CN104515935A - Electrical box and discharging detection alarm method thereof - Google Patents
Electrical box and discharging detection alarm method thereof Download PDFInfo
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- CN104515935A CN104515935A CN201310464680.8A CN201310464680A CN104515935A CN 104515935 A CN104515935 A CN 104515935A CN 201310464680 A CN201310464680 A CN 201310464680A CN 104515935 A CN104515935 A CN 104515935A
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Abstract
The invention provides an electrical box and a discharging detection alarm method thereof. The electrical box comprises a box body, an electrical apparatus element arranged in the box body and a discharging detector. The discharging detector comprises a sensor and a control portion, the sensor is arranged in the box body and used for detecting ultrasonic wave excited in electrical element discharging, and the control portion is electrically connected with the sensor and used for sending alarm signals according to detection signal of the sensor. The sensor is arranged in the box body and used for directly detecting the ultrasonic wave in the box body, and the ultrasonic wave not needs to penetrate the box body and experiences no attenuation, thus discharging phenomenal detection sensitivity is guaranteed, and the sensor is isolated with external interference by the box body, providing anti-interference capability for the detection, thus accuracy of the detected detection signals is ensured. In this way, the electrical box can accurately and reliably send the alarm signals, allowing the operators to find hidden dangers in advance, and accordingly safety running of the equipment is guaranteed.
Description
Technical field
The present invention relates to electric equipment field, more specifically, relate to a kind of electric appliance box and its discharge examination alarm method.
Background technology
Electric appliance box is widely used in distribution network, and wherein switch cubicle is again most widely used equipment in various electric appliance box, and switch cubicle plays important effect in distribution network, and whether the whether stable direct relation of switch cubicle distribution network stable.Because the installation environment of switch cubicle is different, and need to run throughout the year, dust stratification, dirty, the phenomenon such as burr, dust or loosened screw may be there is in a lot of positions of switch cubicle, these fault long term accumulation the insulativity of inside switch cabinet can be caused to reduce or switch cubicle each parts Contact bad, and then cause the major accident such as single-phase earthing, switch trip, even blast.
Rule of thumb, electric appliance box, before generation catastrophic failure, can produce electric discharge phenomena within accident latent period, so by the relevant information of the hidden danger that can obtain the detection of electric discharge insulating, thus gives warning in advance, the generation of Accident prevention.The electric discharge phenomena of electric appliance box inside mainly comprise surface-discharge, internal discharge, corona discharge etc., the transfer of electric charge and the loss of electric energy is produced in discharge process, and along with sound, light, thermal phenomenon and generate the phenomenons such as other material things, these phenomenons all can as judging the foundation that electric appliance box discharges.
Detection method comparatively ripe in prior art detects for the discharge charge in electric appliance box, but this method belongs to contact detecting method.And non-contact detection method is the detection method of carrying out sensing detection based on transient state voltage-to-ground, but this method is vulnerable to interference, and sensitivity is lower.
Summary of the invention
The present invention aims to provide a kind of electric appliance box and its discharge examination alarm method, is vulnerable to interference, the problem that sensitivity is lower with the untouchable discharge detection method solving prior art.
For solving the problems of the technologies described above, according to an aspect of the present invention, provide a kind of electric appliance box, comprise casing and be arranged on the electric elements in casing, electric appliance box also comprises discharging detection device, discharging detection device comprises: sensor, is arranged in casing, the ultrasound wave excited during for detecting electric elements electric discharge; Control part, is connected with sensor electrical, sends alerting signal for the detection signal according to sensor.
Further, discharging detection device also comprises: the first photoelectric conversion device, to be arranged in casing and to be connected with sensor electrical, for converting detection signal to light signal; Second photoelectric conversion device, is connected with the first photoelectric conversion device, and for converting light signal to electric signal, the second photoelectric conversion device is also connected with control part.
Further, the second photoelectric conversion device is connected with control part wireless telecommunications.
Further, discharging detection device also comprises: wireless transmitting unit, is electrically connected with the second photoelectric conversion device, for being that wireless signal sends by transform electrical signals; Radio receiving unit, is electrically connected with control part, for receiving wireless signal.
Further, electric appliance box also comprises display part, is electrically connected with control part, for display alarm signal.
Further, sensor setting is in the inner side of the chamber door of casing.
Further, electric appliance box also comprises sensor support base, and sensor support base is arranged on the inwall of casing, and sensor setting is on sensor support base, and the internal wall separates of sensor and casing is opened by sensor support base.
Further, sensor is piezoceramic transducer.
According to another aspect of the present invention, additionally provide a kind of discharge examination alarm method of electric appliance box, comprising: sensor is set in the casing of electric appliance box, the ultrasound wave excited when discharging with the electric elements detecting electric appliance box; Detecting in hyperacoustic situation, reporting to the police and disconnect the power supply of electric appliance box.
Further, method also comprises: the outside being delivered to casing after the output signal of sensor is converted into light signal, and after light signal is further converted to electric signal, wirelessly send to control part, to be reported to the police by control part and to disconnect the power supply of electric appliance box.
Sensor setting of the present invention is in casing, ultrasound wave in direct-detection casing, because ultrasound wave does not need through casing, do not need through overdamping, so this set method ensure that the sensitivity of the detection to electric discharge phenomena, and casing can also leave isolated for the interference in sensor and external environment, providing antijamming capability, ensure that the accuracy of the detection signal detected for detecting.Therefore, electric appliance box of the present invention accurately and reliably can send alerting signal when generation electric discharge phenomena, staff can be scented a hidden danger in advance, and then take measures to avoid breaking down, guarantee equipment safety operation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 diagrammatically illustrates the schematic diagram of the electric appliance box in the present invention.
Reference numeral in figure: 10, sensor; 21, the first photoelectric conversion device; 22, the second photoelectric conversion device; 23, wireless transmitting unit; 24, radio receiving unit; 30, control part; 40, display part; 100, casing.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
According to an aspect of the present invention, provide a kind of electric appliance box, as shown in Figure 1, the electric elements that this electric appliance box comprises casing 100 and is arranged in casing 100, electric appliance box also comprises discharging detection device, discharging detection device comprises: sensor 10, is arranged in casing 100, the ultrasound wave excited during for detecting electric elements electric discharge; Control part 30, is electrically connected with sensor 10, for sending alerting signal according to the detection signal of sensor 10.
The ultrasound wave produced during electric elements generation shelf depreciation in electric appliance box is a kind of mechanical vibration wave, the intermolecular of region of discharge will produce violent shock, this shock will macroscopically show as a kind of pressure, due to rapid, so the electric discharge of electric elements will inspire corresponding ultrasound wave.Because ultrasound wave is decayed very fast, so it is difficult to the casing 100 penetrating electric appliance box in solids.
Sensor 10 of the present invention is arranged in casing 100, ultrasound wave in direct-detection casing 100, because ultrasound wave does not need through casing 100, do not need through overdamping, so this set method ensure that the sensitivity of the detection to electric discharge phenomena, and casing 100 can also leave isolated to sensor 10 and the interference in external environment, providing antijamming capability, ensure that the accuracy of the detection signal detected for detecting.Therefore, electric appliance box of the present invention accurately and reliably can send alerting signal when generation electric discharge phenomena, staff can be scented a hidden danger in advance, and then take measures to avoid breaking down, guarantee equipment safety operation.
Preferably, sensor 10 is piezoceramic transducers.Piezoelectric ceramics has direct piezo electric effect, under hyperacoustic action of mechanical pressure, piezoceramic transducer generation deformation is to produce alternating electric field, thus acoustical signal is converted to electric signal, and piezoceramic transducer also has self insulation, sensitivity advantages of higher, be suitable for being arranged on the interior ultrasound wave detecting electric discharge phenomena and produce of casing 100 of electric appliance box, the impact of the electric charge that electric discharge phenomena produce can not be subject to.Preferably, the sound wave frequency band that sensor 10 detects is 20kHz to 70kHz.
Preferably, discharging detection device also comprises: the first photoelectric conversion device 21, to be arranged in casing 100 and to be electrically connected with sensor 10, for converting detection signal to light signal; Second photoelectric conversion device 22, is connected with the first photoelectric conversion device 21, and for converting light signal to electric signal, the second photoelectric conversion device 22 is also connected with control part 30.
Casing 100 surrounding electromagnetic interference (EMI) is serious, and easily the transmission of interference electric signal, makes electric signal distortion misalignment.Because sensor 10 is arranged in casing 100, so the transfer mode of casing 100 inside is designed to light signal transmission by the present invention, light signal can not be subject to the impact of electromagnetic interference (EMI), so detection signal complete and accurate can be delivered to the more weak place of electromagnetic interference (EMI), ensure the accuracy of detection signal in transmittance process.
Preferably, the second photoelectric conversion device 22 is connected with control part 30 wireless telecommunications.Preferably, discharging detection device also comprises: wireless transmitting unit 23, is electrically connected with the second photoelectric conversion device 22, for being that wireless signal sends by transform electrical signals; Radio receiving unit 24, is electrically connected with control part 30, for receiving wireless signal.Wireless telecommunications can be adopted outside casing 100 to transmit detection signal, do not need independent signalization cable like this, reduce the workload that electric appliance box is set.
Preferably, electric appliance box also comprises display part 40, is electrically connected with control part 30, for display alarm signal.Control part 30 and display part 40 all can be arranged in pulpit, and pulpit arranges person on duty, and the alerting signal of moment monitoring discharging detection device, to find potential safety hazard as early as possible, takes treatment measures as early as possible.
Preferably, sensor 10 is arranged on the inner side of the chamber door of casing 100.Be convenient to the dismounting of sensor 10 like this, during sensor installation 10, only need the chamber door opening casing 100, just can on the inwall of chamber door sensor installation 10, and do not need staff to climb in casing 100 to install.
Preferably, electric appliance box also comprises sensor support base, and sensor support base is arranged on the inwall of casing 100, and sensor 10 is arranged on sensor support base, and the internal wall separates of sensor 10 with casing 100 leaves by sensor support base.In order to ensure the accuracy that sensor 10 is measured, the present invention is also provided with sensor support base in casing 100, sensor 10 and casing 100 are kept apart, avoid vibration effect sensor 10 measurement accuracy transmitted along casing 100, efficiently avoid the generation of false alarm.Preferably, sensor support base is made up of insulating material.
Preferably, discharging detection device also comprise the shell be made up of insulating material.
The present invention realizes the anti-interference of Signal transmissions by opto-electronic conversion, and the shell of discharging detection device adopts insulating material, has both ensured the safety of the person and discharging detection device, and has guaranteed again effectively to reject interference.Put into practice the data obtained through applicant, the gain of discharging detection device of the present invention can reach 60dB to 80dB, and far above the gain of the 40dB of current mainstream sensor, and antijamming capability is strong, and safety and reliability is better than existing external detection equipment.
Adopt the electric appliance box of the application effectively can avoid the contingent multiple accident of electric equipment, ensure the stability that electric appliance box equipment runs.
According to another aspect of the present invention, additionally provide a kind of discharge examination alarm method of electric appliance box, comprising: sensor 10 is set in the casing 100 of electric appliance box, the ultrasound wave excited when discharging with the electric elements detecting electric appliance box; Detecting in hyperacoustic situation, reporting to the police and disconnect the power supply of electric appliance box.Directly cutting off the power supply of electric appliance box when electric discharge phenomena being detected, more serious accident can be avoided to occur, prevent trouble before it happens.
Preferably, this discharge examination alarm method also comprises: the outside being delivered to casing 100 after the output signal of sensor 10 is converted into light signal, and after light signal is further converted to electric signal, wirelessly send to control part 30, to be reported to the police by control part 30 and to disconnect the power supply of electric appliance box.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an electric appliance box, the electric elements comprising casing (100) and be arranged in described casing (100), it is characterized in that, described electric appliance box also comprises discharging detection device, described discharging detection device comprises:
Sensor (10), is arranged in described casing (100), the ultrasound wave excited during for detecting the electric discharge of described electric elements;
Control part (30), is electrically connected with described sensor (10), for sending alerting signal according to the detection signal of described sensor (10).
2. electric appliance box according to claim 1, is characterized in that, described discharging detection device also comprises:
First photoelectric conversion device (21), to be arranged in described casing (100) and to be electrically connected with described sensor (10), for converting described detection signal to light signal;
Second photoelectric conversion device (22), is connected with described first photoelectric conversion device (21), and for converting described light signal to electric signal, described second photoelectric conversion device (22) is also connected with described control part (30).
3. electric appliance box according to claim 2, is characterized in that, described second photoelectric conversion device (22) is connected with described control part (30) wireless telecommunications.
4. electric appliance box according to claim 3, is characterized in that, described discharging detection device also comprises:
Wireless transmitting unit (23), is electrically connected with described second photoelectric conversion device (22), for being that wireless signal sends by described transform electrical signals;
Radio receiving unit (24), is electrically connected with described control part (30), for receiving described wireless signal.
5. electric appliance box according to claim 1, is characterized in that, described electric appliance box also comprises display part (40), is electrically connected with described control part (30), for showing described alerting signal.
6. electric appliance box according to claim 1, is characterized in that, described sensor (10) is arranged on the inner side of the chamber door of described casing (100).
7. electric appliance box according to claim 1, it is characterized in that, described electric appliance box also comprises sensor support base, described sensor support base is arranged on the inwall of described casing (100), described sensor (10) is arranged on described sensor support base, and the internal wall separates of described sensor (10) with described casing (100) is opened by described sensor support base.
8. electric appliance box according to claim 1, is characterized in that, described sensor (10) is piezoceramic transducer.
9. a discharge examination alarm method for electric appliance box, is characterized in that, comprising:
Sensor (10) is set in the casing (100) of described electric appliance box, the ultrasound wave excited when discharging with the electric elements detecting described electric appliance box;
Detecting in described hyperacoustic situation, reporting to the police and disconnect the power supply of described electric appliance box.
10. discharge examination alarm method according to claim 9, is characterized in that, described method also comprises:
The outside of described casing (100) is delivered to after the output signal of described sensor (10) is converted into light signal, and after described light signal is further converted to electric signal, wirelessly send to control part (30), to report to the police by described control part (30) and to disconnect the power supply of described electric appliance box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310464680.8A CN104515935A (en) | 2013-10-08 | 2013-10-08 | Electrical box and discharging detection alarm method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310464680.8A CN104515935A (en) | 2013-10-08 | 2013-10-08 | Electrical box and discharging detection alarm method thereof |
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| CN104515935A true CN104515935A (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310464680.8A Pending CN104515935A (en) | 2013-10-08 | 2013-10-08 | Electrical box and discharging detection alarm method thereof |
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Citations (7)
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| JPH03251011A (en) * | 1990-02-28 | 1991-11-08 | Toshiba Corp | Partial discharge detector |
| CN1372645A (en) * | 1999-09-02 | 2002-10-02 | 特兰斯格里德公司 | Partial discharge monitoring system for transformers |
| CN201355384Y (en) * | 2009-02-20 | 2009-12-02 | 厦门红相电力设备股份有限公司 | System for detecting and managing partial discharge of switch cabinet on-line |
| CN101930869A (en) * | 2010-08-17 | 2010-12-29 | 安徽鑫龙电器股份有限公司 | High-voltage vacuum breaker with contact temperature measurement function and temperature measurement method thereof |
| 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 |
| CN102520324A (en) * | 2011-12-27 | 2012-06-27 | 镇江市诚翔电器有限责任公司 | On-line insulation monitoring system for intelligent medium voltage switchgear and monitoring method of system |
| CN102707205A (en) * | 2012-06-06 | 2012-10-03 | 扬州新扬开关设备有限公司 | Safety alarm equipment of high voltage switch cabinet |
-
2013
- 2013-10-08 CN CN201310464680.8A patent/CN104515935A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03251011A (en) * | 1990-02-28 | 1991-11-08 | Toshiba Corp | Partial discharge detector |
| CN1372645A (en) * | 1999-09-02 | 2002-10-02 | 特兰斯格里德公司 | Partial discharge monitoring system for transformers |
| CN201355384Y (en) * | 2009-02-20 | 2009-12-02 | 厦门红相电力设备股份有限公司 | System for detecting and managing partial discharge of switch cabinet on-line |
| CN101930869A (en) * | 2010-08-17 | 2010-12-29 | 安徽鑫龙电器股份有限公司 | High-voltage vacuum breaker with contact temperature measurement function and temperature measurement method thereof |
| 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 |
| CN102520324A (en) * | 2011-12-27 | 2012-06-27 | 镇江市诚翔电器有限责任公司 | On-line insulation monitoring system for intelligent medium voltage switchgear and monitoring method of system |
| CN102707205A (en) * | 2012-06-06 | 2012-10-03 | 扬州新扬开关设备有限公司 | Safety alarm equipment of high voltage switch cabinet |
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Application publication date: 20150415 |
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