CN204536436U - A kind of transmission tower Forewarning Terminal - Google Patents
A kind of transmission tower Forewarning Terminal Download PDFInfo
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- CN204536436U CN204536436U CN201420719753.3U CN201420719753U CN204536436U CN 204536436 U CN204536436 U CN 204536436U CN 201420719753 U CN201420719753 U CN 201420719753U CN 204536436 U CN204536436 U CN 204536436U
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Abstract
A kind of transmission tower Forewarning Terminal, comprise main control module (22), state acquisition circuit (21), photoelectric switching circuit (25), electric energy is for depositing circuit (26), battery acquisition control circuit (29) and the remote communication module (23) for communicating to connect with central server (28), described main control module (22) and state acquisition circuit (21), battery acquisition control circuit (29) and remote communication module (23) connect, described electric energy is connected with battery acquisition control circuit (29) and photoelectric switching circuit (25) for depositing circuit (26), its beneficial effect is, effectively prevent prior art battery once be finished, before replacing battery, supervising device cannot normally work, and change battery-operated troublesome problem, improve the reliability of transmission tower Forewarning Terminal, solve overcast and rainy and there is no sun power evening to be converted into the defect of electric energy, improve the practicality of transmission tower Forewarning Terminal.
Description
Technical field
The utility model relates to electric power transfer early warning field, more particularly, relates to a kind of transmission tower Forewarning Terminal.
Background technology
China is the big country of area more than 9,000,000 square kilometres, and electric power line pole tower serves very important effect in State Grid's transport process.Power transmission rod spreads all over Divine Land, is one wonder of China's power construction.But China's distribution line distribution is wide, quantity is many, dielectric level is low, break down unavoidably in operational process, the faults such as the common wide thunderbolt of fault bag, windage yaw and the aging knochenbruch of line of electric force, the hidden danger of security of the lives and property aspect may be caused not only to society to people around, also cause damage to society simultaneously.
In order to address this problem, its solution carries out detection and early warning to the transmission circuit line of the framework of electric pole tower.At present, the major technique adopted is, to each, monitoring terminal is sent early warning information separately to the service centre specified or related personnel, then carry out data processing by central server, the power source of these watch-dogs is powered often by built-in battery.But battery is once be finished, before replacing battery, supervising device cannot normally work, and change battery-operated trouble, the more aobvious difficulty in place far away especially in the wild.This by battery powered mode, reduce the reliability of watch-dog.
Utility model content
The technical problems to be solved in the utility model is, the mode that the above-mentioned existing electric pole tower watch-dog for prior art adopts battery to carry out powering reduces the defect of the reliability of watch-dog, provides a kind of transmission tower Forewarning Terminal.
The utility model solves the technical scheme that its technical matters adopts and there is provided a kind of transmission tower Forewarning Terminal, comprise the state acquisition circuit of the status information being detected transmission line of electricity by sensor, for sun power being converted to the photoelectric switching circuit of electric energy, power to functional realiey unit and the electric energy including rechargeable battery for depositing circuit, battery acquisition control circuit, for the remote communication module communicated to connect with central server, and respectively with state acquisition circuit, remote communication module, the main control module that wireless communication module is connected with battery acquisition control circuit, described electric energy is connected with battery acquisition control circuit and photoelectric switching circuit for depositing circuit, described battery acquisition control circuit is for obtaining the output voltage V of described rechargeable battery, and stop or starting described electric energy for depositing circuit, power storage being powered to rechargeable battery and described rechargeable battery to functional realiey unit under master control module controls, described functional realiey unit comprises described main control module, state acquisition circuit, battery acquisition control circuit, wireless communication module and remote communication module.
In terminal of the present utility model, main control module comprises the first acquiring unit of the transmission line status information for obtaining state acquisition electric circuit inspection, be connected with the first acquiring unit and control remote communication module sends the first control module from fault status information to central server when power line failure, for obtaining the second acquisition unit of described output voltage V from described battery acquisition control circuit, be connected with second acquisition unit and stop described electric energy to continue power storage to the second control module in rechargeable battery for depositing circuit at output voltage V higher than controlling described battery acquisition control circuit during the first preset value V1, and to be connected with second acquisition unit and after detecting that described output voltage V is lower than the second preset value V2, control described battery acquisition control circuit and control described electric energy for depositing circuit continuation by power storage to the 3rd control module in rechargeable battery, if and to be connected with second acquisition unit and at described output voltage V lower than the 3rd preset value V3, then control described functional realiey unit and enter dormant state, and after Preset Time, start the 4th control module that described functional realiey unit carries out work, wherein, V1 is more than or equal to V2, V3 is less than V2.
In terminal of the present utility model, also comprise wireless communication module, above-mentioned wireless communication module is also functional realiey unit, for setting up wireless connections with the wireless communication module of other monitor terminals, to receive the failure message of other wireless communication modules and to be sent to main control module, or send failure message under master control module controls; When above-mentioned main control module also breaks down for establishing a communications link in above-mentioned remote communication module and central server, control above-mentioned wireless transport module and send failure message, also for receiving the failure message of other monitor terminals that above-mentioned wireless communication module sends, and control remote communication module sends failure message from other monitor terminals to central server.
In terminal of the present utility model, described main control module also for starting after described functional realiey unit carries out work after Preset Time, if above-mentioned output voltage V is lower than the 3rd preset value V3, then control above-mentioned functional realiey unit and enter dormant state, and after Preset Time, again start described functional realiey unit carry out work.
In terminal of the present utility model, above-mentioned sensor comprises tilt induction sensor, vibration induction sensor, thunder-strike current sensor, leakage current sensor.
In terminal of the present utility model, above-mentioned remote communication module is communicated by GPRS with between central server, a kind ofly in gsm communication and cdma communication mode realize communicating to connect.
In terminal of the present utility model, above-mentioned electric energy also comprises electric energy modulate circuit, charging circuit and voltage conversion circuit for depositing circuit, above-mentioned charging circuit and electric energy modulate circuit and rechargeable battery electricity connect, above-mentioned voltage conversion circuit one end connects rechargeable battery, and the other end is electric energy output end; Above-mentioned charging circuit is used for charging to rechargeable battery, above-mentioned voltage conversion circuit is used for the voltage transitions that provided by rechargeable battery for above-mentioned functions and realizes the voltage that uses needed for unit, and above-mentioned electric energy modulate circuit is for receiving above-mentioned electric energy and nursing one's health.
In terminal of the present utility model, above-mentioned electric energy modulate circuit comprises header box, inverter and controller, above-mentioned header box is used for above-mentioned electric energy to conflux, above-mentioned inverter input terminal is connected with header box, output terminal is connected with charging circuit, for the electric energy after confluxing is become interchange from direct current, above-mentioned controller is connected with header box and inverter, for controlling header box and inverter carries out work.
In terminal of the present utility model, photoelectric switching circuit comprises: the first trans-impedance amplifier and the second trans-impedance amplifier, the in-phase input end of above-mentioned first trans-impedance amplifier is connected with the in-phase input end of the second trans-impedance amplifier, and simultaneously ground connection, inverting input is connected with one end of the first resistance with the anode of photodiode respectively; The negative electrode of above-mentioned photodiode is connected with one end of the second resistance with the inverting input of above-mentioned second trans-impedance amplifier respectively; The other end of above-mentioned first resistance connects the output terminal of above-mentioned first trans-impedance amplifier; The other end of above-mentioned second resistance connects the output terminal of above-mentioned second trans-impedance amplifier.
Implement a kind of transmission tower Forewarning Terminal of the present utility model, there is following beneficial effect: by photoelectric switching circuit, sun power is converted to electric energy, and carried out storage and the power supply of electric energy for storing module by electric energy, effectively prevent prior art battery once be finished, before replacing battery, supervising device cannot normally work, and change battery-operated troublesome problem, substantially increase the reliability of transmission tower Forewarning Terminal.Rechargeable battery simultaneously by arranging effectively can solve overcast and rainy and not have evening sun power to be converted into the defect of electric energy, improves the practicality of the utility model transmission tower Forewarning Terminal.Remote communication module to communicate with central server there is obstacle time, by wireless communication module, complaint message is sent to the wireless communication module of other-end, and by other-end, complaint message is sent, improve the transmission chance of success of complaint message, further increase the reliability of the utility model transmission tower Forewarning Terminal.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the systematic schematic diagram of existing a kind of transmission tower terminal;
Fig. 2 is the structural representation of the preferred embodiment of the utility model transmission tower Forewarning Terminal;
Fig. 3 is the composition schematic diagram of main control module in the utility model transmission tower Forewarning Terminal Fig. 2;
Fig. 4 is the schematic diagram of the photoelectric switching circuit preferred embodiment of the utility model transmission tower Forewarning Terminal;
Fig. 5 is that the electric energy of the utility model transmission tower Forewarning Terminal is for the schematic diagram depositing circuit preferred embodiment.
Embodiment
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
As shown in Figure 1, it is the systematic schematic diagram of existing a kind of electric pole tap terminal, wherein server centered by 11, and 12 for being arranged on monitor terminal on electric pole tower.After monitor terminal 12 detects that power transmission line breaks down, by the remote communication devices being arranged on monitor terminal, failure message is sent it back central server 11, central server 11 just can know corresponding failure message after receiving failure message.Failure message can be preserved by central server, and secondary failure message can be sent share as it share terminal, as mobile phone, computer etc.
As shown in Figure 2, it is the structural representation of the preferred embodiment of the utility model transmission tower Forewarning Terminal.This monitor terminal (within dotted line frame) comprises main control module 22, state acquisition circuit 21, wireless communication module 24, photoelectric switching circuit 25, electric energy for depositing circuit 26, battery acquisition control circuit 29 and remote communication module 23.Main control module 22 is connected 23 with state acquisition circuit 21, battery acquisition control circuit 29 and remote communication module, and electric energy is connected with battery acquisition control circuit 29 and photoelectric switching circuit 25 for depositing circuit 26.Remote communication module 23 and central server 28 communicate to connect, and its connected mode comprises; Gsm communication, GPRS communication and cdma communication in any one, the present embodiment be preferably GPRS communication, frequency range is up: 890-915MHz, descending: 935-960MHz.
State acquisition circuit 21 comprises sensor, sensor above-mentioned in the present embodiment preferably includes tilt induction sensor, vibration induction sensor, thunder-strike current sensor, leakage current sensor, utilize these sensors respectively to transmission electric line different aspect detect, after detection by detect transmission line of electricity status information and be sent to main control module 22.
Wireless communication module 24 is connected with master control mould 22 pieces, for setting up wireless connections with the radio communication mold 27 pieces of other monitor terminals, to receive the failure message of other wireless communication modules 27 and to be sent to main control module 22.Wireless communication module 27 must in the range for wireless communication of wireless communication module 24, the quantity of other wireless communication modules that wireless communication module 24 communicates to connect can and concrete condition determined, and embodiment is preferably 1, i.e. wireless communication module 27.When there is communication failure between remote communication module 23 and central server 28, main control module 22 can control this module and send failure message to wireless communication module 27.In other embodiments, wireless communication module is not to exist, but the consequence caused occurs the communication barrier between a single remote communication module 23 and central server 28, and above-mentioned failure message cannot be sent to central server.
Battery acquisition control circuit 29 is for obtaining electric energy for the output voltage depositing rechargeable battery in circuit 26, its size is V, this battery acquisition control circuit 29 can stop or starting described electric energy for depositing circuit 26 by power storage to rechargeable battery under master control module controls, also can stop or starting described rechargeable battery and power to described functional realiey unit.This practical new in, functional realiey unit comprises main control module, state acquisition circuit, battery acquisition control circuit and remote communication module, if also there is wireless communication module in terminal, then it is also functional realiey unit.
As shown in Figure 3, Fig. 3 is the composition schematic diagram of main control module in the utility model transmission tower Forewarning Terminal Fig. 2, main control module 22 comprises the first acquiring unit 221, second acquisition unit 223, the first control module 222 of being connected with the first acquiring unit 22, and the second control module 224, the 3rd control module 225, the 4th acquiring unit 226 that are connected respectively with second acquisition unit 223.First acquiring unit 221 is for obtaining the status information of the power transmission line of the transmission of state acquisition circuit 21, when first control module 222 judges that line of electric force breaks down according to above-mentioned status information, control remote communication module 23 and send fault status information to central server 28.When the communication connection that above-mentioned remote communication module 23 and central server 28 are set up is broken down, central authorities' process 22 modules can control above-mentioned wireless transport module 24 and send this failure message.Receive when central authorities process 22 modules the failure message receiving other monitor terminals 27 that the above-mentioned wireless communication module of wireless communication module 27 sends, and control remote communication module sends failure message from other monitor terminals 27 to central server 28.
Second acquisition unit 223 obtains described output voltage V from above-mentioned battery acquisition control circuit 29, if the output voltage V of described rechargeable battery is higher than the first preset value V1, second control module 224 control described battery acquisition control circuit stop described electric energy for deposit circuit continue by power storage to rechargeable battery, avoid due to battery overshoot damage battery.After a stop after charging, if the output voltage V of battery is lower than the second preset value V2, the 3rd control module 225 controls described battery acquisition control circuit and starts described electric energy for depositing circuit continuation by power storage to rechargeable battery, and wherein V2 is less than or equal to V1.If cell output voltage V is lower than the 3rd preset value V3, the various piece that 4th control module 226 realizes unit by main control module 29 controlling functions enters dormant state, and terminal is started after Preset Time, such loss that can reduce electric energy, effectively avoid causing damage because supply voltage is too low to each several part of functional realiey unit, wherein V3 is less than V2.Preferably, start after described functional realiey unit carries out work after Preset Time, continue to obtain cell output voltage, if cell output voltage V is still lower than the 3rd preset value V3, the various piece being realized unit by the 4th control module 226 controlling functions enters dormant state, and after Preset Time, starts described functional realiey unit carry out work.Repeat above-mentioned steps, until the output voltage of battery is not less than the 3rd preset value V3.
Photoelectric switching circuit 25 can be used for electroplax by luminous energy converting electrical energy by sun power.As shown in Figure 3, it is the schematic diagram of the photoelectric switching circuit preferred embodiment of the utility model sun power transmission tower early warning monitoring terminal, comprise the first trans-impedance amplifier 31 and the second trans-impedance amplifier 32, the in-phase input end of the first trans-impedance amplifier 31 is connected with the in-phase input end of the second trans-impedance amplifier 32, and simultaneously ground connection, the first trans-impedance amplifier 31 inverting input is connected with one end of the first resistance 33 with the anode of photodiode 35 respectively; The negative electrode of photodiode 35 is connected with one end of the second resistance 34 with the inverting input of the second trans-impedance amplifier 32 respectively; The output terminal of the first trans-impedance amplifier 31 described in another termination of described first resistance 33; The output terminal of the second trans-impedance amplifier 32 described in another termination of described second resistance 34.In order to filtering needs, preferably can distinguish an electric capacity (not shown) in parallel on the first resistance 33 and the second resistance 34, filtering is carried out to electric energy.From electricity knowledge, the differential voltage V1-V2 of described first trans-impedance amplifier (31) and the conversion of described second trans-impedance amplifier (32) output photoelectric.
As shown in Figure 4, it is that the electric energy of the utility model transmission tower Forewarning Terminal is for the schematic diagram depositing circuit preferred embodiment.The electric energy transmitted due to photoelectric switching circuit 25 is small DC current, can not directly use, and needs after electric energy supplies to deposit circuit 26 conditioning, could, by power storage to rechargeable battery, power to functional realiey unit by this rechargeable battery.Concrete, electric energy comprises electric energy modulate circuit 41, charging circuit 42, rechargeable battery 43 and voltage conversion circuit 44 for depositing circuit 26.Charging circuit 42 is connected with electric energy modulate circuit 41 and rechargeable battery 43, and described voltage conversion circuit 44 one end connects rechargeable battery, and the other end is electric energy output end.After photoelectric switching circuit 25 provides electric energy to nurse one's health by electric energy modulate circuit 41, by charging circuit 42 for charging to rechargeable battery 43.Voltage conversion circuit 44 is converted to the magnitude of voltage used needed for functional realiey unit for the magnitude of voltage provided by rechargeable battery 41, generally realized or transformer by DCDC.Carried out storage and the power supply of electric energy by rechargeable battery 43, effectively can solve work at overcast and rainy and night is do not have sun power to carry out the defect of powering.
As shown in Figure 4, electric energy modulate circuit 41 comprises header box 411, inverter 412 and controller 413.Described electric energy confluxes by header box 411 by photoelectric switching circuit 25, inverter 412 input end is connected with header box, output terminal is connected with chargeable circuit 413, electric energy after header box 411 confluxes is become interchange from direct current, described controller 412 is connected with header box 411 and inverter 412, for controlling header box and inverter carries out work.After becoming interchange, charged by charging circuit 42 pairs of rechargeable batteries 43.
As shown in Figure 5, main control module 22 comprises the first acquiring unit 221 and second and obtains unit 223, wherein the first acquiring unit is for obtaining state acquisition circuit 21 transmission line status information, second acquisition unit 223 is for obtaining described output voltage V from described battery acquisition control circuit (29), main control unit 22 also comprises four control modules, wherein, first control module 222, be connected with the first acquiring unit 221 and control remote communication module (23) when receiving power line failure signal and send fault status information to central server (28), second control module 223, 3rd control module 224, 3rd control module 225 is all connected with second acquisition unit 223 with the 4th control module 226, wherein the second control module 223 stops electric energy continuing power storage in rechargeable battery 43 for depositing circuit 26 at second acquisition unit 223 output voltage V higher than controlling battery acquisition control circuit 29 during the first preset value V1, 3rd control module 224 is after detecting that output voltage V is lower than the second preset value V2, and control battery acquisition control circuit 29 controls described electric energy to be continued power storage in rechargeable battery 43 for depositing circuit 26, if the 4th control module 225 is at described output voltage V lower than the 3rd preset value V3, then controlling functions realizes unit and enters dormant state, and after Preset Time, starts described functional realiey unit carry out work.Wherein, V1 is more than or equal to V2, and V3 is less than V2.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, also can make a lot of form, these all belong within protection of the present utility model.
Claims (7)
1. a transmission tower Forewarning Terminal, it is characterized in that, comprise the state acquisition circuit (21) of the status information being detected transmission line of electricity by sensor, for sun power being converted to the photoelectric switching circuit (25) of electric energy, power to functional realiey unit and the electric energy including rechargeable battery (43) for depositing circuit (26), battery acquisition control circuit (29), for the remote communication module (23) communicated to connect with central server (28), and respectively with state acquisition circuit (21), remote communication module (23), the main control module (22) that wireless communication module (24) is connected with battery acquisition control circuit (29), described electric energy is connected with battery acquisition control circuit (29) and photoelectric switching circuit (25) for depositing circuit (26), described battery acquisition control circuit (29) is for obtaining the output voltage V of described rechargeable battery (43), and under main control module (22) controls, stop or starting described electric energy for depositing circuit (26) power storage is powered to functional realiey unit to rechargeable battery (43) and described rechargeable battery (43), described functional realiey unit comprises described main control module (22), state acquisition circuit (21), battery acquisition control circuit (29), wireless communication module (24) and remote communication module (23).
2. terminal according to claim 1, it is characterized in that, described main control module (22) comprises the first acquiring unit (221) for obtaining the transmission line status information that state acquisition circuit (21) detects, be connected with the first acquiring unit (221) and control remote communication module (23) sends the first control module (222) from fault status information to central server (28) when power line failure, for obtaining the second acquisition unit (223) of described output voltage V from described battery acquisition control circuit (29), be connected with second acquisition unit (223) and stop described electric energy to continue power storage to the second control module (224) in rechargeable battery (43) for depositing circuit (26) at output voltage V higher than controlling described battery acquisition control circuit (29) during the first preset value V1, and to be connected with second acquisition unit (223) and after detecting that described output voltage V is lower than the second preset value V2, control described battery acquisition control circuit (29) and control described electric energy for depositing circuit (26) continuation by power storage to the 3rd control module (225) in rechargeable battery (43), and with second acquisition unit (223) if to be connected and at described output voltage V lower than the 3rd preset value V3, then control described functional realiey unit and enter dormant state, and after Preset Time, start the 4th control module (226) that described functional realiey unit carries out work, wherein, V1 is more than or equal to V2, V3 is less than V2.
3. terminal according to claim 2, it is characterized in that, described wireless communication module (24) is for setting up wireless connections with the wireless communication module of other monitor terminals (27), to receive the failure message of other wireless communication modules (27) and to be sent to main control module (22), or send failure message under main control module (22) controls;
When also there is obstacle for establishing a communications link at described remote communication module (23) and central server (28) in described main control module (22), control described wireless transport module (24) and send failure message, also for receiving the failure message of other monitor terminals that described wireless communication module (24) sends, and control remote communication module sends failure message from other monitor terminals described to central server (28).
4. terminal according to any one of claim 1-3, it is characterized in that, described sensor comprises tilt induction sensor, vibration induction sensor, thunder-strike current sensor, leakage current sensor, is communicated, a kind ofly in gsm communication and cdma communication mode realizes communicating to connect between described remote communication module (23) with central server (28) by GPRS.
5. terminal according to any one of claim 1-3, it is characterized in that, described electric energy also comprises electric energy modulate circuit (41), charging circuit (42) and voltage conversion circuit (44) for depositing circuit (26), described charging circuit (42) is connected with electric energy modulate circuit (41) and rechargeable battery (43), described voltage conversion circuit (44) one end connects rechargeable battery (43), and the other end is electric energy output end;
Described charging circuit (42) is for charging to rechargeable battery (43), described voltage conversion circuit (44) is the required voltage used of described functional realiey unit for the voltage transitions provided by rechargeable battery (43), the electric energy that described electric energy modulate circuit (41) produces for nursing one's health photoelectric switching circuit (25).
6. terminal according to claim 5, it is characterized in that described electric energy modulate circuit (41) comprises header box (411), inverter (412) and controller (413), described header box (411) is for confluxing described electric energy, described inverter (412) input end is connected with header box (411), output terminal is connected with charging circuit (42), for the electric energy after confluxing is become interchange from direct current, described controller (413) is connected with header box (411) and inverter (412), for controlling header box (411) and inverter (412) carries out work.
7. terminal according to any one of claim 1-3, described photoelectric switching circuit (25) comprising: the first trans-impedance amplifier (31) and the second trans-impedance amplifier (32), the in-phase input end of described first trans-impedance amplifier (31) is connected with the in-phase input end of the second trans-impedance amplifier (32), and simultaneously ground connection, inverting input is connected with one end of the first resistance (33) with the anode of photodiode (35) respectively;
The negative electrode of described photodiode (35) is connected with one end of the second resistance (34) with the inverting input of described second trans-impedance amplifier (32) respectively, the output terminal of the first trans-impedance amplifier (31) described in another termination of described first resistance (33); The output terminal of the second trans-impedance amplifier (32) described in another termination of described second resistance (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420719753.3U CN204536436U (en) | 2014-11-25 | 2014-11-25 | A kind of transmission tower Forewarning Terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420719753.3U CN204536436U (en) | 2014-11-25 | 2014-11-25 | A kind of transmission tower Forewarning Terminal |
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| CN204536436U true CN204536436U (en) | 2015-08-05 |
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| CN201420719753.3U Active CN204536436U (en) | 2014-11-25 | 2014-11-25 | A kind of transmission tower Forewarning Terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866623A (en) * | 2016-04-04 | 2016-08-17 | 合肥博雷电子信息技术有限公司 | Fault indicator state recognition device |
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2014
- 2014-11-25 CN CN201420719753.3U patent/CN204536436U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866623A (en) * | 2016-04-04 | 2016-08-17 | 合肥博雷电子信息技术有限公司 | Fault indicator state recognition device |
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Address after: 657000 Zhaotong province Yunnan city Zhaoyang district development area Zhuti Middle Road Patentee after: ZHAOTONG POWER SUPPLY BUREAU, YUNNAN POWER GRID CO., LTD. Address before: 657000 Zhaotong province Yunnan city Zhaoyang district development area Zhuti Middle Road Patentee before: Zhaotong Power Supply Bureau, Yunnan Grid Co., Ltd. |