CN210199237U - Ring main unit partial discharge detection device based on transformation of electrified display - Google Patents
Ring main unit partial discharge detection device based on transformation of electrified display Download PDFInfo
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- CN210199237U CN210199237U CN201920934527.XU CN201920934527U CN210199237U CN 210199237 U CN210199237 U CN 210199237U CN 201920934527 U CN201920934527 U CN 201920934527U CN 210199237 U CN210199237 U CN 210199237U
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Abstract
The utility model relates to a looped netowrk cabinet partial discharge detection device based on reform transform electrified display, including electrified display and with the detection impedance of the nuclear phase pore junction of electrified display, the detection impedance is earthed after being connected in parallel with the partial discharge measuring instrument, the other end of electrified display is connected with the high-voltage conductor through coupling capacitor and is responded to whether electrified high-voltage conductor; when the switch cabinet generates partial discharge, a certain amount of charges pass through the dielectric medium, a high-voltage conductor generates instantaneous voltage change, namely pulse voltage, at two ends of the detection impedance Zx through the coupling capacitor Cx, and the pulse voltage is processed by a partial discharge measuring instrument to obtain basic characteristic parameters and a map of the partial discharge, so that the detection of the partial discharge in the switch cabinet is realized, the external interference is avoided, the detection result is accurate, and the safety is good.
Description
Technical Field
The utility model relates to a partial discharge detection device field specifically is a looped netowrk cabinet partial discharge detection device based on reform transform electrified display.
Background
With the continuous deep development of urban network construction and transformation in China, load switch equipment is more and more applied to ring network power supply and terminal power transmission of a 10kV power distribution system. The ring main unit, which is a main device for supplying power to a ring network, is widely used. Therefore, the nature, the type, the application condition and the existing problems of the ring main unit are analyzed and mastered, and the method is greatly beneficial to ensuring the long-term safe operation of the equipment.
If the ring main unit manufactured or installed in the early stage has problems, the electric field distribution in partial areas of the insulation system is uneven, or the insulation in partial areas is aged due to the influence of factors such as vibration, temperature and humidity in the later operation process, and partial discharge is easily generated at the positions with weak insulation. Partial discharge has represented looped netowrk cabinet insulation system's running condition, through detecting partial discharge, can in time discover the insulating defect of looped netowrk cabinet, and the emergence of insulating because of continuously worsening and leading to the electric power accident is avoided in the timely processing of pertinence.
At present, partial discharge live detection means for a ring main unit mainly comprise a high-frequency current method, an ultrahigh frequency method, an ultrasonic method and a transient earth voltage method. The high-frequency current method needs to install a high-frequency sensor on a cable body or a grounding wire of a cable terminal connector, but in the actual operation process, the high-frequency sensor is limited by a ring main unit structure and an installation position, a detector hardly enters a cable channel, potential safety hazards exist, and certain difficulty is brought to high-frequency method partial discharge detection. The ultrahigh frequency method, the ultrasonic wave method and the transient earth voltage method are all detection outside the cabinet, are easily affected by external sound and electric interference, and the ring main unit is well sealed, so that internal discharge signals are difficult to propagate, and the detection leakage of partial discharge signals can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a looped netowrk cabinet partial discharge detection device based on reform transform electrified display is provided to solve the defect that exists among the prior art.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a ring main unit partial discharge detection device based on a modified electrified display comprises the electrified display and a detection impedance connected with a nuclear phase hole of the electrified display, wherein the detection impedance is connected with a partial discharge measuring instrument in parallel and then grounded, and the other end of the electrified display is connected with a high-voltage conductor through a coupling capacitor to sense whether the high-voltage conductor is electrified or not; the partial discharge measuring instrument comprises a host, an N-type connector I, an N-type connector II, a battery charging interface, a working state display lamp and a touch display screen, wherein the host is of a cuboid structure, and the N-type connector I, the N-type connector II and the working state display lamp are respectively fixed at the top of the host; the battery charging interface is embedded in the top of the host; the touch display screen is arranged on the outer surface of the front end of the main machine.
Furthermore, a supporting insulator with a certain capacitance is arranged below the coupling capacitor, and the supporting insulator is grounded.
Furthermore, the host mainly comprises a circuit board and a lithium battery, the circuit board and the lithium battery are fixed in the host through screws, and the N-type connector I, the N-type connector II, the battery charging interface, the working state indicator lamp and the circuit board are connected through cables; the circuit board is connected with the lithium battery through a cable.
Further, the touch display screen of the device is arranged on the outer surface of the host machine and is connected with the circuit board through a cable.
The utility model has the advantages that: when the switch cabinet generates partial discharge, a certain amount of charges pass through the dielectric medium, a high-voltage conductor generates instantaneous voltage change, namely pulse voltage, at two ends of the detection impedance Zx through the coupling capacitor Cx, and the pulse voltage is processed by a partial discharge measuring instrument to obtain basic characteristic parameters and a map of the partial discharge, so that the detection of the partial discharge in the switch cabinet is realized, the external interference is avoided, the detection result is accurate, and the safety is good.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a partial discharge measurement instrument;
FIG. 3 is a schematic diagram of a front cross-sectional structure of a partial discharge measurement instrument;
FIG. 4 is a schematic diagram of a side view cross-sectional structure of a partial discharge measurement instrument;
the graph labels are illustrated below:
1. the device comprises a partial discharge measuring instrument 11, a host computer 12, N-type connectors I and 13, N-type connectors II and 14, a battery charging interface 15, a working state display lamp 16, a touch display screen 17, a circuit board 18 and a lithium battery; 2. a live display, 3, a high-voltage conductor, 4, a supporting insulator, Zx, detection impedance, Cx and a coupling capacitor;
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
A ring main unit partial discharge detection device based on a modified electrified display comprises the electrified display and a detection impedance connected with a nuclear phase hole of the electrified display, wherein the detection impedance Zx is connected with a partial discharge measurement instrument in parallel and then grounded, and the other end of the electrified display is connected with a high-voltage conductor through a coupling capacitor to sense whether the high-voltage conductor is electrified or not; the partial discharge measuring instrument comprises a host, an N-type connector I, an N-type connector II, a battery charging interface, a working state display lamp and a touch display screen, wherein the host is of a cuboid structure, and the N-type connector I, the N-type connector II and the working state display lamp are respectively fixed at the top of the host; the battery charging interface is embedded in the top of the host; the touch display screen is arranged on the outer surface of the front end of the host;
fig. 1 is a schematic structural diagram of a ring main unit partial discharge monitoring method based on a modified live display. The device is externally connected with a resistance circuit at the nuclear phase hole of the electrified display of the switch cabinet, and the instantaneous voltage induced on the resistance is connected into the detection circuit for processing, and the result is displayed on the display touch screen of the detection device. The electrification indicator is connected with the high-voltage conductor through the coupling capacitor to sense whether the high-voltage conductor is electrified or not. The coupling capacitor is typically a support insulator having a capacitance, one of which is connected to the high voltage conductor and one of which is connected to the live display.
In one embodiment, a supporting insulator 4 with a certain capacitance is arranged below the coupling capacitor Cx, and the supporting insulator 4 is grounded;
in practice, the voltage at the nuclear pore of the charged display does not exceed 100V. When the switch cabinet generates partial discharge, a certain amount of charges pass through the dielectric medium, the discharge time is short, a steep pulse current is represented, the pulse current generates a transient voltage change at two ends of the detection impedance Zx through the coupling capacitor Cx by the high-voltage conductor, namely, a pulse voltage delta U, and the pulse voltage delta U is processed by the partial discharge measurement instrument M to obtain a basic characteristic parameter and a map of the partial discharge, so that the detection of the partial discharge in the switch cabinet is realized.
FIG. 2 is a schematic structural diagram of the detecting device of the present invention. As shown in the figure, the partial discharge measuring instrument comprises a host 11, a first N-type connector 12, a second N-type connector 13, a battery charging interface 14, a working state display lamp 15 and a touch display screen 16, wherein the host 11 is of a cuboid structure, and the first N-type connector 12 and the second N-type connector 13 are respectively fixed at the top of the host 11 and used for receiving a partial discharge power generation signal; the battery charging interface 14 is embedded in the top of the host 11 and is used for connecting a charging power supply; the working state display lamp 15 is fixed on the top of the host 11 and is used for displaying the working state of the host; the touch display screen 16 is installed on the outer surface of the front end of the main unit 11, and is used for displaying the partial discharge result and performing touch control on the device.
FIG. 3 is a schematic cross-sectional view of the detecting device of the present invention. In the figure, the main unit 11 mainly comprises a circuit board 17 and a lithium battery 18, the circuit board 17 and the lithium battery 18 are fixed inside the main unit 11 through screws, and the first N-type connector 12, the second N-type connector 13, the battery charging interface 14, the working state indicator light 15 and the circuit board 17 are connected through cables. The circuit board 17 and the lithium battery 18 are connected by a cable.
FIG. 4 is a schematic side sectional view of the detecting device. More specifically, the touch display screen 16 of the partial discharge measurement instrument 1 is mounted on the outer surface of the main unit 11, and is connected to the circuit board 17 through a cable.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. The utility model provides a looped netowrk cabinet partial discharge detection device based on reform transform electrified display which characterized in that: the device comprises a charged display and a detection impedance connected with a nuclear phase hole of the charged display, wherein the detection impedance is connected with a partial discharge measuring instrument in parallel and then grounded, and the other end of the charged display is connected with a high-voltage conductor through a coupling capacitor to sense whether the high-voltage conductor is charged or not; the partial discharge measuring instrument comprises a host, an N-type connector I, an N-type connector II, a battery charging interface, a working state display lamp and a touch display screen, wherein the host is of a cuboid structure, and the N-type connector I, the N-type connector II and the working state display lamp are respectively fixed at the top of the host; the battery charging interface is embedded in the top of the host; the touch display screen is arranged on the outer surface of the front end of the main machine.
2. The ring main unit partial discharge detection device based on the improved charged display as claimed in claim 1, wherein: and a supporting insulator with certain capacitance is arranged below the coupling capacitor, and the supporting insulator is grounded.
3. The ring main unit partial discharge detection device based on the improved live display of claim 1 or 2, wherein: the host machine mainly comprises a circuit board and a lithium battery, the circuit board and the lithium battery are fixed in the host machine through screws, and the N-type connector I, the N-type connector II, the battery charging interface, the working state indicator lamp and the circuit board are connected through cables; the circuit board is connected with the lithium battery through a cable.
4. The ring main unit partial discharge detection device based on the improved charged display as claimed in claim 3, wherein: the touch display screen of the device is arranged on the outer surface of the host machine and is connected with the circuit board through a cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920934527.XU CN210199237U (en) | 2019-06-20 | 2019-06-20 | Ring main unit partial discharge detection device based on transformation of electrified display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920934527.XU CN210199237U (en) | 2019-06-20 | 2019-06-20 | Ring main unit partial discharge detection device based on transformation of electrified display |
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| CN210199237U true CN210199237U (en) | 2020-03-27 |
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| CN201920934527.XU Active CN210199237U (en) | 2019-06-20 | 2019-06-20 | Ring main unit partial discharge detection device based on transformation of electrified display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740685A (en) * | 2021-09-23 | 2021-12-03 | 南京尚华电力科技有限公司 | Ring main unit partial discharge detection method based on coupling capacitance technology |
| CN114200257A (en) * | 2021-11-19 | 2022-03-18 | 山东电工配网科技发展有限公司 | Online monitor is put in ring net case office |
-
2019
- 2019-06-20 CN CN201920934527.XU patent/CN210199237U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740685A (en) * | 2021-09-23 | 2021-12-03 | 南京尚华电力科技有限公司 | Ring main unit partial discharge detection method based on coupling capacitance technology |
| CN114200257A (en) * | 2021-11-19 | 2022-03-18 | 山东电工配网科技发展有限公司 | Online monitor is put in ring net case office |
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