CN102779612A - Pre-magnetizing device for main power supply transformer of electric power circuit - Google Patents
Pre-magnetizing device for main power supply transformer of electric power circuit Download PDFInfo
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- CN102779612A CN102779612A CN2012102895286A CN201210289528A CN102779612A CN 102779612 A CN102779612 A CN 102779612A CN 2012102895286 A CN2012102895286 A CN 2012102895286A CN 201210289528 A CN201210289528 A CN 201210289528A CN 102779612 A CN102779612 A CN 102779612A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention discloses a pre-magnetizing device for a power supply main transformer of an electric power circuit, relating to the field of pre-magnetizing devices for pre-magnetizing power supply transformers through pre-magnetizing transformers. A primary side and a secondary side of a pre-magnetizing transformer (2) are respectively connected with a pre-magnetizing transformer primary side circuit breaker (1) and a pre-magnetizing transformer secondary side circuit breaker (3); the pre-magnetizing transformer secondary side circuit breaker (3) is connected to the primary side of a power supply main transformer (4) or the secondary side (6) of the power supply main transformer; the primary side of the power supply main transformer (4) is connected with the electric power circuit (7) through a power supply main transformer primary side circuit breaker (5); and a pre-magnetizing transformer primary side circuit breaker closing coil, a pre-magnetizing transformer secondary side circuit breaker closing coil, a power supply main transformer primary side circuit breaker closing coil (10), a pre-magnetizing transformer magnetizing time relay (11) and a power supply main transformer magnetizing time relay (12) and relevant contacts thereof are connected between the end A and the end B of the power supply control loop terminal. The pre-magnetizing device is convenient for operation and short in magnetizing time.
Description
Technical field
Power circuit of the present invention power supply main transformer relates to through the pre-magnetizing transformer with the pre-magnetizing device power supply main transformer is carried out pre-magnetizing, when inserting power circuit with the main transformer that prevents to supply power it is produced the pre-magnetizing device field of excessive impulse current.
Background technology
When on power circuit, directly inserting the power supply main transformer; In the power supply main transformer, can produce very big temporary impact electric current; Voltage on the power circuit is descended suddenly; Thereby influence the power supply quality of power circuit, for the main transformer that reduces to supply power is linked on the power circuit power supply of power circuit produced and impact, then should design a kind of pre-magnetizing device that power circuit power supply main transformer is used that is used for; The interior magnetizing inrush current that produces of main transformer so that reduce to supply power, and guarantee the power supply of power circuit safety and stability.
Summary of the invention
The purpose of this invention is to provide a kind of power circuit power supply main transformer and use the pre-magnetizing device; After the pre-magnetizing transformer carries out pre-magnetizing through the pre-magnetizing transformer secondary circuit breaker that is connected with the power supply former limit of main transformer or secondary to the power supply main transformer, make the power supply main transformer through the former limit of main transformer circuit breaker and the purpose that obtains stable power-supplying after power circuit is connected of supplying power to reach.
Power circuit power supply main transformer is used the pre-magnetizing device; Form by the former limit of pre-magnetizing transformer circuit breaker, pre-magnetizing transformer, pre-magnetizing transformer secondary circuit breaker, power supply main transformer, power supply main transformer former limit circuit breaker and power circuit; The former limit of the pre-magnetizing transformer of three-phase and secondary are connected with three-phase phase corresponding pre-magnetizing transformer former limit circuit breaker and pre-magnetizing transformer secondary circuit breaker respectively; The pre-magnetizing transformer secondary circuit breaker of three-phase is connected corresponding former limit of power supply main transformer of three-phase phase or power supply main transformer secondary, and the former limit of three phase supply main transformer is connected through the corresponding former limit of the power supply main transformer circuit breaker power circuit corresponding with three-phase phase of three-phase phase; Between control electric power loop terminal side a and b two ends, be parallel with:
(1) pre-magnetizing transformer secondary breaker closing coil, the power supply main transformer series circuit that time relay time-delay break contact and the former limit of the pre-magnetizing transformer circuit breaker first normally opened contact three are in series that magnetizes;
(2) power supply main transformer former limit breaker closing coil and the pre-magnetizing transformer series circuit that time relay timing closing contact is in series that magnetizes;
(3) the pre-magnetizing transformer series circuit that the time relay and the former limit of pre-magnetizing transformer circuit breaker second normally opened contact are in series that magnetizes; And
(4) the power supply main transformer series circuit that the time relay and power supply main transformer former limit circuit breaker second normally opened contact are in series that magnetizes;
The former limit of pre-magnetizing transformer breaker closing coil one end is connected with the B end, and the other end is connected pre-magnetizing transformer secondary breaker closing coil and the power supply main transformer magnetizes between the time relay time-delay break contact;
Power supply main transformer switching signal contact one end is connected with the A end, and the other end is connected the former limit of pre-magnetizing transformer circuit breaker first normally opened contact and the power supply main transformer magnetizes between the time relay time-delay break contact;
The former limit of power supply main transformer circuit breaker first normally opened contact one end is connected with the A end, and the other end is connected the pre-magnetizing transformer and magnetizes between time relay timing closing contact and the former limit of the power supply main transformer breaker closing coil.
Power circuit power supply main transformer is explained as follows with pre-magnetizing Design of device principle:
Large-scale to the user supply power usefulness main transformer (hereinafter to be referred as the power supply main transformer) load for unloaded situation under; When being connected with transmission line if directly close a floodgate, owing to the iron core of amount of power supply main transformer has remanent magnetism, and the reason of its phase difference when coming into operation; Can in the power supply main transformer, produce magnetizing inrush current; Maximum magnetizing inrush current may reach 6～8 times of power supply main transformer rated current, and this magnetizing inrush current can cause the misoperation of tranformer protection device on the one hand, meeting overstep tripping when serious; Influence the reliability of whole power supply; On the other hand power supply main transformer coil is also had percussion, if between power supply main transformer and transmission line, close a floodgate is connected before, through the pre-magnetizing transformer main transformer of supplying power is carried out pre-magnetizing earlier; And then will supply power main transformer and transmission line combined floodgate; Just can the magnetizing inrush current in the power supply main transformer be reduced to below the rated current of power supply main transformer, thereby can greatly improve the reliability of supplying power, and power supply main transformer coil is also played a very good protection.
When former limit or the secondary of power supply main transformer being carried out pre-magnetizing, must guarantee that pre-magnetizing Circuit Fault on Secondary Transformer phase place is in full accord with power supply former limit of main transformer or secondary phase place, otherwise can cause circulation, the power supply main transformer is damaged through the pre-magnetizing transformer.
Guarantee the pre-magnetizing transformer and the power supply main transformer between wiring errorless after, carry out in advance towards magnetic according to the following steps again.
1, the power supply main transformer switching signal contact with contact on the distribution panelboard is closed when closing as operating personnel; At this moment the former limit of pre-magnetizing transformer breaker closing coil between the control power supply that is connected side a and b on the distribution panelboard and pre-magnetizing transformer secondary breaker closing coil just have electric current and flow through; Make and be connected the former limit of pre-magnetizing transformer circuit breaker first normally opened contact closure and the self-insurance between the time relay time-delay break contact of magnetizing of control power supply A end and power supply main transformer; Then pre-magnetizing transformer former limit circuit breaker and pre-magnetizing transformer secondary circuit breaker both are closed connects; At this moment the pre-magnetizing transformer just obtains power supply, just can magnetize to the power supply main transformer.
2, after the former limit of pre-magnetizing transformer breaker closing coil and pre-magnetizing transformer secondary breaker closing coil have electric current to flow through; Then make the former limit of pre-magnetizing transformer circuit breaker second normally opened contact closed; The time relay and the former limit of pre-magnetizing transformer circuit breaker second normally opened contact are connected in series between the control power supply side a and b because the pre-magnetizing transformer magnetizes; The pre-magnetizing transformer is magnetized switches in the time relay; Through making the pre-magnetizing transformer time relay timing closing closing of contact that magnetizes again after the time-delay in 10 seconds; Time relay delayed contact and the former limit of power supply main transformer breaker closing coil are connected in series between the control power supply side a and b because the pre-magnetizing transformer magnetizes, and then make the former limit of power supply main transformer breaker closing coil electricity.
3, behind the breaker closing coil electricity of the former limit of power supply main transformer; Just make an end be connected control power supply A end in addition end be connected the former limit of power supply main transformer circuit breaker first normally opened contact closure and the self-insurance between time relay timing closing contact and the former limit of the power supply main transformer breaker closing coil of magnetizing of pre-magnetizing transformer; Like this; Just make the former limit of power supply main transformer circuit breaker be connected connection with supply line; Thereby, make the power supply main transformer can access the electric supply that power circuit transports.
4, behind the breaker closing coil electricity of the former limit of power supply main transformer; Make the former limit of power supply main transformer circuit breaker second normally opened contact closed; The time relay is connected in series between the control power supply side a and b because power supply main transformer former limit circuit breaker second normally opened contact and power supply main transformer magnetize; Then make the magnetize time relay energising of power supply main transformer, magnetize after the time, the power supply main transformer time relay time-delay break contact that magnetizes is broken off through control in 10～15 seconds; Then make the former limit of pre-magnetizing transformer breaker closing coil and pre-magnetizing transformer secondary breaker closing coil both dead electricity; Pre-magnetizing transformer and power supply main transformer are broken off fully, simultaneously, pre-magnetizing transformer and power circuit are also broken off.
5, after the power supply main transformer is de-energized for some reason; In the time of need resetting electricly again, then repeat above-mentioned steps, the pre-magnetizing transformer is magnetized to the power supply main transformer; After magnetizing in 10～15 seconds; Then the pre-magnetizing transformer breaks off with the power supply main transformer, after the power supply main transformer obtains normal electric supply from power circuit again, can supply power to the user.
Power circuit power supply main transformer of the present invention is simple with the pre-magnetizing apparatus structure, easy to operate, and the time of magnetizing is short, and control is accurate, and guarantee to supply power main transformer and power circuit can both safe operations.
Description of drawings
Fig. 1: in advance towards the former limit of magnetic transformer circuit breaker 1, pre-magnetizing transformer 2, connect wiring schematic diagrams towards magnetic transformer secondary circuit breaker 3, power supply main transformer 4, the former limit of power supply main transformer circuit breaker 5, power supply main transformer secondary 6 and power circuit 7 in advance.
Fig. 2: the pre-magnetizing process control line map of 2 pairs of power supply main transformers 4 of pre-magnetizing transformer.
Embodiment
Referring to Fig. 1 and Fig. 2; Power circuit power supply main transformer is used the pre-magnetizing device; Form by the former limit of pre-magnetizing transformer circuit breaker 1, pre-magnetizing transformer 2, pre-magnetizing transformer secondary circuit breaker 3, power supply main transformer 4, power supply main transformer former limit circuit breaker 5 and power circuit 7; The former limit of the pre-magnetizing transformer 2 of three-phase and secondary are connected with the three-phase phase corresponding former limit of pre-magnetizing transformer circuit breaker 1 and pre-magnetizing transformer secondary circuit breaker 3 respectively; The pre-magnetizing transformer secondary circuit breaker 3 of three-phase is connected corresponding power supply main transformer 4 former limits of three-phase phase or power supply main transformer secondary 6, and three phase supply main transformer 4 former limits are connected through the corresponding former limit of power supply main transformer circuit breaker 5 power circuit 7 corresponding with three-phase phase of three-phase phase; Between control electric power loop terminal side a and b two ends, be parallel with:
(1) pre-magnetizing transformer secondary breaker closing coil 9, the power supply main transformer series circuit that time relay time-delay break contact 19 and the former limit of pre-magnetizing transformer circuit breaker first normally opened contact 14 threes are in series that magnetizes;
(2) power supply main transformer former limit breaker closing coil 10 and the pre-magnetizing transformer series circuit that time relay timing closing contact 16 is in series that magnetizes;
(3) the pre-magnetizing transformer series circuit that the time relay 11 and the former limit of pre-magnetizing transformer circuit breaker second normally opened contact 17 are in series that magnetizes; And
(4) the power supply main transformer series circuit that the time relay 12 and the former limit of power supply main transformer circuit breaker second normally opened contact 18 are in series that magnetizes;
The former limit of pre-magnetizing transformer breaker closing coil 8 one ends are connected with the B end, and the other end is connected pre-magnetizing transformer secondary breaker closing coil 9 and the power supply main transformer magnetizes between the time relay time-delay break contact 19;
Power supply main transformer switching signal contact 13 1 ends are connected with the A end, and the other end is connected the former limit of pre-magnetizing transformer circuit breaker first normally opened contact 14 and the power supply main transformer magnetizes between the time relay time-delay break contact 19;
The former limit of power supply main transformer circuit breaker first normally opened contact 15 1 ends are connected with the A end, and the other end is connected the pre-magnetizing transformer and magnetizes between time relay timing closing contact 16 and the former limit of the power supply main transformer breaker closing coil 10.
The capacity of pre-magnetizing transformer 2 is selected for use according to 0.8～1.5% of power supply main transformer 4 capacity, and the capacity of power supply main transformer 4 is generally between 2500 kilovolt-amperes to 10000 kilovolt-amperes.
The power supply main transformer time relay 12 that magnetizes is controlled in advance towards the time of magnetizing of 2 pairs of power supply main transformers 4 of magnetic transformer and is controlled between 10～15 seconds through the magnetize disconnection of time relay time-delay break contact 19 of power supply main transformer.
Supply voltage between the control electric power loop terminal side a and b can be 110 volts supply voltage or 220 volts supply voltage, and the control power supply can be DC power supply or AC power.
Claims (3)
1. power circuit power supply main transformer is used the pre-magnetizing device; Form by the former limit of pre-magnetizing transformer circuit breaker (1), pre-magnetizing transformer (2), pre-magnetizing transformer secondary circuit breaker (3), power supply main transformer (4), power supply main transformer former limit circuit breaker (5) and power circuit (7); The former limit and the secondary that it is characterized in that the pre-magnetizing transformer (2) of three-phase are connected with the three-phase phase corresponding former limit of pre-magnetizing transformer circuit breaker (1) and pre-magnetizing transformer secondary circuit breaker (3) respectively; The pre-magnetizing transformer secondary circuit breaker (3) of three-phase is connected corresponding former limit of power supply main transformer (4) of three-phase phase or power supply main transformer secondary (6), and the former limit of three phase supply main transformer (4) is connected through the corresponding former limit of power supply main transformer circuit breaker (5) power circuit (7) corresponding with three-phase phase of three-phase phase; Between control electric power loop terminal side a and b two ends, be parallel with:
(1) pre-magnetizing transformer secondary breaker closing coil (9), the power supply main transformer series circuit that time relay time-delay break contact (19) and the former limit of pre-magnetizing transformer circuit breaker first normally opened contact (14) three are in series that magnetizes;
(2) power supply main transformer former limit breaker closing coil (10) and the pre-magnetizing transformer series circuit that time relay timing closing contact (16) is in series that magnetizes;
(3) the pre-magnetizing transformer series circuit that the time relay (11) and the former limit of pre-magnetizing transformer circuit breaker second normally opened contact (17) are in series that magnetizes; And
(4) the power supply main transformer series circuit that the time relay (12) and main transformer former limit circuit breaker second normally opened contact (18) of supplying power are in series that magnetizes;
The former limit of pre-magnetizing transformer breaker closing coil (8) one ends are connected with the B end, and the other end is connected pre-magnetizing transformer secondary breaker closing coil (9) and the power supply main transformer magnetizes between the time relay time-delay break contact (19);
Power supply main transformer switching signal contact (13) one ends are connected with the A end, and the other end is connected the former limit of pre-magnetizing transformer circuit breaker first normally opened contact (14) and the power supply main transformer magnetizes between the time relay time-delay break contact (19);
The former limit of power supply main transformer circuit breaker first normally opened contact (15) one ends are connected with the A end, and the other end is connected the pre-magnetizing transformer and magnetizes between time relay timing closing contact (16) and the power supply main transformer former limit breaker closing coil (10).
2. power circuit according to claim 1 power supply main transformer is used the pre-magnetizing device, and the capacity that it is characterized in that pre-magnetizing transformer (2) is selected for use according to the 0.8-1.5% of power supply main transformer (4) capacity; In advance towards magnetic transformer (2) to the power supply main transformer (4) the time of magnetizing be controlled at 10-15 between second.
3. power circuit power supply main transformer according to claim 1 is used the pre-magnetizing device, and the supply voltage that it is characterized in that controlling between the electric power loop terminal side a and b can be 110 volts DC power supply voltage or 220 volts AC supply voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102895286A CN102779612A (en) | 2012-08-07 | 2012-08-07 | Pre-magnetizing device for main power supply transformer of electric power circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102895286A CN102779612A (en) | 2012-08-07 | 2012-08-07 | Pre-magnetizing device for main power supply transformer of electric power circuit |
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| CN2012102895286A Pending CN102779612A (en) | 2012-08-07 | 2012-08-07 | Pre-magnetizing device for main power supply transformer of electric power circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594222A (en) * | 2013-11-28 | 2014-02-19 | 中国海洋石油总公司 | Transformer pre-magnetizing device and pre-magnetizing method thereof |
| 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 |
| 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 |
| CN117117794A (en) * | 2023-10-12 | 2023-11-24 | 广东省洛仑兹技术股份有限公司 | Transformer pre-magnetizing circuit and control method thereof |
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| JPH05199662A (en) * | 1992-01-20 | 1993-08-06 | Toshiba Corp | Uninterruptible power supply distribution system |
| 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 |
| 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 |
| CN202711902U (en) * | 2012-08-07 | 2013-01-30 | 泰州海田电气制造有限公司 | Pre-magnetizing device for power supply main transformer of power line |
-
2012
- 2012-08-07 CN CN2012102895286A patent/CN102779612A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05199662A (en) * | 1992-01-20 | 1993-08-06 | Toshiba Corp | Uninterruptible power supply distribution system |
| 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 |
| 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 |
| CN202711902U (en) * | 2012-08-07 | 2013-01-30 | 泰州海田电气制造有限公司 | Pre-magnetizing device for power supply main transformer of power line |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103594222A (en) * | 2013-11-28 | 2014-02-19 | 中国海洋石油总公司 | Transformer pre-magnetizing device and pre-magnetizing method thereof |
| 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 |
| CN117117794A (en) * | 2023-10-12 | 2023-11-24 | 广东省洛仑兹技术股份有限公司 | Transformer pre-magnetizing circuit and control method thereof |
| 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 |
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Application publication date: 20121114 |