CN102269786A - Load testing device for triple-frequency transformer - Google Patents
Load testing device for triple-frequency transformer Download PDFInfo
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- CN102269786A CN102269786A CN2011101182003A CN201110118200A CN102269786A CN 102269786 A CN102269786 A CN 102269786A CN 2011101182003 A CN2011101182003 A CN 2011101182003A CN 201110118200 A CN201110118200 A CN 201110118200A CN 102269786 A CN102269786 A CN 102269786A
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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 test device, relate in particular to a kind of frequency tripling transformer load test unit, belong to the electric power application, be applied to that power transformer dispatches from the factory, the load test device after handing-over, overhaul and the fault.
Background technology
According to the GB requirement, under the power frequency condition, carry out the transformer load test, test current should reach 50%～100%Ie.Because the on-the-spot needed high capacity power supply of satisfied test that is difficult to is about about 10% of test specimen rated capacity, the load test of electric company can only be 10%Ie and following carrying out at present.Even adopt capacitor shunt compensation mode, when the 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 big, about 50 μ F, generally need about weight 50kg, tens in the capacitor of electric capacity 8 μ F, jumbo in addition pressure regulator and intermediate transformer, difficulty such as cause that transportation, carrying, wiring and scene are put, and the measurements and calculations error is also very big.
How can be under less power supply capacity conditions, it is convenient, fast and accurate that to carry out the transformer load test be the current engineering technology problem that needs to be resolved hurrily.
Summary of the invention
Patent of the present invention is at the problems referred to above, proposition utilizes 3 frequency multiplication generators as experiment power supply, by the low capacity compensator, realizes that electric current reaches the transformer load test unit of 50% Ie, solved in the prior art and can't under the 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 the tested transformer by pressure regulator, intermediate transformer, compensator is connected in parallel between intermediate transformer and the tested transformer, voltage table, reometer, power meter, frequency meter all are connected the former limit of tested transformer, and tested transformer is paid the limit short circuit.
Be parallel with control box between described 3 frequency multiplication generators and the pressure regulator.
Described pressure regulator is any in electric voltage regulator or the 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 the power frequency condition; All reduce greatly compensator volume, weight and required test site etc.
3, test connection facility, the 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 the small power supply capacity conditions, can carry out transformer load test, measure the short-circuit impedance and the load loss of transformer, provide important parameter for identifying transformer quality, performance service condition and temperature rise test.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a wiring diagram of the present invention.
Among the figure, T1-frequency tripling generator; The T2-pressure regulator; The T3-intermediate transformer; The tested transformer of T4-; Hz-hertz table; The A-reometer; The W-power meter; The V-voltage table; 1, control box, 2, compensator.
Embodiment
Below in conjunction with accompanying drawing, in conjunction with specific embodiments, it is as follows to describe the present invention.
3 frequency multiplication generators are parallel with control box as experiment power supply between 3 frequency multiplication generators and the pressure regulator; 3 frequency multiplication generators are loaded on the tested transformer by electric voltage regulator, intermediate transformer, capacitive compensator is connected in parallel between intermediate transformer and the tested transformer, voltage table, reometer, power meter, frequency meter are connected the former limit of tested transformer, and tested transformer is paid the limit short circuit.
Described pressure regulator is a manual voltage regulator, and compensator is the inductance compensation device, and other structure is with embodiment 1.
Technical indicator of the present invention is as follows:
1,3 frequencys multiplication generator-capacity 100kVA, frequency 150Hz, voltage 380kV;
2, capacitive compensator-many taps electric capacity;
3, inductance compensation device-many taps inductance;
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, tested transformer is inserted in the test circuit, select inductance or electric capacity as reactive-load compensator, tested transformer is paid the 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 corrected Calculation such as electric current, temperature, frequency again, obtain short-circuit impedance and load loss value under the power frequency condition.
Claims (4)
1. frequency tripling transformer load test unit, it is characterized in that 3 frequency multiplication generators are as experiment power supply, 3 frequency multiplication generators are loaded on the tested transformer by pressure regulator, intermediate transformer, compensator is connected in parallel between intermediate transformer and the tested transformer, voltage table, reometer, power meter, frequency meter all are connected the former limit of tested transformer, and tested transformer is paid the limit short circuit.
2. frequency tripling transformer load test unit according to claim 1 is characterized in that being parallel with control box between described 3 frequency multiplication generators and the pressure regulator.
3. frequency tripling transformer load test unit according to claim 1 is characterized in that described pressure regulator is any in electric voltage regulator or the manual voltage regulator.
4. frequency tripling transformer load test unit according to claim 1 is characterized in that described compensator is inductor or capacitor.
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 true CN102269786A (en) | 2011-12-07 |
| CN102269786B 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 |
Country Status (1)
| Country | Link |
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| CN (1) | CN102269786B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841257A (en) * | 2012-09-10 | 2012-12-26 | 江苏省电力公司苏州供电公司 | Instrument for measuring single-phase short-circuit impedance of transformer |
| 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 |
| CN109917214A (en) * | 2019-04-11 | 2019-06-21 | 孟庆安 | A kind of transformer temperature rise test capacitance compensation automatic control system |
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| JPH05137239A (en) * | 1991-11-13 | 1993-06-01 | Meidensha Corp | Method and circuit for testing ground directional relay |
| 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 |
-
2011
- 2011-05-09 CN CN201110118200.3A patent/CN102269786B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05137239A (en) * | 1991-11-13 | 1993-06-01 | Meidensha Corp | Method and circuit for testing ground directional relay |
| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841257A (en) * | 2012-09-10 | 2012-12-26 | 江苏省电力公司苏州供电公司 | Instrument for measuring single-phase short-circuit impedance of transformer |
| 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 |
| CN109917214A (en) * | 2019-04-11 | 2019-06-21 | 孟庆安 | A kind of transformer temperature rise test capacitance compensation automatic control system |
| CN109917214B (en) * | 2019-04-11 | 2024-02-06 | 孟庆安 | Automatic control system for capacitance compensation in temperature rise test of transformer |
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| Publication number | Publication date |
|---|---|
| CN102269786B (en) | 2014-02-19 |
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Owner name: STATE ELECTRIC NET CROP. Effective date: 20120919 |
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| TA01 | Transfer of patent application right |
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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