CN102508077B - Method for measuring no-load loss of zero phase angle of dual-core phase-shifting transformer - Google Patents
Method for measuring no-load loss of zero phase angle of dual-core phase-shifting transformer Download PDFInfo
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- CN102508077B CN102508077B CN 201110353833 CN201110353833A CN102508077B CN 102508077 B CN102508077 B CN 102508077B CN 201110353833 CN201110353833 CN 201110353833 CN 201110353833 A CN201110353833 A CN 201110353833A CN 102508077 B CN102508077 B CN 102508077B
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Abstract
The invention relates to a method for measuring no-load loss of a zero phase angle of a dual-core phase-shifting transformer, and belongs to the technical field of transformer tests. The technical scheme comprises the following steps of 1, adjusting a phase shifting switch to be an adjacent branching of the zero phase angle, connecting three low voltage neutral point terminals together, and grounding a high voltage neutral point, applying rated turn voltage of the zero phase angle from a low voltage side, and measuring the no-load loss of the transformer; 2, adjusting the phase shifting switch to be the adjacent branching of the zero phase angle, disconnecting the three connected low voltage neutral point terminals, grounding a high voltage neutral point, applying rated turn voltage of the zero phase angle from the low voltage side, and measuring the no-load loss of the transformer; and 3, calculating the no-load loss of a zero-phase-angle transformer. The method is suitable for measuring the no-load loss of the zero phase angle of the dual-core phase-shifting transformer of which three low voltage terminals and three lower voltage neutral point terminals are led out; the voltage and current which are applied in the method are very low; and by using the method, the no-load loss of the zero phase angle can be conveniently measured in a common laboratory.
Description
Technical field
The present invention relates to a kind of method of measuring no-load loss of zero phase angle of dual-core phase-shifting transformer, belong to the transformer test technical field.
Background technology
Phase-shifting transformer is again phase-angle adjuster, its mains side and load side voltage equate, are connected between two electric system, can control the electric current of each parallel branch of electric system in parallel, solution makes electric system efficiently and smoothly operated due to the overcurrent problem that transmission circuit in parallel causes.Phase-shifting transformer is three-phase transformer, presses core structure, can be divided into single core phase-shifting transformer and twin-core phase-shifting transformer.The structure of twin-core phase-shifting transformer is different from common power transformer, and it is comprised of exciting transformer and series transformer two parts, and two transformers have iron core separately, but the high pressure winding of two transformers and low pressure winding are connected to together.Usually, this transformer is only drawn high-tension line terminal, high pressure neutral point and low pressure neutral point, for satisfying the test needs, also low-voltage terminal is drawn when shop test.Propose in the power transformer test standard, the transformer noload losses measuring circuit is to apply the sinusoidal wave rated voltage of rated frequency at high pressure winding or low pressure winding, remaining winding open circuit, neutral ground.To the twin-core phase-shifting transformer, at the zero degree phase shifting angle, three low-voltage terminals can't apply voltage and carry out the zero load measurement by short circuit together, as applying voltage from the high-pressure side, need very high-tension testing transformer and measure PT, CT, the very difficult realization in ordinary test chamber.And this moment, series transformer is short-circuit condition, and exciting transformer is light condition, and excitation becomes has open circuit loss, background technology to be difficult to complete kind of a measurement no-load loss of zero phase angle of dual-core phase-shifting transformer.
Summary of the invention
The purpose of this invention is to provide a kind of method of measuring no-load loss of zero phase angle of dual-core phase-shifting transformer, realize the no-load loss of zero phase angle of dual-core phase-shifting transformer measurement, satisfy the shop test needs, complete the product testing task, solve the problems referred to above that background technology exists.
Technical scheme of the present invention is: a kind of method of measuring no-load loss of zero phase angle of dual-core phase-shifting transformer comprises following steps: 1. regulating phase switcher is the adjacent tap of zero degree phase shifting angle, and three low pressure neutral terminals link together, high pressure neutral ground; Apply the specified circle voltage of zero degree phase shifting angle from low-pressure side, the open circuit loss of measuring transformer, and the open circuit loss that records is counted Po1; 2. regulating phase switcher is the adjacent tap of zero degree phase shifting angle, the connection of opening three low pressure neutral terminals, high pressure neutral ground; Apply the specified circle voltage of zero degree phase shifting angle from low-pressure side, the open circuit loss of measuring transformer, and the open circuit loss that records is counted Po2; 3. calculate the open circuit loss Po of zero degree phase shifting angle transformer=Po2-Po1.
The enforcement order of the first step of the present invention and second step can be exchanged, but when net result calculates, the measurement result the when measurement result when attention will be used " neutral point connection " deducts " neutral point is opened ".
If ignore the measurement loss deviation that no-load current causes, can also implement this technical scheme in other non-zero degree phase shifting angle tap.
The open circuit loss measuring technique that the present invention relates to adopts prior art.
Good effect of the present invention: the present invention is applicable to the no-load loss of zero phase angle of dual-core phase-shifting transformer that three low-voltage terminals are drawn, three low pressure neutral terminals are drawn and measures, apply the voltage measurement no-load loss of zero phase angle of dual-core phase-shifting transformer from low-pressure side, the voltage that the method applies, electric current are very low, use the method conventional test chamber can realize easily that zero phase angle open circuit loss measures.
Description of drawings
Open circuit loss measuring circuit when Fig. 1 is the neutral point connection;
Fig. 2 is neutral point open circuit loss measuring circuit when opening;
In figure: experiment power supply 1, testing transformer 2, measurement current transformer 3, test specimen low pressure winding 4, test specimen high pressure winding 5, measurement instrument 6, measuring voltage mutual inductor 7.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described by embodiment.
A kind of method of measuring no-load loss of zero phase angle of dual-core phase-shifting transformer comprises following steps: 1. regulating phase switcher is the adjacent tap of zero degree phase shifting angle, and three low pressure neutral terminals link together, high pressure neutral ground; Apply the specified circle voltage of zero degree phase shifting angle from low-pressure side, the open circuit loss of measuring transformer, and the open circuit loss that records is counted Po1, with reference to accompanying drawing 1; 2. regulating phase switcher is the adjacent tap of zero degree phase shifting angle, the connection of opening three low pressure neutral terminals, high pressure neutral ground; Apply the specified circle voltage of zero degree phase shifting angle from low-pressure side, the open circuit loss of measuring transformer, and the open circuit loss that records is counted Po2, with reference to accompanying drawing 2; 3. calculate the open circuit loss Po of zero degree phase shifting angle transformer=Po2-Po1.
The testing equipment that the present invention is used: experiment power supply can be genset, can be also other form power supply; Measurement instrument can be common voltage table, reometer, watt meter, can be also power analyzer.
Claims (1)
1. method of measuring no-load loss of zero phase angle of dual-core phase-shifting transformer, it is characterized in that comprising following steps: 1. regulating phase switcher is the adjacent tap of zero degree phase shifting angle, three low pressure neutral terminals link together and ground connection, high pressure neutral ground; Apply the specified circle voltage of zero degree phase shifting angle from low-pressure side, the open circuit loss of measuring transformer, and the open circuit loss that records is counted Po1; 2. regulating phase switcher is the adjacent tap of zero degree phase shifting angle, the connection of opening three low pressure neutral terminals, high pressure neutral ground; Apply the specified circle voltage of zero degree phase shifting angle from low-pressure side, the open circuit loss of measuring transformer, and the open circuit loss that records is counted Po2; 3. calculate the open circuit loss Po of zero degree phase shifting angle transformer=Po2-Po1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110353833 CN102508077B (en) | 2011-11-10 | 2011-11-10 | Method for measuring no-load loss of zero phase angle of dual-core phase-shifting transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110353833 CN102508077B (en) | 2011-11-10 | 2011-11-10 | Method for measuring no-load loss of zero phase angle of dual-core phase-shifting transformer |
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| Publication Number | Publication Date |
|---|---|
| CN102508077A CN102508077A (en) | 2012-06-20 |
| CN102508077B true CN102508077B (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110353833 Expired - Fee Related CN102508077B (en) | 2011-11-10 | 2011-11-10 | Method for measuring no-load loss of zero phase angle of dual-core phase-shifting transformer |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103630797B (en) * | 2013-12-24 | 2017-03-29 | 国家电网公司 | A kind of transformator turn-to-turn short circuit detection means |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2069371C1 (en) * | 1993-06-29 | 1996-11-20 | Павел Анфимович Бутырин | Method of diagnostics of power transformers |
| CN201765285U (en) * | 2010-09-07 | 2011-03-16 | 山东达驰电气有限公司 | Device of monitoring real time wastage and load of transformer in operation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001054238A (en) * | 1999-08-09 | 2001-02-23 | Toshiba Corp | Drive control for transformer |
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2011
- 2011-11-10 CN CN 201110353833 patent/CN102508077B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2069371C1 (en) * | 1993-06-29 | 1996-11-20 | Павел Анфимович Бутырин | Method of diagnostics of power transformers |
| CN201765285U (en) * | 2010-09-07 | 2011-03-16 | 山东达驰电气有限公司 | Device of monitoring real time wastage and load of transformer in operation |
Non-Patent Citations (3)
| Title |
|---|
| 关于变压器低电压下空载试验的若干问题;王若星;《电气试验》;20050831;第1卷(第2期);第44-46页 * |
| 用空载试验发现大型变压器绕组质量缺陷;王明谦;《变压器》;20050831;第42卷(第8期);第16-20页 * |
| 配电变压器空载损耗测试的初步探讨;方魏江;《北京电力高等专科学校学报》;20101231;第27卷(第12期);第361-363页 * |
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| CN102508077A (en) | 2012-06-20 |
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