CN205539294U - Insulator leakage current monitoring devices based on plastic fiber - Google Patents
Insulator leakage current monitoring devices based on plastic fiber Download PDFInfo
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- CN205539294U CN205539294U CN201620050470.3U CN201620050470U CN205539294U CN 205539294 U CN205539294 U CN 205539294U CN 201620050470 U CN201620050470 U CN 201620050470U CN 205539294 U CN205539294 U CN 205539294U
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Abstract
The utility model discloses an insulator leakage current monitoring devices based on plastic fiber, including leakage current collection system, fiber optic current sensor, the host system who connects gradually, leakage current collection system gathers the ring and fixes on the steel cap of insulator through the jackscrew including installing at insulator collection ring on the surface. The problem of among the prior art leakage current sensor receive that strong electromagnetic interference is big, the monitoring node needs external power supply etc is solved.
Description
Technical field
This utility model belongs to transmission line of electricity on-line monitoring technique field, relates to a kind of insulator leakage current monitoring device based on plastic optical fiber.
Background technology
Insulator plays an important role in overhead transmission line, in order to increase creep age distance, ultra-high-tension power transmission line is mounted with insulator chain.Insulator leakage current refers to get dirty under working voltage and flows through the electric current of insulator surface after surface wetting.Either on transmission line of electricity (TL) distribution line the most out of doors, any high voltage insulator all can produce leakage current.The filth being deposited on insulator surface is mainly flue dust, ashes, and the regional chemicals produced of industrialization and salt fog near seashore.Under moist atmospheric condition, the filth of insulator surface can be dissolved in the water and for leakage current provide one from high pressure to earthy path.Although these size of current are within allowable current size, but when being multiplied by the insulator sum being positioned at special transmission circuit, total current can reach the highest value, and the protective relaying device of joint can excise the fault producing heavy current circuit, causes power outage.
Additionally, dew at night or light rain increase the electrical conductivity of pollution layer, thus produce electric arc.Time serious, these electric arcs may become insulation flashover, when the ionization of insulator surrounding air becomes conductor, even causes the damage of whole insulator.Therefore, insulator leakage current is one of important symbol weighing electrical apparatus insulation quality, and as the instruction parameter of pollution flashover accident, is particularly important in the predictive maintenance of insulator is planned.
At present, being widely used monitoring the method for the leakage current of electric transmission line isolator, corresponding leakage current sensor is also an emphasis of research.Current sensor mainly has two kinds, and a kind of is the conventional current sensors (CT) based on electromagnetic induction, but traditional current sensor has the most a series of defect: blast causes catastrophic failure；Major break down electric current causes iron core magnetic saturated；Iron core resonance effect；Hysteresis effect；Volume is big, weight is big, expensive etc., be difficult to meet the development need of new-generation digital power network.Another kind is current sensor based on optical fiber, and compared with tradition sensing technology, fibre optic current sensor mainly has following several big advantage: lightweight, compact conformation, easily multiplex；At sensing point without electricity consumption, can long-distance distributed sense；Can low cost large-scale production.At home, the optical fiber used by most of monitoring system communications optical cables, it is essentially all employing silica fibre, is that the extra high quartz glass of one purity is (with SiO2For main component) the fibrous waveguiding structure that makes, but it is relatively costly, and coupling loss is the biggest.
Utility model content
The purpose of this utility model is to provide a kind of insulator leakage current monitoring device based on plastic optical fiber, solves in prior art that leakage current sensor is big by strong electromagnetic, monitoring node needs the problems such as external power supply.
This utility model be the technical scheme is that a kind of insulator leakage current monitoring device based on plastic optical fiber, including the leakage current collection device being sequentially connected with, fibre optic current sensor, main control module, leakage current collection device includes the collection ring being arranged on insulator surface, gathers ring and is fixed on the steel cap of insulator by jackscrew.
Feature of the present utility model also resides in:
Fibre optic current sensor includes full-wave bridge rectifier circuit and the plastic optical fiber being made up of multiple diodes.
The structure of full-wave bridge rectifier circuit is, JP1 is the input/output terminal of signal, and JP1 interface is connected in series with resistance R1 and inductance L1, prevents high-frequency signal from passing through；Inductance L1 is followed by the full bridge rectifier being made up of four diodes D2-1, D2-2, D2-3, D2-4, accesses light emitting diode D1 at the two ends of diode D2-3 and D2-4；Two transient voltage suppressor diodes D3, D4 it are incorporated at the two ends of resistance R1, full-wave bridge rectifier circuit.
Current sensor is fixed on Ta Liangshang by fixing aluminium sheet, and the fiber optic cables that wherein plastic optical fiber is wrapped with insulation composite with outside are connected, and current sensor is also connected with plastic optical fiber；The leakage current that copper cash is sensed for guiding leakage current collection device.
Main control module includes signal processing unit, photodetector and data-interface, and signal processing unit is connected with photodetector and data-interface respectively, and data-interface is also connected with photodetector；Signal processing unit connects has CPU, CPU and GPRS modem, data storage cell and power supply to be connected respectively, and CPU is also connected with each other with power supply.
Power supply is accumulator.
Main control module is arranged in the casing of aluminum, is provided with antenna and cable interface outside casing, and antenna connects with GPRS modem, and cable interface is placed in the lower left in aluminum tank front, is connected with plastic optical fiber.
The beneficial effects of the utility model are: this utility model uses new material plastic optical fiber (POF), make fibre optic current sensor, and use it in monitoring leakage current device, coordinate with harvester and main control module, can solve in prior art that leakage current sensor is big by strong electromagnetic, monitoring node needs the problems such as external power supply.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of insulator leakage current monitoring device based on plastic optical fiber of this utility model；
Fig. 2 is the mounting structure schematic diagram of leakage current collection device in a kind of insulator leakage current monitoring device based on plastic optical fiber of this utility model；
Fig. 3 is the installation site schematic diagram of leakage current collection device in a kind of insulator leakage current monitoring device based on plastic optical fiber of this utility model；
Fig. 4 is the hardware architecture diagram of the fibre optic current sensor in a kind of insulator leakage current monitoring device based on plastic optical fiber of the present utility model；
Fig. 5 is the scheme of installation of the fibre optic current sensor in a kind of insulator leakage current monitoring device based on plastic optical fiber of the present utility model；
Fig. 6 is the outside overall structure schematic diagram of main control module in a kind of insulator leakage current monitoring device based on plastic optical fiber of the present utility model.
In figure, 1. leakage current collection device, 2. fibre optic current sensor, 2-1. full-wave bridge rectifier circuit, 2-2. plastic optical fiber, 3. main control module, 3-1. data-interface, 3-2. photodetector, 3-3. signal processing unit, 3-4.CPU, 3-5. power supply, 3-6.GPRS modem, 3-7. data storage cell；1-1. gathers ring；1-2. insulator surface；1-3. jackscrew；Being wrapped with the fiber optic cables of insulation composite, 2-4. copper cash outside 2-3., 2-5. fixes aluminium sheet, 4. tower beam；Casing；6. cable interface；7. antenna.
Detailed description of the invention
With detailed description of the invention, this utility model is described in detail below in conjunction with the accompanying drawings.
A kind of insulator leakage current monitoring device based on plastic optical fiber of this utility model, as shown in Figure 1, including the leakage current collection device 1 being sequentially connected with, fibre optic current sensor 2, main control module 3, wherein, leakage current collection device 1 includes the collection ring 1-1 being arranged on insulator surface 1-2, gathers ring and is fixed on the steel cap of insulator by jackscrew 1-3；
As shown in Figure 3, collection ring 1-1 in leakage current collection device is installed at the suspension of insulator, in humid conditions, during porcelain insulator string surface attachment filth, its surface produces leakage current, current passes through isolator substring, flows into the earth through shaft tower, and now leakage current collection device will sense leakage current.
Wherein, fibre optic current sensor 2 includes full-wave bridge rectifier circuit 2-1 and the plastic optical fiber 2-2 being made up of multiple diodes,
As shown in Figure 4, JP1 is the input/output terminal of signal to the structure of full-wave bridge rectifier circuit 2-1, and JP1 interface is connected in series with resistance R1 and inductance L1, prevents high-frequency signal from passing through；Inductance L1 is followed by the full bridge rectifier being made up of four diodes D2-1, D2-2, D2-3, D2-4, accesses light emitting diode (LED) D1 at the two ends of diode D2-3 and D2-4；Two transient voltage suppressor diodes (TVS) D3, D4 it are incorporated at the two ends of resistance R1, full-wave bridge rectifier circuit.
The full-wave bridge rectifier circuit of the Diode series composition of sensor internal, when the leakage current of certain polarity of leakage current can order about light emitting diode (LED) luminescence, but the leakage current of another polarity the most corresponding cannot be through light emitting diode, and the half cycles leakage current of these reversed polarity just cannot flow through light emitting diode D1 smoothly.Therefore this utility model utilizes the unidirectional general character of diode, using the full-wave bridge rectifier circuit being made up of four diodes, full-wave rectifying circuit will leak out electric current and is changed into unidirectional current, is subsequently used for driven for emitting lights diode.If the positive half-wave of leakage current, i.e. when leakage current flows into from JP1, its positive half-wave flows into from two, the top of JP1 interface and first passes through RL bandwidth-limited circuit, then luminous by D2-2 driven for emitting lights diode D2, then by flowing out from following two interfaces of JP1 after D2-4；If the negative half-wave of leakage current, i.e. when leakage current flows into from JP1, it is similar with negative half-wave that its negative half-wave flows into principle circuit from following two interfaces of JP1.Two transient voltage suppressor diodes (TVS) D3, D4 can occur reducing resistance during high backward voltage in circuit, make current distributing, thus other components and parts in protection circuit are not burned out in the case of transient voltage is too high.
As shown in Figure 5, current sensor 2 is fixed on tower beam 2-6 by fixing aluminium sheet 2-5, the fiber optic cables 2-3 that wherein plastic optical fiber (POF) 2-2 is wrapped with insulation composite with outside is connected, and current sensor 2 is also connected with plastic optical fiber (POF) 2-2；The leakage current that copper cash 2-4 is sensed for guiding leakage current collection device.
Wherein, main control module 3 includes signal processing unit 3-3, photodetector 3-2 and data-interface 3-1, and signal processing unit 3-3 is connected with photodetector 3-2 and data-interface 3-1 respectively, and data-interface 3-1 is also connected with photodetector 3-2；Signal processing unit 3-3 connects has CPU3-4, CPU3-4 and GPRS modem 3-6, data storage cell 3-7 and power supply 3-5 to be connected respectively, and CPU3-4 is also connected with each other with power supply 3-5, and power supply 3-5 is accumulator.
Main control module 3 is arranged in aluminum tank 5 as shown in Figure 6, casing 5 is outside is provided with antenna 7 and cable interface 6, antenna 7 connects with GPRS modem 3-6, and cable interface 6 is placed in the lower left in aluminum tank 5 front, is connected with plastic optical fiber (POF) 2-2.
This utility model is mainly made up of leakage current collection device, fibre optic current sensor, main control module；Leakage current collection device is connected with fibre optic current sensor；Temperature Humidity Sensor is connected with main control module with fibre optic current sensor；Main control module includes data-interface, photodetector, signal processing unit, interconnective CPU, power supply, GPRS modem, data storage cell；Data-interface is connected with plastic optical fiber (POF)；Signal processing unit is connected to photodetector and data-interface respectively；CPU with GPRS modem, data storage cell and power supply (accumulator) are connected.
Leakage current collection device is ring-type, is made up of two nylon snap rings, is provided with draw-in groove bottom snap ring, and collecting ring, built with current collection line, is fixed on steel cap by draw-in groove by the solid screw in top.
Fibre optic current sensor is its power supply without external power supply, and leakage current is through being directed to flow past and excite its internal light emitting diode (LED) luminous, it is achieved converting electrical energy into luminous energy, the output of light emitting diode is directly proportional to its direct current.
The photodetector of main control module part is responsible for receiving the optical signal transmitted by plastic optical fiber (POF), and optical signal is become the signal of telecommunication by photodetector, transmits a signal to signal processing unit by cable interface the most again；Signal processing unit carries out noise reduction process to optimize output result to the signal of telecommunication.The CPU of main control module is by stored along in memory together with the insulator local temperature measured by Temperature Humidity Sensor and relative air humidity (digital signal) for the signal of telecommunication demodulated, after being processed by a series of calculating again, by GPRS modem, data are transferred to cellular communications networks.
The utility model proposes and use a kind of nearly new material developed for 2 years: plastic optical fiber (POF), the optical fiber that it is made with a kind of light penetrating copolymer, the simple drawing process that polymer is ripe can be utilized, therefore cost ratio is relatively low, and it is soft, firm, it is relatively large in diameter (about reaching 1mm), compared with silica fibre, have the advantage that modulus is low, core diameter is big (0.3-1.0mm), can use simple POF adapter when continuing, even the deviation that fibre junction center alignment produces 30 μm does not interferes with coupling loss yet；Numerical aperture is big (about NA0.5), and acceptance angle is up to 60 °, and silica fibre only has 16 °, and coupling efficiency is high；Flexibility is good, it is easy to processes and uses；Low loss window is had in visible region；Lightweight；Cost and processing charges are low.
Claims (7)
1. an insulator leakage current monitoring device based on plastic optical fiber, it is characterized in that, including the leakage current collection device (1) being sequentially connected with, fibre optic current sensor (2), main control module (3), described leakage current collection device (1) includes the collection ring (1-1) being arranged on insulator surface (1-2), and described collection ring is fixed on the steel cap of insulator by jackscrew (1-3).
Insulator leakage current monitoring device based on plastic optical fiber the most according to claim 1, it is characterized in that, described fibre optic current sensor (2) includes full-wave bridge rectifier circuit (2-1) and the plastic optical fiber (2-2) being made up of multiple diodes.
Insulator leakage current monitoring device based on plastic optical fiber the most according to claim 2, it is characterized in that, the structure of described full-wave bridge rectifier circuit (2-1) is, JP1 is the input/output terminal of signal, JP1 interface is connected in series with resistance R1 and inductance L1, prevents high-frequency signal from passing through；Inductance L1 is followed by the full bridge rectifier being made up of four diodes D2-1, D2-2, D2-3, D2-4, accesses light emitting diode D1 at the two ends of diode D2-3 and D2-4；Two transient voltage suppressor diodes D3, D4 it are incorporated at the two ends of resistance R1, full-wave bridge rectifier circuit.
Insulator leakage current monitoring device based on plastic optical fiber the most according to claim 2, it is characterized in that, described current sensor (2) is fixed on tower beam (2-6) by fixing aluminium sheet (2-5), the fiber optic cables (2-3) that wherein plastic optical fiber (2-2) is wrapped with insulation composite with outside are connected, and current sensor (2) is also connected with plastic optical fiber (2-2)；The leakage current that copper cash (2-4) is sensed for guiding leakage current collection device.
Insulator leakage current monitoring device based on plastic optical fiber the most according to claim 1, it is characterized in that, described main control module (3) includes signal processing unit (3-3), photodetector (3-2) and data-interface (3-1), described signal processing unit (3-3) is connected with photodetector (3-2) and data-interface (3-1) respectively, and described data-interface (3-1) is also connected with photodetector (3-2)；Described signal processing unit (3-3) connects CPU (3-4), CPU (3-4) is connected respectively with GPRS modem (3-6), data storage cell (3-7) and power supply (3-5), and CPU (3-4) is also connected with each other with power supply (3-5).
Insulator leakage current monitoring device based on plastic optical fiber the most according to claim 5, it is characterised in that power supply (3-5) is accumulator.
Insulator leakage current monitoring device based on plastic optical fiber the most according to claim 1, it is characterized in that, described main control module (3) is arranged in the casing (5) of aluminum, described casing (5) is outside is provided with antenna (7) and cable interface (6), described antenna (7) connects with GPRS modem (3-6), described cable interface (6) is placed in the lower left in aluminum tank (5) front, is connected with plastic optical fiber (2-2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620050470.3U CN205539294U (en) | 2016-01-19 | 2016-01-19 | Insulator leakage current monitoring devices based on plastic fiber |
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| CN201620050470.3U CN205539294U (en) | 2016-01-19 | 2016-01-19 | Insulator leakage current monitoring devices based on plastic fiber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188053A (en) * | 2018-09-25 | 2019-01-11 | 国网黑龙江省电力有限公司佳木斯供电公司 | High-power transformer iron core grounding current on-line monitoring system |
| CN110146795A (en) * | 2019-06-05 | 2019-08-20 | 国网黑龙江省电力有限公司电力科学研究院 | The device that a kind of pair of insulator arc-over failure is detected automatically |
-
2016
- 2016-01-19 CN CN201620050470.3U patent/CN205539294U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188053A (en) * | 2018-09-25 | 2019-01-11 | 国网黑龙江省电力有限公司佳木斯供电公司 | High-power transformer iron core grounding current on-line monitoring system |
| CN110146795A (en) * | 2019-06-05 | 2019-08-20 | 国网黑龙江省电力有限公司电力科学研究院 | The device that a kind of pair of insulator arc-over failure is detected automatically |
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