CN204721106U - Based on the power transmission line overhead ground wire electromagnetism energy taking device of super capacitor - Google Patents
Based on the power transmission line overhead ground wire electromagnetism energy taking device of super capacitor Download PDFInfo
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- CN204721106U CN204721106U CN201520500243.1U CN201520500243U CN204721106U CN 204721106 U CN204721106 U CN 204721106U CN 201520500243 U CN201520500243 U CN 201520500243U CN 204721106 U CN204721106 U CN 204721106U
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Abstract
The power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor that the utility model provides, comprise surge protection unit and for the processing unit that can be converted to satisfactory direct voltage will be got from circuit, the described output of surge protection unit is connected with the input of processing unit, the first input end mouth of described surge protection unit is connected with overhead ground wire, and the second input port of described surge protection unit is connected with steel tower; The utility model is directly got from the overhead ground wire of ground connection can, not only Insulation Problems can be solved, and be applicable to be positioned at earthy watch-dog, there is good engineer applied be worth, can can limit the adverse effect that ground wire voltage or current fluctuation bring to load supply voltage by large-scale promotion the utility model, ensure use safety simultaneously, simultaneously, adopt super capacitor to load supplying, be the output power and power-on time that load is enough when namely can ensure power-off, also have simultaneously non-maintaining, operating temperature range is wide, the advantages such as long service life.
Description
Technical field
The utility model relates to power domain, particularly relates to a kind of power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor.
Background technology
Distribute improving constantly of requirement along with domestic and international rationally to electrical network self-healing ability and power resource, the concept of novel intelligent electrical network is paid close attention to widely.Based on modern transmission and distribution network can only electrical network.Be based upon integrated with on the communication network platform of high-speed bidirectional, the technology such as the sensing of integrated application advanced person and measurement, computer, microelectronics, power electronics, control and intelligent decision, utilize electrical network real time panoramic information, monitor in real time, catastrophe protection and user interaction, to realize reliable, safety, economy, high-quality, operation of power networks efficiently and sustainable development.Transmission line online monitoring system, as the important component part of intelligent grid power transmission and transformation link, is the important means realizing the management of power transmission and transformation equipment state operating maintenance, promote normal operation lean level.Electric power transmission network covers wide, maintenance workload is large, overhead transmission line is once go wrong and will cause significant impact to national product, and power grid self-healing and adaptive requirement, the state Timeliness coverage needing power department to control transmission line in real time to run, quick diagnosis and elimination potential faults, avoid the generation of large area accident.In this case, just in the urgent need to setting up transmission line online monitoring system, for solid foundation is established in the reliability service of transmission line and maintenance in time.
Overhead transmission line on-line monitoring technique, relative manual inspection has continuously, reflect the advantages such as transmission line status information in time, according to the preliminary statistics, transmission line on-line monitoring technique is widely used in the remote transfer signal relay in monitoring system at present both at home and abroad, shaft tower tilts, lead, uniaxial stress, the fields such as route inspecting robot.On-line monitoring device for transmission line is arranged on field, by the restriction of geographical conditions or insulation conditions, its power supply generally directly can not be supplied by low-pressure end, also there is the problem of various Technological Economy aspect in existing supply power mode, greatly develop the trend of intelligent grid in China under, fully cannot meet the power demands of on-Line Monitor Device.According to a statistics of Sichuan province, the transmission line on-line monitoring fault caused because of electricity shortage accounts for more than 40% of total failare.Energy supply problem has become the bottleneck that restriction transmission line on-line monitoring technique further develops.
Getting of current power transmission circuit on-Line Monitor Device can mode have: solar energy+storage battery, wind energy+storage battery, transmission line get energy etc. online.
Wherein, solar electric power supply system generally comprises silicon solar cell, batteries and charge-discharge control circuit three parts.Silicon solar cell only could generate electricity when illumination, do not possess the ability of preserving electric energy, exporting to obtain stable power supply, guaranteeing to power to the load incessantly, need storage battery and silicon solar cell is connected in parallel (silicon solar cell charges to battery).When illumination is sufficient, silicon solar cell one side powers to the load, and one, in the face of charge in batteries, is then powered to the load by storage battery during illumination deficiency.Storage battery can select lead acid accumulator, lithium battery, Ni-MH battery and nickel iron cell.The control conversion of solar electric power supply system different operating state and corresponding management strategy are realized by SCM Based charge-discharge control circuit.The existing life of storage battery is all relevant with the number of times of charge and discharge cycles, charges under normal voltage and normalized current, and cycle-index is generally between 600-1000 time, i.e. 2-3.The storage battery that must more renew after 2-3 in theory, this concerning must long-term stability operate in outdoor high-voltage end online equipment be inconvenient.In addition, consider from the general characteristic of storage battery, the capacity of battery reduces with the reduction of temperature, lead-acid battery particularly shows, the maximum operating temperature of ni-mh and nickel iron cell must not more than 40 DEG C, and the price is rather stiff of jumbo lithium battery, by cost and appearance quantitative limitation, be not suitable for being used as Large Copacity electric energy storage device.Simultaneously, solar cell for supplying power power directly depends on the area of cell panel and the capacity of storage battery, and power requirement larger cell panel volume is also larger, and this is unfavorable for installing, and power supply quality is subject to climatic influences, under the weather conditions that the many wet weather in south are foggy, output power is obviously not enough.
Powered by wind energy system generally comprises small-sized fan, batteries and charge-discharge control circuit three parts.Blower fan only could generate electricity when there being wind, does not preserve the ability of electric energy, so in order to power to load stabilization, also needs to add storage battery, introduces Power Management Unit.When wind is large, blower fan not only powers to the load, but also to charge in batteries.When calm or blower fan power output is too low, battery discharging, to load energy supply.When adopting wind energy to power to equipment, the output power of blower fan depends on local weather conditions, time windy, blower fan can be powered to load stabilization, when in calm season or the less place of wind-force, powered by wind energy less stable, therefore powered by wind energy also has region and restriction in season.
Transmission line get online can, comprise based on Coulomb electric field principle and can mode based on getting of electromagnetic induction principle.The former need to adopt high voltage potential transformer directly from high-voltage conducting wires get can, but due to high-voltage mutual inductor device volume comparatively large, be unfavorable for wire insulation against ground, this mode seldom adopts.Can mode based on getting online of electromagnetic induction principle, be divided into again based on wire and get energy method based on ground wire.Energy mode of getting online based on wire is employing one, and special current transformer (current transformer, CT) obtains required energy from hv transmission line.This instrument transformer be different from common those of electric power system for measuring, the CT of measuring instrument and relaying protection, do not require to keep enough progress of disease precision, do not require secondary circuit short-circuit yet, also very low to progress of disease required precision, as long as can enough energy be transmitted.When adopting CT induction energy fetching from circuit, high-voltage conducting wires overcoat annular magnetic conductor, obtains energy by electromagnetic induction, this get can mode to have volume little, convenient for installation and maintenance, the simple advantage of insulation-encapsulated.But due to insulation reason, this supervising device got energy mode and be only applicable to be arranged on high-voltage conducting wires.In addition, this mode is comparatively large by the impact of power network current, exists " getting energy dead angle "; Finally, during instrument transformer insulation damages, not only can not play buffer action, on the contrary can to secondary side equipment or system, and personal safety brings fatal harm.Get energy method online based on ground wire, mainly contain at present by CT get can method, and utilize two overhead ground wires composition closed-loop paths on circuit to obtain faradic method.The method that the former adopts is identical with the above-mentioned energy method of getting based on wire, and there is not corresponding shortcoming, is that a kind of up-and-coming getting online can mode.Problem is that ground line current is usually less, and it is also very little that CT gets energy power, unless CT size is very large, but excessive size will inevitably bring other risk.For a kind of rear method, also being that one is reasonable gets energy method online, general do not exist that get can under powered problem, but current energy taking device design is all generally based on storage battery and lithium battery combination, and the two all exists life-span and the not good defect of maintainability; Discuss in extremely indivedual document and can design based on getting of super capacitor, but its application is wire gets energy, need two super capacitors, be respectively used to energy storage and direct energy supply, control circuit more complicated, and still need to use lithium battery, there is maintainability and the useful life of damage device entirety.
Utility model content
In view of this, the utility model provides a kind of power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor to solve the problem.
The power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor that the utility model provides; comprise surge protection unit and for the processing unit that can be converted to satisfactory direct voltage will be got from circuit; the described output of surge protection unit is connected with the input of processing unit; the first input end mouth of described surge protection unit is connected with overhead ground wire, and the second input port of described surge protection unit is connected with steel tower.
Further; described processing unit comprises filter circuit, isolating transformer and rectification circuit; described filter circuit comprises the first filter; the input of described first filter is connected with surge protection unit; the described output of the first filter is connected with the input of isolating transformer, and the output of described isolating transformer is connected with rectification circuit.
Further, described filter circuit also comprises the second filter, described rectification circuit comprises rectifier bridge, rectifier bridge, rectifier output voltage control unit and current transformer, the output of described isolating transformer is connected with the input of rectifier bridge, the output of described rectifier bridge is connected with the input of the second filter, the output of described second filter is connected with the input of rectifier output voltage control unit and is used for regulating the direct voltage that rectifier bridge exports, and the described output of rectifier output voltage control unit is connected with the input of current transformer.
Further, also voltage stabilizing didoe is parallel with between described isolating transformer and rectifier bridge.
Further, also comprise super capacitor, described super capacitor is connected with the output of current transformer by switch.
Further, also comprise the electric capacity monitoring unit for controlling described switch on and off, described electric capacity monitoring unit is connected with the output of current transformer.
Further, described surge protection unit comprises lightning arrester and surgesuppressor, is serially connected with inductance between described lightning arrester and surgesuppressor.
The beneficial effects of the utility model: the utility model directly gets energy from the overhead ground wire of ground connection, not only can solve Insulation Problems, and be applicable to be positioned at earthy watch-dog, have good engineer applied and are worth, can large-scale promotion.For thunder and lightning and the protector operating wave impact, filter, isolating transformer, and ensure DC-DC current transformer input rectifier bridge output voltage control unit in the reasonable scope, there is good voltage stabilizing function simultaneously, be conducive to limiting the adverse effect that ground wire voltage or current fluctuation bring to load supply voltage, ensure use safety simultaneously.Adopting super capacitor to load supplying, is the output power and power-on time that load is enough when namely can ensure power-off, also have simultaneously non-maintaining, operating temperature range is wide, the advantages such as long service life.Rectifier bridge voltage output control unit ensures the input of DC-DC current transformer in the reasonable scope, ensures Primary Component DC-DC current transformer reliably working; Once exceed the requirement of super capacitor, then exit super capacitor module and by current transformer, load directly powered, ensureing super capacitor reliably working.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is principle schematic of the present utility model.
Fig. 2 is the circuit diagram of rectification output control unit of the present utility model.
Embodiment
Be further described the utility model below in conjunction with drawings and Examples: Fig. 1 is principle schematic of the present utility model, Fig. 2 is the circuit diagram of rectification output control unit of the present utility model.
As shown in Figure 1; the power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor that the utility model provides; comprise surge protection unit and for the processing unit that can be converted to satisfactory direct voltage will be got from circuit; the described output of surge protection unit is connected with the input of processing unit; the first input end mouth 1 of described surge protection unit is connected with overhead ground wire, and the second input port 2 of described surge protection unit is connected with steel tower.First input end mouth 1 and the second input port 2 are by connecing connection segment insulated static wire and steel tower respectively with ground insulator; charge protection unit is used for the protection of lightning impulse and switching impulse ripple; energy taking device is got from circuit by input port can; after surge protection unit and processing unit processes, the satisfactory direct voltage of final output.
In the present embodiment; processing unit comprises filter circuit, isolating transformer and rectification circuit; described filter circuit comprises the first filter; the input of described first filter is connected with surge protection unit; the described output of the first filter is connected with the input of isolating transformer, and the output of described isolating transformer is connected with rectification circuit.Filter circuit also comprises the second filter, described rectification circuit comprises rectifier bridge, rectifier bridge, rectifier output voltage control unit and current transformer, the output of described isolating transformer is connected with the input of rectifier bridge, the output of described rectifier bridge is connected with the input of the second filter, the output of described second filter is connected with the input of rectifier output voltage control unit and is used for regulating the direct voltage that rectifier bridge exports, and the described output of rectifier output voltage control unit is connected with the input of current transformer.Voltage stabilizing didoe D is also parallel with between isolating transformer and rectifier bridge.First filter is connected with the output of surge protection unit, and its basic function is logical power frequency, resistance high frequency.Consider that the distortion of ground wire induced current is relatively more serious, the first filter adopts bipolar filter.First filter also connects a 1:1 isolating transformer, and described isolating transformer is 1:1 isolating transformer, to realize the electrical isolation of subsequent conditioning circuit and on-line monitoring equipment, and support equipment and personal safety.Afterwards and meet a voltage stabilizing didoe D, suppress High-frequency Interference further, then and connect a rectifier bridge, preferably, after rectifier bridge rectification, connect second filter again, filtered alternating voltage be converted to direct voltage.The amplitude of this direct voltage and Line Flow etc. are closely related, in order to ensure that this magnitude of voltage is within the input range of follow-up current transformer, rectifier output voltage control unit is set after rectifier bridge, i.e. rectifier bridge voltage output control unit, make rectifier bridge output voltage meet the input requirements of current transformer, current transformer adopts DC-DC current transformer in the present embodiment.
In the present embodiment, energy taking device also comprises electric capacity monitoring unit, and described electric capacity monitoring unit is connected with super capacitor, is provided with switch S between described electric capacity monitoring unit and super capacitor
1.Switch S
1break-make control to be determined by CMU (super capacitor monitoring unit), CMU adopts CE8808 chip monitoring DC-DC output voltage.When voltage is normal, the switching of CMU control switch makes load (watch-dog) by C
0power supply.Voltage or C
0when temperature exceedes setting, then control load is directly powered by current transformer.In view of the operating voltage of monomer super capacitor (lower than 3V) on the low side, storage power are limited, there is voltage-sharing in combination of monomers, the preferred commercial super capacitor module of this case, its rated output voltage should a little more than DC-DC output voltage, to ensure the normal use of super capacitor.The output control switch S of super capacitor
1, then the switch with load-bearing capacity is adopted.
In the present embodiment, rectification output control unit (ROCU) is the size according to rectifier bridge output voltage, its voltage inputing to the input of DC/DC current transformer is controlled in suitable scope by arranging three points of pressure sides, mainly contain divider resistance RW1, RW2, resistance R1, R2, R3, K switch 1, K2, K3 and UMU (rectifier bridge output voltage monitoring unit) is formed, RW1 and RW2 forms voltage divider, is convenient to UMU and measures the second filter output voltage, and UMU is according to the break-make of measurement result control switch K1 ~ K3 simultaneously.When described rectifier bridge output voltage is in the normal range (NR) set, K2 connects, and other two switches disconnect; When described rectifier bridge output voltage is lower than lower limit set value, K1 connects, and other two switches disconnect; When described rectifier bridge output voltage is higher than upper limit set value, K3 connects, and other two switches disconnect.
In the present embodiment, surge protection unit comprises lightning arrester and surgesuppressor, is serially connected with inductance between described lightning arrester and surgesuppressor.Be serially connected with inductance between described lightning arrester and surgesuppressor, surge protection unit forms by 2 grades, the first order be near overhead ground wire side for lightning arrester, most of energy of the lightning surge that is mainly used in releasing; The second level is SPD (surgesuppressor), coordinates with lightning arrester, for remaining impact energy of releasing.For the protection of switching impulse surge, replace with the SPD protected for lightning impulse.But its nominal current is greater than the switching impulse current value of equal peak value, preferably the nominal current of more than 3 times.In addition, between the first order and the second level, being also in series with inductance, flowing to second level protective device for limiting lightning current, strengthen protected effect.SPD adopts the low voltage single-pole product with short-circuit protection function, and in order to protect the surge under lightning impulse and switching overvoltage, its nominal current selects wherein the greater according to lightning impulse and switching impulse current peak value.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (7)
1. the power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor; it is characterized in that: comprise surge protection unit and for the processing unit that can be converted to satisfactory direct voltage will be got from circuit; the described output of surge protection unit is connected with the input of processing unit; the first input end mouth of described surge protection unit is connected with overhead ground wire, and the second input port of described surge protection unit is connected with steel tower.
2. the power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor according to claim 1; it is characterized in that: described processing unit comprises filter circuit, isolating transformer and rectification circuit; described filter circuit comprises the first filter; the input of described first filter is connected with surge protection unit; the described output of the first filter is connected with the input of isolating transformer, and the output of described isolating transformer is connected with rectification circuit.
3. the power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor according to claim 2, it is characterized in that: described filter circuit also comprises the second filter, described rectification circuit comprises rectifier bridge, rectifier bridge, rectifier output voltage control unit and current transformer, the output of described isolating transformer is connected with the input of rectifier bridge, the output of described rectifier bridge is connected with the input of the second filter, the output of described second filter is connected with the input of rectifier output voltage control unit and is used for regulating the direct voltage that rectifier bridge exports, the described output of rectifier output voltage control unit is connected with the input of current transformer.
4. the power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor according to claim 3, is characterized in that: be also parallel with voltage stabilizing didoe between described isolating transformer and rectifier bridge.
5. the power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor according to claim 1, it is characterized in that: also comprise super capacitor, described super capacitor is connected with the output of current transformer by switch.
6. the power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor according to claim 5, is characterized in that: also comprise the electric capacity monitoring unit for controlling described switch on and off, described electric capacity monitoring unit is connected with the output of current transformer.
7. the power transmission line overhead ground wire electromagnetism energy taking device based on super capacitor according to the arbitrary claim of claim 1-6; it is characterized in that: described surge protection unit comprises lightning arrester and surgesuppressor, is serially connected with inductance between described lightning arrester and surgesuppressor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520500243.1U CN204721106U (en) | 2015-07-10 | 2015-07-10 | Based on the power transmission line overhead ground wire electromagnetism energy taking device of super capacitor |
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| CN201520500243.1U CN204721106U (en) | 2015-07-10 | 2015-07-10 | Based on the power transmission line overhead ground wire electromagnetism energy taking device of super capacitor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040144A (en) * | 2017-04-28 | 2017-08-11 | 新疆天成鲁源电气工程有限公司 | Energy taking device and seal based on capacitive divider |
| CN109066825A (en) * | 2018-09-21 | 2018-12-21 | 福州大学 | 220kV transmission line insulator lightning conducter based on Switching Power Supply takes can method |
| CN109358227A (en) * | 2018-12-06 | 2019-02-19 | 石家庄杰泰特动力能源有限公司 | A kind of resonance mutual inductance energy taking device for power network monitoring |
| CN113224802A (en) * | 2021-05-20 | 2021-08-06 | 贵州电网有限责任公司 | Ground wire energy taking and storing device and method based on electromagnetic induction |
-
2015
- 2015-07-10 CN CN201520500243.1U patent/CN204721106U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040144A (en) * | 2017-04-28 | 2017-08-11 | 新疆天成鲁源电气工程有限公司 | Energy taking device and seal based on capacitive divider |
| CN109066825A (en) * | 2018-09-21 | 2018-12-21 | 福州大学 | 220kV transmission line insulator lightning conducter based on Switching Power Supply takes can method |
| CN109358227A (en) * | 2018-12-06 | 2019-02-19 | 石家庄杰泰特动力能源有限公司 | A kind of resonance mutual inductance energy taking device for power network monitoring |
| CN113224802A (en) * | 2021-05-20 | 2021-08-06 | 贵州电网有限责任公司 | Ground wire energy taking and storing device and method based on electromagnetic induction |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151021 Termination date: 20160710 |