CN102269786B - Load testing device for triple-frequency transformer - Google Patents
Load testing device for triple-frequency transformer Download PDFInfo
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- CN102269786B CN102269786B CN201110118200.3A CN201110118200A CN102269786B CN 102269786 B CN102269786 B CN 102269786B CN 201110118200 A CN201110118200 A CN 201110118200A CN 102269786 B CN102269786 B CN 102269786B
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- 238000002474 experimental method Methods 0.000 claims description 8
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Abstract
The invention relates to a load testing device for a transformer, which is mainly applied in testing items of the transformer delivery, handover, overhaul and failure and can determine short-circuit impedance and load loss, provide important parameters for identifying the quality, the performances and the operation conditions of the transformer and provide the basic parameters for a temperature rise test of the transformer. The structure is as follows: the voltage of a triple-frequency power supply is loaded to the tested transformer through a voltage regulator and an intermediate transformer, a compensator is connected behind the intermediate transformer in parallel, a voltmeter, an ammeter, a power meter and a frequency meter are connected on the primary side of the tested transformer, and the secondary side of the tested transformer is in short circuit. When a short-circuit test is performed on the tested transformer under the conditions of the triple-frequency power supply, the obtained test data are converted to the corresponding value under a power frequency voltage through data fitting treatment and the test effects which are equivalent to those under the power frequency voltage can be realized. The required power supply capacity is small, the volume of a compensation condenser is small, the testing site is small, the wiring and the monitoring are convenient, and 50% Ie testing requirements can be met.
Description
Technical field
The present invention relates to a kind of load testing apparatus, relate in particular to a kind of load testing device for triple-frequency transformer, belong to electric power application, be applied to that power transformer dispatches from the factory, the load testing apparatus after handing-over, overhaul and fault.
Background technology
According to GB requirement, under power frequency condition, carry out transformer load test, test current should reach 50%～100%Ie.Because scene is difficult to meet the needed large capacity power source of test, be about 10% left and right of test specimen rated capacity, the load test of electric company can only be 10%Ie and following carrying out at present.Even if adopt Parallel-connected Capacitor compensation way, when experiment power supply capacity reaches 100kVA, also can only carry out the 50%Ie load test of 66kV and following electric pressure transformer, but required compensation condenser capacity is very large, 50 about μ F, generally need tens, the capacitor of weight 50kg left and right, electric capacity 8 μ F, in addition jumbo pressure regulator and intermediate transformer, the difficulty such as cause that transportation, carrying, wiring and scene are put, and measurements and calculations error is also very large.
How can be under the capacity conditions of small electric source, it is convenient, fast and accurate that to carry out transformer load test be current engineering technology problem urgently to be resolved hurrily.
Summary of the invention
Patent of the present invention is for the problems referred to above, proposition utilizes 3 frequency multiplication generators as experiment power supply, by low capacity compensator, realizes the transformer load test unit that electric current reaches 50% Ie, solved in prior art and cannot, under small power supply capacity conditions, carry out the problem of transformer load test.
Technical scheme of the present invention is as follows:
3 frequency multiplication generators are as experiment power supply, 3 frequency multiplication generators are loaded on tested transformer by pressure regulator, intermediate transformer, compensator is connected in parallel between intermediate transformer and tested transformer, voltage table, reometer, power meter, frequency meter are all connected to tested transformer primary side, and tested transformer is paid limit short circuit.
Between 3 described frequency multiplication generators and pressure regulator, be parallel with control box.
Described pressure regulator is any in electric voltage regulator or manual voltage regulator.
Described compensator is inductor or capacitor.
Advantageous effect of the present invention is as follows:
1, adopt 3 frequency multiplication generators as experiment power supply, rig-site utilization is strong, test current can reach 50%Ie and more than.
2, compensation capacity is about 1/9,100 experiment power supply capacity of compensation capacity under power frequency condition; All reduce greatly compensator volume, weight and required test site etc.
3, test connection is convenient, and working site is easy to safety custody, saves human and material resources.
4, test current significantly improves, and test figure is accurate, and test findings has more using value.
5, by the present invention under small power supply capacity conditions, can carry out transformer load test, measure short-circuit impedance and the load loss of transformer, for identifying that transformer quality, performance service condition and temperature rise test provide important parameter.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is wiring diagram of the present invention.
In figure, T1-frequency tripling generator; T2-pressure regulator; T3-intermediate transformer; The tested transformer of T4-; Hz-hertz table; A-reometer; W-power meter; V-voltage table; 1, control box, 2, compensator.
Embodiment
Below in conjunction with accompanying drawing, in conjunction with specific embodiments, describe the present invention as follows.
embodiment 1
3 frequency multiplication generators, as experiment power supply, are parallel with control box between 3 frequency multiplication generators and pressure regulator; 3 frequency multiplication generators are loaded on tested transformer by electric voltage regulator, intermediate transformer, capacitive compensator is connected in parallel between intermediate transformer and tested transformer, voltage table, reometer, power meter, frequency meter are connected to tested transformer primary side, and tested transformer is paid limit short circuit.
Described pressure regulator is manual voltage regulator, and compensator is inductance compensation device, and other structure is with embodiment 1.
Technical indicator of the present invention is as follows:
1,3 frequency multiplication generator-capacity 100kVA, frequency 150Hz, voltage 380kV;
2, capacitive compensator-many taps electric capacity;
3, inductance compensation device-many tap inductors;
4,50%～100%Ie of test current-test specimen rated current;
5, environment temperature--5～30
0c;
6, ambient humidity-50%-80%.
Principle of work of the present invention and process are as follows:
Utilize 3 frequency multiplication generators to obtain the single-phase experiment power supply of 150Hz, by in tested transformer access test circuit, select inductance or electric capacity as reactive-load compensator, tested transformer is paid limit short circuit, as shown in Figure 2, measure original edge voltage, electric current, power, frequency, obtain short-circuit impedance and load loss data, carry out again the corrected Calculation such as electric current, temperature, frequency, obtain short-circuit impedance and load loss value under power frequency condition.
Claims (1)
1. load testing device for triple-frequency transformer, it is characterized in that 3 frequency multiplication generators are as experiment power supply, 3 frequency multiplication generators are loaded on tested transformer by pressure regulator, intermediate transformer, compensator is connected in parallel between intermediate transformer and tested transformer, voltage table, reometer, power meter, frequency meter are all connected to tested transformer primary side, and tested transformer is paid limit short circuit; Between 3 described frequency multiplication generators and pressure regulator, be parallel with control box; Described compensator is inductance compensation device or capacitive compensator; Described pressure regulator is any in electric voltage regulator or manual voltage regulator;
The technical indicator of described test unit is: described 3 frequency multiplication generators---capacity 100kVA, frequency 150Hz, voltage 380kV; Described capacitive compensator---many taps electric capacity; Described inductance compensation device---many tap inductors; Test current---the 50%-100%Ie of test specimen rated current; Environment temperature----5-30 ℃; Ambient humidity---50%-80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110118200.3A CN102269786B (en) | 2011-05-09 | 2011-05-09 | Load testing device for triple-frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110118200.3A CN102269786B (en) | 2011-05-09 | 2011-05-09 | Load testing device for triple-frequency transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102269786A CN102269786A (en) | 2011-12-07 |
| CN102269786B true CN102269786B (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110118200.3A Active CN102269786B (en) | 2011-05-09 | 2011-05-09 | Load testing device for triple-frequency transformer |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841257B (en) * | 2012-09-10 | 2015-10-07 | 江苏省电力公司苏州供电公司 | For testing the instrument of transformer single-phase short circuit impedance |
| CZ305577B6 (en) * | 2014-11-28 | 2015-12-16 | České Vysoké Učení Technické V Praze Fakulta Elektrotechnická | Device to test control transformers |
| CN105807172A (en) * | 2016-06-01 | 2016-07-27 | 国家电网公司 | Ultrahigh voltage substation simulated operation verifying system |
| CN109917214B (en) * | 2019-04-11 | 2024-02-06 | 孟庆安 | Automatic control system for capacitance compensation in temperature rise test of transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2733371Y (en) * | 2004-08-23 | 2005-10-12 | 特变电工股份有限公司 | An apparatus for testing transformer |
| CN101718804A (en) * | 2009-12-04 | 2010-06-02 | 中国电力科学研究院 | Power supply system of partial discharge test used for extra-high voltage transformer |
| CN201576074U (en) * | 2009-12-18 | 2010-09-08 | 国网电力科学研究院武汉南瑞有限责任公司 | Variable frequency resonance tester without partial discharge for ultrahigh voltage transformer |
| CN202041606U (en) * | 2011-05-09 | 2011-11-16 | 辽宁省电力有限公司抚顺供电公司 | Frequency tripling transformer load test device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2985437B2 (en) * | 1991-11-13 | 1999-11-29 | 株式会社明電舎 | Test method and circuit for ground fault directional relay |
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2011
- 2011-05-09 CN CN201110118200.3A patent/CN102269786B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2733371Y (en) * | 2004-08-23 | 2005-10-12 | 特变电工股份有限公司 | An apparatus for testing transformer |
| CN101718804A (en) * | 2009-12-04 | 2010-06-02 | 中国电力科学研究院 | Power supply system of partial discharge test used for extra-high voltage transformer |
| CN201576074U (en) * | 2009-12-18 | 2010-09-08 | 国网电力科学研究院武汉南瑞有限责任公司 | Variable frequency resonance tester without partial discharge for ultrahigh voltage transformer |
| CN202041606U (en) * | 2011-05-09 | 2011-11-16 | 辽宁省电力有限公司抚顺供电公司 | Frequency tripling transformer load test device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平5-137239A 1993.06.01 |
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Owner name: STATE ELECTRIC NET CROP. Effective date: 20120919 |
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Effective date of registration: 20120919 Address after: 113008 West Xinfu Road, Liaoning, Fushun, No. 13 Applicant after: Fushun Power Supply Company of Liaoning Electric Power Co., Ltd. Applicant after: State Grid Corporation of China Address before: 113008 West Xinfu Road, Liaoning, Fushun, No. 13 Applicant before: Fushun Power Supply Company of Liaoning Electric Power Co., Ltd. |
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