CN109950805B - High-voltage switch cabinet - Google Patents

High-voltage switch cabinet Download PDF

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Publication number
CN109950805B
CN109950805B CN201711385278.5A CN201711385278A CN109950805B CN 109950805 B CN109950805 B CN 109950805B CN 201711385278 A CN201711385278 A CN 201711385278A CN 109950805 B CN109950805 B CN 109950805B
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China
Prior art keywords
partial discharge
sensor
discharge sensor
cabinet
signal
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CN201711385278.5A
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Chinese (zh)
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CN109950805A (en
Inventor
王子驰
柳俊岗
陈利民
柴娜
李红雷
周银锋
孙红娟
马雪飞
卢玉飞
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State Grid Corp of China SGCC
Pinggao Group Co Ltd
Tianjin Pinggao Intelligent Electric Co Ltd
Original Assignee
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Tianjin Pinggao Intelligent Electric Co Ltd
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Application filed by State Grid Corp of China SGCC, Pinggao Group Co Ltd, Tianjin Pinggao Intelligent Electric Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201711385278.5A priority Critical patent/CN109950805B/en
Publication of CN109950805A publication Critical patent/CN109950805A/en
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Abstract

The invention relates to a high-voltage switch cabinet. The utility model provides a high tension switchgear includes the cabinet body and sets up at the internal electrified display sensor of cabinet, and the internal support that is used for installing electrified display sensor that is equipped with of cabinet, high tension switchgear still including the partial discharge sensor who has rogowski coil, is equipped with the installation cavity between support and the cabinet body, and the partial discharge sensor is installed in the installation cavity, the signal line that is equipped with the coupling capacitance who supplies electrified display sensor on the partial discharge sensor passes the circuit is perforated, and the partial discharge sensor has and is used for the signal line that the partial discharge signal that will detect draws forth. The high-voltage switch cabinet comprises a cabinet body and a partial discharge sensor, wherein the partial discharge sensor is provided with a Rogowski coil, the partial discharge sensor is used for sensing and collecting partial discharge information in the cabinet body and transmitting the partial discharge information out in time through a signal wire, and the live measurement of the partial discharge of the high-voltage switch cabinet is realized.

Description

High-voltage switch cabinet
Technical Field
The invention relates to a high-voltage switch cabinet.
Background
With the increasing demand of society on electric power, the requirement of people on the quality of electric energy is higher and higher, and the requirement on the safe operation of equipment is correspondingly improved. The high-voltage switch cabinet is electrical equipment which is used in a large amount in a power distribution network, the high-voltage switch cabinet needs to be periodically detected in actual operation, and the workload of operation and maintenance is large.
Chinese patent with publication number CN205004669U and publication date 2016.01.27 discloses an intelligent metal-enclosed switchgear, which comprises a cabinet body and a circuit breaker handcart, wherein the cabinet body comprises a bus chamber, a cable chamber and a secondary element chamber, an electric grounding switch, a high-voltage electrified sensor, an ambient temperature sensor and a heater are installed in the cable chamber, the high-voltage electrified sensor is an electrified display sensor, a support for installing the electrified display sensor is arranged in the cabinet body, an electric operation module and a temperature measurement module are installed in the secondary element chamber, each operation module is connected with an intelligent control terminal, and the intelligent control terminal displays the working state and a primary simulation state of the switchgear on a display panel of the intelligent control terminal in real time. However, the high-voltage switch cabinet may generate partial discharge in operation, even because the partial discharge fails.
Chinese patent No. CN204287389U, publication No. 2015.04.22, discloses a high-frequency current partial discharge signal acquisition sensor, which has a rogowski coil wound around a magnetic core and grounded through an integral resistor. When the high-frequency current partial discharge signal acquisition sensor detects a partial discharge signal, a current-carrying lead passes through the Rogowski coil, the Rogowski coil induces current pulses, and then pulse signals are acquired through the integrating resistor, so that the existence of partial discharge in the cable and the magnitude of the partial discharge are judged.
In the prior art, a power supply needs to be cut off before the high-voltage switch cabinet carries out partial discharge detection, and then the partial discharge sensor is connected with a signal terminal, so that the electrified maintenance of the high-voltage switch cabinet cannot be realized.
Disclosure of Invention
The invention aims to provide a high-voltage switch cabinet, which solves the problem that the live overhaul of the high-voltage switch cabinet cannot be realized when the local discharge detection is carried out on the high-voltage switch cabinet in the prior art.
In order to realize the purpose, the technical scheme of the high-voltage switch cabinet is as follows:
the technical scheme 1: the utility model provides a high tension switchgear, includes the cabinet body and sets up at the internal electrified display sensor of cabinet, the internal support that is used for installing electrified display sensor that is equipped with of cabinet, high tension switchgear is still including the partial discharge sensor who has rogowski coil, be equipped with the installation cavity between the support and the cabinet body, the partial discharge sensor is installed in the installation cavity, the signal line that is equipped with the coupling capacitance who supplies electrified display sensor on the partial discharge sensor passes the circuit is perforated, the partial discharge sensor has and is used for the signal line that the partial discharge signal that will detect draws forth.
The beneficial effects are as follows: this high tension switchgear includes that the cabinet body is equipped with the installation cavity including the partial discharge sensor that has rogowski coil for between the support and the cabinet body of installation electrified display sensor, the partial discharge sensor is installed in the installation cavity, the signal line that is equipped with the coupling capacitance who supplies electrified display sensor on the partial discharge sensor passes the circuit is perforated, and the internal partial discharge information of cabinet is collected in the induction of partial discharge sensor and in time transmits away through the signal line, realizes the live-line measurement to high tension switchgear partial discharge.
The technical scheme 2 is as follows: on the basis of the technical scheme 1, the signal output end of the signal wire of the partial discharge sensor is connected with an output terminal, and the output terminal is arranged on an outer panel of the high-voltage switch cabinet.
Technical scheme 3: on the basis of the technical scheme 2, the output terminal is an N-type cable connector. The beneficial effects are as follows: the output terminal is an N-type cable connector, and the signal terminal is connected with the partial discharge sensor in an inserting mode, so that the connection is more convenient.
The technical scheme 4 is as follows: on the basis of the technical scheme 1 or 2 or 3, the support is in a shape like a Chinese character 'ji', connecting flanges are arranged on two sides of the support, and the support and the cabinet body are fixedly connected through the connecting flanges to form the installation cavity in a surrounding mode.
The beneficial effects are as follows: the support is "nearly" font, and the both sides of support are flange, and the support encloses through flange fixed connection with the cabinet body the installation cavity, make full use of support below space makes partial discharge sensor do not produce any influence to original electrical properties of cubical switchboard and mechanical properties.
The technical scheme 5 is as follows: on the basis of the technical scheme 1 or 2 or 3, the partial discharge sensor is provided with a metal shielding shell, and the line through hole is formed in the metal shielding shell.
The technical scheme 6 is as follows: on the basis of technical scheme 5, the support is made of metal, the partial discharge sensor is fixedly connected to a metal part in the cabinet body, and the metal shielding shell is connected with the metal part and grounded.
The technical scheme 7 is as follows: on the basis of the technical scheme 2 or 3, the output terminal is connected with a signal terminal for collecting and analyzing information transmitted by the partial discharge sensor in a signal mode.
The technical scheme 8 is as follows: on the basis of technical scheme 7, the signal terminal is a portable partial discharge live detector, and the portable partial discharge detector comprises a data acquisition and processing module, a data analysis module, a data storage module, a data display module and a direct-current power supply.
The beneficial effects are as follows: the portable partial discharge detector can intuitively reflect the condition of partial discharge in the high-voltage switch cabinet body by acquiring and analyzing information data transmitted by the partial discharge sensor.
Technical scheme 9: on the basis of the technical scheme 1 or 2 or 3, the electrified display sensor is fixedly connected to the bracket through screws.
Drawings
FIG. 1 is a schematic structural diagram of a high voltage switchgear of the present invention;
FIG. 2 is a schematic structural diagram of a partial discharge sensor mounting manner of the high-voltage switch cabinet according to the present invention;
FIG. 3 is a schematic diagram of a partial discharge sensor according to the present invention;
FIG. 4 is a top view of the partial discharge sensor shown in FIG. 3;
FIG. 5 is a side view of the partial discharge sensor shown in FIG. 3;
FIG. 6 is a front view of the cradle within the cabinet body of the high voltage switchgear of the present invention;
FIG. 7 is a top view of the rack within the cabinet body of the high voltage switchgear of the present invention;
FIG. 8 is a circuit diagram of the local discharge live detection of the high voltage switch cabinet of the present invention;
fig. 9 is a schematic structural diagram of a partial discharge sensor mounting manner in embodiment 2 of the high-voltage switch cabinet of the present invention.
Description of reference numerals: 1. a cabinet body; 2. a charged display sensor; 3. a signal line; 4. a support; 41. a threaded hole; 5. a partial discharge sensor; 51. perforating a line; 6. a portable partial discharge live detector; 7. a charged display.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 7, an embodiment 1 of the high-voltage switch cabinet of the present invention includes a cabinet body 1, a charged display sensor 2 disposed in the cabinet body, a bracket 4 for mounting the charged display sensor 2 is disposed in the cabinet body 1, the high-voltage switch cabinet further includes a partial discharge sensor 5 having a rogowski coil, a mounting cavity is disposed between the bracket 4 and the cabinet body 1, the partial discharge sensor 5 is mounted in the mounting cavity, a signal line on the partial discharge sensor 5, which is used for coupling capacitance of the charged display sensor 2, passes through the line perforation 51, and the partial discharge sensor 5 has a signal line 3 for leading out a detected partial discharge signal.
The partial discharge sensor 5 is fixed on the cabinet body 1, the support 4 is in a shape like a Chinese character 'ji', the two sides of the support 4 are provided with connecting flanges, and the support 4 and the cabinet body 1 are fixedly connected through the connecting flanges to form the installation cavity in a surrounding mode. The two sides of the bracket 4 are provided with connecting flanges, and the bracket 4 is fixedly connected with the cabinet body 1 through the connecting flanges. The electrified display sensor 2 is fixed on the support 4, the mounting hole for mounting the electrified display sensor 2 is formed in the upper end face of the support 4 and is a threaded hole 41, and the electrified display sensor 2 is fixed on the support 4 through screws penetrating through the threaded hole 41.
The partial discharge sensor is a current transformer which comprises a metal shielding shell and a Rogowski coil arranged in the metal shielding shell and does not contain an iron core. The design size of the metal shielding shell is controlled within 70mm 50mm 20mm, the installation is convenient, the line perforation 51 penetrates through the metal shielding shell of the current transformer, and a signal line of the coupling capacitor of the electrified display sensor 2 penetrates through the bracket 4 and the pipeline perforation and is connected with an electrified display 7 through signals.
The signal output end of the signal wire 3 of the partial discharge sensor 5 is connected with an output terminal, the output terminal is arranged on an outer panel of the high-voltage switch cabinet, and the length of a cable between the partial discharge sensor 5 and the output terminal on the outer panel is as short as possible, so that interference is reduced, and signal transmission attenuation is avoided. The output terminal is a standard N-type cable connector, the N-type cable connector is in signal connection with a signal terminal used for collecting and analyzing information transmitted by the partial discharge sensor 5, the signal terminal is a portable partial discharge live detector 6, and the portable partial discharge live detector 6 comprises a data acquisition and processing module, a data analysis module, a data storage module, a data display module and a direct-current power supply.
An output terminal of a signal output end of a partial discharge sensor 5 of a high-voltage switch cabinet is positioned on a panel of the high-voltage switch cabinet, when the partial discharge detection is carried out, a portable partial discharge electrified detector 6 is directly plugged on the output terminal of the partial discharge sensor 5, as shown in fig. 8, an electrified display sensor 2 in a cabinet body 1 is coupled with a high-frequency pulse signal of partial discharge through a high-voltage bus coupling capacitor, the partial discharge sensor 5 receives the high-frequency pulse signal through magnetic field induction, the partial discharge sensor 5 transmits the received information to the output terminal through a signal wire 3, the portable partial discharge electrified detector 6 collects the information transmitted by the partial discharge sensor 5, and accurately analyzes the collected information, so that the accurate measurement of the partial discharge in the high-voltage switch cabinet is realized.
As shown in fig. 9, the embodiment 2 of the high-voltage switch cabinet of the invention is different from the embodiment 1 in that if the size of the partial discharge sensor 5 is relatively large, the cabinet body 1 may be provided with a corresponding groove, so that the arrangement of other components in the cabinet body 1 is not affected.
In other embodiments, the partial discharge sensor can be fastened to a metal frame inside the high-voltage switch cabinet, for example on the inner wall of the high-voltage switch cabinet or on a partition wall.

Claims (7)

1. The utility model provides a high tension switchgear, includes the cabinet body and sets up at the internal electrified display sensor of cabinet, the internal support that is used for installing electrified display sensor that is equipped with of cabinet, its characterized in that: the high-voltage switch cabinet also comprises a partial discharge sensor with a Rogowski coil, the partial discharge sensor is fixed on the cabinet body, an installation cavity is arranged between the bracket and the cabinet body, the bracket is shaped like a Chinese character 'ji', connecting flanges are arranged at two sides of the bracket, the bracket and the cabinet body are fixedly connected through the connecting flanges to enclose the installation cavity, the partial discharge sensor is arranged in the mounting cavity, the partial discharge sensor is provided with a line perforation for a signal wire of a coupling capacitor of the charged display sensor to pass through, the signal wire of the coupling capacitor of the charged display sensor passes through the bracket and is connected with a charged display through a signal of the line perforation, the partial discharge sensor has a signal line for drawing out a detected partial discharge signal, the signal output end of the signal wire of the partial discharge sensor is connected with an output terminal, and the output terminal is arranged on an outer panel of the high-voltage switch cabinet.
2. The high-voltage switchgear cabinet according to claim 1, characterized in that: the output terminal is an N-type cable connector.
3. The high-voltage switchgear cabinet according to claim 1 or 2, characterized in that: the partial discharge sensor has a metal shield case on which the line penetration hole is provided.
4. The high-voltage switchgear cabinet according to claim 3, characterized in that: the support is made of metal, the partial discharge sensor is fixedly connected to a metal part in the cabinet body, and the metal shielding shell is connected with the metal part and grounded.
5. The high-voltage switchgear cabinet according to claim 1 or 2, characterized in that: the output terminal is in signal connection with a signal terminal used for collecting and analyzing information transmitted by the partial discharge sensor.
6. The high voltage switchgear of claim 5, wherein: the signal terminal is a portable partial discharge live detector which comprises a data acquisition and processing module, a data analysis module, a data storage module, a data display module and a direct-current power supply.
7. The high-voltage switchgear cabinet according to claim 1 or 2, characterized in that: the electrified display sensor is fixedly connected to the support through a screw.
CN201711385278.5A 2017-12-20 2017-12-20 High-voltage switch cabinet Active CN109950805B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711385278.5A CN109950805B (en) 2017-12-20 2017-12-20 High-voltage switch cabinet

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Application Number Priority Date Filing Date Title
CN201711385278.5A CN109950805B (en) 2017-12-20 2017-12-20 High-voltage switch cabinet

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CN109950805A CN109950805A (en) 2019-06-28
CN109950805B true CN109950805B (en) 2020-12-18

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112666427A (en) * 2020-11-27 2021-04-16 广西电网有限责任公司电力科学研究院 Signal extraction device for partial discharge in switch cabinet and detection method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103913679A (en) * 2014-03-03 2014-07-09 国联思创(北京)科技有限公司 Online monitoring system for partial discharge of high-voltage switch cabinet
CN204142278U (en) * 2014-06-25 2015-02-04 樊国利 High-tension switch cabinet monitoring device
CN205608140U (en) * 2016-04-22 2016-09-28 贾琼雷 Inside high -pressure conductor of GIS circular arc sensor for partial discharge detector
CN205749787U (en) * 2016-06-21 2016-11-30 上海驹电电气科技有限公司 A kind of local discharge sensor for switch cabinet equipment
CN206595549U (en) * 2017-03-31 2017-10-27 泉州亿兴电力有限公司 A kind of KYN transition cabinet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103913679A (en) * 2014-03-03 2014-07-09 国联思创(北京)科技有限公司 Online monitoring system for partial discharge of high-voltage switch cabinet
CN204142278U (en) * 2014-06-25 2015-02-04 樊国利 High-tension switch cabinet monitoring device
CN205608140U (en) * 2016-04-22 2016-09-28 贾琼雷 Inside high -pressure conductor of GIS circular arc sensor for partial discharge detector
CN205749787U (en) * 2016-06-21 2016-11-30 上海驹电电气科技有限公司 A kind of local discharge sensor for switch cabinet equipment
CN206595549U (en) * 2017-03-31 2017-10-27 泉州亿兴电力有限公司 A kind of KYN transition cabinet

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