CN201955434U - Local discharge detection TEV (transient earth voltage) sensor of high-voltage switch cabinet - Google Patents
Local discharge detection TEV (transient earth voltage) sensor of high-voltage switch cabinet Download PDFInfo
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- CN201955434U CN201955434U CN2011200282480U CN201120028248U CN201955434U CN 201955434 U CN201955434 U CN 201955434U CN 2011200282480 U CN2011200282480 U CN 2011200282480U CN 201120028248 U CN201120028248 U CN 201120028248U CN 201955434 U CN201955434 U CN 201955434U
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- switch cabinet
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- processing circuit
- operational amplifier
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Abstract
The utility model relates to a local discharge detection TEV (transient earth voltage) sensor of a high-voltage switch cabinet, which belongs to the technical field of detection and is used for collecting transient earth voltage signals produced on a high-voltage switch cabinet body during local discharging. In the technical scheme, the sensor comprises a shell, a bottom cover, a shielding case, a flat-plate capacitive coupling and a signal processing circuit. The circuit board of the signal processing circuit is arranged in the shielding case, the shielding case is arranged in the shell, the flat-plate capacitive coupling is arranged on the lower surface of the shell and is covered by the bottom cover, the signal transmission wire of the flat-plate capacitive coupling is connected with the input end of the signal processing circuit, and magnets are embedded at the bottom and/or top of the shell. The utility model has the advantages that the local discharge detection TEV sensor is convenient and rapid to install and has high interference resistance, the workload for patrolling inspection of the high-voltage switch cabinet can be reduced greatly, the detection efficiency is increased, and the reliability of detection results is improved.
Description
Technical field
The utility model relates to a kind of high-tension switch cabinet partial discharge detecting sensor based, and particularly a kind of device that can detect the instantaneous voltage-to-ground (TEV) that shelf depreciation produces on the high-tension switch cabinet cabinet belongs to the detection technique field.
Background technology
High-tension switch cabinet is a visual plant commonly used in the electric system, and shelf depreciation is the main cause of proximity switch cabinet insulation fault, and therefore, it is significant to the safe and stable operation of guaranteeing high-tension switch cabinet effectively to detect shelf depreciation.
At present, the most frequently used detection method for local discharge is a ultrasonic method of measuring, when adopting this method to detect ultrasonic signal, ultrasonic probe must keep well contacting with the switch cabinet, and need between ultrasonic probe and cabinet, smear couplant, fitting operation is very loaded down with trivial details, wastes time and energy and testing result very easily is subjected to the influence of external environment.If can design a kind of simple to operate, easy for installation, quick and the strong local discharge sensor of antijamming capability, will significantly reduce the workload that high-tension switch cabinet is patrolled and examined, improve the reliability of testing efficient and testing result.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is a kind of simple to operate, easy for installation to provide, the quick and strong high-tension switch cabinet office of antijamming capability puts and detects the TEV sensor.
Problem described in the utility model realizes with following technical proposals:
A kind of high-tension switch cabinet office puts and detects the TEV sensor, form by shell, bottom, radome, flat capacitor coupling mechanism and signal processing circuit, the circuit board of described signal processing circuit is installed in the radome, described radome is installed in the enclosure, described flat capacitor coupling mechanism is installed in the lower surface of shell and is covered by bottom, its signal transmssion line connects the input end of signal processing circuit, and the bottom and/or the top of described shell are embedded with magnet.
Above-mentioned high-tension switch cabinet office puts and detects the TEV sensor, described signal processing circuit is by the wave filter that connects successively, first super high frequency amplifier, second super high frequency amplifier, detection chip and peak holding circuit are formed, the output signal of the input termination flat capacitor coupling mechanism of described wave filter, described peak holding circuit is by two operational amplifiers, two diodes, a resistance and an electric capacity are formed, the in-phase input end of first operational amplifier connects the output terminal of detection chip, inverting input connects the in-phase input end of second operational amplifier, and output terminal connects the in-phase input end of second operational amplifier successively through first diode and second diode; Described second operational amplifier is connected into voltage follower, and its output terminal is connected with PD meter by the output interface that is installed on the shell; The serial connection point of two diodes of described resistance one termination, the output terminal of a termination second operational amplifier; The in-phase input end of described electric capacity one end ground connection one termination second operational amplifier.
Above-mentioned high-tension switch cabinet office puts and detects the TEV sensor, and described radome is provided with four chambeies, and the circuit board of wave filter, two-stage radio-frequency amplifier, detection chip and peak holding circuit is installed respectively in four chambeies.
The utility model utilizes the flat capacitor coupling mechanism to receive the instantaneous voltage-to-ground signal that shelf depreciation produces on the high-tension switch cabinet cabinet, and this signal is delivered to PD meter by the signal processing circuit collection and after handling.Because signal processing circuit is installed in the radome, effectively suppressed the interference of the interference of external signal and this circuit to the outside.Simultaneously, owing to be embedded with magnet on the shell, this sensor can rely on magnetic force to be adsorbed on the shell of high-tension switch cabinet, installs very convenient.Radome adopts the multi-cavity body structure, has reduced disturbing mutually between circuit.
The utility model is easy for installation, quick and antijamming capability is strong, can significantly reduce the workload that high-tension switch cabinet is patrolled and examined, and improves the reliability of testing efficient and testing result.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an electrical schematic diagram.
Each label is among the figure: 1, housing main body; 2, top magnet; 3, housing top cover; 4, radome; 5, circuit board; 6, bottom magnet; 7, bottom; 8, signal transmssion line; P, output interface; ANT, flat capacitor coupling mechanism; LB, wave filter; FD1, FD2, super high frequency amplifier; U1, detection chip; F1, F2, operational amplifier; D1, D2, diode; C, electric capacity; R, resistance; P, output interface.
Embodiment
Referring to Fig. 1, the utility model is by shell, radome 4, magnet (comprising top magnet 2 and bottom magnet 6), flat capacitor coupling mechanism ANT(antenna) and signal processing circuit form, wherein, shell is made up of housing main body 1 and housing top cover 3.Circuit board 5 is positioned at radome 4 inside, and radome 4 adopts the multi-cavity body structure.Flat capacitor coupling mechanism ANT receiving area is big, for the over the ground instantaneous voltage responsiveness height of switch cubicle inside shelf depreciation in the cabinet generation.Cover top portion and bottom all are embedded with magnet, can be adsorbed on the switch cubicle housing, and be easy to use.Radome 4 and flat capacity coupler ANT are positioned at the space that is surrounded by housing main body 1, housing top cover 3 and bottom 7, have reduced when hand-held the use human body to the influence of internal circuit.The radome 4 inner multi-cavity body structures that adopt have reduced disturbing mutually between circuit.Flat capacitor coupling mechanism ANT and tested product metal surface are that medium forms capacitive couplings with bottom 7.
Referring to Fig. 2, by flat capacitor coupling mechanism ANT(antenna) signal that receives is input on the circuit board, this signal transfers to super high frequency amplifier FD1 after wave filter LB filtering, FD2, signal after amplifying through two-stage transfers to detection chip U1(U1 and adopts LG5534) carry out detection, the ultra-high frequency signal that collects is reduced to low frequency signal, again via F1, F2, D1, D2, R, the peak holding circuit that C forms further elongates the die-away time of pulse signal, make signal frequency be reduced to the frequency that PD meter can detect, be connected on the input channel of PD meter via output interface P again.
Claims (3)
1. a high-tension switch cabinet office puts and detects the TEV sensor, it is characterized in that, it is made up of shell, bottom (7), radome (4), flat capacitor coupling mechanism (ANT) and signal processing circuit, the circuit board of described signal processing circuit is installed in the radome (4), described radome (4) is installed in the enclosure, described flat capacitor coupling mechanism (ANT) is installed in the lower surface of shell and is covered by bottom (7), its signal transmssion line (8) connects the input end of signal processing circuit, and the bottom and/or the top of described shell are embedded with magnet.
2. put according to the described high-tension switch cabinet of claim 1 office and detect the TEV sensor, it is characterized in that, described signal processing circuit is by the wave filter (LB) that connects successively, first super high frequency amplifier (FD1), second super high frequency amplifier (FD2), detection chip (U1) and peak holding circuit are formed, the output signal of the input termination flat capacitor coupling mechanism (ANT) of described wave filter (LB), described peak holding circuit is by two operational amplifiers, two diodes, resistance (R) and an electric capacity (C) are formed, the in-phase input end of first operational amplifier (F1) connects the output terminal of detection chip (U1), inverting input connects the in-phase input end of second operational amplifier (F2), and output terminal connects the in-phase input end of second operational amplifier (F2) successively through first diode (D1) and second diode (D2); Described second operational amplifier (F2) is connected into voltage follower, and its output terminal is connected with PD meter by the output interface (P) that is installed on the shell; The serial connection point of two diodes of described resistance (R) termination, the output terminal of a termination second operational amplifier (F2); The in-phase input end of described electric capacity (C) end ground connection one termination, second operational amplifier (F2).
3. put according to the described high-tension switch cabinet of claim 2 office and detect the TEV sensor, it is characterized in that, described radome (4) is provided with four chambeies, and the circuit board of wave filter (LB), two-stage radio-frequency amplifier, detection chip (U1) and peak holding circuit is installed respectively in four chambeies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200282480U CN201955434U (en) | 2011-01-27 | 2011-01-27 | Local discharge detection TEV (transient earth voltage) sensor of high-voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200282480U CN201955434U (en) | 2011-01-27 | 2011-01-27 | Local discharge detection TEV (transient earth voltage) sensor of high-voltage switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955434U true CN201955434U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200282480U Expired - Fee Related CN201955434U (en) | 2011-01-27 | 2011-01-27 | Local discharge detection TEV (transient earth voltage) sensor of high-voltage switch cabinet |
Country Status (1)
| Country | Link |
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| CN (1) | CN201955434U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508128A (en) * | 2011-10-24 | 2012-06-20 | 天津大学 | Switch cabinet local discharge transient-to-ground voltage detection system based on wireless network |
| CN102749557A (en) * | 2012-06-07 | 2012-10-24 | 国网电力科学研究院武汉南瑞有限责任公司 | Partial discharging detecting device of switch cabinet |
| CN102928745A (en) * | 2012-10-08 | 2013-02-13 | 华北电力大学 | Wide-band gain-adjustable medium inductive sensor for detecting partial discharge of switch cabinet |
| CN103207306A (en) * | 2013-03-11 | 2013-07-17 | 广东电网公司电力科学研究院 | Partial discharge transient earth voltage sensor |
| CN103217633A (en) * | 2013-03-28 | 2013-07-24 | 国家电网公司 | Sensor for detecting local discharge of high-voltage switch cabinet |
| CN104991176A (en) * | 2015-07-22 | 2015-10-21 | 广州供电局有限公司 | Signal conditioning circuit for ultrahigh frequency sensor |
| CN111624446A (en) * | 2020-05-12 | 2020-09-04 | 西安交通大学 | Passive earth electric wave sensor based on radio frequency energy collection |
| CN112710435A (en) * | 2020-12-18 | 2021-04-27 | 张家港宏昌钢板有限公司 | Regulator cubicle cooling water seepage detecting system |
| CN113884848A (en) * | 2021-09-23 | 2022-01-04 | 浙江华云电力工程设计咨询有限公司 | Anti-transient pulse interference switch cabinet partial discharge detection system |
-
2011
- 2011-01-27 CN CN2011200282480U patent/CN201955434U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508128A (en) * | 2011-10-24 | 2012-06-20 | 天津大学 | Switch cabinet local discharge transient-to-ground voltage detection system based on wireless network |
| CN102749557A (en) * | 2012-06-07 | 2012-10-24 | 国网电力科学研究院武汉南瑞有限责任公司 | Partial discharging detecting device of switch cabinet |
| CN102928745A (en) * | 2012-10-08 | 2013-02-13 | 华北电力大学 | Wide-band gain-adjustable medium inductive sensor for detecting partial discharge of switch cabinet |
| CN103207306A (en) * | 2013-03-11 | 2013-07-17 | 广东电网公司电力科学研究院 | Partial discharge transient earth voltage sensor |
| CN103217633A (en) * | 2013-03-28 | 2013-07-24 | 国家电网公司 | Sensor for detecting local discharge of high-voltage switch cabinet |
| CN104991176A (en) * | 2015-07-22 | 2015-10-21 | 广州供电局有限公司 | Signal conditioning circuit for ultrahigh frequency sensor |
| CN111624446A (en) * | 2020-05-12 | 2020-09-04 | 西安交通大学 | Passive earth electric wave sensor based on radio frequency energy collection |
| CN112710435A (en) * | 2020-12-18 | 2021-04-27 | 张家港宏昌钢板有限公司 | Regulator cubicle cooling water seepage detecting system |
| CN113884848A (en) * | 2021-09-23 | 2022-01-04 | 浙江华云电力工程设计咨询有限公司 | Anti-transient pulse interference switch cabinet partial discharge detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20170127 |