CN104698351B - switch cabinet partial discharge monitoring device - Google Patents
switch cabinet partial discharge monitoring device Download PDFInfo
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- CN104698351B CN104698351B CN201510076715.XA CN201510076715A CN104698351B CN 104698351 B CN104698351 B CN 104698351B CN 201510076715 A CN201510076715 A CN 201510076715A CN 104698351 B CN104698351 B CN 104698351B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 15
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- 238000004458 analytical method Methods 0.000 description 2
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Abstract
The invention discloses a switch cabinet partial discharge monitoring device, which belongs to the field of power equipment and comprises an ultraviolet detector, a controller and a controller, wherein the ultraviolet detector is used for detecting an ultraviolet signal generated during partial discharge of a switch cabinet; the alarm is connected with the ultraviolet detector and used for amplifying and denoising the ultraviolet signal to obtain an alarm control signal, wherein the alarm control signal is used for controlling an ultraviolet indicating unit of the alarm to indicate the partial discharge of the switch cabinet and a counter of the alarm to record the number of times of the partial discharge of the switch cabinet; and the power supply unit is used for providing power for the ultraviolet detector and the alarm. Compared with other discharge monitoring means, the device has the advantages of low price, convenience in installation, convenience in inspection and the like through the technical scheme; has good popularization prospect.
Description
Technical Field
the invention relates to the field of electric power, in particular to a switch cabinet partial discharge monitoring device.
background
The switch cabinet is an important electrical device of a power plant and a transformer substation, and internal electrical elements are compact in arrangement and small in distance, so that accidents are easily developed after electric discharge occurs, and the switch cabinet cannot normally work. Since the stable operation of the switch cabinet directly affects the local industrial and agricultural production, it is necessary to monitor the discharge phenomenon of the switch cabinet.
In the prior art, an operation and maintenance person generally judges whether a discharging phenomenon exists in a switch cabinet through sound, but the method easily causes missed judgment and misjudgment, particularly for intermittent discharging, the operation and maintenance person using the method is not easy to find in an inspection process, and the misjudgment is very easy to be carried out on normal operation of the switch cabinet, so that accident potential is buried.
Disclosure of Invention
In order to solve the above problems, the present invention provides a switch cabinet partial discharge monitoring device, which includes: the ultraviolet detector is used for detecting an ultraviolet signal generated when the switch cabinet is partially discharged; the alarm is connected with the ultraviolet detector and used for amplifying and denoising the ultraviolet signal to obtain an alarm control signal, wherein the alarm control signal is used for controlling an ultraviolet indicating unit of the alarm to indicate the partial discharge of the switch cabinet and a counter of the alarm to record the number of times of the partial discharge of the switch cabinet; and the power supply unit is used for providing power for the ultraviolet detector and the alarm.
In the switch cabinet partial discharge monitoring device, preferably, in the alarm, one end of a first resistor is respectively connected to the positive electrode of the power supply unit, the collector of the first triode, one end of a first capacitor and the power supply input end of the ultraviolet detector; the other end of the first capacitor is grounded and is also connected with the negative electrode of the power supply unit; two ends of a resistor of the potentiometer are respectively connected with the other end of the first resistor and the output end of the ultraviolet detector, and a sliding end of the potentiometer is connected with the output end of the ultraviolet detector; the base electrode of the first triode is connected with the output end of the ultraviolet detector, the emitter of the first triode is connected with the anode of the light emitting diode of the optical coupler, the cathode of the light emitting diode of the optical coupler is grounded, the collector of the phototriode of the optical coupler is connected with the anode of the power supply unit, and the emitter of the phototriode of the optical coupler is connected with the base electrode of the second triode; the emitter of the second triode is grounded and is also connected with the negative electrode of the power supply unit and the ground end of the ultraviolet detector; the collecting electrode of second triode is connected with the one end of power relay's coil, the other end of power relay's coil with electrical unit's positive pole is connected, power relay's normally open contact's one end with electrical unit's positive pole is connected, power relay's normally open contact's the other end is through counter ground connection, power relay's normally open contact's the other end still in proper order through the second resistance ultraviolet ray indicating unit ground connection.
in the switch cabinet partial discharge monitoring device as described above, preferably, the alarm further includes: a third resistor and a power supply indicating unit; one end of the third resistor is connected with the anode of the power supply, and the other end of the third resistor is grounded through the power supply indicating unit.
In the switch cabinet partial discharge monitoring device, preferably, the ultraviolet indication unit and the power indication unit are LED lamps.
in the device for monitoring partial discharge of the switch cabinet, preferably, the ultraviolet detector and the alarm are integrally installed in a casing, and a probe of the ultraviolet detector is aligned to a through hole in a casing of the switch cabinet through the through hole in the casing so as to detect an ultraviolet signal generated when the switch cabinet is partially discharged.
In the switch cabinet partial discharge monitoring device, preferably, the ultraviolet detector is located on the inner side of the cabinet wall of the switch cabinet, and the alarm is located outside the switch cabinet.
In the switch cabinet partial discharge monitoring device as described above, preferably, the alarm further includes: the ultraviolet intensity indicator lamp is used for indicating the partial discharge intensity of the switch cabinet; the ultraviolet intensity indicator lamp is connected between the positive electrode of the power supply unit and the collector of the second triode.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the device can sensitively capture the discharge condition and reflect the discharge condition through the indicator light and the counter, so that operation and maintenance personnel can conveniently check and judge; compared with other discharge monitoring means, the device has the advantages of low price, convenience in installation, convenience in inspection and the like. Importantly, the device realizes monitoring of intermittent discharge in the switch cabinet, enables all-weather real-time monitoring of the switch cabinet to be possible, and provides data support for equipment fault analysis in the switch cabinet; has good popularization prospect.
Drawings
fig. 1 is a schematic circuit structure connection diagram of a switch cabinet partial discharge monitoring device according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
referring to fig. 1, an embodiment of the present invention provides a switch cabinet partial discharge monitoring apparatus, which includes: ultraviolet detector 20, alarm and power supply unit. The ultraviolet detector 20 is used for detecting an ultraviolet signal generated when the switch cabinet is partially discharged. The alarm is connected with the ultraviolet detector 20 and used for amplifying and denoising ultraviolet signals detected by the ultraviolet detector to obtain alarm control signals, the alarm control signals are used for controlling an ultraviolet indicating unit of the alarm to indicate partial discharge of the switch cabinet and a counter of the alarm to record the number of times of partial discharge of the switch cabinet, the switch cabinet discharges once, the number of times recorded in the counter is increased by 1, namely the number of times of partial discharge of the switch cabinet every time is increased by 1. The power supply unit is used for supplying power to the ultraviolet detector and the alarm.
In the alarm, one end of a first resistor R1 is respectively connected with a positive electrode V + of a power supply unit, a collector of a first triode Q1, one end of a first capacitor C1 and a power supply input end Vcc of an ultraviolet detector; the other end of the first capacitor C1 is grounded and is also connected with the negative pole V-of the power supply unit; two ends of the resistor of the potentiometer W are respectively connected with the other end of the first resistor R1 and the output end Out of the ultraviolet detector 20, and the sliding end of the potentiometer is connected with the output end Out of the ultraviolet detector 20; the base electrode of the first triode Q1 is connected with the output end Out of the ultraviolet detector 20, the emitting electrode of the first triode Q1 is connected with the anode of the light emitting diode of the optical coupler OC, the cathode of the light emitting diode of the optical coupler OC is grounded, the collector electrode of the phototriode of the optical coupler OC is connected with the anode V + of the power supply unit, and the emitting electrode of the phototriode of the optical coupler OC is connected with the base electrode of the second triode Q2; the emitter of the second triode Q2 is grounded and is also connected with the negative pole V of the power supply unit and the ground terminal Gnd of the ultraviolet detector; the collecting electrode of second triode Q2 is connected with the one end of power relay J's coil, and the other end of power relay J's coil is connected with electrical unit's anodal V +, and the one end of power relay J's normally open contact is connected with electrical unit's anodal V +, and power relay J's normally open contact's the other end is through counter 10 ground connection, and power relay J's normally open contact's the other end still is in proper order through second resistance R2, ultraviolet ray indicating unit ground connection. The ultraviolet indicating means is preferably an LED lamp, and is indicated by a symbol LED1 in fig. 1, that is, when the switch cabinet is partially discharged, the LED1 is turned on, and when the switch cabinet is not partially discharged, the LED1 is turned off. The counter is used for counting the times of ultraviolet signals generated by partial discharge of the switch cabinet, and when the counter is applied, 1 is added to each time a discharge pulse signal is received.
The alarm still includes: a third resistor R3 and a power supply indicating unit; one end of the third resistor R3 is connected with the positive pole V + of the power supply, and the other end of the third resistor R3 is grounded through the power supply indicating unit. The power supply indicating unit is an LED lamp, which is represented by a symbol LED2 in fig. 1, that is, when the power supply unit supplies power to the ultraviolet detector 20 and the alarm, the LED2 is turned on, and at this time, the power supply condition of the ultraviolet detector 20 and the alarm is normal, and the normal operation can be performed; when the power supply unit does not supply power to the ultraviolet detector 20 and the alarm, the LED2 is extinguished, and the power supply condition of the ultraviolet detector 20 and the alarm is abnormal at the moment, so that the normal operation cannot be realized. In order to distinguish the ultraviolet indicating unit from the power indicating unit, different color LED lamps may be selected, for example, a red LED lamp for indicating ultraviolet rays and a green LED lamp for indicating power.
The alarm still includes: and the ultraviolet intensity indicator lamp is used for indicating the intensity of an ultraviolet signal generated when the switch cabinet is partially discharged, the higher the intensity is, the higher the brightness of the ultraviolet intensity indicator lamp is, and the ultraviolet intensity indicator lamp is connected between the positive electrode V + of the power supply unit and the collector electrode of the second triode Q2, namely is connected with the power relay in parallel.
When the switch cabinet discharge monitoring device is applied, the ultraviolet detector 20 and the alarm can be of an integral installation structure and are positioned in a shell, and the probe of the ultraviolet detector 20 is aligned to the through hole on the cabinet wall of the switch cabinet through the through hole on the shell so as to detect an ultraviolet signal generated when the switch cabinet is partially discharged. The ultraviolet detector 20 and the alarm may be separately installed, the ultraviolet detector is located in the switch cabinet and is disposed on the inner side of the cabinet wall (i.e., the inner cabinet wall) which is at a safe distance from the conductive portion in the switch cabinet, and the alarm is located outside the switch cabinet.
In practice, the first transistor Q1 and the second transistor Q2 may be of the type C1815, the optocoupler OC of the type PC617-2, and the power relay J of the type SRD-03 VDC.
The working principle of the switch cabinet partial discharge monitoring device provided by the embodiment of the invention is as follows:
the device utilizes the principle that ultraviolet rays are generated when the switch cabinet is electrically discharged, when the conductive part of equipment in the switch cabinet is discharged, an ultraviolet ray signal can be sent out, the ultraviolet ray signal is collected by a detection device (namely an ultraviolet detector), a series of treatments such as amplification, noise reduction and the like are carried out, the coil voltage of a power relay exceeds the action voltage, namely the action is carried out, a normally open contact is closed, an alarm control signal is generated, a counter and an LED1 loop are connected, the counter is increased by 1, an ultraviolet ray indicating unit LED1 is lightened, and a discharge alarm signal is sent out and information is recorded.
In summary, the embodiments of the present invention have the following beneficial effects:
The device can sensitively capture the discharge condition and reflect the discharge condition through the indicator light and the counter, so that operation and maintenance personnel can conveniently check and judge; compared with other discharge monitoring means, the device has the advantages of low price, convenience in installation, convenience in inspection and the like; importantly, the device realizes monitoring of intermittent discharge in the switch cabinet, enables all-weather real-time monitoring of the switch cabinet to be possible, and provides data support for equipment fault analysis in the switch cabinet; has good popularization prospect.
it will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (3)
1. A switchgear partial discharge monitoring device, characterized in that, the switchgear partial discharge monitoring device includes:
The ultraviolet detector is used for detecting an ultraviolet signal generated when the switch cabinet is partially discharged;
The alarm is connected with the ultraviolet detector and used for amplifying and denoising the ultraviolet signal to obtain an alarm control signal, wherein the alarm control signal is used for controlling an ultraviolet indicating unit of the alarm to indicate the partial discharge of the switch cabinet and a counter of the alarm to record the number of times of the partial discharge of the switch cabinet; the alarm further comprises: a third resistor and a power supply indicating unit; one end of the third resistor is connected with the anode of the power supply, and the other end of the third resistor is grounded through the power supply indicating unit; and
The power supply unit is used for providing power for the ultraviolet detector and the alarm; in the alarm, one end of a first resistor is respectively connected with the anode of the power supply unit, the collector of a first triode, one end of a first capacitor and the power supply input end of the ultraviolet detector; the other end of the first capacitor is grounded and is also connected with the negative electrode of the power supply unit;
The ultraviolet indicating unit and the power indicating unit are both LED lamps;
Two ends of a resistor of the potentiometer are respectively connected with the other end of the first resistor and the output end of the ultraviolet detector, and a sliding end of the potentiometer is connected with the output end of the ultraviolet detector;
The base electrode of the first triode is connected with the output end of the ultraviolet detector, the emitter of the first triode is connected with the anode of the light emitting diode of the optical coupler, the cathode of the light emitting diode of the optical coupler is grounded, the collector of the phototriode of the optical coupler is connected with the anode of the power supply unit, and the emitter of the phototriode of the optical coupler is connected with the base electrode of the second triode;
The emitter of the second triode is grounded and is also connected with the negative electrode of the power supply unit and the ground end of the ultraviolet detector;
The collector of the second triode is connected with one end of a coil of a power relay, the other end of the coil of the power relay is connected with the anode of the power supply unit, one end of a normally open contact of the power relay is connected with the anode of the power supply unit, the other end of the normally open contact of the power relay is grounded through a counter, and the other end of the normally open contact of the power relay is grounded through a second resistor and the ultraviolet indicating unit in sequence;
The alarm further comprises: the ultraviolet intensity indicator lamp is used for indicating the partial discharge intensity of the switch cabinet;
The ultraviolet intensity indicator lamp is connected between the positive electrode of the power supply unit and the collector of the second triode.
2. The device for monitoring the partial discharge of the switch cabinet according to claim 1, wherein the ultraviolet detector and the alarm are integrally arranged in a shell, and a probe of the ultraviolet detector is aligned with a through hole in the shell of the switch cabinet through a through hole in the shell so as to detect an ultraviolet signal generated when the switch cabinet is in partial discharge.
3. the switchgear partial discharge monitoring apparatus of claim 1, wherein the ultraviolet detector is located on an inside of a cabinet wall of the switchgear, and the alarm is located outside of the switchgear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510076715.XA CN104698351B (en) | 2015-02-12 | 2015-02-12 | switch cabinet partial discharge monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510076715.XA CN104698351B (en) | 2015-02-12 | 2015-02-12 | switch cabinet partial discharge monitoring device |
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| CN104698351A CN104698351A (en) | 2015-06-10 |
| CN104698351B true CN104698351B (en) | 2019-12-10 |
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| CN201510076715.XA Active CN104698351B (en) | 2015-02-12 | 2015-02-12 | switch cabinet partial discharge monitoring device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110161383B (en) * | 2019-04-30 | 2020-07-28 | 云南电网有限责任公司电力科学研究院 | Switch cabinet partial discharge detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2064067U (en) * | 1989-11-16 | 1990-10-17 | 崔正宪 | Discharge recording device |
| CN103389447A (en) * | 2013-07-31 | 2013-11-13 | 成都电业局双流供电局 | Non-contact ultraviolet pulse discharge monitoring device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8098072B2 (en) * | 2008-09-24 | 2012-01-17 | Siemens Energy, Inc. | Partial discharge coupler for application on high voltage generator bus works |
| 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 |
| CN102288879B (en) * | 2011-04-25 | 2013-04-03 | 天津大学 | Ultrasonic detection device for partial discharge of switchgear based on wireless network |
| 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 |
-
2015
- 2015-02-12 CN CN201510076715.XA patent/CN104698351B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2064067U (en) * | 1989-11-16 | 1990-10-17 | 崔正宪 | Discharge recording device |
| CN103389447A (en) * | 2013-07-31 | 2013-11-13 | 成都电业局双流供电局 | Non-contact ultraviolet pulse discharge monitoring device |
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Inventor after: Liu Shihao Inventor after: Guo Chao Inventor after: Cai Xiaochen Inventor after: Zhou Qian Inventor after: Jia Xiaosong Inventor after: Zhao Jianhua Inventor after: Gao Song Inventor after: Li Yong Inventor after: Ma Ruidong Inventor after: Hu Gang Inventor after: Zhang Shiqi Inventor before: Liu Shihao Inventor before: Cai Xiaochen Inventor before: Jia Xiaosong Inventor before: Zhao Jianhua Inventor before: Gao Song Inventor before: Li Yong Inventor before: Ma Ruidong Inventor before: Hu Gang Inventor before: Zhang Shiqi Inventor before: Guo Chao |
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