CN101577407A - Automatic ice-removing device for tower of high voltage line based on photovoltaic energy - Google Patents
Automatic ice-removing device for tower of high voltage line based on photovoltaic energy Download PDFInfo
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- CN101577407A CN101577407A CNA200910106880XA CN200910106880A CN101577407A CN 101577407 A CN101577407 A CN 101577407A CN A200910106880X A CNA200910106880X A CN A200910106880XA CN 200910106880 A CN200910106880 A CN 200910106880A CN 101577407 A CN101577407 A CN 101577407A
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Abstract
The invention relates to an automatic ice-removing device for the tower of a high voltage line based on photovoltaic energy, comprising a mechanical vibrating system and an electric control system. The mechanical vibrating system is fixed on an external line and the towers of the external line. The electric control system controls the mechanical vibrating system to be switched on or off according to external environment information; the electric control system comprises a data acquisition unit, a solar energy wind energy-aided power supply unit and a control unit; the solar energy wind energy-aided power supply unit is used for supplying electric power to the control unit and the data acquisition unit; the data acquisition unit is used for conversing the received external environment information into an external environment information signal and providing the external environment information signal to the control unit; and the control unit is used for outputting a control signal to the mechanical vibrating system according to the external environment information signal. The invention has simple operation, is not limited by time and terrain, and has high security and low use cost.
Description
[technical field]
The present invention relates to a kind of automatic ice-removing device for tower of high voltage line based on photovoltaic energy, especially designing a kind of solar energy that utilizes can be in conjunction with the device of mechanical vibrator to the tower of high voltage line automatic de-icing.
[background technology]
Serious accumulated snow or icing can cause the pylon distortion of circuit broken string and circuit and serious accident generation such as collapse on the transmission line and on the pylon of transmission line, bring about great losses the common issue with that the present grid company that has become many countries faces to national wealth.
In the known technology, often adopt following several technical finesse measures: under power down mode, adopt crane or insulation work operations car to carry out the snow removal with machine deicing for transmission line snow removing and deicing; Utilize shovel to scrape pulley, remove snow and ice by manual work; And utilize gunslinging or manually knock and remove snow and ice.
Yet all there is operating difficulties in above-mentioned several technical finesse measures, is subjected to the technical problem that mission, enemy, troops, terrain and time limits, efficient is lower, and the fail safe of above-mentioned in addition several technical finesse measures is relatively poor, and the practical operation cost is also comparatively expensive.
The Chinese patent application of publication number CN1150502 " deicer that is used for cable " discloses following technical scheme: a kind of deicer comprises a pair of lead that is connected on the cable and twines along the cable spirality.One end of described lead is connected to a pulse generating unit that produces electromagnetic pulse in lead, and links together at the other end.Rely on the path of lead internal electromagnetic pulse, make between lead, to produce repulsive force, this repulsive force vibration lead and shatter ice that may cover on the cable.Yet above-mentioned electromagnetic force deicer must be operated under the transmission line power down mode, brings more inconvenience for people's productive life, and above-mentioned in addition electromagnetic force deicer also needs Artificial Control, and operation is comparatively inconvenience also.
[summary of the invention]
Purpose of the present invention is exactly to have operation inconvenience, relatively poor, the more high technical problem of cost of fail safe in above-mentioned deicer and the method in order to solve, and the invention provides a kind of automatic ice-removing device for tower of high voltage line based on photovoltaic energy.
Concrete technical scheme of the present invention is as follows:
The invention provides a kind of automatic ice-removing device for tower of high voltage line based on photovoltaic energy, it comprises mechanical vibrating system and electric control system.This mechanical vibrating system is fixed on outside line and the outside line pylon, and this electric control system is controlled the startup of mechanical vibrating system according to external environmental information or closed.Described electric control system comprises data acquisition unit, photovoltaic energy power supply unit and control unit.Described photovoltaic energy power supply unit is used for being this control unit, this data acquisition unit and the power supply of described mechanical vibrating system.The external environmental information that described data acquisition unit is used for receiving offers control unit.Described control unit is used for outputting a control signal to described mechanical vibrating system according to external environmental information.
Described photovoltaic energy power supply unit comprises solar panel and wind-driven generator.This solar panel is used for utilizing photovoltaic effect that solar energy converting is electric energy and output.This wind-driven generator is used for utilizing law of conservation of energy that wind energy is transformed into mechanical energy, again mechanical energy is converted into electric energy wind energy is converted to electric energy and output.
Described solar panel and described wind-driven generator are exported electric energy simultaneously, perhaps export electric energy at interval.
Described photovoltaic energy power supply unit also comprises storage battery and DC/DC transducer.Described storage battery is used for storing described solar panel and described wind-driven generator output electric energy, and its electric energy stored is outputed to described DC/DC transducer.Described DC/DC transducer is used for the electric energy of storage battery output is converted to the operating voltage that described data acquisition unit, described control unit, described telecommunication unit and described mechanical vibrating system need.
Described data acquisition unit comprises a plurality of transducers that are used for gathering external environmental information.The transducer that these are a plurality of to be used for gathering external environmental information is used for external environmental information is converted to the external environmental information signal and offers described control unit.
Described a plurality of transducer that is used for gathering external environmental information is a plurality of temperature sensors, a plurality of imageing sensor and a plurality of vibrating sensor.These a plurality of temperature sensors, these a plurality of imageing sensors and this a plurality of vibrating sensors all are fixed on the outside line and on the outside line pylon.The external environment condition image information that described a plurality of imageing sensor is used for receiving is converted to picture signal and offers described control unit.The ambient temperature information translation that described a plurality of temperature sensor is used for receiving is temperature signal and offers described control unit.Described a plurality of vibrating sensor is converted to the vibration information of outside line and outside line pylon vibration signal and offers described control unit.
Described imageing sensor is ccd sensor, cmos sensor or CIS transducer.
Described temperature sensor is thermocouple sensor, thermistor (temperature) sensor, infrared sensor or silicon temperature sensor.
Described control unit comprises memory, comparator and controller.This comparator is connected to described data acquisition unit, and this comparator is electrically connected with this controller, and this controller is electrically connected with this mechanical vibrating system, and this memory is electrically connected with this comparator.
Described memory is used for the external environmental information threshold signal of storage is offered described comparator.Described comparator is used for comparing receiving the external information signal of described data acquisition unit output and the threshold value external environmental information threshold signal of described memory output, and the compare result signal of output correspondence at last is to described controller.Described controller is used for receiving the compare result signal of described comparator output and the external information signal of described data acquisition unit output, and compare result signal and external environmental information conversion of signals are control signal and offer described telecommunication unit and the exterior mechanical system.
Described mechanical vibrating system comprises motor working cell, jockey and vibrating device.This motor working cell and this vibrating device all are fixed on this jockey, and described vibrating device is fixed on the Optimum Excitation point position of outside line and outside transmission line pylon.Described motor working cell drives described vibrating device and opens vibration or close vibration under the control of the control signal of the controller output of described control unit.
Described motor working cell comprises motor driver and motor, and this motor driver is used for the control signal of controller output is converted to drive signal and offers described motor, controls described motor start-up or closes.
Described mechanical vibrating system comprises motor working cell, jockey and vibrating device, this motor working cell and this vibrating device all are fixed on this jockey, and described vibrating device is fixed on the Optimum Excitation point position of outside line and outside transmission line pylon.Described motor working cell drives described vibrating device and opens vibration or close vibration under the control of the control signal of described control unit output.
Described electric control system also comprises the telecommunication unit, and described photovoltaic energy power supply unit is this telecommunication unit power supply, and this telecommunication unit keeps the real time information communication with external control or control centre under the control of described control unit.
The invention provides a kind of automatic ice-removing device for tower of high voltage line based on photovoltaic energy, its cardinal principle is to utilize solar energy to realize the automatic de-icing of high-tension line in conjunction with mechanical vibrator.Main beneficial effect of the present invention is:
(1). having adopted the photovoltaic energy power supply unit is each working cell in the electric control system and mechanical vibrating system power supply, solar panel in the photovoltaic energy power supply unit by photovoltaic effect with the transform light energy electric energy and store storage battery into and come to provide operating voltage for above-mentioned working cell, it is not subjected to the restriction of time and landform, it is comparatively convenient to operate, and utilize the cost of regenerative resource such as solar energy lower, meet the direction of WeiLai Technology development.
(2). the present invention need not influence the operate as normal of high-tension line, it is used for gathering the external environmental information that the transducer of external environmental information will gather in real time by a plurality of in the data acquisition unit and offers control unit, and control the unlatching of mechanical vibrating system or close by the comparative analysis of control unit, and the vibration frequency and the oscillatory torque of coming mechanical vibrating system, therefore the present invention can realize monitoring automatically and control, can start timely and carry out deicing, do not need manual operation, be not subjected to the restriction of time and landform yet.
In addition, because the present invention adopts telecommunication unit and external control center or control centre to keep the real time information communication, so do not need artificial execute-in-place, so its fail safe is higher, it is comparatively convenient to operate.
[description of drawings]
Fig. 1 is the block diagram that the present invention is based on the automatic ice-removing device for tower of high voltage line of photovoltaic energy;
Fig. 2 is the block diagram that the present invention is based on the electric control system in the automatic ice-removing device for tower of high voltage line of photovoltaic energy;
Fig. 3 is the block diagram that the present invention is based on the photovoltaic energy power supply unit in the automatic ice-removing device for tower of high voltage line of photovoltaic energy;
Fig. 4 is the block diagram that the present invention is based on the control unit in the automatic ice-removing device for tower of high voltage line of photovoltaic energy;
Fig. 5 is the block diagram that the present invention is based on the mechanical vibrating system in the automatic ice-removing device for tower of high voltage line of photovoltaic energy;
Fig. 6 is the block diagram that the present invention is based on the concrete working cell of automatic ice-removing device for tower of high voltage line of photovoltaic energy.
[embodiment]
The present invention relates to a kind of automatic ice-removing device for tower of high voltage line based on photovoltaic energy, described circuit pylon also refers to the signal line that China Mobile, China Telecom etc. are adopted.The main purpose of the device of circuit pylon deicing proposed by the invention is to use, but it is not limited only to the described application of following examples, is described in further detail below in conjunction with Figure of description.
As shown in Figure 1, a kind of automatic ice-removing device for tower of high voltage line based on photovoltaic energy, this device comprises electric control system and mechanical vibrating system.This electric control system is electrically connected to this mechanical vibrating system.Described electric control system is controlled the startup of mechanical vibrating system according to external environmental information or is closed.Described mechanical vibrating system is fixed on outside line and the outside line pylon, and it is opened vibration or stops vibration under the control of electric control system.
As shown in Figure 2, described electric control system comprises data acquisition unit, photovoltaic energy power supply unit, control unit and telecommunication unit.This data acquisition unit is electrically connected to this control unit, and this control unit is electrically connected to the telecommunication unit, and this photovoltaic energy power supply unit is electrically connected with this data acquisition unit, this control unit and this telecommunication unit respectively.
As shown in Figure 3, described photovoltaic energy power supply unit is respectively control unit, data acquisition unit and the power supply of telecommunication unit.Described photovoltaic energy power supply unit comprises solar panel, storage battery, DC/DC transducer.This solar panel utilizes photovoltaic effect that solar energy converting is electric energy, and electric energy is outputed to storage battery.Described storage battery is used for storage of electrical energy and its electric energy stored outputed to described DC/DC transducer.Described DC/DC transducer is used for the electric energy of storage battery output is converted to the operating voltage that described data acquisition unit, described control unit, described telecommunication unit and described tool vibrational system need.
The external environmental information that described data acquisition unit is used for receiving is converted to the external environmental information signal and offers control unit.Described data acquisition unit comprises a plurality of temperature sensors, a plurality of imageing sensor and a plurality of vibrating sensor.These a plurality of temperature sensors, these a plurality of imageing sensors and this a plurality of vibrating sensors all are fixed on outside line and the outside line pylon.Described a plurality of imageing sensor is converted to picture signal with the external environment condition image information that receives, and picture signal is offered described control unit.Described a plurality of imageing sensor can be ccd sensor, cmos sensor or CIS transducer.Described a plurality of temperature sensor is a temperature signal with the ambient temperature information translation that receives, and temperature signal is offered described control unit.Described temperature sensor can be thermocouple sensor, thermistor (temperature) sensor, infrared sensor or silicon temperature sensor.Described a plurality of vibrating sensor is converted to vibration signal with the vibration information of outside line and outside line pylon, and vibration signal is offered described control unit.
As shown in Figure 4, described control unit is used for outputting a control signal to described mechanical vibrating system according to external environmental information, mechanical vibrating system under the control is opened vibration or is closed vibration, and vibration frequency and the oscillatory torque of controlling described mechanical vibrating system.Described control unit comprises memory, comparator and controller.This comparator is electrically connected to described data acquisition unit, and this comparator is electrically connected with this controller; This controller is electrically connected with this mechanical vibrating system; This memory is electrically connected with this comparator.Described memory is used for threshold binary image signal, threshold temperature signal and the threshold value vibration signal of storage are offered described comparator.Described comparator is used for receiving the external information signal of described data acquisition unit output and the threshold value external information threshold signal of described memory output, and the external environmental information signal compared with corresponding external information threshold signal, the corresponding compare result signal of output at last is to described controller.Described controller is used for receiving the compare result signal of described comparator output and the external information signal of described data acquisition unit output, with compare result signal and external environmental information conversion of signals is control signal, and control signal is offered described telecommunication unit and described mechanical vibrating system.
The control signal that described telecommunication unit is used for receiving is converted to signal of communication and offers external management center or control centre, make described device and external management center or control centre based on the deicing of circuit pylon keep real time communication, so that the working condition of circuit is in time understood by external management center or control centre.
As shown in Figure 5, described mechanical vibrating system comprises motor working cell, jockey and vibrating device.This motor working cell and this vibrating device all are fixed on this jockey, according to the principle of dynamics of outside line and outside line pylon this vibrating device are fixed on the pylon Optimum Excitation point position of outside line and outside line.Described motor working cell is accepted the control signal of described control unit output and is vibrated to drive vibrating device, and it comprises motor driver and motor.This motor driver is connected with this electric electromechanics, and this motor driver is electrically connected to the controller in the described control unit, and this motor driver and this motor all are electrically connected to the storage battery in the described photovoltaic energy power supply unit.This motor driver and this motor all receive the operating voltage of described photovoltaic energy power supply unit output to carry out work.Described this motor driver is converted to the control signal of described control unit output drive signal and offers motor, with drive motor work.This motor opens vibration or cuts out vibration under the control of drive signal, and drives described vibrating device and carry out mechanical oscillation according to certain vibration frequency and oscillatory torque.
As shown in Figure 6, the operation principle of the automatic ice-removing device for tower of high voltage line based on photovoltaic energy of the present invention is:
Described solar panel utilizes photovoltaic effect that solar energy converting is electric energy, and electric energy is offered described storage battery.Described storage battery offers described DC/DC transducer with its electric energy stored.Described DC/DC transducer is converted to the operating voltage that described data acquisition unit, described control unit, described telecommunication unit and described tool vibrational system need with the electric energy of storage battery output, and should a plurality of operating voltages provide described data acquisition unit, described control unit, described telecommunication unit and described tool vibrational system respectively.A plurality of temperature sensors in the described data acquisition unit are temperature signal with the ambient temperature information translation that receives, a plurality of imageing sensors are converted to picture signal with the external environment condition image information that receives, and a plurality of vibrating sensors are converted to vibration signal with the vibration information of outside line and outside line pylon.Above-mentioned a plurality of temperature signals, a plurality of picture signal and a plurality of vibration signal all offer the comparator and the controller of described control unit.A plurality of threshold binary image signals that described memory will be stored, a plurality of threshold temperature signal and a plurality of threshold value vibration signal all offer described comparator.A plurality of external environmental information signals that described comparator will receive compare with corresponding a plurality of external information threshold signals, and a plurality of compare result signals of correspondence are offered described controller.Described controller is by the program of inner setting, the motor driver of the control signal of opening the control signal of vibration or closing vibration according to a plurality of compare result signals decision outputs that receive in the mechanical vibrating system, and according to the corresponding vibration frequency control signal of a plurality of external environmental information signal deciding outputs that receive and the oscillatory torque control signal motor driver in the mechanical vibrating system.The control signal of the controller of the described control unit in described telecommunication unit output is converted to signal of communication and offers external management center or control centre, makes described automatic ice-removing device for tower of high voltage line and external management center or control centre's maintenance real time communication based on photovoltaic energy.Described this motor driver is converted to the control signal of the controller output of described control unit drive signal and offers motor, make motor under the control of drive signal, open or close, and make the described vibrating device of motor drives carry out mechanical oscillation according to certain vibration frequency and oscillatory torque.
The invention provides a kind of automatic ice-removing device for tower of high voltage line based on photovoltaic energy, it is mainly former Reason is to utilize regenerative resource to realize the deicing of high-tension line in conjunction with mechanical vibrator. Master of the present invention Want beneficial effect to be:
(1). having adopted the photovoltaic energy power supply unit is each working cell and machinery in the electric control system Vibrational system power supply, the solar panel in the photovoltaic energy power supply unit by photovoltaic effect with transform light energy Electric energy and store battery into and come for above-mentioned working cell provides operating voltage, it is not subjected to time and landform Restriction, it is comparatively convenient to operate, and utilizes the regenerative resource cost such as solar energy lower, meets WeiLai Technology and sends out The direction of exhibition.
(2). the present invention need not affect the normal operation of transmission line of electricity, its a plurality of by in the data acquisition unit The sensor that is used for gathering external environmental information offers control module with the external environmental information of Real-time Collection, And control the unlatching of mechanical vibrating system or close by the comparative analysis of control module, and come mechanical shaking Vibration frequency and the oscillatory torque of moving system, so the present invention can realize automatically monitoring and control, can Start timely and remove snow and ice, do not need manually-operated, also be not subjected to the restriction of time and landform.
In addition, because the present invention adopts telecommunication unit and external control center or control centre to keep real The time information communication, so do not need artificial execute-in-place, so its security is higher, it is comparatively convenient to operate.
Claims (10)
1. automatic ice-removing device for tower of high voltage line based on photovoltaic energy, it comprises mechanical vibrating system and electric control system, this mechanical vibrating system is fixed on outside line and the outside line pylon, this electric control system is controlled the startup of mechanical vibrating system according to external environmental information or is closed, it is characterized in that: described electric control system comprises data acquisition unit, photovoltaic energy power supply unit and control unit, described photovoltaic energy power supply unit is used for being this control unit, this data acquisition unit and the power supply of described mechanical vibrating system, the external environmental information that described data acquisition unit is used for gathering offers described control unit, and described control unit is used for outputting a control signal to described mechanical vibrating system according to external environmental information.
2. the automatic ice-removing device for tower of high voltage line based on photovoltaic energy according to claim 1, it is characterized in that, described photovoltaic energy power supply unit comprises solar panel, and this solar panel is used for utilizing photovoltaic effect that solar energy converting is electric energy and output.
3. the automatic ice-removing device for tower of high voltage line based on photovoltaic energy according to claim 2, it is characterized in that, described photovoltaic energy power supply unit also comprises storage battery and DC/DC transducer, described storage battery is used for storing described solar panel output electric energy, and described DC/DC transducer is used for the electric energy of storage battery output is converted to the operating voltage that described data acquisition unit, described control unit, described telecommunication unit and described mechanical vibrating system need.
4. the automatic ice-removing device for tower of high voltage line based on photovoltaic energy according to claim 3, it is characterized in that, described data acquisition unit comprises a plurality of transducers that are used for gathering external environmental information, and the transducer that these are a plurality of to be used for gathering external environmental information is used for external environmental information is converted to the external environmental information signal and offers described control unit.
5. the automatic ice-removing device for tower of high voltage line based on photovoltaic energy according to claim 4, it is characterized in that, described a plurality of transducer that is used for gathering external environmental information is a plurality of temperature sensors, a plurality of imageing sensors and a plurality of vibrating sensor, these a plurality of temperature sensors, these a plurality of imageing sensors and this a plurality of vibrating sensors all be fixed on the outside line with the outside line pylon on, the external environment condition image information that described a plurality of imageing sensor is used for gathering is converted to picture signal and offers described control unit, the ambient temperature information translation that described a plurality of temperature sensor is used for gathering is temperature signal and offers described control unit that described a plurality of vibrating sensors are converted to the vibration information of outside line and outside line pylon vibration signal and offer described control unit.
6. the automatic ice-removing device for tower of high voltage line based on photovoltaic energy according to claim 5 is characterized in that, described imageing sensor is ccd sensor, cmos sensor or CIS transducer.
7. the automatic ice-removing device for tower of high voltage line based on photovoltaic energy according to claim 5 is characterized in that, described temperature sensor is thermocouple sensor, thermistor (temperature) sensor, infrared sensor or silicon temperature sensor.
8. the automatic ice-removing device for tower of high voltage line based on photovoltaic energy according to claim 4, it is characterized in that, described control unit comprises memory, comparator and controller, and described memory is used for the external environmental information threshold signal of storage is offered described comparator; Described comparator is used for the threshold value external environmental information threshold signal of the external information signal of described data acquisition unit output and the output of described memory is compared, and the corresponding compare result signal of output at last arrives described controller; Described controller is used for receiving the compare result signal of described comparator output and the external information signal of described data acquisition unit output, is control signal with compare result signal and external environmental information conversion of signals and offers described exterior mechanical system.
9. according to claim 1 or 8 described automatic ice-removing device for tower of high voltage line based on photovoltaic energy, it is characterized in that, described mechanical vibrating system comprises motor working cell, jockey and vibrating device, this motor working cell and this vibrating device all are fixed on this jockey, described vibrating device is fixed on the pylon of outside transmission line, and described motor working cell drives described vibrating device and opens vibration or close vibration under the control of the control signal of described control unit output.
10. the automatic ice-removing device for tower of high voltage line based on photovoltaic energy according to claim 1, it is characterized in that, described electric control system also comprises the telecommunication unit, described photovoltaic energy power supply unit is this telecommunication unit power supply, this telecommunication unit keeps the real time information communication with external control or control centre under the control of described control unit.
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| CNA200910106880XA CN101577407A (en) | 2009-04-27 | 2009-04-27 | Automatic ice-removing device for tower of high voltage line based on photovoltaic energy |
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| CNA200910106880XA CN101577407A (en) | 2009-04-27 | 2009-04-27 | Automatic ice-removing device for tower of high voltage line based on photovoltaic energy |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807784A (en) * | 2010-04-01 | 2010-08-18 | 扬州东方吊架有限公司 | Solar ice coating resistant device of overhead transmission line |
| CN101886617A (en) * | 2010-06-07 | 2010-11-17 | 三一电气有限责任公司 | Wind generating set and blade deicing system thereof |
| CN102709861A (en) * | 2012-06-01 | 2012-10-03 | 湖南省湘电试研技术有限公司 | Direct-current ice melting system based on temperature on-line monitor |
| CN105207160A (en) * | 2015-07-21 | 2015-12-30 | 四川大学 | Resonance deicing device and deicing method for electric power facilities |
| CN112103890A (en) * | 2020-09-29 | 2020-12-18 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Automatic ground wire ice melting wiring device remote control system based on APN private network |
| US20220085758A1 (en) * | 2019-05-28 | 2022-03-17 | Huawei Technologies Co., Ltd. | Detection condition determining method, apparatus, and photovoltaic system |
-
2009
- 2009-04-27 CN CNA200910106880XA patent/CN101577407A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807784A (en) * | 2010-04-01 | 2010-08-18 | 扬州东方吊架有限公司 | Solar ice coating resistant device of overhead transmission line |
| CN101886617A (en) * | 2010-06-07 | 2010-11-17 | 三一电气有限责任公司 | Wind generating set and blade deicing system thereof |
| CN101886617B (en) * | 2010-06-07 | 2012-05-30 | 三一电气有限责任公司 | Wind generating set and blade deicing system thereof |
| CN102709861A (en) * | 2012-06-01 | 2012-10-03 | 湖南省湘电试研技术有限公司 | Direct-current ice melting system based on temperature on-line monitor |
| CN105207160A (en) * | 2015-07-21 | 2015-12-30 | 四川大学 | Resonance deicing device and deicing method for electric power facilities |
| US20220085758A1 (en) * | 2019-05-28 | 2022-03-17 | Huawei Technologies Co., Ltd. | Detection condition determining method, apparatus, and photovoltaic system |
| US11799419B2 (en) * | 2019-05-28 | 2023-10-24 | Huawei Technologies Co., Ltd. | Detection condition determining method, apparatus, and photovoltaic system |
| CN112103890A (en) * | 2020-09-29 | 2020-12-18 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Automatic ground wire ice melting wiring device remote control system based on APN private network |
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