CN205920148U - High frequency current sensor for measurement of partial discharge - Google Patents
High frequency current sensor for measurement of partial discharge Download PDFInfo
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- CN205920148U CN205920148U CN201620468024.4U CN201620468024U CN205920148U CN 205920148 U CN205920148 U CN 205920148U CN 201620468024 U CN201620468024 U CN 201620468024U CN 205920148 U CN205920148 U CN 205920148U
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- magnetic core
- high frequency
- frequency current
- partial discharge
- split type
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- 238000005259 measurement Methods 0.000 title claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 230000004888 barrier function Effects 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005755 formation reaction Methods 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 25
- 230000035945 sensitivity Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 229960001866 silicon dioxide Drugs 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The utility model discloses a high frequency current sensor for measurement of partial discharge, it includes metal shielding shell and pickup assembly, metal shielding shell constitutes by two split type half box, and two half box split type one end are articulated by the hinge, and it is articulated that the other end passes through the hasp, axial round hole of two half box split type closed back intermediate formations, the outside is regular octagon, the magnetic core groove of semi -ring type is seted up to half box split type its circumferencial direction of edge, is equipped with the apron above the magnetic core groove, pickup assembly winds the coil that has 3 numbers of turns different including the semi -ring type magnetic core of locating the magnetic core inslot, each semi -ring type magnetic core, and every coil both ends is connected with the signal output part mouth respectively. The utility model discloses can be applicable to complicated testing ring border better, improve the ability that high frequency signal was put in sensor seizure office effectively, make high frequency current method detection streamer partial discharge's effect and practicality strengthen greatly.
Description
Technical field
This utility model is related to a kind of current sensor, and especially one kind is used for high voltage electric equipment and cable local discharge
The magnetic coupling HF current transformer of test.
Background technology
In the Partial Discharge Detection of transformer station's high-voltage electrical equipment, except supercritical ultrasonics technology and hyperfrequency method can be used straight
Connect the shelf depreciation to high voltage electric equipment and measure outer it is also possible to be flowed during shelf depreciation by producing to high voltage electric equipment
The detection of high-frequency current signal crossing the earth lead of high voltage electric equipment is detecting the shelf depreciation situation in high-voltage electrical equipment.
At present, put in Site Detection and on-line monitoring in transformator and high tension cable office, having arrived of high frequency electric method more widely should
With.
High Frequency Current Sensor detects the sensor element of shelf depreciation as high frequency electric detection method, and mainly face asks
Topic is extraneous High-frequency Interference and the width of frequency range and sensitivity is not enough.Particularly High Frequency Current Sensor is mainly used at this stage
In the Partial Discharge Detection of cable, sensor can only be installed on cable connector or terminal earth lead, cable local discharge distance
Test point distance differs, and after transmission, signal intensity and frequency reduce the high frequency electric that shelf depreciation produces；Pass in test point
There is great difference because of point of discharge distance in high-frequency current signal intensity that sensor receives and frequency.Therefore high frequency electric
Sensor must have frequency band as wide as possible, to avoid missing the Partial discharge signal in some frequency ranges.However, wide frequency band
Scope always brings low sensitivity.Therefore synchronous raising sensitivity and bandwidth are the keys needing in sensor design to solve
Problem.
Utility model content
The technical problems to be solved in the utility model is a kind of High Frequency Current Sensor for shelf depreciation test, its tool
Have the characteristics that to detect that bandwidth, sensitivity are high.
For solving above-mentioned technical problem, technical solution adopted in the utility model is: a kind of measurement of partial discharge is high
Frequency current sensor, its key technology is: it includes Metal shielding shell and sensor cluster；
Described Metal shielding shell is made up of two split type half boxes, and one end of described two split type half boxes is by hinge
Hinged, it is hinged that the other end passes through hasp；The circular hole of one axial direction of intermediate formation after two split type half box closures, outside is positive eight
Side shape；
Described split type half box offers half ring-like magnetic core groove along its circumferencial direction, is provided with lid above described magnetic core groove
Plate；
Described sensor cluster includes half ring type magnetic core in magnetic core groove, and each half ring type magnetic core is wound with 3 circles
The different coil of number, wherein 6 sides of described Metal shielding shell is respectively equipped with signal output port, each coil two ends is divided
It is not connected with signal output port；It is filled with insulating barrier in gap between described magnetic core groove and half ring type magnetic core.
Described magnetic core groove is half ring-like groove.
Described insulating barrier forms by poured with epoxy resin or by silica gel pad.
Described half ring type magnetic core is nickel-zinc ferrite.
6 signal output ports correspond to 20k-1mhz, 1m-30mhz, 30-100mhz, 100m-200mhz, 200m- respectively
The detection frequency band of 500mhz, 500m-700mhz.
Operation principle of the present utility model is: operationally, two split type half boxes are around hinge for this High Frequency Current Sensor
Engage page to open, shielding box is placed on earth cable, close hinge, buckle hasp to close metal shielding box.Micro- in cable
Weak high-frequency current signal senses the magnetic field generating respective change in magnetic core, and the magnetic field of this change senses generation phase in coil
The voltage that should change, this induced voltage exports through signal output port.By detecting the sensing of unlike signal output port respectively
Voltage, can detect the local discharge signal in high tension cable in the range of EHF band.
Have the beneficial effects that using produced by technique scheme:
This utility model compared with existing same type of sensor, its bandwidth, sensitivity is high.High frequency can be low to 700mhz
Frequency can be to 20khz, maximum sensitivity -40dbm, average sensitivity -20dbm.High Frequency Current Sensor described in the utility model
The test environment of complexity can be preferably applied to, be effectively improved the ability that high-frequency signal is put in sensor seizure office, make high frequency
Current method detects that the effect of cable local discharge and practicality greatly enhance.
Brief description
Fig. 1 is this utility model structural representation；
Fig. 2 partly cuts open left view schematic diagram for this utility model.
Specific embodiment
Below in conjunction with Figure of description and instantiation High Frequency Current Sensor described in the utility model is made into
The explanation of one step and explanation.
As illustrated in fig. 1 and 2, the present embodiment: sensor is made up of Metal shielding shell and sensor cluster two parts.
It is octagon outside Metal shielding shell, inner side is circular port 12；Metal shielding shell include two split type
Half box 1, described split type half box 1 one end is hinged by hinge 5, and it is hinged that the other end passes through hasp 6；Described split type half box 1
By having the magnetic core groove 2 of half ring-like groove along inner side semicircle circumference and thin cover plate 3 forms；Magnetic core groove 2 and thin cover plate 3 pass through number
Individual installation screw hole 7 is fixed with installing screw connection；Form half ring shaped slot, this semi-circular between described magnetic core groove 2 and cover plate 3
Groove is magnetic core groove 2.Described magnetic core groove 2 be respectively arranged at two ends with a location hole 10 and a locating pin 11, when folding two is split type
The effect of positioning is played during half box 1；Sensor cluster is made up of half ring type magnetic core 8, coil and signal output port 4；Described
Semi-circular magnetic core 8 is arranged in semi-ring magnetic core groove 2, the gap 9 insulant epoxy between half ring type magnetic core 8 and magnetic core groove 2
Resin embedding or with insulate silicagel pad filling；3 groups of numbers of turn differences, winding wires diameters are all wound with half described ring type magnetic core 8
Also different coil, on the signal output port 4 that the two ends of each coil are all connected to be fixed on 1 on split type half box.Letter
Number output port 4, on the six of which side of Metal shielding shell, is provided with not setting on hinge 5 and two sides of hasp 6
Put.Two semi-circular magnetic cores 8 are spliced into a ring-shaped magnetic core.
High Frequency Current Sensor described in the present embodiment, when using, sensor hasp 6 is opened, is enclosed within tested cable
On terminal earth lead；Using characteristic impedance for 20-100 ohm coaxial cable signal that 6 signal output ports 4 are exported according to
Secondary it is connected on signal measurement apparatus.The frequency band range of different Port detectings is different, 6 signal output ports can detect across
The high-frequency current signal of degree this pole broad frequency range of 20k-700mhz.High Frequency Current Sensor uniqueness described in the present embodiment
Design is it is ensured that each frequency band is respectively provided with high sensitivity.After core material and core cross section amass and fix, detect frequency band
Width is main to be wound around the number of turn and coil diameter, material with coil and insulate directly related.
High Frequency Current Sensor described in the utility model has 6 signal output ports, corresponds to 20k-1mhz, 1m- respectively
The detection frequency band of 30mhz, 30-100mhz, 100m-200mhz, 200m-500mhz, 500m-700mhz.Due to each frequency band model
Enclose relative narrower it is ensured that sensitivity in this frequency band range.
These are only specific embodiment of the utility model.Those skilled in the art is from this utility model disclosure
The all deformation directly derived or associate, all should belong to protection domain of the present utility model.
Claims (5)
1. a kind of measurement of partial discharge High Frequency Current Sensor it is characterised in that: it includes Metal shielding shell and sensor
Assembly；
Described Metal shielding shell is made up of two split type half boxes (1), and one end of two split type half boxes (1) is by hinge (5)
Hinged, it is hinged that the other end passes through hasp (6)；The circular hole (12) of one axial direction of intermediate formation after two split type half box (1) closures,
Outside is octagon；
Described split type half box (1) offers half ring-like magnetic core groove (2) along its circumferencial direction, and described magnetic core groove (2) sets above
There is thin cover plate (3)；
Described sensor cluster includes half ring type magnetic core (8) in magnetic core groove (2), and each half ring type magnetic core (8) is wound with 3
The different coil of the individual number of turn, wherein 6 sides of described Metal shielding shell are respectively equipped with signal output port (4), each line
Circle two ends are connected with signal output port (4) respectively；Fill out in gap (9) between described magnetic core groove (2) and half ring type magnetic core (8)
It is filled with insulating barrier.
2. measurement of partial discharge High Frequency Current Sensor according to claim 1 it is characterised in that: described magnetic core groove
(2) it is half ring-like groove.
3. measurement of partial discharge High Frequency Current Sensor according to claim 1 it is characterised in that: described insulating barrier
Form by poured with epoxy resin or by silica gel pad.
4. measurement of partial discharge High Frequency Current Sensor according to claim 3 it is characterised in that: described half ring-like magnetic
Core (8) is nickel-zinc ferrite.
5. the measurement of partial discharge High Frequency Current Sensor according to any one of claim 1-4 it is characterised in that: 6
Signal output port (4) corresponds to 20k-1mhz, 1m-30mhz, 30-100mhz, 100m-200mhz, 200m-500mhz respectively,
The detection frequency band of 500m-700mhz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620468024.4U CN205920148U (en) | 2016-05-20 | 2016-05-20 | High frequency current sensor for measurement of partial discharge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620468024.4U CN205920148U (en) | 2016-05-20 | 2016-05-20 | High frequency current sensor for measurement of partial discharge |
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| Publication Number | Publication Date |
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| CN205920148U true CN205920148U (en) | 2017-02-01 |
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| CN201620468024.4U Active CN205920148U (en) | 2016-05-20 | 2016-05-20 | High frequency current sensor for measurement of partial discharge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108231385A (en) * | 2018-03-22 | 2018-06-29 | 国家海洋技术中心 | The ocean inductively underwater magnet ring of data transmission |
| CN109655723A (en) * | 2018-12-29 | 2019-04-19 | 国网江苏省电力有限公司电力科学研究院 | A kind of partial discharge detecting sensor for high-tension current inductor |
| CN110376495A (en) * | 2019-07-24 | 2019-10-25 | 全球能源互联网研究院有限公司 | A kind of partial discharge detecting sensor and its manufacturing method |
| CN113791302A (en) * | 2021-08-05 | 2021-12-14 | 深圳供电局有限公司 | Sensor for partial discharge and synchronous positioning |
-
2016
- 2016-05-20 CN CN201620468024.4U patent/CN205920148U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108231385A (en) * | 2018-03-22 | 2018-06-29 | 国家海洋技术中心 | The ocean inductively underwater magnet ring of data transmission |
| CN109655723A (en) * | 2018-12-29 | 2019-04-19 | 国网江苏省电力有限公司电力科学研究院 | A kind of partial discharge detecting sensor for high-tension current inductor |
| CN109655723B (en) * | 2018-12-29 | 2024-03-08 | 国网江苏省电力有限公司电力科学研究院 | Partial discharge detection sensor for high-voltage current transformer |
| CN110376495A (en) * | 2019-07-24 | 2019-10-25 | 全球能源互联网研究院有限公司 | A kind of partial discharge detecting sensor and its manufacturing method |
| CN113791302A (en) * | 2021-08-05 | 2021-12-14 | 深圳供电局有限公司 | Sensor for partial discharge and synchronous positioning |
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