CN101702360B - Pre-magnetizing device of power supply transformer and pre-magnetizing method thereof - Google Patents
Pre-magnetizing device of power supply transformer and pre-magnetizing method thereof Download PDFInfo
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- CN101702360B CN101702360B CN200910272719XA CN200910272719A CN101702360B CN 101702360 B CN101702360 B CN 101702360B CN 200910272719X A CN200910272719X A CN 200910272719XA CN 200910272719 A CN200910272719 A CN 200910272719A CN 101702360 B CN101702360 B CN 101702360B
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Abstract
The invention relates to a pre-magnetizing device of a power supply transformer and a pre-magnetizing method thereof, which are applicable to limiting impulse current when connecting a large transformer into a power grid and further protecting the power supply transformer and the power grid, in particular to being applicable to marine electric propulsion systems. The pre-magnetizing device comprises a pre-magnetizing transformer for connecting with the power supply transformer; and a pre-magnetizing switch device for switching-on and switching-off is arranged at the input end of the pre-magnetizing transformer, and the pre-magnetizing switch device comprises a main contact, an instantaneous auxiliary contact and a delay auxiliary contact. The pre-magnetizing method of the power supply transformer relates to the pre-magnetizing procedure. The pre-magnetizing device has the advantages of small volume, small heat value, simple structure, flexible wiring, safety, stability, in-situ installation in a power supply transformer body or a power distribution screen, low overall cost, convenient replacement and maintenance and the like.
Description
Technical field
The present invention relates to a kind of supply transformer pre-magnetizing device and pre-magnetizing method thereof; Belong to the safe power supply technical field; Impulse current when being suitable for limiting high-power transformer input electrical network; Thereby supply transformer and electrical network are protected, and made working stability, be specially adapted to watercraft electric propulsion system.
Background technology
In network of ship, for separate unit unit capacity in the supply transformer capacity of big capacity loads such as propelling power supplies and the electrical network suitable.When supply transformer drops into network of ship; Its coil is not set up back-emf, and this moment, transformer was equivalent to short-circuit condition for electrical network, and transient state short-circuit current may cause the misoperation of circuit breaker; Also can cause falling suddenly of line voltage, have a strong impact on power grid quality.To the impact of electrical network, the pre-magnetizing device can be set when dropping into, that is: earlier to the logical little electric current of supply transformer, make supply transformer set up back-emf, the supply transformer Head switches of closing again, the impulse current when reducing the transformer input for weakening supply transformer.
What the pre-magnetizing device of prior art adopted is resistor proposal.The advantage that adopts resistance to carry out pre-magnetizing is that circuit is simple, but has following shortcoming:
1. the every resistor that needs a platform independent mutually of supply transformer, volume is bigger;
2. caloric value is bigger;
3. can not change voltage, phase place, must be from the power taking of supply transformer front end electrical network.
Summary of the invention
The objective of the invention is to, overcome the shortcoming of prior art, a kind of supply transformer pre-magnetizing device is provided, reduce the capacity of pre-magnetizing device greatly; And the shared three-phase transformer of three-phase circuit carries out pre-magnetizing, and in the pre-magnetizing loop, internal resistance is very little, and its caloric value is very little, and makes working stability.In addition, adopt transformer to carry out pre-magnetizing, through the pre-magnetizing transformer boost, phase shift; Guarantee that its secondary voltage, phase place are consistent with main electrical network, supply transformer is carried out pre-magnetizing, can adopt the low-pressure side pre-magnetizing for medium voltage network like this; Can save medium voltage switchgear equipment, reduce cost greatly.
The technical scheme of a kind of supply transformer pre-magnetizing device of the present invention is: it comprises a pre-magnetizing transformer that is used for the supply transformer connection; Said pre-magnetizing transformer input is useful on the pre-magnetizing switching device of control break-make, and this pre-magnetizing switching device includes main contacts, moves auxiliary contact and time-delay auxiliary contact wink.
Further technical scheme is:
Described supply transformer pre-magnetizing device, its pre-magnetizing transformer are the three-phase transformers that the input main circuit breaker with supply transformer is connected in parallel.
Described supply transformer pre-magnetizing device, its pre-magnetizing transformer are that output is connected with the supply transformer input, the three-phase transformer that input is connected with the output of daily transformer.
Described supply transformer pre-magnetizing device, its pre-magnetizing transformer output voltage amplitude is consistent with the amplitude and the phase place of main electrical network with phase place.
Described supply transformer pre-magnetizing device, its pre-magnetizing transformer input voltage amplitude is identical with daily electrical network with phase place, and output voltage amplitude is consistent with the former limit of phase place and supply transformer master's electrical network.
Described supply transformer pre-magnetizing device, its pre-magnetizing transformer is the low capacity three-phase transformer, the capacity round numbers is selected from 5kVA, 10kVA, 20kVA, 30kVA.
Described supply transformer pre-magnetizing device, its pre-magnetizing transformer pre-magnetizing time range is smaller or equal to 30S.
Described supply transformer pre-magnetizing device, its pre-magnetizing switching device be can be connected with main circuit breaker have main contacts, and wink moving auxiliary contact, time-delay auxiliary contact, control line bag contactor or circuit breaker.
Described supply transformer pre-magnetizing device, the switching device of its pre-magnetizing switching device for connecting in short-term, be selected from low carrying rated value.
The technical scheme of a kind of supply transformer pre-magnetizing of the present invention method is:
Employed equipment is above-mentioned pre-magnetizing device, and the pre-magnetizing program is following:
1), receive supply transformer input main circuit breaker combined floodgate control wave after, pre-magnetizing switching device action begins to carry out pre-magnetizing;
2), the above-mentioned the 1st) in the step, belong to the moving auxiliary contact demand working of wink of pre-magnetizing switching device, the control line bag of self-locking pre-magnetizing switching device;
3), after the time-delay that arrive to set, the time-delay auxiliary contact of pre-magnetizing switching device are closed, connect the main circuit breaker closing coil, main circuit breaker closes a floodgate;
4), the above-mentioned the 3rd) in the step, open main circuit breaker normally off contact, breaks off the control line bag of pre-magnetizing switching device, the pre-magnetizing process finishes;
5), after receiving supply transformer input main circuit breaker separating brake control wave, the main circuit breaker switching winding is connected, the direct separating brake of circuit breaker.
This present invention's principle and outstanding beneficial effect are: pre-magnetizing adopts a small transformers and relevant control piece technical scheme; For the main transformer of need input carries out pre-magnetizing; Utilizing pre-magnetizing is the principle of connecting in short-term, and the pre-magnetizing electric current is the short circuit current of pre-magnetizing transformer, its short circuit current be rated current smaller or equal to 30 times; Can reduce the capacity of pre-magnetizing device so greatly, and the shared three-phase transformer of three-phase circuit carries out pre-magnetizing.Because in the pre-magnetizing loop, the pre-magnetizing transformer mainly is reactance, internal resistance is very little, and its caloric value is very little.In addition, adopt transformer to carry out pre-magnetizing, can also carry out pre-magnetizing from other electrical network power taking.Such as in the oceangoing ship electrical network of delaying unloading a ship, the former limit of pre-magnetizing transformer can be connected to low voltage electric network, through the pre-magnetizing transformer boost, phase shift; Guarantee that its secondary voltage, phase place are consistent with main electrical network; The main transformer supply transformer is carried out pre-magnetizing, can save medium voltage switchgear equipment like this, reduce cost greatly.In a word the present invention have that volume is little, caloric value is little, simple in structure, wiring flexibly, safety and stability, can be installed in the supply transformer body on the spot or in the switchboard, overall cost is low, be convenient to change advantage such as maintenance.
Description of drawings
Fig. 1 is one embodiment of the present of invention: the pre-magnetizing major loop sketch map that the input main circuit breaker of pre-magnetizing transformer and supply transformer is connected in parallel;
Fig. 2 is another embodiment of the present invention: its output of pre-magnetizing transformer is connected with the supply transformer input, and input has the pre-magnetizing major loop sketch map that is connected with the output of daily transformer;
Fig. 3 is embodiment sketch map of pre-magnetizing control loop of the present invention.
Each device name is among the figure:
1-(T0) pre-magnetizing transformer; 2-(KM1) pre-magnetizing switching device; 2.1-wink is moved auxiliary contact; 2.2-time-delay auxiliary contact; 2.3-control line bag; 3-(QF1) main circuit breaker; 3.1-(QF1:OF) main circuit breaker normally off contact; 3.2-(QF1:MX) main circuit breaker switching winding; 3.3-(QF1:XF) main circuit breaker closing coil; 4-(T1) supply transformer; The daily transformer of 5-(T2); 6-master's electrical network; 7-day is used electrical network.
Embodiment
In conjunction with accompanying drawing and instance supply transformer pre-magnetizing device of the present invention is described further as follows:
Embodiment 1:
Embodiment as shown in Figure 1, pre-magnetizing transformer 1 are the three-phase transformers that the input main circuit breaker 3 with supply transformer 4 is connected in parallel.Present embodiment is the technical scheme of carrying out pre-magnetizing through the main electrical network 6 of routine.The pre-magnetizing device can be installed in the supply transformer body at the scene on the spot, also can be installed in the switchboard.Impulse current when being particularly suitable for limiting high-power transformer input electrical network, thus electrical network is protected.The described supply transformer pre-magnetizing of present embodiment device, it has a pre-magnetizing transformer 1 that is used for supply transformer 4 connections; Said pre-magnetizing transformer 1 input is useful on the pre-magnetizing switching device 2 of break-make, and this pre-magnetizing switching device 2 includes main contacts, moves auxiliary contact 2.1 and time-delay auxiliary contact 2.2 wink.Said pre-magnetizing transformer 1 output voltage amplitude is consistent with the amplitude and the phase place of main electrical network 6 with phase place; Pre-magnetizing transformer 1 is the pre-magnetizing transformer that 1: 1 Y/Y connects method for no-load voltage ratio; Said pre-magnetizing transformer 1 is the low capacity three-phase transformer, and the capacity round numbers is selected from 5kVA, 10kVA, 20kVA, 30kVA, and present embodiment is elected 5kVA as.Said pre-magnetizing transformer 1 pre-magnetizing time range is that present embodiment is elected 5S as smaller or equal to 30S.Also can elect the pre-magnetizing transformer capacity as 10kVA or 20kVA or 30kVA.Said pre-magnetizing switching device 2 has main contacts, reaches the contactor of moving auxiliary contact 2.1 of wink, time-delay auxiliary contact 2.2, control line bag 2.3, or elects circuit breaker as; Main circuit breaker 3 includes main circuit breaker normally off contact 3.1, main circuit breaker switching winding 3.2, main circuit breaker closing coil 3.3.The switching device of said pre-magnetizing switching device 2 for connecting in short-term, be selected from low carrying rated value.
Embodiment 2:
As shown in Figure 2, different with the foregoing description 1 is: be different electrical network pre-magnetizing schemes.Said pre-magnetizing transformer 1 is that output is connected with the supply transformer input, the three-phase transformer that input is connected with the output of daily transformer 5.Pre-magnetizing transformer 1 input voltage amplitude and phase place are identical with daily electrical network 7, and output voltage amplitude is consistent with supply transformer 4 former limit master's electrical networks 6 with phase place, and present embodiment is elected 30kVA as.Said pre-magnetizing transformer 1 pre-magnetizing time range is that present embodiment is elected 30S as smaller or equal to 30S.Also can elect the pre-magnetizing transformer capacity as 5kVA or 10kVA or 20kVA.Pre-magnetizing transformer 1 its no-load voltage ratio guarantees that with to connect method all identical with daily transformer 5 voltage magnitude of daily electrical network 7 behind pre-magnetizing transformer 1 is consistent with supply transformer 4 former limit master's electrical networks 6 with phase place.
In conjunction with accompanying drawing 3 and instance supply transformer pre-magnetizing method of the present invention is described further as follows:
Embodiment 3:
A kind of supply transformer pre-magnetizing of the present invention method, employed equipment is above-mentioned pre-magnetizing device, the pre-magnetizing program is following:
1), receive supply transformer 4 input main circuit breakers 3 combined floodgate control waves after, pre-magnetizing switching device 2 action begins to carry out pre-magnetizing;
2), the above-mentioned the 1st) in the step, belong to moving auxiliary contact 2.1 demand workings of 2 its winks of pre-magnetizing switching device of contactor, the control line bag 2.3 of self-locking pre-magnetizing switching device 2;
3), after the time-delay that arrive to set, time-delay auxiliary contact 2.2 closures of pre-magnetizing switching device 2 are connected main circuit breaker closing coil 3.3, main circuit breaker 3 closes a floodgate;
4), the above-mentioned the 3rd) in the step, open main circuit breaker normally off contact 3.1, breaks off the control line bag 2.3 of pre-magnetizing switching device 2, the pre-magnetizing process finishes;
5), after receiving supply transformer 4 input main circuit breakers 3 separating brake control waves, main circuit breaker switching winding 3.2 is connected, the direct separating brake of circuit breaker.
Claims (6)
1. a supply transformer pre-magnetizing device is characterized in that, it comprises that is used for the pre-magnetizing transformer (1) that same supply transformer (4) connects; Said pre-magnetizing transformer (1) input is useful on the pre-magnetizing switching device (2) of break-make, and this pre-magnetizing switching device (2) includes main contacts, moves auxiliary contact (2.1) and time-delay auxiliary contact (2.2) wink; Said pre-magnetizing transformer (1) is the three-phase transformer that the input main circuit breaker (3) with supply transformer (4) is connected in parallel; Perhaps said pre-magnetizing transformer (1) is that output is connected with supply transformer (4) input, the three-phase transformer that input is connected with the output of daily transformer (5).
2. supply transformer pre-magnetizing device as claimed in claim 1 is characterized in that, said pre-magnetizing transformer (1) output voltage amplitude is consistent with the amplitude and the phase place of main electrical network (6) with phase place.
3. supply transformer pre-magnetizing device as claimed in claim 1 is characterized in that said pre-magnetizing transformer (1) is the low capacity three-phase transformer, and the capacity round numbers is selected from 5kVA, 10kVA, 20kVA, 30kVA.
4. supply transformer pre-magnetizing device as claimed in claim 1 is characterized in that, said pre-magnetizing transformer (1) pre-magnetizing time range is smaller or equal to 30S.
5. supply transformer pre-magnetizing device as claimed in claim 1 is characterized in that, the switching device of said pre-magnetizing switching device (2) for connecting in short-term, be selected from low carrying rated value.
6. a supply transformer pre-magnetizing method is characterized in that, employed equipment is the pre-magnetizing device of aforesaid right requirement 1-5 in each, and the pre-magnetizing program is following:
1), receive supply transformer (4) input main circuit breaker (3) combined floodgate control wave after, pre-magnetizing switching device (2) action begins to carry out pre-magnetizing;
2), the above-mentioned the 1st) in the step, belong to moving auxiliary contact (2.1) demand working of wink of pre-magnetizing switching device (2), the control line bag (2.3) of self-locking pre-magnetizing switching device (2);
3), after the time-delay that arrive to set, time-delay auxiliary contact (2.2) closure of pre-magnetizing switching device (2) is connected main circuit breaker closing coil (3.3), main circuit breaker (3) closes a floodgate;
4), the above-mentioned the 3rd) in the step, open main circuit breaker normally off contact (3.1), breaks off the control line bag (2.3) of pre-magnetizing switching device (2), the pre-magnetizing process finishes;
5), after receiving supply transformer (4) input main circuit breaker (3) separating brake control wave, main circuit breaker switching winding (3.2) is connected, the direct separating brake of circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272719XA CN101702360B (en) | 2009-11-10 | 2009-11-10 | Pre-magnetizing device of power supply transformer and pre-magnetizing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910272719XA CN101702360B (en) | 2009-11-10 | 2009-11-10 | Pre-magnetizing device of power supply transformer and pre-magnetizing method thereof |
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| CN101702360A CN101702360A (en) | 2010-05-05 |
| CN101702360B true CN101702360B (en) | 2012-02-08 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684097B (en) * | 2012-06-13 | 2015-06-10 | 中国船舶重工集团公司第七0四研究所 | Pre-magnetizing medium-voltage power distribution device |
| CN102779612A (en) * | 2012-08-07 | 2012-11-14 | 泰州海田电气制造有限公司 | Pre-magnetizing device for main power supply transformer of electric power circuit |
| CN103683192A (en) * | 2013-11-06 | 2014-03-26 | 天津瑞能电气有限公司 | Large-capacity phase shift rectification transformer excitation inrush current suppression apparatus and method |
| CN103594222B (en) * | 2013-11-28 | 2016-03-09 | 中国海洋石油总公司 | Transformer pre-magnetizing device carries out the method for transformer pre-magnetizing |
| CN105048410A (en) * | 2015-08-26 | 2015-11-11 | 上海船舶研究设计院 | Power transformer pre-excitation system of diving support boat |
| CN109448952B (en) * | 2018-12-19 | 2023-11-24 | 卧龙电气南阳防爆集团股份有限公司 | Low-voltage pre-magnetizing system and method for high-voltage high-power rectifying device |
| CN112350298B (en) * | 2020-09-29 | 2024-07-09 | 西安中车永电电气有限公司 | Marine redundant auxiliary system and control method thereof |
| CN112865180B (en) * | 2021-02-23 | 2023-06-20 | 海南金盘智能科技股份有限公司 | Flexible grid-connected auxiliary device of power transformer |
| CN117117794B (en) * | 2023-10-12 | 2024-02-27 | 广东省洛仑兹技术股份有限公司 | Transformer pre-magnetizing circuit and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4682114A (en) * | 1983-04-15 | 1987-07-21 | Cgr/Mev | Power modulator provided with a transformer |
| CN101075498A (en) * | 2007-04-13 | 2007-11-21 | 中国南车集团株洲电力机车研究所 | Method and device for inhibiting transformer no-load switchon surge |
| CN201146370Y (en) * | 2007-12-10 | 2008-11-05 | 广州电器科学研究院 | Apparatus for reducing excitation inrush current of rectifier transformer |
| CN101557096A (en) * | 2009-01-21 | 2009-10-14 | 湖南大学 | Voltage transformer excitation surge current free idle-loaded switching-on controller |
| CN201527875U (en) * | 2009-11-10 | 2010-07-14 | 中国船舶重工集团公司第七一二研究所 | Pre-magnetizing device of power supply transformer |
-
2009
- 2009-11-10 CN CN200910272719XA patent/CN101702360B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4682114A (en) * | 1983-04-15 | 1987-07-21 | Cgr/Mev | Power modulator provided with a transformer |
| CN101075498A (en) * | 2007-04-13 | 2007-11-21 | 中国南车集团株洲电力机车研究所 | Method and device for inhibiting transformer no-load switchon surge |
| CN201146370Y (en) * | 2007-12-10 | 2008-11-05 | 广州电器科学研究院 | Apparatus for reducing excitation inrush current of rectifier transformer |
| CN101557096A (en) * | 2009-01-21 | 2009-10-14 | 湖南大学 | Voltage transformer excitation surge current free idle-loaded switching-on controller |
| CN201527875U (en) * | 2009-11-10 | 2010-07-14 | 中国船舶重工集团公司第七一二研究所 | Pre-magnetizing device of power supply transformer |
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Effective date of registration: 20151009 Address after: 430064, Wuhan City, Hubei province Hongshan District Lion Hill Street South Lake (steam School Village) Patentee after: Wuhan Changhai electric propulsion and chemical power supply Co., Ltd. Address before: 430064 Hubei City, Hongshan District, lion street, steam school, a village Patentee before: No.712 Inst., China Ship Heavy Industry Group Co. |