CN203894362U - Fault indicator of tower power transmission line - Google Patents
Fault indicator of tower power transmission line Download PDFInfo
- Publication number
- CN203894362U CN203894362U CN201420239376.3U CN201420239376U CN203894362U CN 203894362 U CN203894362 U CN 203894362U CN 201420239376 U CN201420239376 U CN 201420239376U CN 203894362 U CN203894362 U CN 203894362U
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- transmission line
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- shaft tower
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 33
- 230000007257 malfunction Effects 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims 1
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 4
- 239000003990 capacitor Substances 0.000 description 11
- 238000001514 detection method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000012546 transfer Methods 0.000 description 7
- 238000007689 inspection Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000004807 localization Effects 0.000 description 4
- 238000013024 troubleshooting Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model relates to an earth fault indication positioning apparatus of a high voltage transmission line, especially relates to a fault indicator of a tower power transmission line, belonging to the technical field of electric power tools. The fault indicator comprises a pedestal. A current transformer and a control circuit board connected with a power supply are arranged on the pedestal. An MCU processor is welded on the control circuit board. A secondary current output terminal of the current transformer is connected with a signal input terminal of the MCU processor through a rectification filter circuit and an amplification circuit arranged on the control circuit board. The signal input terminal of the MCU processor is also connected with a photo resistor. A control output terminal of the MCU processor is connected with a board turning indicator and an LED alarm lamp. A semicircle housing is arranged above the pedestal. A display window is arranged on the semicircle housing. The display window is corresponding to the board turning indicator, the LED alarm lamp and the photo resistor arranged on the pedestal. According to the fault indicator provided by the utility model, structure is simple, line faults can be fast and accurately positioned, searching difficulty of the fault can be reduced, workload and labor intensity of tour personnel are reduced, and power supply is stable and reliable.
Description
Technical field
The utility model relates to a kind of ultra-high-tension power transmission line earth fault instruction locating device, and particularly a kind of shaft tower transmission line malfunction indicator, belongs to electric power tool technical field.
Background technology
The safe and reliable operation of ultra-high-tension power transmission line is related to the safety and stability of whole electric system, therefore more and more higher to the attention degree of transmission line of electricity safe operation, still while all requiring technically transmission line of electricity to break down, can locate fast and accurately elimination from management, guarantee the reliable and stable of power supply.
Transmission line malfunction is searched the fault coverage of still calculating taking fault localization system as foundation now, but because range measurement system setting valve is unreasonable, circuit technical data is inaccurate, the not equal factor of fault type causes the numerical value that fault localization system provides to have larger error, increase the scope of troubleshooting.Fault localization system can only be determined fault coverage in addition, fault in-situ lacks a kind of device prompting fault occurrence positions that can intuitively indicate, the personnel that need to make an inspection tour when troubleshooting judge by rule of thumb, be difficult to find trouble spot for some instantaneitys, the unconspicuous fault of vestige, often need veteran tour personnel repeatedly to intersect to make an inspection tour and just can find abort situation, for localization of fault and processing bring very big inconvenience fast.
Utility model content
According to above deficiency of the prior art, problem to be solved in the utility model is: provide a kind of simple in structure, can quick and precisely locate transmission line malfunction, reduce the difficulty of searching of fault, reduce tour personnel's workload and labour intensity, guarantee the shaft tower transmission line malfunction indicator of powering reliable and stable.
The utility model solves the technical scheme that its technical matters adopts:
Described shaft tower transmission line malfunction indicator, comprise base, current transformer and the control circuit board being connected with power supply are set on base, on control circuit board, weld MCU processor, the secondary current output terminal of current transformer is connected the signal input part of MCU processor with amplifying circuit by the current rectifying and wave filtering circuit on control circuit board, the signal input part of MCU processor also connects photoresistance, the control output end of MCU processor connects respectively board turning indicator and LED warning lamp, base top arranges semicircle shell, on semicircle shell, display window is set, the board turning indicator arranging on display window and base, LED warning lamp is corresponding with photoresistance.
Described shaft tower transmission line malfunction indicator can be widely used in the earth fault instruction location of all overhead power transmission line pole towers, can shorten searching the time of fault, realize location fast, the personnel's that make an inspection tour workload and labour intensity are reduced, safety and stability to whole electric system and economical operation have this important meaning, described current rectifying and wave filtering circuit and amplifying circuit adopt accurate full-wave rectifying circuit and peak detection circuit, effectively AC signal is converted to direct current signal, and amplify, only need a road 3.3V power supply signal input to complete, low in energy consumption.MCU processor carries out signal collecting and controlling output; 16 super low-power consumptions of one of MCU processor adopting Texas Instruments (TI), there is mixed-signal processor (Mixed Signal Processor) the MSP430 series monolithic of reduced instruction set computer (RISC); MCU processor is prior art; can realize simply and easily by MCU processor; do not need to make creationary effort, what the utility model was protected is the connection of hardware circuit again.
Hand-reset button and testing button are set on described base, and hand-reset button is connected respectively MCU processor with testing button with test circuit by the reset circuit on control circuit board.Fault can be by hand-reset after getting rid of, easy to operate, testing button for the production of time test.If do not carry out hand-reset or occur in misoperation situation, device can automatically reset, and automatically resets and can realize by the control of MCU processor, and the automatically reset time can be set as required, automatically reset and can reduce personnel's the labour intensity of safeguarding, the impact of avoiding misoperation to bring.
Preferably, power acquisition button cell.Volume is little, low in energy consumption, installs and changes conveniently.
Preferably, semicircle shell inner side arranges screen layer.Reduce the impact of electromagnetic interference (EMI).
Preferably, MCU processor adopting MSP430.Processing power is strong, and fast operation is low in energy consumption.
Preferably, MCU processor also connects wireless radio-frequency communication module.Failure message is sent in real time in the detection system and mobile terminal of O&M unit, dock with power grid GIS Geographic Information System, realize the Real-Time Monitoring of fault shaft tower position and locate fast.
The detection method of described shaft tower transmission line malfunction indicator, comprises the following steps:
(1) current distributing wire is penetrated in the middle of current transformer by two circular holes of base bottom, current distributing wire is connected in parallel on tower grounding passage;
(2) in the time that ultra-high-tension power transmission line occurs through the short trouble of tower grounding, by the current distributing wire being connected in parallel on shaft tower, fault current is shunted, responded to a faint current signal by current transformer;
(3) first faint current signal changes ac voltage signal into, ac voltage signal carries out filtering by electric capacity, filtered ac voltage signal carries out rectification through full-wave rectifying circuit, convert ac voltage signal to d. c. voltage signal, d. c. voltage signal is connected the signal input part of MCU processor with amplifying circuit by peak detection circuit, full-wave rectifying circuit, peak detection circuit and amplifying circuit are connected power supply;
(4) MCU processor carries out analyzing and processing after d. c. voltage signal being detected, then drives the positive and negative driving circuit of motor of board turning indicator to drive board turning indicator to carry out board turning action, instruction line fault, and the positive and negative driving circuit of motor connects power supply;
(5) signal input part of MCU processor is also connected photoresistance and LED warning lamp with control output end, in the time that current transformer (11) senses that current signal and photoresistance detect that light is weak, photoresistance sends signal to MCU processor, MCU processor control LED warning lamp is bright, and photoresistance is connected power supply with LED warning lamp;
(6) after line fault instruction, staff indicates and overhauls according to line fault, after maintenance, reset by the hand-reset button on base, or control to realize according to the time of setting by MCU processor and automatically reset, hand-reset button connects MCU processor by reset circuit, and reset circuit connects power supply.
The button cell of two 3V for described power acquisition, converts the output of 3.3V power supply to by power conversion chip after the button cell series connection of two 3V, and 3.3V power supply accesses MCU processor after by capacitor filtering.
The beneficial effect that the utility model has is:
Described shaft tower transmission line malfunction indicator is arranged on transmission tower tower body, when earth-fault current can detect that in the time that tower body leaks into the earth fault current flows through, and report to the police, prompting fault shaft tower position, for troubleshooting provides field judgment bases, realized transmission line malfunction fast, accurately location, reduce troubleshooting difficulty, the personnel's that make an inspection tour workload and labour intensity are reduced, for fault fast processing gains time, the safety and stability to whole electric system and economical operation have very important meaning.
The utility model is arranged on tower grounding passage, installation is convenient, circuit is not formed to potential safety hazard, can indicate delicately this base shaft tower whether earth fault occurs, and can automatically recover normal condition, stand-by power consumption is little, maintenance cost is low, is applicable to long-time running, has facilitated maintainer to judge quickly and accurately earth fault, shorten fault location time, ensured for the safe operation of transmission line of electricity provides effectively.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model inner structure schematic diagram;
Fig. 3 is MCU processor connection diagram of the present utility model;
Fig. 4 is rectifying and wave-filtering amplification circuit diagram of the present utility model;
Fig. 5 is power-switching circuit figure of the present utility model;
Fig. 6 is that motor of the present utility model drives schematic diagram;
Fig. 7 is photoresistance circuit connection diagram of the present utility model;
Fig. 8 is the circuit connection diagram of LED warning lamp of the present utility model;
Fig. 9 is the circuit connection diagram of hand-reset button of the present utility model;
Figure 10 is theory diagram of the present utility model;
Figure 11 is the structural representation of the utility model embodiment 2;
Wherein, 1, semicircle shell; 2, base; 3, board turning indicator; 4, hand-reset button; 5, testing button; 6, LED warning lamp; 7, display window; 8, power supply; 9, photoresistance; 10, control circuit board; 11, current transformer; 12, current distributing wire.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Fig. 1-Figure 10, shaft tower transmission line malfunction indicator described in the utility model comprises circular base 2, current transformer 11 and control circuit board 10 are set on base 2, on control circuit board 10, weld MCU processor, the secondary current output terminal of current transformer 11 is connected the signal input part of MCU processor with amplifying circuit by the current rectifying and wave filtering circuit on control circuit board 10, the signal input part of MCU processor also connects photoresistance 9, the control output end of MCU processor connects board turning indicator 3 by motor positive and inverse driving circuit, the control output end of MCU processor also connects LED warning lamp 6, base 2 tops arrange semicircle shell 1, semicircle shell 1 by above-mentioned component cover in inside, on semicircle shell 1, display window 7 is set, the board turning indicator 3 arranging on display window 7 and base 2, LED warning lamp 6 and photoresistance 9 are corresponding, photoresistance 9, LED warning lamp 6, motor positive and inverse driving circuit, current rectifying and wave filtering circuit is all connected power supply with amplifying circuit, the button cell of two 3V for power acquisition, after the button cell series connection of two 3V, convert the output of 3.3V power supply to by power conversion chip, 3.3V power supply accesses MCU processor after by capacitor filtering.Hand-reset button 4 and testing button 5 are set on base 2, and hand-reset button 4 is connected respectively MCU processor with testing button 5 with test circuit by the reset circuit on control circuit board 10.Semicircle shell 1 inner side arranges screen layer, MCU processor adopting MSP430.
The detection method of shaft tower transmission line malfunction indicator, comprises the following steps:
(1) current distributing wire 12 is penetrated in the middle of current transformer 11 by two circular holes of base 2 bottoms, current distributing wire 12 is connected in parallel on shaft tower;
(2) in the time that ultra-high-tension power transmission line occurs through the short trouble of tower grounding, by the current distributing wire 12 being connected in parallel on shaft tower, the fault current of the shaft tower of flowing through is shunted, responded to a faint current signal by current transformer 11;
(3) first faint current signal changes ac voltage signal into, ac voltage signal carries out filtering by electric capacity, filtered ac voltage signal carries out rectification through full-wave rectifying circuit, convert ac voltage signal to d. c. voltage signal, d. c. voltage signal is connected the signal input part of MCU processor with amplifying circuit by peak detection circuit, full-wave rectifying circuit, peak detection circuit and amplifying circuit are connected power supply;
(4) MCU processor carries out analyzing and processing after d. c. voltage signal being detected, then drives the positive and negative driving circuit of motor of board turning indicator 3 to drive board turning indicator 3 to carry out board turning action, instruction line fault, and the positive and negative driving circuit of motor connects power supply;
(5) signal input part of MCU processor is also connected photoresistance and LED warning lamp with control output end, in the time that current transformer (11) senses that current signal and photoresistance detect that light is weak, photoresistance sends signal to MCU processor, MCU processor control LED warning lamp is bright, and photoresistance is connected power supply with LED warning lamp;
(6) after line fault instruction, staff indicates and overhauls according to line fault, after maintenance, reset by the hand-reset button 4 on base 2, or control to realize according to the time of setting by MCU processor and automatically reset, hand-reset button 4 connects MCU processor by reset circuit, and reset circuit connects power supply.
Embodiment 1:
As Fig. 1, Fig. 2, shown in Figure 10, current transformer 11 and control circuit board 10 are installed on the base of shaft tower transmission line malfunction indicator described in the utility model, MCU processor and the power-switching circuit module being connected with MCU processor are set on control circuit board 10, filter rectification amplifying circuit module, board turning indicator motor positive and inverse drive circuit module, photoresistance circuit link block, LED warning light circuit link block and reset circuit module, current sensor 11 connects MCU processor by filter rectification amplifying circuit module, MCU processor makes board turning indicator motion by drive motor positive and negative rotation circuit, in the time that light is darker, not obvious in order to prevent the instruction of board turning indicator, bright by MCU processor control LED warning lamp, light signal detects by photoresistance, power supply is 3.3V by power conversion chip by the voltage transitions of 6V in use, reduce power consumption.
Concrete circuit connects as described below:
As Figure 3-Figure 4, the secondary current output terminal parallel resistance R27 of current transformer 11, variable resistor R26 and capacitor C 6, convert the current signal detecting to voltage signal by resistance R 27 and variable resistor R26, then carry out filtering by capacitor C 6, filtered voltage signal is by the reverse input end of resistance R 24 concatenation operation amplifier U3A, simultaneously by the reverse input end of resistance R 20 concatenation operation amplifier U3B, the output terminal of operational amplifier U3A is by the reverse input end of diode D2 concatenation operation amplifier U3A, the output terminal of operational amplifier U3A is by the reverse input end of diode D3 and variable resistor R25 concatenation operation amplifier U3A, the output terminal of operational amplifier U3A is by the reverse input end of diode D3 and resistance R 28 concatenation operation amplifier U3B, the output terminal of operational amplifier U3B is by the reverse input end of capacitor C 5 concatenation operation amplifier U3B, the output terminal of operational amplifier U3B is by the reverse input end of variable resistor R23 concatenation operation amplifier U3B simultaneously, the output terminal of operational amplifier U3B connects the P1.0 port of MCU processor, the positive input of operational amplifier U3B connects the P1.1 port of MCU processor, and operational amplifier U3A is connected 3.3V power supply with operational amplifier U3B.
MCU processor is analyzed and is processed after receiving the electric signal of current transformer 11, MCU processor drives board turning indicator to carry out board turning action by motor positive and inverse driving circuit, motor positive and inverse driving circuit is conventional driving circuit, as shown in Figure 6, motor positive and inverse driving circuit connects respectively the P1.5 of MCU processor, P2.0, P2.1, P2.2 port.
As shown in Figure 7, photoresistance R21 one end ground connection, after other end resistance in series R15, connect 3.3V power supply, photoresistance R21 is connected the P1.6 port of MCU processor with the common port of resistance R 15, photoresistance converts the strong and weak signals of light to electric signal, send electric signal to MCU processor, MCU processor is analyzed and is processed after receiving electric signal, and controls the on and off of LED warning lamp.
As shown in Figure 8, LED warning lamp resistance in series R17, resistance R 16 and the rear ground connection of switch S 2, resistance R 17 is connected 3.3V power supply with the common port of resistance R 16, and resistance R 16 is connected the P2.3 port of MCU processor with the common port of switch S 2.
As shown in Figure 9, hand-reset button S1 two ends shunt capacitance C3, simultaneously also in parallel with the series arm of resistance R 18 and capacitor C 4, a common port of hand-reset button S1 and capacitor C 3 is connected 3.3V power supply by resistance R 14, another common end grounding; Resistance R 18 is connected the RST port of MCU processor with the common port of capacitor C 4.
The power supply that the utility model adopts is the 3V button cell of two series connection, as shown in Figure 5, the anodal input end that connects power transfer module after two button cell series connection, minus earth, the input end of power transfer module is also by capacitor C 2 ground connection, the GND end ground connection of power transfer module, the PG end of power transfer module connects the 3.3V output terminal of power transfer module by resistance R 3, the 3.3V output terminal of power transfer module is also by capacitor C 1 ground connection, and 3.3V power output end connects MCU processor after by capacitor C 7 filtering.
Embodiment 2:
As shown in figure 11, on the basis of embodiment 1, on MCU processor, connect wireless radio-frequency communication module.Wireless radio-frequency communication module by gsm module as output executing mechanism, the positional information of the transmitting shaft tower of the plug-in control signal by MCU processor, as line name, electric pressure and shaft tower number etc., positional information can be arranged in the plug-in of MCU processor in advance.When transmission line of electricity normally moves no current and flows through, device is in dormant state, low in energy consumption, in the time that generation earth fault has electric current to flow through shaft tower, this device is carried out the action of embodiment 1, it is board turning indicator motion, LED warning lamp is indicated the detection case of light according to photoresistance, MCU processor is also controlled wireless radio-frequency communication module and is sent shaft tower positional information on far-end receiving system or mobile terminal simultaneously, dock with power grid GIS Geographic Information System, realize the Real-Time Monitoring of fault shaft tower position and locate fast.
The utility model O&M personnel in the time there is ground short circuit fault can know shaft tower position, trouble spot according to remote transfer signal without the walkaround inspection that is on the scene, directly rush towards abort situation and rush to repair elimination, save the time that transmission line malfunction is searched, greatly shorten clearing time of fault, reduced loss of outage and manually searched cost.
Claims (6)
1. a shaft tower transmission line malfunction indicator, it is characterized in that: comprise base (2), current transformer (11) and the control circuit board (10) being connected with power supply (8) are set on base (2), the upper welding of control circuit board (10) MCU processor, the secondary current output terminal of current transformer (11) is connected the signal input part of MCU processor with amplifying circuit by the current rectifying and wave filtering circuit on control circuit board (10), the signal input part of MCU processor also connects photoresistance (9), the control output end of MCU processor connects respectively board turning indicator (3) and LED warning lamp (6), base (2) top arranges semicircle shell (1), on semicircle shell (1), display window (7) is set, display window (7) and the upper board turning indicator (3) arranging of base (2), LED warning lamp (6) and photoresistance (9) are corresponding.
2. shaft tower transmission line malfunction indicator according to claim 1, it is characterized in that: hand-reset button (4) and testing button (5) are set on described base (2), and hand-reset button (4) is connected MCU processor by the reset circuit on control circuit board (10) respectively with testing button (5) with test circuit.
3. shaft tower transmission line malfunction indicator according to claim 1, is characterized in that: described power supply (8) adopts button cell.
4. shaft tower transmission line malfunction indicator according to claim 1, is characterized in that: described semicircle shell (1) inner side arranges screen layer.
5. shaft tower transmission line malfunction indicator according to claim 1, is characterized in that: described MCU processor adopting MSP430.
6. shaft tower transmission line malfunction indicator according to claim 1, is characterized in that: described MCU processor also connects wireless radio-frequency communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239376.3U CN203894362U (en) | 2014-05-12 | 2014-05-12 | Fault indicator of tower power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239376.3U CN203894362U (en) | 2014-05-12 | 2014-05-12 | Fault indicator of tower power transmission line |
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| Publication Number | Publication Date |
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| CN203894362U true CN203894362U (en) | 2014-10-22 |
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| CN201420239376.3U Expired - Fee Related CN203894362U (en) | 2014-05-12 | 2014-05-12 | Fault indicator of tower power transmission line |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007362A (en) * | 2014-05-12 | 2014-08-27 | 国家电网公司 | Pole and tower power transmission line fault indicator |
| CN106501657A (en) * | 2016-10-12 | 2017-03-15 | 国网上海市电力公司 | A kind of monitoring system of electric distribution network overhead wire failure |
| CN106501656A (en) * | 2016-10-12 | 2017-03-15 | 国网上海市电力公司 | A kind of on-line acquisition system of distribution line failure waveform |
| CN106501671A (en) * | 2016-10-12 | 2017-03-15 | 国网上海市电力公司 | A kind of monitoring method of electric distribution network overhead wire failure |
| CN106556754A (en) * | 2016-10-12 | 2017-04-05 | 国网上海市电力公司 | A kind of online acquisition method of distribution line failure waveform |
| CN106556766A (en) * | 2016-10-11 | 2017-04-05 | 国网上海市电力公司 | A kind of distribution network failure monitoring system based on distribution line multidate information |
| CN106569089A (en) * | 2016-10-11 | 2017-04-19 | 国网上海市电力公司 | Power distribution line dynamic Information-based power distribution network fault monitoring method |
-
2014
- 2014-05-12 CN CN201420239376.3U patent/CN203894362U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007362A (en) * | 2014-05-12 | 2014-08-27 | 国家电网公司 | Pole and tower power transmission line fault indicator |
| CN106556766A (en) * | 2016-10-11 | 2017-04-05 | 国网上海市电力公司 | A kind of distribution network failure monitoring system based on distribution line multidate information |
| CN106569089A (en) * | 2016-10-11 | 2017-04-19 | 国网上海市电力公司 | Power distribution line dynamic Information-based power distribution network fault monitoring method |
| CN106501657A (en) * | 2016-10-12 | 2017-03-15 | 国网上海市电力公司 | A kind of monitoring system of electric distribution network overhead wire failure |
| CN106501656A (en) * | 2016-10-12 | 2017-03-15 | 国网上海市电力公司 | A kind of on-line acquisition system of distribution line failure waveform |
| CN106501671A (en) * | 2016-10-12 | 2017-03-15 | 国网上海市电力公司 | A kind of monitoring method of electric distribution network overhead wire failure |
| CN106556754A (en) * | 2016-10-12 | 2017-04-05 | 国网上海市电力公司 | A kind of online acquisition method of distribution line failure waveform |
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| CF01 | Termination of patent right due to non-payment of annual fee |