CN117310557A - Transformer light gas contact conduction field detection device - Google Patents
Transformer light gas contact conduction field detection device Download PDFInfo
- Publication number
- CN117310557A CN117310557A CN202311291258.7A CN202311291258A CN117310557A CN 117310557 A CN117310557 A CN 117310557A CN 202311291258 A CN202311291258 A CN 202311291258A CN 117310557 A CN117310557 A CN 117310557A
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- transformer
- light gas
- detection device
- gas contact
- module
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000012545 processing Methods 0.000 claims abstract description 30
- 238000004891 communication Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 16
- 230000009471 action Effects 0.000 abstract description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004313 potentiometry Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention relates to the technical field of power systems, in particular to a transformer light gas contact conduction field detection device, which is provided with an inflator pump, a voltage acquisition circuit, a resistor acquisition circuit and a central processing unit, wherein the transformer light gas contact conduction field detection device is used for verifying correctness of a transformer light gas contact and a signal loop, so that reliable actions of the transformer light gas contact can be ensured, the transformer light gas signal loop is correct, the reliability of safe operation of the transformer is improved, and the automatic switching between a resistor method and a potential method can be automatically realized by adopting the 'dual-mode' detection of the conduction of the transformer light gas contact, so that the burning of a detection instrument is prevented, the labor cost can be greatly reduced, and the detection safety is improved.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a light gas contact conduction field detection device of a transformer.
Background
The gas protection of the transformer of the power system is the main protection of the transformer, and can effectively reflect the internal faults of the transformer. The light gas relay consists of an opening cup, a dry spring contact and the like, and acts on signals. The light gas mainly reflects that gas decomposed by oil rises into the gas relay when running or slightly fails, the gas pressure enables the oil surface to fall, an opening cup of the relay falls along with the oil surface, the light gas dry spring is in contact connection to send out signals, and when the gas in the light gas is excessive, the gas can be discharged by the gas tap of the gas relay. During normal operation, the gas relay is full of oil, the opening cup is immersed in the oil and is positioned at the floating position, and the reed contact is disconnected. When the fault is slight, the discharged gas slowly rises and enters the gas relay, so that the oil level is lowered, the pivot point generated by the opening cup rotates anticlockwise, the spring contacts and is connected, and a signal is sent.
The traditional method for identifying the correctness of the action of the light gas contact of the transformer is to adopt an inflation method to inject gas from a gas release valve on the top cover of the gas relay, so that when the quantity of the gas gathered in the relay reaches a setting value (250-300 m), the signal contact reliably acts and sends out a signal. The transformer is matched with a control room by a plurality of people, the gas relay is inflated by the people on the transformer, the people on the control room are responsible for monitoring whether the protection screen signals, the correctness of the light gas contact of the transformer gas relay cannot be checked rapidly by the method, if the transformer gas relay light gas signal loop is electrified by a universal meter, if the universal meter resistance is electrified, the universal meter is easy to burn, and the field detection safety risk is large.
Disclosure of Invention
Therefore, the invention aims to provide a light gas contact conduction field detection device for a transformer, so as to solve the problems of low efficiency and high risk of the traditional test method.
Based on the above purpose, the invention provides a device for detecting the conduction of a light gas contact of a transformer on site, which comprises an inflator pump, a voltage acquisition circuit, a resistance acquisition circuit and a central processing unit, wherein the inflator pump is used for injecting gas into the light gas of the transformer, and the voltage acquisition circuit and the resistance acquisition circuit are connected in parallel and are connected to two ends of the light gas contact of the transformer;
the voltage acquisition circuit comprises a voltage acquisition module and contacts of a first relay which are connected in series, and when the contacts of the first relay are closed, the voltage acquisition circuit is communicated with the transformer light gas contacts and is used for measuring voltages at two ends of the transformer light gas contacts;
the resistance acquisition circuit comprises a resistance acquisition module and contacts of a second relay which are connected in series, and when the contacts of the second relay are closed, the resistance acquisition circuit is communicated with the transformer light gas contacts and is used for measuring the resistances at two ends of the transformer light gas contacts;
the central processing unit is used for collecting measured values of the voltage collecting module and the resistance collecting module, and when no voltage is detected at two ends of the light gas contact of the transformer, the contact of the first relay is disconnected, and the contact of the second relay is connected.
Preferably, the detection device further comprises an air pressure sensor acquisition module, the inflator pump is connected with an inflator pump driving module, the central processing unit acquires an air pressure value measured by the air pressure sensor acquisition module, and when the air pressure value exceeds a set value, the central processing unit controls the inflator pump to stop inflating through the inflator pump driving module.
Preferably, the air pressure sensor acquisition module adopts an XGZP6847A type pressure sensor, the air pressure sensor is connected to an input end of an MS51FB9AE type processing chip, and an output end of the processing chip is connected to the central processor.
Preferably, the central processor employs an F1C100S type processor chip.
Preferably, the voltage acquisition module and the resistance acquisition module are both connected to the central processing unit through a signal input module.
Preferably, the central processing unit is also connected with a parameter storage module.
Preferably, the central processing unit is also connected with a Bluetooth communication module.
The invention has the beneficial effects that:
1. the on-site detection device for the conduction of the transformer light gas contact is used for verifying the correctness of the transformer light gas contact and the signal loop, so that the reliable action of the transformer light gas contact can be ensured, the signal loop of the transformer light gas is correct, and the reliability of the safe operation of the transformer is improved.
2. The 'dual mode' detection of the conduction of the light gas contact of the transformer is adopted, so that the automatic switching between a resistance method and a potential method can be automatically realized, and the burning of a detection instrument is prevented.
3. The transformer light gas double-control electric gas injection is adopted, so that the action and protection two-stage control can be automatically realized, and the damage to the transformer night relay in the gas injection process is prevented.
4. Compared with the existing transformer light gas field detection mode, the labor cost can be greatly reduced.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dual mode principle of potentiometry and resistivity method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of connection of a detection device module according to an embodiment of the invention.
Detailed Description
The present invention will be further described in detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
As shown in fig. 1 and fig. 2, the embodiment of the present disclosure provides a device for detecting conduction of a light gas contact of a transformer, which includes an inflator pump, a voltage acquisition circuit, a resistance acquisition circuit and a central processing unit, wherein the inflator pump is used for injecting gas into the light gas of the transformer, and the voltage acquisition circuit and the resistance acquisition circuit are connected in parallel and are both connected to two ends of the light gas contact of the transformer;
the voltage acquisition circuit comprises a voltage acquisition module and contacts of a first relay S1 which are connected in series, and when the contacts of the first relay S1 are closed, the voltage acquisition circuit is communicated with the transformer light gas contacts and is used for measuring voltages at two ends of the transformer light gas contacts;
the resistance acquisition circuit comprises a resistance acquisition module and contacts of a second relay S2 which are connected in series, and when the contacts of the second relay S2 are closed, the resistance acquisition circuit is communicated with the transformer light gas contacts and is used for measuring the resistances at two ends of the transformer light gas contacts;
the central processing unit is used for collecting measured values of the voltage collecting module and the resistance collecting module, and when no voltage is detected at two ends of the light gas contact of the transformer, the contact of the first relay S1 is disconnected, and the contact of the second relay S2 is connected.
Under normal conditions, the conduction detection of the transformer light gas contact is preferably carried out by using a potential method, when the transformer light gas contact is not conducted, the voltage at two ends is 220V, then gas is injected into the transformer gas relay, when the quantity of gas accumulated in the relay reaches a set value (250-300 m), the transformer light gas signal contact reliably acts, and when the voltage at two ends of the transformer light gas contact is 0V, the transformer light gas contact is judged to act correctly. If no voltage is detected at the two ends of the light gas contact of the transformer by adopting a potential method, the central processing unit gives an instruction to disconnect the contact of the first relay S1, close the contact of the second relay S2, automatically change the detection into a resistance method for detection, then gas is injected into the gas relay of the transformer, when the quantity of gas accumulated in the relay reaches a setting value (250-300 m), the light gas signal contact of the transformer reliably acts, and the resistance at the two ends of the light gas contact of the transformer is 0 ohm. The method adopts the 'double-mode' detection of the conduction of the light gas contact of the transformer, adopts the potential method to detect when the voltage at the two ends of the light gas contact of the transformer has the voltage, and automatically switches to the resistance method to detect when the voltage at the two ends of the light gas contact of the transformer has no voltage, thereby realizing the 'double-mode' detection of the conduction of the light gas contact of the transformer.
As one implementation mode, the detection device further comprises an air pressure sensor acquisition module, the air pump is connected with an air pump driving module, the central processing unit acquires an air pressure value measured by the air pressure sensor acquisition module, and when the air pressure value exceeds a set value, the central processing unit controls the air pump to stop inflating through the air pump driving module so as to realize protection control by detecting a pressure value when the action control of the light gas contact of the transformer fails or does not work.
As an implementation manner, the air pressure sensor acquisition module adopts an XGZP6847A type pressure sensor, the air pressure sensor is connected to an input end of an MS51FB9AE type processing chip, and an output end of the processing chip is connected to the central processor.
As one embodiment, the central processor employs an F1C100S type processor chip.
As an implementation mode, the voltage acquisition module and the resistance acquisition module are connected to the central processing unit through the signal input module.
As one implementation, the central processing unit is further connected with a parameter storage module, for example, the parameter storage module may use a W25Q128 type storage chip to store various operation parameters of the detection device in the operation process.
As an implementation manner, the central processing unit is also connected with a bluetooth communication module, and can transmit communication signals to the outside.
The device has the electric gas injection function of 'double control' of the transformer light gas. Firstly, action control is performed, and when the transformer light gas is injected electrically, the transformer light gas contact is conducted to stop gas injection. And secondly, protection control is performed, when the pressure exceeds, and the light gas contact of the transformer is not conducted, gas injection is stopped, and safety is further guaranteed.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the invention (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The present invention is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (7)
1. The on-site detection device for the conduction of the light gas contact of the transformer is characterized by comprising an inflator pump, a voltage acquisition circuit, a resistance acquisition circuit and a central processing unit, wherein the inflator pump is used for injecting gas into the light gas of the transformer, and the voltage acquisition circuit and the resistance acquisition circuit are connected in parallel and are connected to two ends of the light gas contact of the transformer;
the voltage acquisition circuit comprises a voltage acquisition module and contacts of a first relay which are connected in series, and when the contacts of the first relay are closed, the voltage acquisition circuit is communicated with the transformer light gas contacts and is used for measuring voltages at two ends of the transformer light gas contacts;
the resistance acquisition circuit comprises a resistance acquisition module and contacts of a second relay which are connected in series, and when the contacts of the second relay are closed, the resistance acquisition circuit is communicated with the transformer light gas contacts and is used for measuring the resistances at two ends of the transformer light gas contacts;
the central processing unit is used for collecting measured values of the voltage collecting module and the resistance collecting module, and when no voltage is detected at two ends of the light gas contact of the transformer, the contact of the first relay is disconnected, and the contact of the second relay is connected.
2. The on-site detection device for the conduction of the light gas contact of the transformer according to claim 1, wherein the detection device further comprises an air pressure sensor acquisition module, the air pump is connected with an air pump driving module, the central processing unit acquires an air pressure value measured by the air pressure sensor acquisition module, and when the air pressure value exceeds a set value, the central processing unit controls the air pump to stop inflating through the air pump driving module.
3. The transformer light gas contact conduction field detection device according to claim 2, wherein the air pressure sensor acquisition module adopts an XGZP6847A type pressure sensor, the air pressure sensor is connected to an input end of an MS51FB9AE type processing chip, and an output end of the processing chip is connected to the central processor.
4. The transformer light gas contact conduction field detection device according to claim 1, wherein the central processing unit adopts an F1C100S type processor chip.
5. The transformer light gas contact conduction field detection device according to claim 1, wherein the voltage acquisition module and the resistance acquisition module are both connected to the central processing unit through a signal input module.
6. The transformer light gas contact conduction field detection device according to claim 1, wherein the central processing unit is further connected with a parameter storage module.
7. The transformer light gas contact conduction field detection device according to claim 1, wherein the central processing unit is further connected with a bluetooth communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311291258.7A CN117310557A (en) | 2023-10-08 | 2023-10-08 | Transformer light gas contact conduction field detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311291258.7A CN117310557A (en) | 2023-10-08 | 2023-10-08 | Transformer light gas contact conduction field detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117310557A true CN117310557A (en) | 2023-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311291258.7A Pending CN117310557A (en) | 2023-10-08 | 2023-10-08 | Transformer light gas contact conduction field detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117310557A (en) |
-
2023
- 2023-10-08 CN CN202311291258.7A patent/CN117310557A/en active Pending
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