CN201499006U - Power supply for on-line monitoring system of transmission line - Google Patents

Power supply for on-line monitoring system of transmission line Download PDF

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Publication number
CN201499006U
CN201499006U CN2009203052799U CN200920305279U CN201499006U CN 201499006 U CN201499006 U CN 201499006U CN 2009203052799 U CN2009203052799 U CN 2009203052799U CN 200920305279 U CN200920305279 U CN 200920305279U CN 201499006 U CN201499006 U CN 201499006U
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China
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resistance
pin
voltage stabilizing
stabilizing didoe
power supply
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Expired - Lifetime
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CN2009203052799U
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Chinese (zh)
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黄新波
程荣贵
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Xi'an Jin Power Electrical Co., Ltd.
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Xian Polytechnic University
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model relates to a power supply for an on-line monitoring system of a transmission line, which comprises a solar battery, a charge-discharge protection and control circuit and a voltage regulator which are connected sequentially. The charge-discharge protection and control circuit is respectively connected with a power dog, a storage battery and a battery test and control circuit. The storage battery is connected with the battery test and control circuit. The power supply of the utility model provides stable and continuous electrical energy for on-line monitoring of the outdoor transmission line, has functions of the power dog, has low power consumption and high efficiency, and guarantees the stability and reliability of long-term work of the on-line monitoring system of the transmission line.

Description

The transmission line online monitoring system power supply
Technical field
The utility model belongs to the microelectronics power technique fields, relates to a kind of transmission line online monitoring system power supply.
Background technology
Power supply is an indispensable important component part in the transmission line online monitoring system, and the quality of power supply is directly connected to whole monitoring system long term operation stability and reliability.
Transmission line online monitoring system generally is installed under the condition of outdoor no mains supply, and can only adopt solar energy or high-voltage conducting wires to get supply power mode such as energy is this monitoring system power supply.But solar energy and high-voltage conducting wires are got energy, and the electric energy of generation is interrupted, instability, especially solar energy, has only in the sun, could produce electric energy, can not guarantee monitoring system long term operation stability and reliability.
The utility model content
The purpose of this utility model provides a kind of transmission line online monitoring system power supply, the electric energy of continous-stable is provided for transmission line online monitoring system, guarantee the reliability and stability of monitoring system long-term work, and have the power consumption low, the characteristics that efficient is high.
The technical scheme that the utility model adopted is; the transmission line online monitoring system power supply; comprise solar cell, charge and discharge protecting and the control circuit and the pressurizer that connect successively; charge and discharge protecting and control circuit are connected with the control signal output circuit with power supply dog, storage battery and battery detecting respectively, and storage battery is connected with the control signal output circuit with battery detecting.
The utility model power supply has the following advantages:
1. the power supply plan that adopts solar panel and batteries to store energy to combine has solved outdoor transmission line online monitoring system powerup issue.
2. storage battery detects and charge-discharge protection circuit is simple in structure, precise control, safe and reliable.
3. adopt the power supply dog, prevent Single Chip Microcomputer (SCM) system deadlock phenomenon, guaranteed that monitoring system can work reliably and with long-term.
4. have low-power consumption, high efficiency, high stable characteristics.
Description of drawings
Fig. 1 is the structural representation of the utility model power supply;
Fig. 2 is the structural representation of charge and discharge protecting and control circuit in the utility model power supply;
Fig. 3 is the structural representation of battery detecting and control signal output circuit in the utility model power supply;
Fig. 4 is the structural representation of power supply dog in the utility model power supply;
Fig. 5 is the structural representation of pressurizer in the utility model power supply.
Among the figure, 1. solar cell, 2. charge and discharge protecting and control circuit, 3. power supply dog, 4. pressurizer, 5. storage battery, 6. battery detecting and control signal output circuit, 7. active device, 8.DC/DC regulated converter.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Because the particularity of transmission line online monitoring system installation environment has higher requirement to power supply: 1) the necessary low power consuming of power supply itself, high efficiency, to prolong overcast and rainy on-line monitoring system stream time and battery useful life; 2) have advantages of higher stability and reliability, improve the performance index of power supply as far as possible; 3) improve the antijamming capability of monitoring system, guarantee the reliability of system's long-term work.
The utility model power supply adopts the circuit structure that can satisfy above-mentioned requirements, has solved electric energy interruption, problem of unstable that existing transmission line online monitoring system power supply exists.
The structure of the utility model power supply; as shown in Figure 1; comprise solar cell 1, charge and discharge protecting and the control circuit 2 and the pressurizer 4 that connect successively; charge and discharge protecting and control circuit 2 are connected with control signal output circuit 6 with power supply dog 3, storage battery 5 and battery detecting respectively, and storage battery 5 is connected with control signal output circuit 6 with battery detecting.Storage battery 5 adopts special solar energy storage battery or other rechargeable batteries.
Structure in this power supply, as shown in Figure 2, comprise the parallel circuits that solar cell 1, piezo-resistance MYG20 and switching tube MOSFET1 form, one end of this parallel circuits, the i.e. drain electrode of the end of the positive pole of solar cell 1, piezo-resistance MYG20, switching tube MOSFET1 respectively with voltage stabilizing didoe VD 1Positive pole be connected voltage stabilizing didoe VD 1Negative pole be connected with pressurizer 4 with the positive pole of storage battery 5, an end of resistance R respectively, the other end of resistance R respectively with positive pole, the voltage stabilizing didoe VD of voltage stabilizing didoe VD3 2Positive pole and the grid of switching tube MOSFET2 be connected, the source electrode of the negative pole of solar cell 1, the other end of piezo-resistance MYG20, switching tube MOSFET1 is connected with the source electrode of switching tube MOSFET2 respectively with the negative pole of storage battery 5, and the drain electrode of switching tube MOSFET2 is connected with pressurizer 4 output ground.
The structure of battery detecting and control signal output circuit 3 in the utility model power supply as shown in Figure 3, comprises the resistance R of series connection 1And resistance R 2, resistance R 1The other end respectively with voltage VD (battery positive voltage), resistance R 3And resistance R 5Be connected resistance R 3With resistance R 4Series connection, resistance R 5With voltage stabilizing didoe VD 1Series connection, resistance R 5With voltage stabilizing didoe VD 1Negative pole be connected resistance R 2, resistance R 4With voltage stabilizing didoe VD 1Positive pole ground connection respectively.Resistance R 1And resistance R 2Between bypass respectively with resistance R F1An end and the positive input of comparator A1 be connected the output of comparator A1 and resistance R 6Series connection, resistance R 6The other end respectively with resistance R F1The other end, voltage stabilizing didoe VD 2Negative pole and charge and discharge protecting and control circuit 2 in the grid of switching tube MOSFET1 be connected voltage stabilizing didoe VD 2Plus earth.The reverse input end of comparator A1 is connected with the reverse input end of comparator A2, the reverse input end of the reverse input end of comparator A1 and comparator A2 also with resistance R 5With voltage stabilizing didoe VD 2Between bypass be connected; The positive input of comparator A2 respectively with resistance R 3And resistance R 4Between bypass and resistance R F2An end be connected, the output of comparator A2 is in series with resistance R 7, resistance R 7The other end respectively with resistance R F2The other end, voltage stabilizing didoe VD 3Negative pole and charge and discharge protecting and control circuit 2 in voltage stabilizing didoe VD 2Negative pole be connected voltage stabilizing didoe VD 3Plus earth.
Voltage stabilizing didoe VD in charge and discharge protecting and the control circuit 2 1When being used to prevent from not have sunlight, 1 discharge of 5 pairs of solar cells of storage battery.Piezo-resistance MYG20 (also optional Transient Suppression Diode) is used for anti-lightning strike protection, voltage stabilizing didoe VD 2, voltage stabilizing didoe VD 3Constitute gate circuit with resistance R.Switching tube MOSFET1 is used for charging control, and during switching tube MOSFET1 conducting, 1 pair of storage battery 5 of solar cell stops charging; When switching tube MOSFET1 ended, 1 pair of storage battery 5 of solar cell charged normal.Switching tube MOSFET2 is used for discharge control, during switching tube MOSFET2 conducting, and 5 pairs of loads of storage battery (pressurizer 4) normal power supply.When switching tube MOSFET2 ended, storage battery 5 stopped for discharge.Switching tube MOSFET1 and switching tube MOSFET2 are controlled by battery detecting and comparison circuit, and MOSFET2 also is subjected to 3 controls of power supply dog simultaneously.
Comparator A1 and comparator A2 in battery detecting and the control signal output circuit 6 detect and control storage battery 5.Resistance R 5With voltage-stabiliser tube VD 1For comparator A1 and comparator A2 provide reference voltage, resistance R 6, voltage stabilizing didoe VD 2, resistance R 7With voltage stabilizing didoe VD 3Be respectively comparator A1 and comparator A2 stable high level output is provided.The output of comparator A1 passes through resistance R 6Be connected with the grid of switching tube MOSFET1 in charge and discharge protecting and the control circuit 2, i.e. 1. end among Fig. 2; The output of comparator A2 passes through resistance R 7With the voltage stabilizing didoe VD in charge and discharge protecting and the control circuit 2 2Negative pole be connected i.e. 2. end among Fig. 2.Its operation principle is as follows: the voltage of storage battery 5 just often passes through resistance R 1And resistance R 2Dividing potential drop makes voltage U 1Be lower than reference voltage U REF, comparator A1 is output as low level, and at this moment, switching tube MOSFET1 ends, voltage stabilizing didoe VD 1Conducting, 1 pair of storage battery 5 of solar cell charges normal.Pass through resistance R 3And resistance R 4Dividing potential drop makes voltage U 2Be higher than reference voltage U REF, at this moment, comparator A2 exports high level, switching tube MOSFET2 conducting, storage battery 5 regular pictures.When the voltage rising of storage battery 5, when reaching its additives for overcharge protection value, voltage U 1Be higher than reference voltage U REF, at this moment, comparator A1 exports high level, and switching tube MOSFET1 conducting, the output that makes solar cell 1 be by short circuit, voltage stabilizing didoe VD 1End, solar cell 1 stops storage battery 5 chargings are realized the additives for overcharge protection of storage battery 5.After this, have only the voltage of storage battery 5 to reduce, and be lower than one of additives for overcharge protection value and fight and die young behind the scandium Dao, switching tube MOSFET1 ends again, voltage stabilizing didoe VD 1Conducting, circuit recover to charge normal.This is fought and dies young scandium Dao as requested, passes through resistance R F1, resistance R 1And reference voltage U REFDetermine.
When the voltage reduction of storage battery 5 reaches its over value, voltage U 2Be lower than reference voltage U REF, comparator A 2Output low level makes voltage stabilizing didoe VD 2Conducting, the grid that makes switching tube MOSFET2 are that low level is ended, and storage battery 5 stops discharge, have realized the over of storage battery 5.After this, have only the voltage of storage battery 5 to raise, and be higher than one of over value and fight and die young behind the scandium Dao comparator A 2The output high level, switching tube MOSFET2 conducting again, circuit recovers regular picture again.This is fought and dies young scandium Dao as requested, passes through resistance R F2, resistance R 3And reference voltage U REFDetermine.
As shown in Figure 4, the structure of power supply dog 3 comprises in the utility model power supply: the pin φ of active device 7 0, pin φ 0And pin φ 1Be connected with capacitor C 1, resistance R 1 and resistance R 2 respectively, capacitor C 1, resistance R 1 and resistance R 2 interconnect.The pin VSS ground connection of active device 7, the pin RST of active device 7 is connected with the negative pole of diode D1, and the positive pole of diode D1 is connected with the positive pole of diode D2, the positive pole of diode D3 and an end of resistance R 3 respectively; The negative pole of diode D2 is connected with the pin Q14 of active device 7, the negative pole of diode D3 is connected with the pin Q5 of active device 7, the other end of resistance R 3 is connected with+VD voltage, the pin VDD of active device 7 and an end of resistance R 5 respectively, the other end of resistance R 5 respectively with the collector electrode of triode and battery detecting and control circuit 6 in voltage stabilizing didoe VD 3Negative pole be connected, the grounded emitter of triode, the base stage of triode is connected with an end of resistance R 4, the other end of resistance R 4 is connected with the negative pole of diode D2 and the pin Q14 of active device 7 respectively.Active device 7 adopts CD4060.
The circuit of power supply dog 3, the self-loopa timing controlled of forming by active device 7 and external circuit realizes.Resistance R 1, resistance R 2 and capacitor C 1 are formed oscillation circuit, the period T=2.2C of this oscillation circuit 1R 1Resistance R 3, resistance R 5Form drive circuit with triode C9013, the conducting of control switch pipe MOSFET2 with end, with the connecting and disconnecting of control power supply.Diode D1, diode D2, diode D3 and resistance R 4 constitute gate circuit, for active device 7 reset terminals (12 pin) provide gate-control signal, are used for the control that resets of active device 7, realize that self-loopa regularly.The working power of power supply dog 3 is the power supply of storage battery 5.
Energized, 12 pin of active device 7 reset because of high level, and the Q4 of active device 7～Q14 pin is output as zero, and binary counter begins counting, and the trailing edge of previous stage triggers the back level, carries out frequency division counter.Can obtain corresponding frequency of oscillation by the parameter of selecting capacitor C 1 and resistance R 1.The logical time of the turn-on time of mains switch and disconnection can correspondingly change.Simultaneously, can change the output end voltage U of active device 7 pin Q14 according to different needs AThe control U that resets with pin Q4 BAlso can change the turn-on time of mains switch and disconnect the logical time.
Because timing is longer.As every day (24 hours) once, selecting Q14 (3 pin) is output control terminal, be T the turn-on time of establishing power supply 1, then:
T 1=2 13T=24 (hour)=24 * 3600 seconds,
Can calculate:
T=24 * 3600/2 13=10.5 seconds.
Select R 1=2M Ω, C 1=2.39 μ F (using CBB electric capacity), R 2=3M Ω.
Power-off time T 2By the control gate decision that resets, diode D3 is connected to Q4 end (7 pin), the then T of source device 7 1=2 3T=84 second is if meet Q5 (5 pin), then: T 2=168 seconds.
Self-loopa period T=T 1+ T 2
Triode C9013, resistance R 4 and resistance R 5 constitute anti-phase drive circuit, and the output of this drive circuit connects voltage stabilizing didoe VD in charge and discharge protecting and the control circuit 2 3Negative pole, i.e. 3. end among Fig. 2.At T 1Output high level in time, diode VD 3End, switching tube MOSFET2 conducting, the power connection normal power supply is at T 2Be output as low level in time, diode VD 3Conducting, the grid of switching tube MOSFET2 are that low level is ended, the load outage.Thereby realize the reseting procedure control the monitoring system power cut-off once a day, power on again, because of the Qian door screen Mai phenomenon that strong jamming causes, guarantee the Single Chip Microcomputer (SCM) system reliably working to prevent single-chip microcomputer in the monitoring system.
The structure of pressurizer 4 in the utility model power supply, as shown in Figure 5, comprise DC/DC regulated converter 8, pin+the VIN of DC/DC regulated converter 8 is connected with the voltage of pin 6, capacitor C 1 and the 5.5V～11.5V of DC/DC regulated converter 8 respectively, the pin OUT of DC/DC regulated converter 8 is connected with the negative pole of diode D1 and an end of inductance L 1 respectively, the other end of inductance L 1 is connected with capacitor C 2 with the pin FB of DC/DC regulated converter 8 respectively, simultaneously, and output+5V voltage; The positive pole of the pin GND of capacitor C 1, DC/DC regulated converter 8, the pin ON of DC/DC regulated converter 8, diode D1 and capacitor C 2 be ground connection respectively.
Single supply, duplicate supply or multiple power supplies are adopted in the output of pressurizer 4.
Pressurizer 4 adopts the integrated Voltage stabilizing module of high efficiency, for the Single Chip Microcomputer (SCM) system in the on-line monitoring system provides+the 5V power supply.DC/DC regulated converter 8 adopts switching mode buck regulated converter MAX639.When input voltage be+5.5V～+ during 11.5V, voltage stabilizing is output as 5V, output current is 100mA, maximum can reach 225mA.The pressure drop of MAX639 own is 0.5V only, and power supply conversion efficiency can reach more than 90%.Diode D1 is a fly-wheel diode, and capacitor C 1 is an input filter capacitor, and inductance L 1 and capacitor C 2 are formed output filter.
The course of work of the utility model power supply:
This power supply is installed on transmission line online monitoring system; solar cell 1 absorbs sunlight and produces electric energy; and with the power delivery that produces to charge and discharge protecting and control circuit 2; accumulators 5 charges and discharge on the one hand; on the other hand by electricity charge and discharge the protection and control circuit 2 in discharge control switch pipe MOSFET2; electric energy is imported pressurizer 4; pressurizer 4 is to the electric energy of monitoring system output steady and continuous; simultaneously; 6 pairs of storage batterys 5 of battery detecting and control signal output circuit detect; according to detected actual conditions; the output control signal; control charges and discharge the conducting of switching tube MOSFET1 and MOSFET2 in protection and the control circuit 2 or ends, and storage battery 5 is carried out charge and discharge protecting and control.At night and overcast and rainy, solar cell 1 can't be worked, and at this moment, 6 pairs of storage batterys 5 of battery detecting and control signal output circuit detect, and the discharge of control storage battery 5, and pressurizer 4 output on-line monitoring systems are required+5V voltage.By switching tube MOSFET1 storage battery 5 is carried out additives for overcharge protection, switching tube MOSFET2 carries out over to storage battery 5.And the output of power supply dog 3 is by gate circuit control switch pipe MOSFET2, realizes this power supply automatically once a day or twice outage, electrification reset process, guarantees the reliability of transmission line online monitoring system long-term work.
The supply power mode that this power supply adopts solar cell and storage battery to combine, the electric energy of steady and continuous is provided for outdoor transmission line on-line monitoring, have power supply dog function, and low in energy consumption, efficient is high, has guaranteed the stable and reliability of transmission line online monitoring system long-term work.

Claims (7)

1. transmission line online monitoring system power supply; it is characterized in that; comprise solar cell (1), charge and discharge protecting and the control circuit (2) and the pressurizer (4) that connect successively; charge and discharge protecting and control circuit (2) are connected with control signal output circuit (6) with power supply dog (3), storage battery (5) and battery detecting respectively, and storage battery (5) is connected with control signal output circuit (6) with battery detecting.
2. according to the described power supply of claim 1; it is characterized in that; the structure of described charge and discharge protecting and control circuit (2) comprising: solar cell (1); the parallel circuits that piezo-resistance MYG20 and switching tube MOSFET1 form; one end of this parallel circuits is connected with the positive pole of voltage stabilizing didoe VD1; it is the positive pole of solar cell (1); the end of piezo-resistance MYG20; the drain electrode of MOSFET1 is connected with the positive pole of voltage stabilizing didoe VD1; the positive pole of the negative pole of voltage stabilizing didoe VD1 and storage battery (5); one end of resistance R is connected with pressurizer (4); the other end of resistance R respectively with the positive pole of voltage stabilizing didoe VD3; the positive pole of voltage stabilizing didoe VD2 is connected with the grid of switching tube MOSFET2; the negative pole of solar cell (1); the other end of piezo-resistance MYG20; the negative pole of the source electrode of switching tube MOSFET1 and storage battery (5) is connected with the source electrode of switching tube MOSFET2 respectively, and the drain electrode of switching tube MOSFET2 is connected with pressurizer (4) output ground.
3. according to claim 1 or 2 described power supplies, it is characterized in that, the structure of described battery detecting and control signal output circuit (6) comprising: the resistance R 1 of series connection and resistance R 2, the other end of resistance R 1 respectively with voltage VD, resistance R 3 is connected with resistance R 5, resistance R 3 is connected with resistance R 4, resistance R 5 is connected with voltage stabilizing didoe VD1, resistance R 5 is connected with the negative pole of voltage stabilizing didoe VD1, resistance R 2, the positive pole of resistance R 4 and voltage stabilizing didoe VD1 is ground connection respectively, bypass between resistance R 1 and the resistance R 2 is connected with the end of resistance R F1 and the positive input of comparator A1 respectively, the output of comparator A1 is connected with resistance R 6, the other end of resistance R 6 respectively with the other end of resistance R F1, the negative pole of voltage stabilizing didoe VD2 is connected with switching tube MOSFET1, the plus earth of voltage stabilizing didoe VD2, the reverse input end of comparator A1 is connected with the reverse input end of comparator A2, the reverse input end of the reverse input end of comparator A1 and comparator A2 also with resistance R 5 and voltage stabilizing didoe VD2 between bypass be connected; The positive input of comparator A2 respectively with resistance R 3 and resistance R 4 between bypass and the end of resistance R F2 be connected, the output of comparator A2 is in series with resistance R 7, the other end of resistance R 7 is connected the plus earth of voltage stabilizing didoe VD3 with the other end of resistance R F2, the negative pole of voltage stabilizing didoe VD3 respectively with switching tube MOSFET2.
4. according to claim 1 or 2 described power supplies, it is characterized in that the structure of described power supply dog (3) comprises: the pin φ 0 of active device (7), pin φ 0And pin φ 1 is connected with capacitor C 1, resistance R 1 and resistance R 2 respectively, capacitor C 1, resistance R 1 and resistance R 2 interconnect, the pin VSS ground connection of active device (7), the pin RST of active device (7) is connected with the negative pole of diode D1, and the positive pole of diode D1 is connected with the positive pole of diode D2, the positive pole of diode D3 and an end of resistance R 3 respectively; The negative pole of diode D2 is connected with the pin Q14 of active device (7), the negative pole of diode D3 is connected with the pin Q5 of active device (7), the other end of resistance R 3 respectively with+VD voltage, the pin VDD of active device (7) is connected with an end of resistance R 5, the other end of resistance R 5 is connected with the negative pole of voltage stabilizing didoe VD3 in the control circuit (6) with the collector electrode and the battery detecting of triode respectively, the grounded emitter of triode, the base stage of triode is connected with an end of resistance R 4, and the other end of resistance R 4 is connected with the negative pole of diode D2 and the pin Q14 of active device (7) respectively
5. according to the described power supply of claim 4, it is characterized in that described active device (7) adopts CD4060.
6. according to the described power supply of claim 4, it is characterized in that, the structure of described pressurizer (4) comprising: the pin+VIN of DC/DC regulated converter (8) respectively with the pin 6 of DC/DC regulated converter (8), the voltage of capacitor C 1 and 5.5V～11.5V is connected, the pin OUT of DC/DC regulated converter (8) is connected with the negative pole of diode D1 and an end of inductance L 1 respectively, the other end of inductance L 1 is connected capacitor C 1 with the pin FB of DC/DC regulated converter (8) respectively with capacitor C 2, the pin GND of DC/DC regulated converter (8), the pin ON of DC/DC regulated converter (8), the positive pole of diode D1 and capacitor C 2 be ground connection respectively.
7. according to the described power supply of claim 6, it is characterized in that described DC/DC regulated converter (8) adopts switching mode buck regulated converter MAX639.
CN2009203052799U 2009-06-29 2009-06-29 Power supply for on-line monitoring system of transmission line Expired - Lifetime CN201499006U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103414887A (en) * 2013-08-30 2013-11-27 国家电网公司 Power distribution network monitoring system
CN104007713A (en) * 2014-01-10 2014-08-27 国家电网公司 Online transmission line tower assembly monitoring device
CN112600307A (en) * 2020-12-31 2021-04-02 广西电网有限责任公司百色供电局 Power transmission line multi-energy complementary power supply system and power supply method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103414887A (en) * 2013-08-30 2013-11-27 国家电网公司 Power distribution network monitoring system
CN104007713A (en) * 2014-01-10 2014-08-27 国家电网公司 Online transmission line tower assembly monitoring device
CN112600307A (en) * 2020-12-31 2021-04-02 广西电网有限责任公司百色供电局 Power transmission line multi-energy complementary power supply system and power supply method thereof

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