CN209979019U - Transformer oil level on-line monitoring system with temperature compensation - Google Patents
Transformer oil level on-line monitoring system with temperature compensation Download PDFInfo
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- CN209979019U CN209979019U CN201920950442.0U CN201920950442U CN209979019U CN 209979019 U CN209979019 U CN 209979019U CN 201920950442 U CN201920950442 U CN 201920950442U CN 209979019 U CN209979019 U CN 209979019U
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Abstract
The utility model discloses a transformer oil level on-line monitoring system with temperature compensation has casing (1), vertical medium channel (2) that are equipped with in casing (1), the lower extreme of medium channel (2) is equipped with isolation diaphragm (3), packing liquid (4) and pressure sensing membrane (5) from top to bottom in proper order, is equipped with temperature sensor (6) that are used for monitoring packing liquid (4) temperature on casing (1), pressure sensing membrane (5) and temperature sensor (6) meet with control circuit. The embedded temperature sensor can monitor the oil temperature in real time and adjust the density of the transformer oil in real time according to the oil temperature, and can compensate oil level measuring errors caused by the density change of the transformer oil, so that the aim of accurately monitoring the liquid level of the transformer oil is fulfilled.
Description
Technical Field
The utility model relates to a transformer oil level on-line monitoring system, especially a can improve the transformer oil level on-line monitoring system who has temperature compensation of the monitoring degree of accuracy.
Background
The liquid level height of the transformer oil conservator needs to be monitored in the using process of the transformer. The floating ball type oil level gauge is generally used in the past, and is structurally composed of a hollow floating ball, a connecting rod, a sliding arm and the like, so that phenomena that the hollow floating ball loses buoyancy due to oil leakage, the connecting rod or the sliding wall fails due to transmission devices such as blocking and blockage and the like easily occur, false oil levels are generated, and oil level monitoring failure is caused. In order to solve the above-mentioned problems with the float-type oil level gauge, a pressure oil level gauge has been recently used. The pressure oil level gauge is characterized in that a pressure sensing membrane is installed at the bottom of an oil storage cabinet through an installation seat, a valve, a flange and the like, the pressure of an oil body causes the pressure sensing membrane to be elastically deformed to cause capacitance value change, a pressure simulation variable quantity F is measured after the pressure sensing membrane is operated and amplified by a controller, the height of an oil level is calculated through a formula h = F/rho g, rho is the density of transformer oil at normal temperature, and g is gravity acceleration. However, since the temperature of the transformer oil varies with the magnitude of the transformer coil current, the density of the transformer oil also varies with the temperature of the oil, i.e., is not constant, and thus the pressure oil level measurement error is large.
Disclosure of Invention
The utility model relates to a solve the above-mentioned technical problem that prior art exists, provide a transformer oil level on-line monitoring system with temperature compensation that can improve the monitoring degree of accuracy.
The technical solution of the utility model is that: the utility model provides a transformer oil level on-line monitoring system with temperature compensation, has the casing, the vertical medium channel that is equipped with in the casing, medium channel's lower extreme is equipped with barrier diaphragm, filling liquid and pressure sensing membrane from top to bottom in proper order, is equipped with the temperature sensor who is used for monitoring filling liquid temperature on the casing, pressure sensing membrane and temperature sensor meet with control circuit.
The utility model discloses the temperature sensor real-time supervision oil temperature of accessible embedding and according to the real-time adjustment transformer oil density of oil temperature, can compensate because of the oil level measuring error that causes because of the change of transformer oil density to reach the purpose of accurate monitoring transformer oil liquid level.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The utility model discloses a transformer oil level on-line monitoring system with temperature compensation is shown in fig. 1, has casing 1, and the vertical medium channel 2 that is equipped with in casing 1, medium channel 2's lower extreme are equipped with isolation diaphragm 3, fill liquid 4 and pressure sensing membrane 5 from top to bottom in proper order, are equipped with the temperature sensor 6 that is used for monitoring the 4 temperatures of filling liquid on casing 1, and pressure sensing membrane 5 and temperature sensor 6 meet with control circuit (singlechip etc.).
The utility model discloses the upper end is through installing in the oil conservator bottom through mount pad, valve, flange etc.. The transformer oil (PE) passes through the medium channel 2, the isolation diaphragm 3 and the filling liquid 4 to the pressure sensing membrane 5, the pressure sensing membrane 5 is elastically deformed to cause capacitance value change, and the pressure simulation variable quantity F is measured after the capacitance value change is calculated and amplified by the controller. Meanwhile, the temperature sensor 6 inputs the measured temperature value into the controller, and the controller obtains the corresponding density value rho at the temperature t according to the transformer oil density-temperature relation curvetBy the formula ht=F/ρtg calculating the height of the oil level at the moment t. The oil level measurement error caused by the density change of the transformer oil is eliminated, and the measurement data is more accurate.
Claims (1)
1. The utility model provides a transformer oil level on-line monitoring system with temperature compensation which characterized in that: there is casing (1), vertically in casing (1) be equipped with medium passageway (2), the lower extreme of medium passageway (2) is equipped with isolating diaphragm (3), filling liquid (4) and pressure sensing membrane (5) from top to bottom in proper order, is equipped with temperature sensor (6) that are used for monitoring filling liquid (4) temperature on casing (1), pressure sensing membrane (5) and temperature sensor (6) meet with control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920950442.0U CN209979019U (en) | 2019-06-24 | 2019-06-24 | Transformer oil level on-line monitoring system with temperature compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920950442.0U CN209979019U (en) | 2019-06-24 | 2019-06-24 | Transformer oil level on-line monitoring system with temperature compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209979019U true CN209979019U (en) | 2020-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201920950442.0U Active CN209979019U (en) | 2019-06-24 | 2019-06-24 | Transformer oil level on-line monitoring system with temperature compensation |
Country Status (1)
| Country | Link |
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| CN (1) | CN209979019U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113658784A (en) * | 2021-08-09 | 2021-11-16 | 南京力通达电气技术有限公司 | Intelligent oil level abnormity monitoring device and monitoring method for transformer |
-
2019
- 2019-06-24 CN CN201920950442.0U patent/CN209979019U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113658784A (en) * | 2021-08-09 | 2021-11-16 | 南京力通达电气技术有限公司 | Intelligent oil level abnormity monitoring device and monitoring method for transformer |
| CN113658784B (en) * | 2021-08-09 | 2023-09-22 | 南京力通达电气技术有限公司 | Intelligent oil level abnormality monitoring device and monitoring method for transformer |
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