CN202720283U - Power transformer winding fault simulation test system based on vibration signal diagnosis - Google Patents
Power transformer winding fault simulation test system based on vibration signal diagnosis Download PDFInfo
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- CN202720283U CN202720283U CN 201220278364 CN201220278364U CN202720283U CN 202720283 U CN202720283 U CN 202720283U CN 201220278364 CN201220278364 CN 201220278364 CN 201220278364 U CN201220278364 U CN 201220278364U CN 202720283 U CN202720283 U CN 202720283U
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Abstract
The utility model discloses a power transformer winding fault simulation test system based on vibration signal diagnosis, belonging to the field of power transformer winding fault test. In the system, a high voltage side of a general power transformer is connected to an alternating current power supply through a voltage regulator, a resistor used for limiting switch-on current is in series connection between the voltage regulator and an electric brake, a bypass knife switch is in parallel connection between two ends of the resistor, a low voltage side of the general power transformer is connected with a low voltage side of a tested general power transformer which is provided with a winding fault, a high voltage side of the tested power transformer is short circuited, a vibration sensor is arranged at a surface of a tested power transformer oil tank, a current sensor is arranged on a conducting wire between the two transformers, through adjusting the voltage regulator, the tested transformer obtains needed different test current such that the vibration sensor and the current sensor obtain different signals, and then the signals are processed and analyzed by a computer. The power transformer winding fault simulation test system has the advantages of easy realization, safe operation, and high economy.
Description
Technical field
The utility model relates to a kind of Winding in Power Transformer fault simulating test system based on the vibration signal diagnosis, belongs to Winding in Power Transformer Test to Failure field.
Background technology
The stability of power transformer and reliability greatly affect the safe operation of whole electrical network, and therefore, the research tool of carrying out deformation of transformer winding detection and fault diagnosis is of great significance.
During power transformer stable operation, the magnetostriction of siliconized plate has caused iron coring vibration, winding produces vibration under the electric field force effect of load current, winding and vibration unshakable in one's determination are delivered to the fuel tank of transformer by transformer body and oil, cause the vibration of fuel tank, compression situation, displacement and the deformation state of the vibration on oil tank of transformer surface and Transformer Winding and iron core are closely related.But when power transformer was applied low voltage, the vibration on the oil tank of transformer surface that is caused by iron core was very little, can be similar to and ignore, and can think that the vibration of power transformer mainly is to be caused by winding.Therefore, be necessary by the transformer winding fault simulation test further seek winding failure and the vibration between relation.
The load test of existing simulation electric power transformer winding fault implements and has following problem:
If 1 adopts the direct bringing onto load of power transformer, need larger load current, not only the common laboratory power supply capacity does not allow, and need to purchase very large load device, and capital consumption is large, and also can waste a large amount of electric energy at the trial.
2, with the low-pressure side short circuit of power transformer, and the high-pressure side adds low-voltage by pressure regulator, can realize in theory, but because the needs load current is very large, and to require adjustable (be 144.3A such as the S9-M-100/10 transformer; The S11-M-200/10 transformer is 288.7A), if with pressure regulator directly and power supply join, then can export very large electric current, this will require pressure regulator very high, and general pressure regulator can't satisfy so high requirement in the laboratory, in addition, if add higher voltage on the transformer, the vibration that iron core causes can exert an influence to the research winding failure.
The utility model content
The deficiency that the utility model exists for prior art, and a kind of Winding in Power Transformer fault simulating test system based on the vibration signal diagnosis is proposed, to reduce the test threshold, improve test effect.
This Winding in Power Transformer fault simulating test system comprises resistance, pressure regulator, the universal electric power transformer, tested power transformer, vibration transducer and current sensor, wherein: the high-pressure side of universal electric power transformer connects AC power by pressure regulator, resistance string is associated between pressure regulator and the power supply plug-in strip, bypass plug-in strip in parallel also at the two ends of resistance, the low-pressure side of universal electric power transformer and the low-pressure side of tested power transformer are joined, the high-pressure side short circuit of tested power transformer, vibration transducer is located at the tank surface of tested power transformer, and current sensor is located on the wire between universal electric power transformer and the tested power transformer.
Technique effect:
1, can accurately monitor winding failure in the limited situation of power supply capacity, system is simple to operate, and parameter easily measures, and the transformer of same type is had ubiquity.
2, in the situation that power supply capacity allows, can reduce the demand to power supply, system's handling safety, economy is high, and exploitativeness is strong.
3, the voltage of tested power transformer high and low pressure side is all very low in the system, can reduce the impact that core vibration produces, and is conducive to improve the test accuracy.
Description of drawings
Fig. 1 is the hardware circuit principle figure of the utility model system.
Fig. 2 is that the integral body of the utility model system realizes the equivalent structure synoptic diagram.
Embodiment
Below the utility model is described in further detail.
The hardware that the utility model adopts is as follows:
Resistance, effect: the excitation surge current that the restriction power supply produces when closing a floodgate is on the impact (common laboratory does not possess the power supply capacity that can bear the power transformer idle-loaded switching-on) of power supply, after power supply closes a floodgate very soon with this resistance short circuit (closing a floodgate rear 0.5 second in).
Pressure regulator, effect: regulate the voltage of universal electric power high voltage side of transformer, make tested power transformer obtain the required different load current of test.
The universal electric power transformer, effect: further step-down, the size of load current is met the demands (the load current size should be suitable with the rated current of tested transformer), make simultaneously the former and deputy polygonal voltage of tested transformer all very low, to reduce iron core to the impact of winding fault simulating test.
Tested power transformer, effect: winding failure is set, and vibrates to obtain required test figure by monitoring it.
Vibration transducer, effect: the vibration signal that gathers tested power transformer fuel tank surface.
Current sensor, effect: the current signal of measuring the tested transformer loads of reflection.
The circuit connecting relation of above-mentioned hardware as shown in Figure 1, universal electric power transformer TR
2The high-pressure side by pressure regulator TR
1Connect AC power (laboratory is generally 380V), resistance R is connected on pressure regulator TR
1With power supply plug-in strip K
1Between, bypass plug-in strip K in parallel also at the two ends of this resistance R
2, universal electric power transformer TR
2Low-pressure side and tested power transformer TR
3Low-pressure side join tested power transformer TR
3The high-pressure side short circuit.Can make the output voltage of pressure regulator higher like this, output current I
2Less, to reduce the requirement to pressure regulator.Further reduce voltage by the universal electric power transformer, can obtain required than large load current I
3, supply with at last tested transformer.
As shown in Figure 1, vibration transducer VS is installed in tested transformer TR
3Tank surface, current sensor IS are installed on universal electric power transformer TR
2With tested power transformer TR
3Between wire on.When beginning to test, first with bypass plug-in strip separating brake, the power supply plug-in strip is closed a floodgate, then immediately the bypass plug-in strip is closed a floodgate (short circuit resistance), by regulating pressure regulator, can make tested power transformer obtain required different tests electric current, make simultaneously the former and deputy polygonal voltage of tested power transformer all lower, obtain different vibration signal and current signal by vibration transducer from current sensor at last.Signal data that vibration transducer and current sensor measure reaches that computing machine is stored, data are processed after through the Nicolet data collecting instrument and analyzes, and whole equivalent structure as shown in Figure 2.Be the vibration state on comprehensive monitoring power transformer surface, vibration transducer is installed in respectively the position corresponding with winding three-phase, transformer-cabinet top, with the vibration signal of monitoring transformer-cabinet Surface Vertical direction.
The below provides an embodiment of the present utility model:
Select the power transformer S9-M-100/10 of Jiangsu Hong Yuan electric corporation production as tested power transformer, and carry out the setting of winding deformation fault; Select the new power transformer S11-M-200/10 of Jiangsu Hong Yuan electric corporation production as the universal electric power transformer; It is resistance about 4 ohm that resistance is selected resistance; Vibration transducer adopts vibration acceleration sensor CA-YD-103; Current sensor adopts BJHCS-ES5A-75A.
The winding deformation fault is set: with crane with the transformer suspended core, can see the iron core and the winding that are immersed in the transformer oil, two cushion blocks on one phase winding top are taken out, utilize bamboo chip to insert gently winding wire cake gap, winding is fluffed, then use mallet to knock bamboo chip, cause the radial distortion of winding wire cake.
Use the utility model and test, by regulating pressure regulator to regulate the voltage of universal electric power high voltage side of transformer, make tested power transformer obtain the required different loads electric current (test current) of test, test figure is as shown in table 1.
Table 1
| TR 2High side voltage (V) | Load current I 3（A） |
| 320 | 115.92 |
| 340 | 123.10 |
| 360 | 129.72 |
| 380 | 137.51 |
| 398 | 144.27 |
Use pressure regulator that the universal electric power high voltage side of transformer is carried out pressure regulation, utilize current sensor to measure the size of load current.As can be seen from Table 1, the voltage of universal electric power high voltage side of transformer is heightened gradually, finally can be made load current move closer to rated current.This has reduced the requirement to pressure regulator, realizes that in the laboratory power supply capacity effectively reduces easily.
After carrying out a large amount of measured tests, the basis of theory analysis finds that native system has good operability and practicality, can be specifically designed to the research to the Winding in Power Transformer fault diagnosis.
Claims (1)
1. the Winding in Power Transformer fault simulating test system based on the vibration signal diagnosis is characterized in that: comprise resistance (R), pressure regulator (TR
1), universal electric power transformer (TR
2), tested power transformer (TR
3), vibration transducer (VS) and current sensor (IS), wherein: universal electric power transformer (TR
2) the high-pressure side by pressure regulator (TR
1) connecting AC power, resistance (R) is connected on pressure regulator (TR
1) and power supply plug-in strip (K
1) between, bypass plug-in strip (K in parallel also at the two ends of resistance (R)
2), universal electric power transformer (TR
2) low-pressure side and tested power transformer (TR
3) low-pressure side join tested power transformer (TR
3) the high-pressure side short circuit, vibration transducer (VS) is located at tested power transformer (TR
3) tank surface, current sensor (IS) is located at universal electric power transformer (TR
2) and tested power transformer (TR
3) between wire on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278364 CN202720283U (en) | 2012-06-13 | 2012-06-13 | Power transformer winding fault simulation test system based on vibration signal diagnosis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278364 CN202720283U (en) | 2012-06-13 | 2012-06-13 | Power transformer winding fault simulation test system based on vibration signal diagnosis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202720283U true CN202720283U (en) | 2013-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220278364 Expired - Fee Related CN202720283U (en) | 2012-06-13 | 2012-06-13 | Power transformer winding fault simulation test system based on vibration signal diagnosis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202720283U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547367A (en) * | 2016-01-11 | 2016-05-04 | 江苏省电力公司淮安供电公司 | High-voltage isolation switch vibration state monitoring system |
| CN106952182A (en) * | 2017-03-24 | 2017-07-14 | 广东电网有限责任公司电力科学研究院 | A kind of Winding in Power Transformer method for diagnosing faults based on vibration distribution feature |
| CN107591072A (en) * | 2017-10-09 | 2018-01-16 | 贵州电网有限责任公司 | A kind of Synthesized Diagnosis On Transformer Faults simulator and its emulation mode |
| CN108572293A (en) * | 2018-04-25 | 2018-09-25 | 广州供电局有限公司 | Transformer fault Diagnosis On Hidden Troubles method and apparatus |
| CN114113982A (en) * | 2021-11-24 | 2022-03-01 | 上海明华电力科技有限公司 | Fault identification method based on transformer vibration signal |
-
2012
- 2012-06-13 CN CN 201220278364 patent/CN202720283U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547367A (en) * | 2016-01-11 | 2016-05-04 | 江苏省电力公司淮安供电公司 | High-voltage isolation switch vibration state monitoring system |
| CN105547367B (en) * | 2016-01-11 | 2017-07-21 | 江苏省电力公司淮安供电公司 | A kind of high voltage isolator Vibration Condition Monitoring system |
| CN106952182A (en) * | 2017-03-24 | 2017-07-14 | 广东电网有限责任公司电力科学研究院 | A kind of Winding in Power Transformer method for diagnosing faults based on vibration distribution feature |
| CN107591072A (en) * | 2017-10-09 | 2018-01-16 | 贵州电网有限责任公司 | A kind of Synthesized Diagnosis On Transformer Faults simulator and its emulation mode |
| CN107591072B (en) * | 2017-10-09 | 2023-08-25 | 贵州电网有限责任公司 | Transformer comprehensive fault diagnosis simulation device and simulation method thereof |
| CN108572293A (en) * | 2018-04-25 | 2018-09-25 | 广州供电局有限公司 | Transformer fault Diagnosis On Hidden Troubles method and apparatus |
| CN114113982A (en) * | 2021-11-24 | 2022-03-01 | 上海明华电力科技有限公司 | Fault identification method based on transformer vibration signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HEHAI UNIV. STATE ELECTRIC NET CROP. JIANGSU ELECT Free format text: FORMER OWNER: HEHAI UNIV. Effective date: 20130110 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130110 Address after: The Olympic Avenue in Jianye District of Nanjing city of Jiangsu Province, No. 1 210019 Patentee after: JIANGSU NANJING POWER SUPPLY Co. Patentee after: HOHAI University Patentee after: State Grid Corporation of China Patentee after: JIANGSU ELECTRIC POWER Co. Address before: The Olympic Avenue in Jianye District of Nanjing city of Jiangsu Province, No. 1 210019 Patentee before: JIANGSU NANJING POWER SUPPLY Co. Patentee before: HOHAI University |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20180613 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |