume condition.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the induced-current threedimensional model of the embodiment of the present invention；
Fig. 2 is the power taking schematic diagram of the embodiment of the present invention；
Fig. 3 is the cabinet inside top view of the embodiment of the present invention；
Fig. 4 is the circuit theory topological diagram of the embodiment of the present invention；
Fig. 5 is the lightning protection bridge rectifier of the embodiment of the present invention；
Fig. 6 is the current foldback circuit of the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in figure 1, the utilization faradic electricity getting system of overhead ground wire of the embodiment of the present invention, defeated installed in high pressure
On steel tower and overhead ground wire in electric line, the system includes the electricity getting device being connected with each other and multiple mutual inductance modules, power taking
Device is arranged on steel tower, and mutual inductance module is arranged on overhead ground wire；Wherein：
Induction module is used to obtain induced-current caused by sensing on overhead ground wire；
Electricity getting device include be sequentially connected lightning protection module, overcurrent protection module, rectification filtering module, sampling communication
Module, power termination laminating module and power module；Lightning protection module is used to avoid overhead ground wire by being damaged when being struck by lightning
Electricity getting device；Overcurrent protection module is used to prevent that induced-current is excessive and damages electricity getting device on overhead ground wire；Rectifying and wave-filtering
Module uses bridge rectifier, and the alternating voltage for mutual inductance module to be got is converted to DC voltage；Sample communication module
For monitoring the induced-current size of overhead ground wire and the electricity of power module in real time；It will be more that power termination laminating module, which is used for,
The power that individual mutual inductance module is got carries out being sent into power module after collecting superposition.
It is one group per 3 adjacent steel towers, overhead ground wire is connected between steel tower, a power taking is set on every group of steel tower
System；The system includes 1 electricity getting device and 4 induction modules, electricity getting device are mounted on the iron in 3 steel tower centre positions
On tower, induction module is symmetrically mounted on the overhead ground wire adjacent with steel tower both sides.
The input of lightning protection module is connected with induction module, and lightning protection module is three-level lightning protection circuit, and three-level is prevented
Thunder and lightning road includes lightning-arrest decoupler, Transient Suppression Diode and piezo-resistance parallel with one another；Wherein, moved back by the way that the first order is lightning-arrest
Thunder-strike current after coupling device is less than 2KA, and two poles of transient state suppression that can bear 8/20us waveform maximum currents 6KA are chosen in the second level
Pipe, the piezo-resistance of the third level are used to suppress residual voltage.
Overcurrent protection module includes protection circuit and acquisition control circuit, controllable silicon that protection circuit includes being sequentially connected,
Controllable silicon driving chip and triode, acquisition control circuit include voltage monitoring chip and peripheral circuit.
Sampling communication module includes the microcontrol processor of front end and the server background of rear end, sampling communication module collection
The analog voltage of mutual inductance module, microcontrol processor ADC pins are reached through electric resistance partial pressure, then numeral is converted into through analog-to-digital conversion
Signal, most afterwards through ftp agreements, by gsm wireless communication transfer to server background, for monitoring circuit and electricity getting device in real time
Basic running situation.
The system also includes voltage comparator, and voltage comparator is used to monitoring power module electricity and power laminating module
Output voltage, so as to realize the power supply for load of automatically switching；The voltage of the normal output of power laminating module is 14.6V,
Power module at full charge is 14.4V；Voltage comparator includes two diodes in parallel, special according to the forward conduction of diode
Property, when overhead ground wire induced-current energy is enough, power laminating module output 14.6V voltages are full of more than power module
Voltage afterwards, it is load supplying by power laminating module, and power module keeps floating punch die formula；When overhead ground wire induced-current
During energy deficiency, then there are power laminating module and power module and provide power supply jointly for load；Stop when due to cause specific circuit
When electric, overhead ground wire induced-current is 0, now only provides power supply by power module for load.
The embodiment of the present invention utilizes the faradic electricity-fetching method of overhead ground wire, comprises the following steps：
S1, the core section product by designing mutual inductance module and coil turn, make mutual inductance module reach maximum power output；
The alternating current flowed through in S2, ultra-high-tension power transmission line produces alternating magnetic field in space, and alternating magnetic field is cut by two
The space closure plane of root overhead ground wire and steel tower composition, sensing is produced by the mutual inductance module being nested on overhead ground wire
Electromotive force, and then induced-current is produced by the bulk resistor on loop；
The alternating voltage that S3, mutual inductance module sense to obtain obtains DC voltage through bridge rectifier；
S4, the size for monitoring DC voltage, when DC voltage exceedes threshold value, produce high level drive signal and protected to excessively stream
Module is protected, overcurrent protection module opens overcurrent protection function；When DC voltage is no more than threshold value, DC voltage is turned by voltage
Function laminating module is input to after changing；
S5, when overhead ground wire induced-current energy is enough, power laminating module output voltage fills more than power module
Voltage after full, is load supplying by power laminating module, and power module keeps floating punch die formula；When overhead ground wire induced electricity
During stream energy deficiency, then there are power laminating module and power module and provide power supply jointly for load；When due to cause specific circuit
During power failure, overhead ground wire induced-current is 0, now only provides power supply by power module for load.
The core section product and coil turn of mutual inductance module are designed in this method, mutual inductance module is reached maximum power output
Method be specially：
The peak power output of single mutual inductance module is：
Wherein, middle PS is iron core peak power output, and S accumulates for core section, and K is empirical coefficient；Empirical coefficient K values
For：When Ps is 0-10W, K values are 2；When Ps is 10-50W, K values are 1.75；When Ps is 50-500W, K values are 1.4；Ps
For 500-5000W when, K values be 1.2；When Ps is more than 5000W, K values are 1；
Assuming that rated power needed for load is Pa, typically reserved 20% surplus (depending on demand) of electronic product,
Thus now can be by peak power PSIt is arranged to 1.25Pa, according to P nowSValue, it can table look-up and consult K values, so as to calculate pair
The core section product S answered.
According to overhead ground wire induced-current I, core section product S, then can be worked as by changing turn number N to find
Preceding maximum power point Pm；The VA values that the voltage that mutual inductance module senses to obtain under the conditions of this number of turn obtains through bridge rectifier are V1；
When the timing of overhead ground wire induced-current one, by rectification filtering module and overcurrent protection module by mutual inductor output voltage VA
Control is near V1, so as to obtain the maximum power output that current induced electricity flow valuve can be provided.
In another specific embodiment of the present invention：
As shown in figure 1, three-phase conducting wire A, B, C arrange in angular distribution, in transmission line of electricity running, friendship is flowed through on wire
Time-dependent current, then produce alternating magnetic field in space.According to Maxwell's principle, alternating magnetic field cutting by two lightning protection ground wires and
The space closure plane formula of steel tower composition can produce induced electromotive force on this plane, in addition the bulk resistor on loop, then
Form induced-current.By mutual inductance modules nests on overhead ground wire, its induction coil both ends produces induced electromotive force, through lightning protection
Protection module, after AC/DC, DC/DC conversion, alternating current is converted into direct current, then through power laminating module and power management mould
Block interacts, final that stable power supply is provided for load.
The power taking schematic diagram of electricity getting device proposed by the present invention is as shown in Fig. 2 steel tower 1/2/3 and two overhead ground wire structures
Into two closed-loop intervals, on its overhead ground wire, inductive current direction is as is illustrated schematically.
Mutual inductance module 1/2 is respectively nested in steel tower 2 and the both sides at the node of overhead ground wire 1；
Mutual inductance module 3/4 is respectively nested in steel tower 2 and the both sides at the node of overhead ground wire 2；
Two directions of closed-loop interval induced currents 1/2 are as is illustrated schematically；
Aforementioned four mutual inductance module respectively constitutes four independent take can closed circuit；
Electricity getting device is fixed on steel tower 2, and is connected respectively with 4 mutual inductance modules；
Electricity getting device takes energy general power can power sum for taking for above-mentioned 4 mutual inductance modules；
Electricity getting device cabinet inside top view proposed by the present invention is as shown in figure 3, whole device can cabinet, PCB electricity by taking
Road plate, lithium battery and aviation socket composition.Wherein, 5, Fig. 3 left sides aviation socket connects 4 tunnel mutual inductance modules (first boat respectively
Dummy receptacle is as standby), the right is topmost GSM antenna head, and 3 aviation socket difference solar panels spare interfaces, power supplys are defeated
Exit port 1, output port of power source 2.
Mutual inductance module 1/2 is by bellows connecting line to PCB1 (upper left corner), and two-way alternating current is after AC-DC, to DC-
DC management modules PCB2 (on centre)；
Mutual inductance module 3/4 is by bellows connecting line to PCB2 (lower left corner), and two-way alternating current is after AC-DC, to DC-
DC management modules PCB2 (under middle)；
4 road DC-DC are connected to PCB3 (lower right corner), after power termination chip superposed collects above-mentioned 4 road gross energy, with lithium electricity
Pond (upper right corner) is common to provide stabilized power source for load；
Electricity getting device circuit theory topological diagram proposed by the present invention as shown in figure 4, will be directed to circuit theory diagrams to this below
Invention is described in further detail.
In embodiments of the present invention, the quantity of mutual inductance module is up to 4, and its specific number is by overhead ground wire induced electricity
The quiescent dissipation of stream and device load is determined；
Lightning protection bridge rectifier is illustrated in figure 5, is mainly made up of lightning protection circuit and bridge rectifier.At this
In inventive embodiments, because overhead ground wire mainly plays lightning protection, thus corresponding lightning protection module must be designed, protection
Energy equipment is taken not by broken by lightning.Lightning protection module is mainly by lightning-arrest decoupler, TVS, piezo-resistance three-level lightning protection structure
Into.Illustrate by taking 8/20us-100KA thunder and lightning waveforms as an example.When overhead ground wire is struck by lightning by 8/20us-100KA, due to mutual inductance
Module and overhead ground wire do not have energy that is direct-connected, but coming by magnet sensing, then reach the induced-current of mutual inductor
For：
In formula, IETo reach the induced-current of mutual inductor, I is thunder-strike current, N1For mutual inductance module primary turns, N2For
Mutual inductance module number of secondary turns.The mutual inductance module secondary winding turns that we are set are 50 circles, thus enter the thunder of power taking equipment
Hit electric current and there was only 2KA.Thunder-strike current of this thunder-strike current after first order lightning protection takes shelter from the thunder decoupler out is less than 2KA；Make
For two level lightning protection device, the lightning protection phasmajector T1 selected by us is high-power lightning protection component, can bear 8/20us ripples
Shape maximum current is 6KA, fully meets above-mentioned design requirement；And rear end parallel connection piezo-resistance as three-level lightning protection to suppress
Residual voltage, so as to effectively prevent from causing to damage to circuit devcie below.The alternating voltage that mutual inductance module senses to obtain is through bridge rectifier
Obtain DC voltage VA.
In embodiments of the present invention, by the line loss energy of overhead ground wire takes energy equipment to take energy big compared to us
Much, thus overhead ground wire induced-current can be reduced to as a constant-current source theoretical model.
Now transmission power is：
P0=I2r
P is transmission power in formula, and I is overhead ground wire induced-current, and r is overhead ground wire equivalent internal resistance；It is assuming that online
The static power of monitoring device is P1, rated power P2, overhead ground wire induced-current I, general silicon steel material iron core it is full
It is B with magnetic induction intensityS, then the iron core cross-sectional area of mutual inductance module can be determined.According to overhead ground wire correlation standard,
For the basic standard of load mutual inductance modular device weight and volume, so as to obtain determining the quantity of installation mutual inductance module.It is single mutual
Feeling module iron core peak power output is：
P in formulaSFor iron core peak power output, S accumulates for core section, and K is empirical coefficient.Wherein empirical coefficient K according to
Following table value：
| PS(W) | 0-10 | 10-50 | 50-500 | 500-5000 | More than 5000 |
| K | 2 | 1.75 | 1.4 | 1.2 | 1 |
K values take 1 calculating P firstS, then according to PSTake K to be worth and recalculate P againS, after computing repeatedly 10 times, the P of calculatingS
Value is that (iron core peak power output have to be larger than rated power P to iron core peak power output2).We then can be according to this formula
Retrodict core section product S.
According to overhead ground wire induced-current I, core section product S, then can be worked as by changing turn number N to find
Preceding maximum power point Pm, V that mutual inductance module senses to obtain under the conditions of this number of turn voltage obtains through bridge rectifierAValue is V1；When
The timing of overhead ground wire induced-current one, by rectification filtering module and overcurrent protection module by mutual inductor output voltage VAControl
System is in V1Near, so as to obtain the maximum power output that current induced electricity flow valuve can be provided.
As shown in fig. 6, the circuit is current foldback circuit, it is made up of protection circuit and acquisition control circuit two parts.Protect
Protection circuit is mainly by controllable silicon Q1, controllable silicon driving chip U1, triode Q3Composition, acquisition control circuit is mainly by voltage monitoring
Chip U2And its peripheral circuit is formed.VAFor the DC voltage after mutual inductance modules A C-DC rectifications, and the input of DC-DC module
Voltage, OUTAFor the input control signal of acquisition control circuit output control signal, and protection circuit, SA1、SA2For mutual inductance mould
The alternating voltage that block senses.When overhead ground wire induced-current is excessive, VAAlso rise therewith, as voltage monitoring chip U2Prison
Measure VAMore than V1When, a drive signal OUT can be exportedA, then Q in protection circuit3Conducting, controllable silicon driving chip work, drives
Dynamic controllable silicon closure SA1、SA2, mutual inductance module secondary coil short circuit, VAIt is reduced to 0V；Now voltage monitoring chip monitors VAIt is small
In V1, then will not output drive signal OUTA, controllable silicon is stopped, and mutual inductance module secondary coil senses induced voltage again.
Dimension we by controlling the conducting of controllable silicon and closure by VAControl is in V1Near so that energy taking device can obtain peak power
Point.
In embodiments of the present invention, sampling communication module gathers multichannel mutual inductance module inductive voltage value, lithium battery in real time
Amount, and the series of parameters such as load power source on off operating mode, and upload onto the server.Communication module is sampled mainly by front end microcontroller
Processor, back-end server backstage form.Communication module collection mutual inductance module VA analog voltage is sampled, is passed through electric resistance partial pressure
Data signal is converted into microcontrol processor ADC pins, then through analog-to-digital conversion, is most led to afterwards through ftp agreements by gsm wireless
News are transmitted to server background, are easy to us to implement to monitor circuit and the basic running situation of electricity getting device.
In embodiments of the present invention, we by a voltage comparator come monitor electric quantity of lithium battery (voltage value parameter) and
The output voltage of power laminating module 3, so as to the power supply for load of automatically switching.The normal output of power laminating module 3
Voltage is 14.6V, and it is 14.4V that lithium battery is at full charge.Voltage comparator is made up of two diodes in parallel, according to diode
Forward conduction characteristic, when overhead ground wire induced-current energy is enough, power laminating module 3 export 14.6V voltages, be more than
Lithium battery be full of after voltage, be load supplying by power laminating module, and lithium battery only keeps floating punch die formula, to lithium battery
Life-span improves a lot；When overhead ground wire induced-current energy deficiency, then there are power laminating module and lithium battery common
Power supply is provided for load；When due to cause specific line outage, overhead ground wire induced-current is 0, now only by lithium electricity
Pond provides power supply for load.
Pass through the parameters in series such as reasonable disposition core section product, secondary winding turns, battery charging voltage so that power taking fills
Maximum inductive energy can be obtained by putting.It is substantially compared to existing sensing electricity getting device on wire, utilizes phase line electricity
Stream takes energy, and applies in general to architomy wire.And the present invention is then based on overhead ground wire induced-current, it mainly takes can equipment
Installed for ground potential, securely and reliably, except current transformer is nested on overhead ground wire, remaining companion module is mountable to
On steel tower, it is not constrained by weight and volume condition relatively.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (8)
1. one kind utilizes the faradic electricity getting system of overhead ground wire, the steel tower in ultra-high-tension power transmission line is kept away with aerial
On thunder line, it is characterised in that the system includes the electricity getting device being connected with each other and multiple mutual inductance modules, electricity getting device are arranged on iron
On tower, mutual inductance module is arranged on overhead ground wire；Wherein：
Induction module is used to obtain induced-current caused by sensing on overhead ground wire；
Electricity getting device include be sequentially connected lightning protection module, overcurrent protection module, rectification filtering module, sampling communication mould
Block, power termination laminating module and power module；Lightning protection module is used to avoid overhead ground wire from taking by damage when being struck by lightning
Electric installation；Overcurrent protection module is used to prevent that induced-current is excessive and damages electricity getting device on overhead ground wire；Rectifying and wave-filtering mould
Block uses bridge rectifier, and the alternating voltage for mutual inductance module to be got is converted to DC voltage；Communication module is sampled to use
In the electricity of the induced-current size of monitoring overhead ground wire and power module in real time；Power termination laminating module is used for will be multiple
The power that mutual inductance module is got carries out being sent into power module after collecting superposition.
2. according to claim 1 utilize the faradic electricity getting system of overhead ground wire, it is characterised in that per adjacent
3 steel towers are one group, and overhead ground wire is connected between steel tower, an electricity getting system is set on every group of steel tower；The system includes 1
Individual electricity getting device and 4 induction modules, electricity getting device are mounted on the steel tower in 3 steel tower centre positions, induction module pair
Claim to be arranged on the overhead ground wire adjacent with steel tower both sides.
3. according to claim 1 utilize the faradic electricity getting system of overhead ground wire, it is characterised in that lightning protection
The input of module is connected with induction module, and lightning protection module is three-level lightning protection circuit, and three-level lightning protection circuit is included mutually simultaneously
Lightning-arrest decoupler, Transient Suppression Diode and the piezo-resistance of connection；Wherein, taken shelter from the thunder by the first order thunder-strike current after decoupler
Less than 2KA, the Transient Suppression Diode that can bear 8/20us waveform maximum currents 6KA, the pressure-sensitive electricity of the third level are chosen in the second level
Hinder for suppressing residual voltage.
4. according to claim 1 utilize the faradic electricity getting system of overhead ground wire, it is characterised in that overcurrent protection
Module includes protection circuit and acquisition control circuit, controllable silicon that protection circuit includes being sequentially connected, controllable silicon driving chip and
Triode, acquisition control circuit include voltage monitoring chip and peripheral circuit.
5. according to claim 1 utilize the faradic electricity getting system of overhead ground wire, it is characterised in that sampling communication
Module includes the microcontrol processor of front end and the server background of rear end, the simulation electricity of sampling communication module collection mutual inductance module
Pressure value, microcontrol processor ADC pins are reached through electric resistance partial pressure, then data signal is converted into through analog-to-digital conversion, most assisted afterwards through ftp
View, by gsm wireless communication transfer to server background, for monitoring circuit and the basic running situation of electricity getting device in real time.
6. according to claim 1 utilize the faradic electricity getting system of overhead ground wire, it is characterised in that the system is also
Including voltage comparator, voltage comparator is used for the output voltage for monitoring power module electricity and power laminating module, so as to real
Now automatically switch the power supply of load；The voltage of the normal output of power laminating module is 14.6V, and power module is at full charge
For 14.4V；Voltage comparator includes two diodes in parallel, according to the forward conduction characteristic of diode, works as overhead ground wire
When induced-current energy is enough, power laminating module output 14.6V voltages, the voltage after being full of more than power module, by power
Laminating module is load supplying, and power module keeps floating punch die formula；When overhead ground wire induced-current energy deficiency, then have
Power laminating module and power module provide power supply for load jointly；When due to cause specific line outage, overhead ground wire
Induced-current is 0, now only provides power supply by power module for load.
7. a kind of electricity-fetching method using the faradic electricity getting device of overhead ground wire using described in claim 1, it is special
Sign is, comprises the following steps：
S1, the core section product by designing mutual inductance module and coil turn, make mutual inductance module reach maximum power output；
The alternating current flowed through in S2, ultra-high-tension power transmission line produces alternating magnetic field in space, and alternating magnetic field is cut by two framves
The space closure plane of empty lightning conducter and steel tower composition, induction electric is produced by the mutual inductance module being nested on overhead ground wire
Gesture, and then induced-current is produced by the bulk resistor on loop；
The alternating voltage that S3, mutual inductance module sense to obtain obtains DC voltage through bridge rectifier；
S4, the size for monitoring DC voltage, when DC voltage exceedes threshold value, produce high level drive signal and give overcurrent protection mould
Block, overcurrent protection module open overcurrent protection function；When DC voltage is no more than threshold value, after DC voltage is by voltage conversion
It is input to function laminating module；
S5, when overhead ground wire induced-current energy is enough, after power laminating module output voltage is full of more than power module
Voltage, be load supplying by power laminating module, and power module keeps floating punch die formula；When overhead ground wire induced-current energy
When measuring insufficient, then there are power laminating module and power module and provide power supply jointly for load；When due to cause specific line outage
When, overhead ground wire induced-current is 0, now only provides power supply by power module for load.
8. according to claim 7 utilize the faradic electricity-fetching method of overhead ground wire, it is characterised in that in this method
The core section product and coil turn of mutual inductance module are designed, makes mutual inductance module reach the method for maximum power output to be specially：
The peak power output of single mutual inductance module is：
<mrow>
<msub>
<mi>P</mi>
<mi>s</mi>
</msub>
<mo>=</mo>
<mrow>
<mo>(</mo>
<mfrac>
<mi>S</mi>
<mi>K</mi>
</mfrac>
<mo>)</mo>
</mrow>
<mo>*</mo>
<mrow>
<mo>(</mo>
<mfrac>
<mi>S</mi>
<mi>K</mi>
</mfrac>
<mo>)</mo>
</mrow>
</mrow>
Wherein, middle PSFor iron core peak power output, S accumulates for core section, and K is empirical coefficient；Empirical coefficient K values are：Ps is
During 0-10W, K values are 2；When Ps is 10-50W, K values are 1.75；When Ps is 50-500W, K values are 1.4；Ps is 500-
During 5000W, K values are 1.2；When Ps is more than 5000W, K values are 1；
Assuming that rated power needed for load is Pa, rated power reserves 20% surplus, thus now can be by peak power PSIt is arranged to
1.25Pa, according to P nowSValue, corresponding K value is selected, so as to calculate corresponding core section product S；
, then can be by changing turn number N, to find currently most according to overhead ground wire induced-current I, core section product S
High-power point Pm；The VA values that the voltage that mutual inductance module senses to obtain under the conditions of this number of turn obtains through bridge rectifier are V1；Work as frame
The empty timing of lightning conducter induced-current one, is controlled mutual inductor output voltage VA by rectification filtering module and overcurrent protection module
Near V1, so as to obtain the maximum power output that current induced electricity flow valuve can be provided.
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| CN112366833A (en) * | 2020-11-05 | 2021-02-12 | 中国电力科学研究院有限公司 | Power supply device and power supply method using overhead ground wire induction current |
| CN112713663A (en) * | 2020-12-29 | 2021-04-27 | 广东电网有限责任公司中山供电局 | Power taking device for secondary equipment of high-voltage transmission line |
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Application publication date: 20171222 |