CN107966653B - Gas relay monitoring device - Google Patents
Gas relay monitoring device Download PDFInfo
- Publication number
- CN107966653B CN107966653B CN201710967244.0A CN201710967244A CN107966653B CN 107966653 B CN107966653 B CN 107966653B CN 201710967244 A CN201710967244 A CN 201710967244A CN 107966653 B CN107966653 B CN 107966653B
- Authority
- CN
- China
- Prior art keywords
- relay
- gas
- signal processor
- capacitance
- production rate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012806 monitoring device Methods 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims description 5
- 238000011161 development Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The embodiment of the invention provides a gas relay monitoring device, which comprises: the gas relay device comprises a gas relay device, a signal processor, a first capacitance relay and a second capacitance relay, wherein the two capacitance relays are arranged at a first preset position and a second preset position respectively, when an insulating oil liquid level drops to the two preset positions, the two capacitors can send signals to the signal processor respectively, the signal processor records the time at the moment respectively, and the gas production rate of the gas relay device can be obtained according to the vertical height difference and the two time differences of the two preset positions. The embodiment of the invention solves the problem that the internal fault development degree of the transformer can not be judged according to the gas production rate of light gas when the gas relay works normally in the prior art, and is convenient for workers to maintain.
Description
Technical Field
The invention relates to the field of gas relays, in particular to a gas relay monitoring device.
Background
The gas relay is arranged on a connecting pipe of a transformer box cover and an oil conservator, when the inside of the oil immersed transformer breaks down, the electric arc enables the insulating material to be decomposed and generate a large amount of gas or causes oil flow to rush, the contact of the relay is enabled to act so as to switch on a designated control loop, and a signal is sent out in time or the transformer is cut off automatically.
At present, the gas relay protection has two conditions of light gas and heavy gas. When the oil surface is lowered by a scale mark, the light gas is electrically shocked and conducted, and the light gas sends out an alarm signal. When the light gas sends out an alarm signal, the gas production rate in the light gas cannot be known, and a worker usually needs to judge the development degree of the internal fault of the transformer by means of the gas production rate in the light gas so as to make a maintenance decision. Therefore, the problem that the development degree of the internal fault of the transformer cannot be judged according to the gas production rate of the light gas when the gas relay works normally in the prior art is solved.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the problem that the prior art cannot determine the development degree of the internal fault of the transformer through the gas production rate of the light gas when the buchholz relay normally works, thereby providing a buchholz relay detection device.
Therefore, the embodiment of the invention provides the following technical scheme:
the embodiment of the invention provides a gas relay monitoring device, which comprises: the gas relay device comprises a gas relay device, a signal processor, a first capacitance relay and a second capacitance relay, wherein the gas relay device is internally filled with insulating oil; the first capacitor relay is arranged at a first preset position in the gas relay monitoring device; the second capacitance relay is arranged at a second preset position in the gas relay monitoring device; when the insulating oil liquid level in the gas relay device is lowered to the first preset position, the first capacitance relay sends a first capacitance change signal to the signal processor, and the signal processor records the first time; when the insulating oil liquid level in the gas relay device is lowered to the second preset position, the second capacitance relay sends a second capacitance change signal to the signal processor, and the signal processor records the second time; and the signal processor calculates the gas production rate of the gas relay device according to the first preset position, the second preset position, the first time and the second time.
Preferably, the signal processor calculates the term of birth rate V according to the formula: H/(T2-T1), wherein H is the vertical height difference between the first preset position and the second preset position; t2 is the second time; t1 is the first time.
Preferably, the buchholz relay monitoring device further includes: and the signal processor judges whether the gas production rate is greater than a preset threshold value, and when the gas production rate is greater than the preset threshold value, the signal processor sends an alarm signal to the alarm device to drive the alarm device to alarm.
Preferably, the buchholz relay monitoring device further includes: and the display displays the gas production rate.
Preferably, the gas relay monitoring device is further provided with a communication interface for transmitting the gas production rate calculated by the signal processor to an external terminal.
The technical scheme of the embodiment of the invention has the following advantages:
according to the embodiment of the invention, the two capacitor relays are respectively arranged at the first preset position and the second preset position, when the insulating oil liquid level is lowered to the two preset positions, the two capacitors respectively send signals to the signal processor, the signal processor simultaneously records the time at the moment, and the gas production rate of the gas relay device can be obtained according to the vertical height difference and the two time differences of the two preset positions, so that a worker can know the gas production rate in the gas relay device in real time, and the internal fault development degree of the gas relay is rapidly judged according to the gas production, so that a maintenance decision is made, and the maintenance of the worker is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a block diagram of a monitoring device of a buchholz relay according to an embodiment of the present invention;
FIG. 2 is a top view of a cross section of a buchholz relay device of the buchholz relay monitoring device according to the embodiment of the invention;
fig. 3 is an equivalent capacitor structure diagram formed by a capacitor relay and a buchholz relay device of the buchholz relay monitoring device according to the embodiment of the invention;
fig. 4 is another structural block diagram of the buchholz relay monitoring device according to the embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
An embodiment of the present invention provides a buchholz relay monitoring device, fig. 1 is a structural block diagram of the buchholz relay monitoring device in the embodiment of the present invention, and as shown in fig. 1, the buchholz relay monitoring device includes: the gas relay device 10, the signal processor 20, the first capacitive relay 30 and the second capacitive relay 40.
Wherein, the interior of the gas relay monitoring device is filled with insulating oil; the first capacitive relay 30 is disposed at a first predetermined position a inside the buchholz relay device 10, and the second capacitive relay 40 is disposed at a second predetermined position B inside the buchholz relay device 10.
In a preferred embodiment, the first predetermined position is a position of the top end inside the buchholz relay 10, so that the first capacitance change signal that the insulating oil inside the buchholz relay 10 starts to descend when the gas is generated due to the internal failure is detected by the first capacitance relay 30; the second preset position is an intermediate position of the liquid level when the inside of the buchholz relay 10 is filled with the insulating oil, so that the second capacitance relay 40 detects that the insulating oil inside the buchholz relay 10 falls to the second preset position, and transmits a second capacitance change signal to the signal processor 20.
Fig. 2 is a plan view of a cross section of a buchholz relay device of a buchholz relay monitoring device according to an embodiment of the present invention, as shown in fig. 2, a capacitance relay 30 and a capacitance relay 40 are disposed outside a glass monitoring window 80 on one side of the buchholz relay device, inner metal chips of the capacitance relay 30 and the capacitance relay 40 and a metal casing of the buchholz relay device 10 are equivalent to two plates of a capacitor through glass, air or insulating oil inside the buchholz relay device 10 is used as a capacitance medium, and four capacitors C1, C2, C3 and C4 can be equivalent to be preset in parallel through the casing of the buchholz relay device 10, as shown in fig. 3. The dielectric constant of air is about 1, and the dielectric constant of insulating oil is between 2.2 and 2.4, so the insulating medium in the equivalent capacitor changes along with the change of the insulating oil level, and when the insulating oil level drops to the positions of the capacitor relay 30 and the capacitor relay 40, the output capacitance changes along with the change of the insulating medium, and a corresponding capacitance change signal is generated. Therefore, the liquid level information in the gas relay device can be known in real time by monitoring the change of the capacitance.
When the insulating oil level in the buchholz relay device drops to the first preset position a, the first capacitance relay 30 located at the first preset position a monitors that the capacitance changes, and sends a first capacitance change signal to the signal processor 20, and the signal processor records the first time T1 at this time.
When the insulating oil level in the interior of the buchholz relay device drops to the second preset position B, the second capacitance relay 40 located at the second preset position B monitors that the capacitance changes, and sends a second capacitance change signal to the signal processor 20, and the signal processor records the second time T2 at this time.
The signal processor 20 calculates the gas production rate inside the buchholz relay device 10 according to the first preset position a, the second preset position B, the first time T1 and the second time T2.
The gas relay monitoring device provided by the embodiment of the invention can quickly obtain the gas production rate in the gas relay device, so that a worker can quickly make a judgment according to the gas production rate, when the gas production rate is too high, the gas relay device is possibly seriously failed, corresponding measures are required to be taken immediately, and if the gas production rate is higher, the gas relay monitoring device can continuously pay attention by adopting a mode of shortening the period tracking analysis. This allows the personnel to perform maintenance better.
In one embodiment, the signal processor 20 can calculate the gas production rate V of the buchholz relay device 10 according to the formula V/(T2-T1), where H is the vertical height difference between the first predetermined position a and the second predetermined position B, T1 is the first time, and T2 is the second time.
Preferably, fig. 4 is another structural block diagram of the buchholz relay monitoring device according to the embodiment of the present invention, and as shown in fig. 4, the buchholz relay monitoring device according to the embodiment of the present invention further includes: and in the alarm device 50, the signal processor 20 judges whether the gas production rate V is greater than a preset threshold value V1, and when the gas production rate V is greater than a preset threshold value V1, the signal processor 20 sends an alarm signal to the alarm device 50 to drive the alarm device 50 to perform sound-light alarm. If the gas production rate V is higher, is smaller than a preset threshold value V1 and is larger than another preset threshold value V2, the attention can be continued by adopting a mode of shortening the period tracking analysis, and the attention of workers is prompted. When the gas production rate of the current gas relay device is too high, the working personnel takes emergency treatment measures according to actual conditions.
Preferably, as shown in fig. 4, the buchholz relay monitoring device further includes: and the display 60 is used for displaying the information of the gas production rate V in real time, so that the staff can conveniently read the corresponding rate in time to make corresponding judgment.
Preferably, as shown in fig. 4, the buchholz relay monitoring device is further provided with a communication interface 70 for transmitting the gas production rate calculated by the signal processor 20 to an external terminal. In an alternative embodiment, the communication interface 70 may be a 485 communication interface, which may simultaneously enable uploading the rate information to the background, and enable sharing of the current information with the background.
Through the process, the problem that the gas production rate inside the gas relay cannot be known in time when the gas relay breaks down in the prior art is solved, so that the fault development degree inside the gas relay can be judged according to the gas production rate, and the gas relay maintenance method is beneficial to workers to maintain.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (5)
1. A buchholz relay monitoring device, comprising: a gas relay device, a signal processor, a first capacitance relay and a second capacitance relay,
the interior of the gas relay device is filled with insulating oil; the first capacitor relay is arranged at a first preset position in the gas relay device; the second capacitor relay is arranged at a second preset position in the gas relay device;
when the insulating oil liquid level in the gas relay device is lowered to the first preset position, the first capacitance relay sends a first capacitance change signal to the signal processor, and the signal processor records the first time;
when the insulating oil liquid level in the gas relay device is lowered to the second preset position, the second capacitance relay sends a second capacitance change signal to the signal processor, and the signal processor records the second time;
and the signal processor calculates the gas production rate of the gas relay device according to the first preset position, the second preset position, the first time and the second time.
2. The buchholz relay monitoring device according to claim 1, wherein said signal processor calculates said gas production rate V according to the following formula:
V＝H/(T2-T1)，
h is the vertical height difference between the first preset position and the second preset position; t2 is the second time; t1 is the first time.
3. The buchholz relay monitoring device according to claim 1, further comprising: and the signal processor judges whether the gas production rate is greater than a preset threshold value, and when the gas production rate is greater than the preset threshold value, the signal processor sends an alarm signal to the alarm device to drive the alarm device to alarm.
4. The buchholz relay monitoring device according to claim 1, further comprising: and the display displays the gas production rate.
5. The buchholz relay monitoring device according to claim 1, wherein said buchholz relay monitoring device is further provided with a communication interface for transmitting said gas production rate calculated by said signal processor to an external terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967244.0A CN107966653B (en) | 2017-10-17 | 2017-10-17 | Gas relay monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967244.0A CN107966653B (en) | 2017-10-17 | 2017-10-17 | Gas relay monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107966653A CN107966653A (en) | 2018-04-27 |
| CN107966653B true CN107966653B (en) | 2020-09-04 |
Family
ID=61997595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710967244.0A Active CN107966653B (en) | 2017-10-17 | 2017-10-17 | Gas relay monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107966653B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514948A (en) * | 2019-08-02 | 2019-11-29 | 山东电力设备有限公司 | A kind of load switch of transformer on-Line Monitor Device |
| CN113280884A (en) * | 2020-02-20 | 2021-08-20 | 阳江核电有限公司 | Gas quantity monitoring system, method and storage medium for gas relay of oil-immersed transformer |
| CN111446069B (en) * | 2020-03-24 | 2021-03-12 | 广东电网有限责任公司电力科学研究院 | Protection method, system, device and equipment for oil-immersed transformer |
| CN111664919A (en) * | 2020-07-03 | 2020-09-15 | 国网四川省电力公司绵阳供电公司 | Light-sensitive light gas relay |
| CN112630637B (en) * | 2020-11-20 | 2023-05-30 | 国网山东省电力公司青岛供电公司 | Online checking system and method for gas relay of power transformer |
| CN114047266B (en) * | 2021-11-10 | 2024-01-16 | 中国南方电网有限责任公司超高压输电公司大理局 | Inspection method, device and system for gas relay light gas monitoring device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201975334U (en) * | 2011-03-23 | 2011-09-14 | 刘畅 | Gas relay with on-line monitoring function |
| CN104950931A (en) * | 2015-06-30 | 2015-09-30 | 成都众山科技有限公司 | Water tank liquid level monitoring device |
| CN106840314B (en) * | 2017-02-09 | 2019-04-19 | 广东电网有限责任公司东莞供电局 | A kind of electric system Buchholz relay oil level indicating means and device |
-
2017
- 2017-10-17 CN CN201710967244.0A patent/CN107966653B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107966653A (en) | 2018-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107966653B (en) | Gas relay monitoring device | |
| CN202582602U (en) | Transformer running state comprehensive monitoring system | |
| CN102494737A (en) | Oil level monitoring method and system of oil immersed type transformer | |
| CN110850327A (en) | Fault monitoring system and method for railway power supply screen | |
| CN105371967A (en) | Power cable joint temperature measuring device | |
| CN202508119U (en) | Turnout gap monitoring system | |
| KR20150121369A (en) | Gis preventive diagnostic system and gas pressure monitoring method thereof | |
| EA036875B1 (en) | Coupling capacitor condition monitoring system | |
| JP2018004387A (en) | Gradient monitoring system and method | |
| CN110987127A (en) | Online liquid level monitoring method and system for oil-immersed transformer | |
| CN104316134B (en) | Oil-immersed and high-voltage Oil-filled Electrical Equipments position monitoring method | |
| EP4280250A1 (en) | Systems and methods for monitoring electrical fuses | |
| CN108905034A (en) | A kind of fire fighting device information monitoring system | |
| CN108457699A (en) | Driving face floods alarm system based on infrared image | |
| CN109212395B (en) | High-voltage switch cabinet partial discharge monitoring method | |
| CN106600168A (en) | Power grid responsibility area information verification method, device and system | |
| CN109212394A (en) | A kind of high-tension switch cabinet partial discharge monitoring system | |
| CN110726390A (en) | Civil air defense door posture detection device and detection method | |
| CN217305970U (en) | Circuit breaker hydraulic mechanism oil leakage alarm system | |
| CN108917885A (en) | A kind of grid equipment oil level monitoring system based on technology of Internet of things | |
| CN104990634A (en) | Cable head temperature online monitoring device | |
| CN210571051U (en) | Wireless temperature measurement centralized control device with high reliability | |
| CN109036811A (en) | A kind of oil immersion-type distribution transformer with warning function | |
| CN217953788U (en) | Device for monitoring leakage of air separation cold box | |
| CN216083929U (en) | Fire-fighting water pressure detection alarm device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Shinan District 266003 Shandong city of Qingdao province Liujiaxia Road No. 17 in Qingdao power supply company Applicant after: Qingdao Power Supply Company, State Grid Shandong Electric Power Company Applicant after: State Grid Co., Ltd. Address before: Shinan District 266003 Shandong city of Qingdao province Liujiaxia Road No. 17 in Qingdao power supply company Applicant before: Qingdao Power Supply Company, State Grid Shandong Electric Power Company Applicant before: State Grid Corporation |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |