CN202711902U - Pre-magnetizing device for power supply main transformer of power line - Google Patents
Pre-magnetizing device for power supply main transformer of power line Download PDFInfo
- Publication number
- CN202711902U CN202711902U CN 201220403170 CN201220403170U CN202711902U CN 202711902 U CN202711902 U CN 202711902U CN 201220403170 CN201220403170 CN 201220403170 CN 201220403170 U CN201220403170 U CN 201220403170U CN 202711902 U CN202711902 U CN 202711902U
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- magnetizing
- power supply
- transformer
- supply main
- main transformer
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Abstract
The utility model relates to a pre-magnetizing device for a power supply main transformer of a power line, relating the field of pre-magnetizing devices for pre-magnetizing a power supply main transformer through a pre-magnetizing transformer. A primary side and a secondary side of the 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 a primary side of the 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 a power line (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 circuit breaker closing coil (10), a pre-magnetizing transformer magnetizing time relay (11), a power supply main transformer magnetizing time relay (12) and relevant contacts are connected between an end A and an end B of a control power supply loop terminal. The pre-magnetizing device is convenient for operation and is short in magnetizing time.
Description
Technical field
The utility model power circuit power supply main transformer relates to by the pre-magnetizing transformer with pre-magnetizing device the power supply main transformer is carried out pre-magnetizing, it is produced the pre-magnetizing device field of excessive impulse current when preventing from powering main transformer access power circuit.
Background technology
When directly main transformer is powered in access on power circuit, in the power supply main transformer, can produce very large temporary impact electric current, voltage on the power circuit is descended suddenly, thereby affect the power supply quality of power circuit, for the main transformer that reduces to power is linked on the power circuit power supply of power circuit produced and to impact, then should design a kind of pre-magnetizing device of using for power circuit power supply main transformer, the interior magnetizing inrush current that produces of main transformer in order to reduce to power, and guarantee the power supply of power circuit safety and stability.
Summary of the invention
The purpose of this utility model provides a kind of power circuit power supply main transformer pre-magnetizing device, after the pre-magnetizing transformer carries out pre-magnetizing by 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 by the former limit of main transformer circuit breaker and the purpose that obtains stable power-supplying after power circuit is connected of powering to reach.
Power circuit power supply main transformer pre-magnetizing device, by pre-magnetizing transformer primary side circuit breaker, the pre-magnetizing transformer, pre-magnetizing transformer secondary circuit breaker, the power supply main transformer, power supply main transformer former limit circuit breaker and power circuit form, the former limit of the pre-magnetizing transformer of three-phase and secondary are connected with respectively pre-magnetizing transformer primary side circuit breaker corresponding to three-phase phase and pre-magnetizing transformer secondary circuit breaker, the pre-magnetizing transformer secondary circuit breaker of three-phase is connected to the former limit of power supply main transformer corresponding to three-phase phase or power supply main transformer secondary, and the former limit of three phase supply main transformer is connected by the former limit of the power supply main transformer circuit breaker power circuit corresponding with three-phase phase corresponding to 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 pre-magnetizing transformer primary side circuit breaker the 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 pre-magnetizing transformer primary side circuit breaker the 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 the second normally opened contact are in series that magnetizes;
Pre-magnetizing transformer primary side breaker closing coil one end is connected with the B end, and the other end is connected to 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 to pre-magnetizing transformer primary side circuit breaker the 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 the first normally opened contact one end is connected with the A end, and the other end is connected to 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 described as follows with the design principle of pre-magnetizing device:
The large-scale main transformer (hereinafter to be referred as the power supply main transformer) that customer power supply is used is in the situation of zero load in load; when if directly combined floodgate is connected with transmission line; because the iron core of amount of power supply main transformer has remanent magnetism; and the reason of phase difference when it comes 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; this magnetizing inrush current can cause the misoperation of tranformer protection device on the one hand; meeting overstep tripping when serious; affect whole power supply reliability; on the other hand power supply main transformer coil also there is percussion; if close a floodgate between power supply main transformer and the transmission line be connected before; by the pre-magnetizing transformer power supply main transformer is carried out first pre-magnetizing; and then will power main transformer and transmission line combined floodgate; just the magnetizing inrush current in the power supply main transformer can be reduced to below the rated current of power supply main transformer; thereby can greatly improve power supply reliability, and power supply main transformer coil has also been played a very good protection.
When by the pre-magnetizing transformer power supply former limit of main transformer or secondary being carried out pre-magnetizing, must guarantee that pre-magnetizing Circuit Fault on Secondary Transformer phase place is in full accord with the power supply former limit of main transformer or secondary phase place, otherwise can cause circulation, the power supply main transformer is damaged.
Guarantee the pre-magnetizing transformer and the power supply main transformer between wiring errorless after, rush in advance according to the following steps again magnetic.
1, when operating personnel close the power supply main transformer switching signal contact with contact on the distribution panelboard when closing, at this moment the pre-magnetizing transformer primary side breaker closing coil between the control power supply that is connected to 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 to magnetize pre-magnetizing transformer primary side circuit breaker the first normally opened contact closure and the self-insurance between the time relay time-delay break contact of control power supply A end and power supply main transformer, then both closed connections of pre-magnetizing transformer primary side circuit breaker and pre-magnetizing transformer secondary circuit breaker, at this moment the pre-magnetizing transformer just obtains power supply, just can magnetize to the power supply main transformer.
2, after pre-magnetizing transformer primary side breaker closing coil and pre-magnetizing transformer secondary breaker closing coil have electric current to flow through, then make pre-magnetizing transformer primary side circuit breaker the second normally opened contact closed, the time relay and pre-magnetizing transformer primary side circuit breaker the 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 again the pre-magnetizing transformer time relay timing closing closing of contact that magnetizes 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 to control power supply A end another end and be connected to magnetize the former limit of power supply main transformer circuit breaker the 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 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 the 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 the 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 through control in 10～15 seconds, the power supply main transformer time relay time-delay break contact that magnetizes is disconnected, then make both dead electricity of pre-magnetizing transformer primary side breaker closing coil and pre-magnetizing transformer secondary breaker closing coil, pre-magnetizing transformer and power supply main transformer are disconnected fully, simultaneously, pre-magnetizing transformer and power circuit are also disconnected.
5, after the power supply main transformer is de-energized for some reason, in the time of need to resetting again electricly, 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 disconnects with the power supply main transformer, after the power supply main transformer obtains normal electric supply from power circuit again, can power to the user.
The utility model power circuit power supply main transformer is simple in structure, easy to operate with pre-magnetizing device, and the time of magnetizing is short, and control is accurate, and guarantee to power main transformer and power circuit can both safe operations.
Description of drawings
Fig. 1: rush in advance the former limit of magnetic transformer circuit breaker 1, pre-magnetizing transformer 2, rush 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 and connect wiring schematic diagrams.
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 pre-magnetizing device, by pre-magnetizing transformer primary side 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 form, the former limit of the pre-magnetizing transformer 2 of three-phase and secondary are connected with respectively pre-magnetizing transformer primary side circuit breaker 1 corresponding to three-phase phase and pre-magnetizing transformer secondary circuit breaker 3, the pre-magnetizing transformer secondary circuit breaker 3 of three-phase is connected to power supply main transformer corresponding to three-phase phase 4 former limits or power supply main transformer secondary 6, and three phase supply main transformer 4 former limits are connected by the former limit of power supply main transformer circuit breaker 5 power circuit 7 corresponding with three-phase phase corresponding to 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 pre-magnetizing transformer primary side circuit breaker the 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 pre-magnetizing transformer primary side circuit breaker the 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 the second normally opened contact 18 are in series that magnetizes;
Pre-magnetizing transformer primary side breaker closing coil 8 one ends are connected with the B end, and the other end is connected to 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 to pre-magnetizing transformer primary side circuit breaker the 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 the first normally opened contact 15 1 ends are connected with the A end, and the other end is connected to 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 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 the time of magnetizing of rushing in advance 2 pairs of power supply main transformers 4 of magnetic transformer and is controlled between 10～15 seconds by 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 pre-magnetizing device, by pre-magnetizing transformer primary side 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) form, the former limit and the secondary that it is characterized in that the pre-magnetizing transformer (2) of three-phase are connected with respectively pre-magnetizing transformer primary side circuit breaker (1) corresponding to three-phase phase and pre-magnetizing transformer secondary circuit breaker (3), the pre-magnetizing transformer secondary circuit breaker (3) of three-phase is connected to the former limit of power supply main transformer (4) corresponding to three-phase phase or power supply main transformer secondary (6), and the former limit of three phase supply main transformer (4) is connected by the former limit of power supply main transformer circuit breaker (5) corresponding to the three-phase phase power circuit (7) corresponding with 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 pre-magnetizing transformer primary side circuit breaker the 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 pre-magnetizing transformer primary side circuit breaker the 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 the second normally opened contact (18) of powering are in series that magnetizes;
Pre-magnetizing transformer primary side breaker closing coil (8) one ends are connected with the B end, and the other end is connected to 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 to pre-magnetizing transformer primary side circuit breaker the 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 the first normally opened contact (15) one ends are connected with the A end, and the other end is connected to 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 pre-magnetizing device, the capacity that it is characterized in that pre-magnetizing transformer (2) is selected according to the 0.8-1.5% of main transformer (4) capacity of powering; Rush in advance magnetic transformer (2) to the power supply main transformer (4) the time of magnetizing be controlled at 10-15 between second.
3. power circuit according to claim 1 power supply main transformer pre-magnetizing device, 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 |
|---|---|---|---|
| CN 201220403170 CN202711902U (en) | 2012-08-07 | 2012-08-07 | Pre-magnetizing device for power supply main transformer of power line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220403170 CN202711902U (en) | 2012-08-07 | 2012-08-07 | Pre-magnetizing device for power supply main transformer of power line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202711902U true CN202711902U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220403170 Expired - Fee Related CN202711902U (en) | 2012-08-07 | 2012-08-07 | Pre-magnetizing device for power supply main transformer of power line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202711902U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2012
- 2012-08-07 CN CN 201220403170 patent/CN202711902U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20150807 |
|
| EXPY | Termination of patent right or utility model |