CN202182925U - Power supply for testing short circuit bearing capability of power transformer - Google Patents
Power supply for testing short circuit bearing capability of power transformer Download PDFInfo
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- CN202182925U CN202182925U CN201120288060XU CN201120288060U CN202182925U CN 202182925 U CN202182925 U CN 202182925U CN 201120288060X U CN201120288060X U CN 201120288060XU CN 201120288060 U CN201120288060 U CN 201120288060U CN 202182925 U CN202182925 U CN 202182925U
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- power supply
- transformer
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Abstract
The power supply is composed of a set of power supply step up transformers and control switches, wherein the primary levels of the power supply step up transformers are connected to a test power supply in parallel via a corresponding control switch; and the secondary levels of the power supply step up transformer are serially or parallelly connected to a tested output circuit via a corresponding control switch, thereby improving output voltage, expanding output capacity, and forming a power supply testing the short circuit bearing capability of a power transformer. The secondary level of each power supply step up transformer is provided with eight output end sockets according to the requirements of the test, thus to meet the demand of various test voltages and test capacities.
Description
Technical field
The utility model relates to the experiment power supply that a kind of power transformer bears short-circuit capacity, belongs to the high-voltage test techniques field.
Background technology
GB1094 national Specification, power transformer should undamaged requirements under the excess current effect that is caused by external short circuit.That is to say that power transformer and assembly thereof and annex should be designed and manufactured into the heat that can bear external short circuit and moving stabilizing effect and not damaged.Characterizing this characteristic is called: power transformer bears the ability of short circuit.
The ability that test high voltage large capcity power transformer bears short circuit is very difficult; It needs the experiment power supply of higher trial voltage and bigger test capacity and can accomplish; Owing to receive the restriction of test condition; User and manufacturing side consult, and select for use by calculating, design and manufacturing checking synchronously, but the requirement of this method prove with similar transformer or the short-circuit test on representational model of having done short-circuit test.This similar transformer confirm very difficulty, it requires, and the method for operation is identical, project organization is identical, the arrangement of main winding is identical with how much subregion orders, winding lead material is identical, main winding type is identical or the like.Therefore, cause some high voltage large capcity power transformers can't examine checking to bear the ability of short circuit, bring certain hidden danger with using for the power construction of China.
The utility model content
Bear the experiment power supply of short-circuit capacity to above-mentioned power transformer; Its trial voltage and test capacity can not satisfy the defective of testing requirements; The technical matters that the utility model solved is to provide a kind of power transformer to bear the experiment power supply of short-circuit capacity, to satisfy the needs that power transformer bears short-circuit capacity.
The utility model comprises one group of power supply step-up transformer of employing and CS composition; The elementary control corresponding switch in parallel of passing through of power supply step-up transformer is on experiment power supply; Power supply step-up transformer secondary is through control corresponding switch series connection or be connected in parallel in the output circuit of test; Thereby the raising output voltage enlarges output capacity, forms the experiment power supply that a kind of power transformer bears short-circuit capacity.Every secondary requirement by test of power supply step-up transformer all is provided with 8 output terminations, to adapt to the needs of different tests voltage and test capacity.
Description of drawings
Fig. 1 is the synoptic diagram of the utility model embodiment.
Fig. 2 goes out line chart for the power supply step-up transformer of the utility model embodiment is secondary.
Embodiment
Below through the embodiment of specific instantiation explanation the utility model, those skilled in the art can be understood the advantage and the effect of the utility model easily by the content that instructions disclosed.The utility model also can be implemented or uses through other different instantiations, and each item details in this instructions also can be carried out various modifications and change based on different viewpoints and application under the spirit that does not deviate from the utility model.
The synoptic diagram of the utility model embodiment, as shown in Figure 1, power transformer bears the experiment power supply of short-circuit capacity and mainly is made up of CSs such as T1～T4 four 1200MVA power supplys step-up transformer and K1～K6.Four 1200MVA power supplys of T1～T4 step-up transformer is elementary and be connected on A, the B-source line A, B-source line connection 30500MVA surge generator group; Four secondary serial or parallel connections of 1200MVA power supply step-up transformer are delivered to test port, are connected with quilt examination power transformer, carry out the test that power transformer bears short-circuit capacity.Be the satisfied requirement that is tried the different voltages of power transformer, different capabilities, the secondary outlet of every 1200MVA power supply step-up transformer, as shown in Figure 2; Be provided with 8 outlet terminations; Form 4 groups of voltages, every group of voltage is 61kV, and 4 groups of maximum output voltages are 61kV * 4=244kV.Power transformer bears experiment power supply leading-out terminal 0 ground connection of short-circuit capacity, guarantees that each leading-out terminal voltage-to-ground can not surpass 244kV * 2=488kV, and four 1200MVA power supplys of T1～T4 step-up transformer maximum operating voltage designs with this numerical value.When T1 connects with T3, promptly K5 is closed; T2 connects with T4, and promptly K6 is closed; And then parallel connection, promptly leading-out terminal 3 with leading-out terminal 4 and together, and between the leading-out terminal 0, the output ceiling voltage is 488kV, Maximum Power Output is 4800MVA.
By the ceiling voltage 550kV among China power transformer standard GB/T6451-2008 " oil-immersed power transformer technical parameter and requirement ", the test that max cap. 720MVA oil-immersed power transformer bears short-circuit capacity.Regulation that GB 1094.5-2008 " power transformer the 5th part: the ability of bearing short circuit " the 4th chapter " bears the checking of the ability of short circuit ": use single phase poaer supply; For Y-connected winding; Single-phase voltage should put between a line end and all the other two line ends that link together; During test,
of voltage between phases doubly when single-phase voltage should equal three-phase test.Order to calculate the test voltage is
; power transformers ability to withstand short circuit test power output maximum voltage 488kV> 476.3kV meet the test requirements.Capacity 720MVA oil-immersed power transformer; Short-circuit impedance by GB/T6451-2008 " oil-immersed power transformer technical parameter and requirement " table 31 regulation is 14% or 16%, with short-circuit impedance be 14% calculate three-phase line the short-circuit test capacity be 720MVA ÷ 14%=5142.86MVA; Be converted into again GB1094.5-2008 " power transformer the 5th part: the ability of bearing short circuit " the 4th chapter " bear the checking of the ability of short circuit " regulation test circuit, the short-circuit test capacity is 5142.86MVA ÷ 2=2571.43MVA; Consider the internal resistance of line impedance and quilt examination transformer; Power transformer bears the Maximum Power Output 4800MVA of the experiment power supply of short-circuit capacity, can satisfy the test that all oil-immersed power transformers bear short-circuit capacity among the GB/T6451-2008 " oil-immersed power transformer technical parameter and requirement " fully.
The foregoing description is merely the principle and the effect thereof of exemplary illustration the utility model, but not is used to limit the utility model.Any those skilled in the art all can be under the spirit and category of the utility model, and the foregoing description is modified and changed.Therefore, the rights protection scope of the utility model should be foundation with the scope of claims.
Claims (3)
1. a power transformer bears the experiment power supply of short-circuit capacity, it is characterized in that, is made up of one group of power supply step-up transformer and CS.
2. a kind of power transformer according to claim 1 bears the experiment power supply of short-circuit capacity; It is characterized in that; On experiment power supply, power supply step-up transformer secondary is through control corresponding switch series connection or be connected in parallel in the output circuit of test through the control corresponding switch in parallel for power supply step-up transformer elementary.
3. a kind of power transformer according to claim 1 bears the experiment power supply of short-circuit capacity, it is characterized in that, every secondary requirement by test of power supply step-up transformer all is provided with 8 output terminations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120288060XU CN202182925U (en) | 2011-08-10 | 2011-08-10 | Power supply for testing short circuit bearing capability of power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120288060XU CN202182925U (en) | 2011-08-10 | 2011-08-10 | Power supply for testing short circuit bearing capability of power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202182925U true CN202182925U (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120288060XU Expired - Lifetime CN202182925U (en) | 2011-08-10 | 2011-08-10 | Power supply for testing short circuit bearing capability of power transformer |
Country Status (1)
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| CN (1) | CN202182925U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748311A (en) * | 2017-09-15 | 2018-03-02 | 沈阳变压器研究院股份有限公司 | A kind of short-circuit ability to bear checking system of power transformer |
| CN109709425A (en) * | 2018-12-29 | 2019-05-03 | 国网冀北电力有限公司电力科学研究院 | A kind of distribution transformer bears the pilot system and method for short-circuit capacity |
| CN110165904A (en) * | 2019-05-07 | 2019-08-23 | 中国农业大学 | A kind of transformer short-circuit experiment power supply |
| CN113985191A (en) * | 2021-12-29 | 2022-01-28 | 苏州电器科学研究院股份有限公司 | System and method for testing short circuit bearing capacity of extra-high voltage transformer |
-
2011
- 2011-08-10 CN CN201120288060XU patent/CN202182925U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748311A (en) * | 2017-09-15 | 2018-03-02 | 沈阳变压器研究院股份有限公司 | A kind of short-circuit ability to bear checking system of power transformer |
| CN109709425A (en) * | 2018-12-29 | 2019-05-03 | 国网冀北电力有限公司电力科学研究院 | A kind of distribution transformer bears the pilot system and method for short-circuit capacity |
| CN110165904A (en) * | 2019-05-07 | 2019-08-23 | 中国农业大学 | A kind of transformer short-circuit experiment power supply |
| CN113985191A (en) * | 2021-12-29 | 2022-01-28 | 苏州电器科学研究院股份有限公司 | System and method for testing short circuit bearing capacity of extra-high voltage transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120404 |
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| CX01 | Expiry of patent term |