CN103594222A - Transformer pre-magnetizing device and pre-magnetizing method thereof - Google Patents
Transformer pre-magnetizing device and pre-magnetizing method thereof Download PDFInfo
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- CN103594222A CN103594222A CN201310614592.1A CN201310614592A CN103594222A CN 103594222 A CN103594222 A CN 103594222A CN 201310614592 A CN201310614592 A CN 201310614592A CN 103594222 A CN103594222 A CN 103594222A
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Abstract
The invention discloses a transformer pre-magnetizing device and a pre-magnetizing method of the transformer pre-magnetizing device. The transformer pre-magnetizing device comprises an intelligent main open circuit device, a transformer input end switch device, a pre-magnetizing switch device, a pre-magnetizing slide rheostat and a control circuit. One end of the intelligent main open circuit device is connected with a main input circuit, the other end of the intelligent main open circuit device is connected with one end of the pre-magnetizing switch device and one end of the transformer input end switch device, the other end of the pre-magnetizing switch device is connected with one end of the pre-magnetizing slide rheostat, the other end of the transformer input end switch device and the other end of the pre-magnetizing slide rheostat are connected with a primary side of a transformer, and the control circuit controls the switching motions of the transformer input end switch device and the pre-magnetizing switch device. The invention further discloses the pre-magnetizing method with the transformer pre-magnetizing device adopted. The transformer pre-magnetizing device can limit an excitation surge current when the large-sized transformer is applied to a small-capacity power grid in a power supply system, so that the transformer and the power grid are protected.
Description
Technical field
The invention belongs to safe power supply technical field, be specifically related to transformer pre-magnetizing device and the pre-magnetizing method thereof of a kind of operation on the sea device electric power system.
Background technology
Day by day heavy along with operation on the sea task, the capacity of operation on the sea device electrical network often cannot meet the electricity needs of many one-shot job tasks, and for this reason, must increase interim transformer is relevant device power supply.The magnetizing inrush current that interim transformer can produce when unloaded feeding device electrical network; cause protective device malfunction and shove in the injury of high order harmonic component to the responsive power electronic device in electrical network; simultaneously; in the time of on transformer access bus, can produce larger voltage drop, affect the normal operation of other equipment in electric power system.
In prior art scheme, only have series connected resistance to meet the particularity of operation on the sea device electric power system, but in view of the complexity of operation on the sea environment, traditional series connected resistance also has the following disadvantages:
1. the interim external transformer of operation on the sea device has certain mobility, and conventional solution cannot meet the requirement of every interim access transformer.
2. bulky, take up an area large.
3. shape system is fixed, and lacks flexibility, cannot motor-drivenly use.
Above-mentioned discussion content object be to reader introduce may to below by the various aspects of the relevant technology of the various aspects of the present invention that are described and/or advocate, believe that this discussion content contributes to provide background information for reader, to be conducive to understanding better various aspects of the present invention, therefore, should be appreciated that it is with this angle, to read these to discuss, rather than admit prior art.
Summary of the invention
The object of the invention is to avoid deficiency of the prior art and a kind of transformer pre-magnetizing device and pre-magnetizing method thereof are provided, can greatly reduce the amplitude of closing moment stable state magnetic flux and the transient state duration of magnetizing inrush current, simultaneity factor is simple in structure, reliability is high, mobility strong, easy to operate.
Object of the present invention is achieved through the following technical solutions:
A kind of transformer pre-magnetizing device is provided, comprise intelligent main circuit breaker, transformer input end switch device, pre-magnetizing switching device, pre-magnetizing slide rheostat, control circuit, described intelligent main circuit breaker one end and primary input connection, the other end and pre-magnetizing switching device one end, transformer input end switch device one end connects, the described pre-magnetizing switching device other end is connected with described pre-magnetizing slide rheostat one end, the described transformer input end switch device other end, the described pre-magnetizing slide rheostat other end is connected with the primary side of transformer, described control circuit control transformer input end switch device, the switch motion of pre-magnetizing switching device.
Wherein, the capacity of described pre-magnetizing slide rheostat and Standard resistance range are selected according to the situation of interim access transformer.
Wherein, described pre-magnetizing switching device is closed type circuit breaker or the contactor with contact and dropout control coil thereof.
Wherein, described transformer input end switch device is to have main contacts, wink dynamic auxiliary normally opened contact and contactor or the circuit breaker of control coil.
Wherein, described control circuit comprises the time relay, and the action of described transformer input end switch device contacts is controlled in described time relay time delay.
Wherein, the described time relay comprises control coil and timing closing contact.
Wherein, be 5s～10s timing closing contact time of delay of the described time relay.
Wherein, also comprise that the primary side of described small-sized two phase transformer is connected to the other end of intelligent main circuit breaker for small-sized two phase transformer to control circuit power supply.
The present invention also provides a kind of method that adopts transformer pre-magnetizing device as above to carry out transformer pre-magnetizing, and step is as follows:
S1, before transformer drops into electrical network, its iron core is carried out to degaussing, make the remanent magnetism of transformer close to 0;
S2, according to the concrete condition of electrical network, set the current setting of intelligent main circuit breaker;
S3, transformer pre-magnetizing device is accessed to electrical network, according to the actual conditions of the current setting of intelligent main circuit breaker and electrical network, adjust roughly the resistance of pre-magnetizing slide rheostat;
S4, press the switch knob of intelligent main circuit breaker, if this circuit breaker tripping of moment of closing a floodgate to the charging of pre-magnetizing slide rheostat at intelligent main circuit breaker, the resistance that pre-magnetizing slide rheostat is described is selected improper, the value of shoving of transformer is excessive, readjust its resistance, continuation is closed a floodgate to intelligent main circuit breaker, until intelligent main circuit breaker can close a floodgate according to desired value, now transformer starts to carry out pre-magnetizing;
S5, after the time delay of arrive setting, transformer input end switch device is closed, transformer primary side access primary input circuit, transformer drops into electrical network, meanwhile, pre-magnetizing switching device disconnects, pre-magnetizing process finishes.
The present invention, by the resistance it is suitable that transformer primary side is connected, gave its first logical little electric current, thereby makes it set up back-emf before Transformer Close drops into electrical network in certain hour, and then reached the object that the moment inhibition of closing a floodgate is shoved.The present invention has following advantage: the magnetizing inrush current in the time of 1, can limiting the medium-and-large-sized transformer input of electric power system low capacity electrical network, thus transformer and electrical network are protected; 2, adopt integrated design, greatly reduce and take up an area space, be especially applicable to the feature of operation on the sea device working space limitation; 3, adopt operating in a key, whole pre-magnetizing process completes automatically by control circuit, and reliability is high; 4, adopt pre-magnetizing slide rheostat, applied widely, the external transformer that can meet different capabilities accesses electrical network temporarily.
Accompanying drawing explanation
The invention will be further described to utilize accompanying drawing, but embodiment in accompanying drawing does not form any limitation of the invention, for those of ordinary skill in the art, is not paying under the prerequisite of creative work, can also obtain according to the following drawings other accompanying drawing.
Fig. 1 is the structural representation of transformer pre-magnetizing device.
Embodiment
In order to make those skilled in the art understand better technical scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, it should be noted that, in the situation that not conflicting, the application's embodiment and the feature in embodiment can combine mutually.
Core of the present invention is to provide a kind of transformer pre-magnetizing device; magnetizing inrush current while being applicable to limit the medium-and-large-sized transformer input of three-phase three-wire power supply system low capacity electrical network; and transformer primary side is delta connection; thereby transformer and electrical network are protected, be specially adapted to the electric power system of operation on the sea device.
Take offshore platform drilling well portion top drives transformer as example: its rated voltage is 400kVA as 400V, rated current as 577.4A, rated capacity.As shown in Figure 1, transformer pre-magnetizing device of the present invention, comprises intelligent main circuit breaker 1, transformer input end switch device 3, pre-magnetizing switching device 5, pre-magnetizing slide rheostat 6, control circuit 8.For the present embodiment, described intelligent main circuit breaker is selected people's electrical equipment DW45-6300/2000 series, described intelligent main circuit breaker 1 one end and primary input connection, and the other end is connected with pre-magnetizing switching device 5 one end, transformer input end switch device 3 one end.Described pre-magnetizing switching device 5 other ends are connected with described pre-magnetizing slide rheostat 6 one end, and described transformer input end switch device 3 other ends, described pre-magnetizing slide rheostat 6 other ends are connected with the primary side of transformer 7.The switch motion of described control circuit 8 control transformer input end switch devices 3, pre-magnetizing switching device 5, includes the control coil 3.2 of transformer input end switch device 3 and the control coil of pre-magnetizing switching device 5 in control circuit 8.
Preferably, the capacity of described pre-magnetizing slide rheostat 6 and Standard resistance range are selected according to the situation of interim access transformer.For the present embodiment, it is the high-power wiring adjustable resistor of BC1 type of 2000W that pre-magnetizing slide rheostat is selected power, and this resistance 0-150 ohm is adjustable.
Preferably, described pre-magnetizing switching device 5 is closed type circuit breaker or the contactors with contact and dropout control coil 5.1 thereof.For the present embodiment, the switching device of described pre-magnetizing switching device for connecting in short-term, be selected from low carrying rated value.
Preferably, described transformer input end switch device 3 is to have main contacts, wink dynamic auxiliary normally opened contact 3.1 and contactor or the circuit breaker of control coil 3.2.For the present embodiment, described transformer input end switch device is selected people's electrical equipment CJ40 series contactor.
Preferably, described control circuit 8 comprises the time relay 4, and the action of described transformer input end switch device 3 contacts is controlled in the described time relay 4 time delays.
Preferably, the described time relay 4 comprises control coil and timing closing contact 4.1.For the present embodiment, the described time relay is selected the Siemens 3RP1525 type time relay of German imported with original packaging.
Preferably, be 5s～10s 4.1 time of delays of timing closing contact of the described time relay 4.The present embodiment is elected 10s as.
Preferably, also comprise for small-sized two phase transformer 2 to control circuit 8 power supplies.The primary side of described small-sized two phase transformer 2 is connected to the other end of intelligent main circuit breaker 1, power taking on the incoming line of small-sized two phase transformer 2 after described intelligent main circuit breaker 1.For the present embodiment, described small-sized two-phase Transformer Selection be the step-down transformer of 480V/240V1.5kVA.
The present invention also provides a kind of transformer pre-magnetizing method, and the equipment using is above-mentioned pre-magnetizing device, and pre-magnetizing program is as follows:
1), before interim transformer 7 drops into electrical networks, its iron core is carried out to degaussing.After completing, degaussing thinks that the remanent magnetism of transformer is close to 0;
2), according to the concrete condition of electrical network, set the current setting of intelligent main circuit breaker 1;
3), by interim transformer and pre-magnetizing device access electrical network thereof.According to the actual conditions of the current setting of intelligent main circuit breaker 1 and electrical network, adjust roughly the resistance of pre-magnetizing slide rheostat 6;
4), press the switch knob of intelligent main circuit breaker 1;
5) if this circuit breaker tripping of moment of closing a floodgate to 6 chargings of pre-magnetizing slide rheostat at intelligent main circuit breaker 1 illustrates that the resistance selection of pre-magnetizing slide rheostat 6 is improper, the value of shoving of transformer is excessive.Readjust its resistance, continue intelligent main circuit breaker 1 to close a floodgate;
6), repeating step 4), 5) action, until intelligent main circuit breaker 1 can close a floodgate according to desired value.Now transformer starts to carry out pre-magnetizing;
7), the above-mentioned the 6th) in step, small-sized two phase transformer 2 must be established the control coil charging of beginning to the time relay 4 by cable;
8), after arriving the time delay of setting, timing closing contact 4.1 closures of the time relay 4, the control coil 3.2 of transformer input end switch device 3 electric, its main contacts and wink dynamic auxiliary normally opened contact 3.1 closures, transformer input mains supply line is connected, and transformer drops into electrical network;
9), the above-mentioned the 8th) in step, the dropout control coil 5.1 of pre-magnetizing switching device 5 electric, its normally-closed contact disconnects immediately, pre-magnetizing process finishes.
In description above, set forth a lot of details so that fully understand the present invention, still, the present invention can also adopt other to be different from other modes described here and implement, and therefore, can not be interpreted as limiting the scope of the invention.
In a word; although the present invention has exemplified above-mentioned preferred implementation, should illustrate, although those skilled in the art can carry out various variations and remodeling; unless such variation and remodeling have departed from scope of the present invention, otherwise all should be included in protection scope of the present invention.
Claims (9)
1. a transformer pre-magnetizing device, it is characterized in that: comprise intelligent main circuit breaker (1), transformer input end switch device (3), pre-magnetizing switching device (5), pre-magnetizing slide rheostat (6), control circuit (8), described intelligent main circuit breaker (1) one end and primary input connection, the other end and pre-magnetizing switching device (5) one end, transformer input end switch device (3) one end connects, described pre-magnetizing switching device (5) other end is connected with described pre-magnetizing slide rheostat (6) one end, described transformer input end switch device (3) other end, described pre-magnetizing slide rheostat (6) other end is connected with the primary side of transformer (7), described control circuit (8) control transformer input end switch device (3), the switch motion of pre-magnetizing switching device (5).
2. transformer pre-magnetizing device according to claim 1, is characterized in that: the capacity of described pre-magnetizing slide rheostat (6) and Standard resistance range are selected according to the situation of interim access transformer.
3. transformer pre-magnetizing device according to claim 1, is characterized in that: described pre-magnetizing switching device (5) is closed type circuit breaker or the contactor with contact and dropout control coil (5.1) thereof.
4. transformer pre-magnetizing device according to claim 1, is characterized in that: described transformer input end switch device (3) is contactor or the circuit breaker with main contacts, wink dynamic auxiliary normally opened contact (3.1) and control coil (3.2).
5. transformer pre-magnetizing device according to claim 1, is characterized in that: described control circuit (8) comprises the time relay (4), and the action of described transformer input end switch device (3) contact is controlled in the described time relay (4) time delay.
6. transformer pre-magnetizing device according to claim 5, is characterized in that: the described time relay (4) comprises control coil and timing closing contact (4.1).
7. transformer pre-magnetizing device according to claim 6, is characterized in that, be 5s～10s timing closing contact (4.1) time of delay of the described time relay (4).
8. according to the transformer pre-magnetizing device described in any one in claim 1 to 7, it is characterized in that: also comprise that the primary side of described small-sized two phase transformer (2) is connected to the other end of intelligent main circuit breaker (1) for small-sized two phase transformer (2) to control circuit (8) power supply.
9. the transformer pre-magnetizing device of employing as described in any one in claim 1 to 8 carries out a method for transformer pre-magnetizing, it is characterized in that, step is as follows:
S1, before transformer drops into electrical network, its iron core is carried out to degaussing, make the remanent magnetism of transformer close to 0;
S2, according to the concrete condition of electrical network, set the current setting of intelligent main circuit breaker;
S3, transformer pre-magnetizing device is accessed to electrical network, according to the actual conditions of the current setting of intelligent main circuit breaker and electrical network, adjust roughly the resistance of pre-magnetizing slide rheostat;
S4, press the switch knob of intelligent main circuit breaker, if this circuit breaker tripping of moment of closing a floodgate to the charging of pre-magnetizing slide rheostat at intelligent main circuit breaker, the resistance that pre-magnetizing slide rheostat is described is selected improper, the value of shoving of transformer is excessive, readjust its resistance, continuation is closed a floodgate to intelligent main circuit breaker, until intelligent main circuit breaker can close a floodgate according to desired value, now transformer starts to carry out pre-magnetizing;
S5, after the time delay of arrive setting, transformer input end switch device is closed, transformer primary side access primary input circuit, transformer drops into electrical network, meanwhile, pre-magnetizing switching device disconnects, pre-magnetizing process finishes.
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| CN201310614592.1A CN103594222B (en) | 2013-11-28 | 2013-11-28 | Transformer pre-magnetizing device carries out the method for transformer pre-magnetizing |
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| CN201310614592.1A CN103594222B (en) | 2013-11-28 | 2013-11-28 | Transformer pre-magnetizing device carries out the method for transformer pre-magnetizing |
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| CN103594222A true CN103594222A (en) | 2014-02-19 |
| CN103594222B CN103594222B (en) | 2016-03-09 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065051B (en) * | 2014-06-26 | 2017-06-13 | 许继电气股份有限公司 | A kind of transformer inrush current suppression apparatus suitable for the frequent unloaded input of testing transformer |
| CN108987075A (en) * | 2018-07-05 | 2018-12-11 | 上海电动工具研究所（集团）有限公司 | Electric system on high-tension transformer based on multistage preliminary filling magnetic function |
| CN109103860A (en) * | 2018-11-01 | 2018-12-28 | 广州供电局有限公司 | Marine transformer preliminary filling magnetism method based on concatenation small capacity transformer |
| CN109448952A (en) * | 2018-12-19 | 2019-03-08 | 卧龙电气南阳防爆集团股份有限公司 | A kind of low pressure pre-magnetizing system and method for high-power fairing |
| US11955782B1 (en) | 2022-11-01 | 2024-04-09 | Typhon Technology Solutions (U.S.), Llc | System and method for fracturing of underground formations using electric grid power |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0254727A1 (en) * | 1985-12-31 | 1988-02-03 | Sikora Gernot | Transformer, especially for a driver stage. |
| CN101702360A (en) * | 2009-11-10 | 2010-05-05 | 中国船舶重工集团公司第七一二研究所 | Pre-magnetizing device of power supply transformer and pre-magnetizing method thereof |
| CN201732648U (en) * | 2010-07-26 | 2011-02-02 | 武汉港迪电气有限公司 | Transformer pre-magnetizing device |
| CN201749184U (en) * | 2010-07-27 | 2011-02-16 | 海盐天明电测器材科技有限公司 | Automatic I-shaped template pressure-connecting check device for single-phase electric energy meter |
| 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 |
| CN203588792U (en) * | 2013-11-28 | 2014-05-07 | 中国海洋石油总公司 | Transformer pre-magnetizing device |
-
2013
- 2013-11-28 CN CN201310614592.1A patent/CN103594222B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0254727A1 (en) * | 1985-12-31 | 1988-02-03 | Sikora Gernot | Transformer, especially for a driver stage. |
| EP0254727B1 (en) * | 1985-12-31 | 1991-03-20 | Sikora, Gernot, Dipl.-Ing. | Transformer, especially for a driver stage |
| CN101702360A (en) * | 2009-11-10 | 2010-05-05 | 中国船舶重工集团公司第七一二研究所 | Pre-magnetizing device of power supply transformer and pre-magnetizing method thereof |
| CN201732648U (en) * | 2010-07-26 | 2011-02-02 | 武汉港迪电气有限公司 | Transformer pre-magnetizing device |
| CN201749184U (en) * | 2010-07-27 | 2011-02-16 | 海盐天明电测器材科技有限公司 | Automatic I-shaped template pressure-connecting check device for single-phase electric energy meter |
| 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 |
| CN203588792U (en) * | 2013-11-28 | 2014-05-07 | 中国海洋石油总公司 | Transformer pre-magnetizing device |
Non-Patent Citations (1)
| Title |
|---|
| 李琥 等: "断路器合闸电阻对变压器励磁涌流的影响", 《高压电器》, vol. 39, no. 1, 28 February 2003 (2003-02-28), pages 16 - 18 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065051B (en) * | 2014-06-26 | 2017-06-13 | 许继电气股份有限公司 | A kind of transformer inrush current suppression apparatus suitable for the frequent unloaded input of testing transformer |
| CN108987075A (en) * | 2018-07-05 | 2018-12-11 | 上海电动工具研究所（集团）有限公司 | Electric system on high-tension transformer based on multistage preliminary filling magnetic function |
| CN109103860A (en) * | 2018-11-01 | 2018-12-28 | 广州供电局有限公司 | Marine transformer preliminary filling magnetism method based on concatenation small capacity transformer |
| CN109103860B (en) * | 2018-11-01 | 2019-12-13 | 广州供电局有限公司 | Pre-magnetizing method for marine transformer based on series connection of small-capacity transformers |
| CN109448952A (en) * | 2018-12-19 | 2019-03-08 | 卧龙电气南阳防爆集团股份有限公司 | A kind of low pressure pre-magnetizing system and method for high-power fairing |
| 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 |
| US11955782B1 (en) | 2022-11-01 | 2024-04-09 | Typhon Technology Solutions (U.S.), Llc | System and method for fracturing of underground formations using electric grid power |
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