CN108461257B - Oil supplementing device for transformer - Google Patents
Oil supplementing device for transformer Download PDFInfo
- Publication number
- CN108461257B CN108461257B CN201810043038.5A CN201810043038A CN108461257B CN 108461257 B CN108461257 B CN 108461257B CN 201810043038 A CN201810043038 A CN 201810043038A CN 108461257 B CN108461257 B CN 108461257B
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- CN
- China
- Prior art keywords
- oil
- oil pump
- transformer
- pipe
- variable frequency
- Prior art date
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- 230000001502 supplementing effect Effects 0.000 title claims abstract description 46
- 238000007789 sealing Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 17
- 230000001960 triggered effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention provides an oil supplementing device for a transformer, which belongs to the field of oil supplementing devices, and comprises: the oil pump is connected with an alternating frequency motor, an electronic flowmeter is arranged at the position of oil discharged by the oil pump, the electronic flowmeter is connected with a variable frequency controller, and the variable frequency controller is connected with the alternating frequency motor; the electronic flowmeter monitors the oil flow discharged by the oil pump in real time, transmits the detected flow value to the variable frequency controller, acquires a motor driving signal corresponding to the flow value at the variable frequency controller, and enables the cross-frequency motor to drive the oil pump to rotate according to the motor driving signal so as to realize feedback compensation of the oil flow. The oil supplementing device always controls the rotation speed of the oil pump according to the driving motor signal corresponding to the flow value in the oil supplementing process, and the rotation speed of the oil pump is the oil supplementing speed of the transformer, so that the oil supplementing speed of the transformer is controlled, and the condition that a large number of bubbles are generated due to the fact that oil flow is impacted excessively fast due to the fact that the oil supplementing speed is too fast, and gas alarm is triggered is avoided.
Description
Technical Field
The invention belongs to the field of oil supplementing devices, and particularly relates to an oil supplementing device for a transformer.
Background
The oil supplementing method of the transformer is mainly an oil injection and exhaust method, an air inflation and exhaust method and an air extraction and exhaust method, and the common characteristics of the three methods are that the oil supplementing speed of the transformer cannot be controlled in the oil supplementing process.
The most widely adopted oil supplementing method at present is an oil injection and exhaust method, and the method is characterized in that exhaust is sufficient, and a large number of bubbles are easy to generate because the oil supplementing speed of the transformer cannot be controlled in the oil supplementing process, so that gas alarm is triggered.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides an oil supplementing device which is used for controlling the oil supplementing speed of a transformer in the oil supplementing process.
In order to achieve the above technical object, the present invention provides an oil compensating device for a transformer, the oil compensating device comprising:
the oil pump is used for conveying oil to the transformer, the driving shaft of the oil pump is connected with an alternating frequency motor for controlling the rotating speed of the oil pump, an electronic flowmeter is arranged at the position of oil discharged from the oil pump, the output end of the electronic flowmeter is connected with a variable frequency controller, and the output end of the variable frequency controller is connected with the alternating frequency motor;
the electronic flowmeter monitors the oil flow discharged by the oil pump in real time, transmits the detected flow value to the variable frequency controller, acquires a motor driving signal corresponding to the flow value at the variable frequency controller, and enables the cross-frequency motor to drive the oil pump to rotate according to the motor driving signal so as to realize feedback compensation of the oil flow.
Optionally, the oil supplementing device further comprises a filter, wherein the filter comprises a filter element, the filter is provided with a first oil guide pipe and a second oil guide pipe, and the oil pump is provided with an ingress pipe connected with the first oil guide pipe and an egress pipe connected with the second oil guide pipe.
Optionally, the oil pump is further provided with an oil outlet pipe for discharging oil and an oil inlet pipe for sucking oil.
Optionally, an overflow valve is arranged between the oil inlet pipe and the oil outlet pipe.
Optionally, the oil inlet pipe is provided with an oil inlet valve, the oil outlet pipe is provided with an oil outlet valve, the oil inlet valve is provided with a first sealing cover, and the oil outlet valve is provided with a second sealing cover.
The technical scheme provided by the invention has the beneficial effects that:
the oil supplementing device always controls the rotation speed of the oil pump according to the driving motor signal corresponding to the flow value in the oil supplementing process, and the rotation speed of the oil pump is the oil supplementing speed of the transformer, so that the oil supplementing speed of the transformer is controlled, and the condition that a large number of bubbles are generated due to the fact that oil flow is impacted excessively fast due to the fact that the oil supplementing speed is too fast, and gas alarm is triggered is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a first oil compensating device for a transformer according to the present invention;
fig. 2 is a schematic diagram of a second structure of the oil compensating device for a transformer according to the present invention.
Detailed Description
In order to make the structure and advantages of the present invention more apparent, the structure of the present invention will be further described with reference to the accompanying drawings.
Example 1
The invention provides an oil supplementing device for a transformer, which comprises:
the oil pump is used for conveying oil to the transformer, the driving shaft of the oil pump is connected with an alternating frequency motor for controlling the rotating speed of the oil pump, an electronic flowmeter is arranged at the position of oil discharged from the oil pump, the output end of the electronic flowmeter is connected with a variable frequency controller, and the output end of the variable frequency controller is connected with the alternating frequency motor;
the electronic flowmeter monitors the oil flow discharged by the oil pump in real time, transmits the detected flow value to the variable frequency controller, acquires a motor driving signal corresponding to the flow value at the variable frequency controller, and enables the cross-frequency motor to drive the oil pump to rotate according to the motor driving signal so as to realize feedback compensation of the oil flow.
In implementation, as shown in fig. 1, the oil supplementing device comprises a variable frequency controller, an electronic flowmeter, an alternating frequency motor and an oil pump, wherein the variable frequency controller is a controller capable of realizing the functions of starting, stopping, accelerating, decelerating, forward and reverse rotation and the like of the alternating frequency motor.
The working principle of the oil supplementing device is as follows: when the transformer is replenished with oil, the electronic flowmeter monitors the oil flow discharged by the oil pump in real time, and transmits the monitored flow value to the variable frequency controller, the variable frequency controller acquires a motor driving signal corresponding to the flow value, the variable frequency controller transmits the motor driving signal to the alternating frequency motor, and the alternating frequency motor drives the oil pump to rotate according to the motor driving signal, so that feedback compensation of the oil flow is realized; when the variable frequency controller cannot acquire a motor driving signal corresponding to the flow value according to the received flow value, the cross-frequency motor stops driving the oil pump to rotate. The oil supplementing process is performed on the transformer by controlling the rotating speed of the oil pump, so that the condition that a large number of bubbles are generated due to the overlarge impact of oil flow to trigger gas alarm cannot occur in the oil supplementing process.
Based on the oil supplementing device, the rotating speed of the oil pump is controlled according to the driving motor signal corresponding to the flow value in the oil supplementing process all the time, and the rotating speed of the oil pump is controlled to be equal to the oil supplementing speed of the control transformer, so that the oil supplementing speed of the control transformer is realized, and the condition that a large number of bubbles are generated due to the fact that the oil flow is impacted excessively fast to trigger a gas alarm is avoided.
Optionally, the oil supplementing device further comprises a filter, wherein the filter comprises a filter element, the filter is provided with a first oil guide pipe and a second oil guide pipe, and the oil pump is provided with an ingress pipe connected with the first oil guide pipe and an egress pipe connected with the second oil guide pipe.
In implementation, as shown in fig. 2, the oil supplementing device further comprises a filter, wherein the filter comprises a filter core for filtering and purifying oil, a first oil guide pipe and a second oil guide pipe are arranged on the filter, and an ingress pipe connected with the first oil guide pipe and an egress pipe connected with the second oil guide pipe are arranged on the oil pump. When the oil flows into the first oil guide pipe from the inlet pipe of the oil pump, the oil enters the filter element of the filter screen with certain specification for filtering, and the filtered oil flows out of the filter element and flows into the outlet pipe of the oil pump through the second oil guide pipe. The contaminated oil reaches a certain cleanliness after being filtered based on the filter core in the filter, so that the quality of the oil can be ensured.
Optionally, the oil pump is further provided with an oil outlet pipe for discharging oil and an oil inlet pipe for sucking oil.
In implementation, as shown in fig. 2, the oil pump is further provided with an oil outlet pipe and an oil inlet pipe, the oil outlet pipe is connected with an oil filling valve at the lower part of the transformer through a through pipe, and the oil inlet pipe is connected with an oil outlet of the oil storage cabinet through another through pipe. The oil pump sucks the oil of the oil storage cabinet up through the oil inlet pipe, the oil enters the filter element through the ingress pipe and the first oil guide pipe to be filtered, the filtered oil flows to the oil outlet pipe through the second oil guide pipe and the egress pipe, and flows into the oiling valve at the lower part of the transformer through the oil outlet pipe, so that the purpose of supplementing the oil to the transformer is achieved, therefore, workers do not need to climb to the upper end of the transformer to supplement the oil to the transformer, the oil supplementing time of the transformer is effectively shortened, and the working efficiency is improved.
Optionally, an overflow valve is arranged between the oil inlet pipe and the oil outlet pipe.
In practice, as shown in fig. 2, an overflow valve, also called a hydraulic pressure control valve, is arranged between the oil inlet pipe and the oil outlet pipe, and can effectively control the oil quantity entering the oil pump from the oil inlet pipe, thereby playing a role in preventing the oil quantity from overflowing.
Optionally, the oil inlet pipe is provided with an oil inlet valve, the oil outlet pipe is provided with an oil outlet valve, the oil inlet valve is provided with a first sealing cover, and the oil outlet valve is provided with a second sealing cover.
In practice, as shown in fig. 2, an oil inlet valve is arranged on an oil inlet pipe, a first sealing cover is arranged on the oil inlet valve, an oil outlet valve with good sealing performance is arranged on an oil outlet pipe, a second sealing cover with good sealing performance is arranged on the oil outlet valve, and the first sealing cover and the second sealing cover both play a role in preventing oil leakage, so that the problem of environmental pollution caused by oil leakage is solved, and the treatment cost of the environment is reduced.
The invention provides an oil supplementing device for a transformer, which comprises: the oil pump is connected with an alternating frequency motor, an electronic flowmeter is arranged at the position of oil discharged by the oil pump, the electronic flowmeter is connected with a variable frequency controller, and the variable frequency controller is connected with the alternating frequency motor; the electronic flowmeter monitors the oil flow discharged by the oil pump in real time, transmits the detected flow value to the variable frequency controller, acquires a motor driving signal corresponding to the flow value at the variable frequency controller, and enables the cross-frequency motor to drive the oil pump to rotate according to the motor driving signal so as to realize feedback compensation of the oil flow. The oil supplementing device always controls the rotation speed of the oil pump according to the driving motor signal corresponding to the flow value in the oil supplementing process, and the rotation speed of the oil pump is the oil supplementing speed of the transformer, so that the oil supplementing speed of the transformer is controlled, and the condition that a large number of bubbles are generated due to the fact that oil flow is impacted excessively fast due to the fact that the oil supplementing speed is too fast, and gas alarm is triggered is avoided.
The various numbers in the above embodiments are for illustration only and do not represent the order of assembly or use of the various components.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather, the present invention is to be construed as limited to the appended claims.
Claims (1)
1. An oil compensating device for a transformer, the oil compensating device comprising:
the oil pump is used for conveying oil to the transformer, the driving shaft of the oil pump is connected with an alternating frequency motor for controlling the rotating speed of the oil pump, an electronic flowmeter is arranged at the position of oil discharged from the oil pump, the output end of the electronic flowmeter is connected with a variable frequency controller, and the output end of the variable frequency controller is connected with the alternating frequency motor;
the electronic flowmeter monitors the oil flow discharged by the oil pump in real time, transmits the detected flow value to the variable frequency controller, acquires a motor driving signal corresponding to the flow value at the variable frequency controller, and enables the cross-frequency motor to drive the oil pump to rotate according to the motor driving signal so as to realize feedback compensation of the oil flow;
the oil supplementing device further comprises a filter, wherein the filter comprises a filter element, a first oil guide pipe and a second oil guide pipe are arranged on the filter, and an ingress pipe connected with the first oil guide pipe and an egress pipe connected with the second oil guide pipe are arranged on the oil pump;
the oil pump is also provided with an oil outlet pipe for discharging oil and an oil inlet pipe for sucking the oil;
an overflow valve is arranged between the oil inlet pipe and the oil outlet pipe;
the oil inlet pipe is provided with an oil inlet valve, the oil outlet pipe is provided with an oil outlet valve, the oil inlet valve is provided with a first sealing cover, and the oil outlet valve is provided with a second sealing cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810043038.5A CN108461257B (en) | 2018-01-17 | 2018-01-17 | Oil supplementing device for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810043038.5A CN108461257B (en) | 2018-01-17 | 2018-01-17 | Oil supplementing device for transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108461257A CN108461257A (en) | 2018-08-28 |
| CN108461257B true CN108461257B (en) | 2024-04-09 |
Family
ID=63220277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810043038.5A Active CN108461257B (en) | 2018-01-17 | 2018-01-17 | Oil supplementing device for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108461257B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112113622A (en) * | 2020-10-14 | 2020-12-22 | 广州机械科学研究院有限公司 | Oil flow monitoring device and method |
| CN114898978A (en) * | 2022-04-18 | 2022-08-12 | 广东电网有限责任公司广州供电局 | Vegetable oil transformer and safe operation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5691408A (en) * | 1979-12-26 | 1981-07-24 | Fuji Electric Co Ltd | Simple oil replenishment to appliance |
| CN101235836A (en) * | 2008-03-05 | 2008-08-06 | 陈岩 | Pump control type electrohydraulic actuator |
| KR20120112315A (en) * | 2012-08-30 | 2012-10-11 | 이우성 | System for apparatus of control a flood disaster using potential energy of water |
| CN103440962A (en) * | 2013-08-01 | 2013-12-11 | 国家电网公司 | Intelligent on-line oil filling vehicle for transformer and oil filling method |
| DE202015100035U1 (en) * | 2015-01-07 | 2015-02-10 | Xinyu Liu | Warranty device of the lubricating oil of the vehicle engine |
| CN104575961A (en) * | 2015-01-06 | 2015-04-29 | 国家电网公司 | Main transformer on-load switch online intelligent oil supply device and use method thereof |
| CN206574575U (en) * | 2017-01-11 | 2017-10-20 | 南京立业电力变压器有限公司 | A kind of transformer compensates oil pressure constant-voltage equipment with air pressure automatically |
| CN107477051A (en) * | 2017-09-15 | 2017-12-15 | 太原理工大学 | The electric-hydraulic combined double actuator systems of back pressure regulation and control of load variations oil |
| CN207993623U (en) * | 2018-01-17 | 2018-10-19 | 国网浙江宁波市鄞州区供电有限公司 | The recharging oil device of for transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9959966B2 (en) * | 2016-06-01 | 2018-05-01 | Fortune Electric Co., Ltd. | Cooling fan variable-frequency control system for a power transformer |
-
2018
- 2018-01-17 CN CN201810043038.5A patent/CN108461257B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5691408A (en) * | 1979-12-26 | 1981-07-24 | Fuji Electric Co Ltd | Simple oil replenishment to appliance |
| CN101235836A (en) * | 2008-03-05 | 2008-08-06 | 陈岩 | Pump control type electrohydraulic actuator |
| KR20120112315A (en) * | 2012-08-30 | 2012-10-11 | 이우성 | System for apparatus of control a flood disaster using potential energy of water |
| CN103440962A (en) * | 2013-08-01 | 2013-12-11 | 国家电网公司 | Intelligent on-line oil filling vehicle for transformer and oil filling method |
| CN104575961A (en) * | 2015-01-06 | 2015-04-29 | 国家电网公司 | Main transformer on-load switch online intelligent oil supply device and use method thereof |
| DE202015100035U1 (en) * | 2015-01-07 | 2015-02-10 | Xinyu Liu | Warranty device of the lubricating oil of the vehicle engine |
| CN206574575U (en) * | 2017-01-11 | 2017-10-20 | 南京立业电力变压器有限公司 | A kind of transformer compensates oil pressure constant-voltage equipment with air pressure automatically |
| CN107477051A (en) * | 2017-09-15 | 2017-12-15 | 太原理工大学 | The electric-hydraulic combined double actuator systems of back pressure regulation and control of load variations oil |
| CN207993623U (en) * | 2018-01-17 | 2018-10-19 | 国网浙江宁波市鄞州区供电有限公司 | The recharging oil device of for transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108461257A (en) | 2018-08-28 |
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