CN209015804U - A low-voltage pre-magnetization system for a high-voltage and high-power rectifier device - Google Patents
A low-voltage pre-magnetization system for a high-voltage and high-power rectifier device Download PDFInfo
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- CN209015804U CN209015804U CN201822131872.8U CN201822131872U CN209015804U CN 209015804 U CN209015804 U CN 209015804U CN 201822131872 U CN201822131872 U CN 201822131872U CN 209015804 U CN209015804 U CN 209015804U
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- 230000005415 magnetization Effects 0.000 title claims description 12
- 238000004891 communication Methods 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 5
- 230000006837 decompression Effects 0.000 abstract description 8
- 230000005284 excitation Effects 0.000 description 17
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000005674 electromagnetic induction Effects 0.000 description 1
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Abstract
The utility model provides a kind of low pressure preliminary filling magnetic system of high-power fairing, including preliminary filling magnetic loop and control device；Preliminary filling magnetic loop includes sequentially connected pre-magnetizing power supply, low-voltage circuit breaker, the first lv contactor and decompression switching module；Control device includes slave computer and host computer, and slave computer controls low-voltage circuit breaker by circuit breaker control circuit and acts, and slave computer also controls the first lv contactor by contactor control circuit and the second lv contactor acts, slave computer and host computer communication connection；Host computer is electrically connected by contacting controling circuit with the high-voltage lead-in switch cabinet of transformer；The utility model structure is simple, and used electrical component is less, applied widely convenient for being transformed to existing transformer；It is general electronic corporation element used in the utility model, cost is relatively low compared with the switching angle for changing breaker；The utility model utilizes preliminary filling magnetic loop, can magnetize before Transformer Close for transformer, transformer is prevented to be excited damage of shoving.
Description
Technical field
The utility model relates to industrial DC experiment power supply field more particularly to a kind of high-power fairings
Low pressure preliminary filling magnetic system.
Background technique
With the development of power device, DC power supply is also rapidly developed and applies, but due to technology and at
The restriction of this etc., high-tension high-power fairing fail to be widely popularized, be commonly applied in pilot system.
Fairing contains 12 pulsating wave rectifier transformer, when transformer during no-load closing or after cut out failure, system voltage
Along with excitation surge current, (transformer is a kind of static electric appliance according to made of electromagnetic induction principle, is used for handle for meeting in recovery process
Low-voltage becomes high voltage or high voltage is become low-voltage, is the important electrical in alternating current distributing system, works as transformation
It when device closes a floodgate, is influenced by excitation voltage, very big excitation surge current may be generated)；The maximum value of excitation surge current can reach specified
7 times of electric current, and last longer, therefore how excitation surge current is reduced, it is to restrict high-power fairing to develop
Main problem.
The method that tradition reduces excitation surge current has following two:
One is the primary sides in transformer to seal in a resistance, and then increases resistance drop, reduces on transformer core
Voltage to cut down excitation surge current, while increasing a high voltage connector and the resistor coupled in parallel, when transformer magnetizes completion
Afterwards, it is acted by high voltage connector and cuts out resistance.
Another kind is the breaker closing angle for controlling transformer front end, the size and transformer front end breaker of excitation surge current
Switching angle has close connection, when switching angle is when for π, 2, does not generate excitation surge current, when switching angle is zero, excitation surge current is most
Greatly；The size and Orientation of remanent magnetism can also produce bigger effect excitation surge current simultaneously, when the magnetic flux of remanence direction and excitation surge current
When direction is consistent, magnetic action is helped, biggish excitation surge current will be generated, when the flow direction that remanence direction and excitation surge current generate
When opposite, there is demagnetizing action, so that excitation surge current becomes smaller；Therefore need to increase size and the pole of equipment calculating transformer remanent magnetism
Property, so that breaker selects a suitable combined floodgate angle to close a floodgate.
Above-mentioned magnetization method is although feasible, but all there is disadvantages, and increased equipment investment is too big, at high cost, and increases
Add size larger.
Utility model content
The purpose of this utility model is to provide a kind of low pressure preliminary filling magnetic system of high-power fairing, Neng Goutong
It crosses preliminary filling magnetic loop to magnetize for transformer, prevents from being excited damage of shoving when Transformer Close.
To achieve the goals above, the utility model uses following technical scheme:
A kind of low pressure preliminary filling magnetic system of high-power fairing, including preliminary filling magnetic loop and control device；
Preliminary filling magnetic loop includes pre-magnetizing power supply, low-voltage circuit breaker, the first lv contactor and decompression switching module；Preliminary filling
The output end in magnetoelectricity source is electrically connected with the input terminal of low-voltage circuit breaker, the output end of low-voltage circuit breaker and the first lv contactor
Input terminal electrical connection, the decompression switching module include the second lv contactor and the second switching resistance group, the first low pressure contact
The output end of device is electrically connected with the first end of the second switching resistance group, the second end of the second switching resistance group and the third of transformer
Winding electrical connection, the second lv contactor are shorted at the second switching resistance group both ends；
Control device includes slave computer and host computer, and slave computer controls low-voltage circuit breaker by circuit breaker control circuit and moves
Make, slave computer also controls the first lv contactor and the second lv contactor by contactor control circuit and acts, slave computer and
Host computer communication connection；Host computer is electrically connected by contacting controling circuit with the high-voltage lead-in switch cabinet of transformer.
The slave computer uses siemens PLC series of PLC, and the host computer uses industrial personal computer.
The slave computer and host computer pass through Ethernet or 4G module and host computer communication connection.
The decompression switching module further includes third lv contactor and third switching resistance group, the second switching resistance group
Second end is electrically connected with the first end of third switching resistance group, the second end of third switching resistance group and the primary side winding of transformer
Electrical connection, third lv contactor are shorted at third switching resistance group both ends.
The voltage rating of pre-magnetizing power supply is 380V.
A kind of low pressure preliminary filling magnetic system of high-power fairing described in the utility model, has the advantage that
1, structure is simple, and used electrical component is less, applied widely convenient for being transformed to existing transformer；
2, be general electronic corporation element used in the utility model compared with the switching angle for changing breaker, cost compared with
It is low；
3, the utility model utilizes preliminary filling magnetic loop, can magnetize before Transformer Close for transformer, prevent transformer
It is excited damage of shoving.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the principles of the present invention schematic diagram；
Fig. 2 is the schematic illustration of embodiment described in the utility model.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
The low pressure preliminary filling magnetic system of a kind of high-power fairing described in the utility model as shown in Figure 1:, including
Preliminary filling magnetic loop and control device；Preliminary filling magnetic loop includes pre-magnetizing power supply, low-voltage circuit breaker, the first lv contactor and decompression
Switching module；The output end of pre-magnetizing power supply is electrically connected with the input terminal of low-voltage circuit breaker, the output end of low-voltage circuit breaker and
The input terminal of one lv contactor is electrically connected, and the decompression switching module includes the second lv contactor and the second switching resistance
Group, the output end of the first lv contactor are electrically connected with the first end of the second switching resistance group, and the second of the second switching resistance group
End is electrically connected with the tertiary winding of transformer, and wherein the tertiary winding of transformer is that transformer is intrinsic, low outside transformer
When voltage source disconnects, low-tension supply being provided for transformer and is used, which is not described herein again, and the second lv contactor is shorted to be thrown second
Cut resistance group both ends；Control device includes slave computer and host computer, and slave computer controls low pressure open circuit by circuit breaker control circuit
Device movement, slave computer also controls the first lv contactor by contactor control circuit and the second lv contactor acts, the next
Machine and host computer communication connection；Host computer is electrically connected by contacting controling circuit with the high-voltage lead-in switch cabinet of transformer.
A kind of low pressure preliminary filling magnetic system of high-power fairing described in the utility model is returned using pre-magnetizing
Road constitutes preliminary filling magnetic loop, before Transformer Close, upper computer and lower computer control decompression switching module access pre-magnetizing is utilized to return
Road, and then increase resistance drop, the voltage reduced on transformer core prevents excitation surge current from damaging to cut down excitation surge current
Transformer.
Preferred embodiment are as follows: the slave computer uses siemens PLC series of PLC, and the host computer uses industrial personal computer；PLC
Belong to existing mature technology with industrial personal computer control breaker, contactor movement and acquisition, processing signal, is widely used to work
Industry control field, which is not described herein again.
Preferred embodiment are as follows: the slave computer and host computer pass through Ethernet or 4G module and host computer communication connection；With
Too net is wire communication mode, and 4G module is wireless communication mode, in industrial production, can independently be selected as needed, and model is adapted to
It encloses wide.
Preferred embodiment are as follows: the decompression switching module further includes third lv contactor and third switching resistance group, and second
The second end of switching resistance group is electrically connected with the first end of third switching resistance group, the second end and transformation of third switching resistance group
The primary side winding of device is electrically connected, and third lv contactor is shorted at third switching resistance group both ends；Second lv contactor and
When two switching resistance groups act, the curent change of preliminary filling magnetic loop is bigger, also bigger to the impact of preliminary filling magnetic loop, thus
Third lv contactor and third switching resistance group can be used as buffering, reduce the curent change in preliminary filling magnetic loop, in turn
Weaken the impact to preliminary filling magnetic loop.
The voltage rating of pre-magnetizing power supply is 380V.
In order to further illustrate a kind of low pressure preliminary filling magnetic system of high-power fairing described in the utility model
Technical solution, spy be further described with following embodiment:
As shown in Figure 2: the transformer is three-phase transformer, and the power supply that magnetizes is 380V three-phase alternating-current supply；
The electrical connection corresponding with three input terminals of three-phase alternating-current supply respectively of three input terminals of the low-voltage circuit breaker QF1, described the
The electrical connection corresponding with three output ends of low-voltage circuit breaker QF1 respectively of three input terminals of one lv contactor KM1, described first
Three input terminals of lv contactor KM1 are corresponding with the first end of three resistance R1, R2, R3 of the second switching resistance group electric respectively
Connection, the second end of three resistance R1, R2, R3 of the second switching resistance group three resistance with third switching resistance group respectively
The corresponding electrical connection of the first end of R4, R5, R6, the second end of three resistance R4, R5, R6 of third switching resistance group respectively with three-phase
The corresponding electrical connection of three input terminals of the tertiary winding of transformer；Three pairs of inputs of second lv contactor KM2, output end difference
It is corresponding to be shorted at the both ends of three resistance R1, R2, R3 of the second switching resistance group, three pairs of inputs of third lv contactor KM3,
Output end, which respectively corresponds, to be shorted at the both ends of three resistance R4, R5, R6 of third switching resistance group；PLC passes through breaker control
Circuit control low-voltage circuit breaker QF1 movement, PLC also control the first lv contactor KM1, second low by contactor control circuit
Tentaculum KM2 and third lv contactor KM3 movement is crimped, PLC is connected with industrial computer communication；Industrial personal computer passes through contacting controling circuit
It is electrically connected with the high-voltage lead-in switch cabinet of transformer.
The action process of above-described embodiment are as follows: industrial personal computer judges whether transformer closes a floodgate by high-voltage lead-in switch cabinet, becomes
When depressor closes a floodgate, the used PLC for communicating therewith connection of industrial personal computer first controls low-voltage circuit breaker QF1 closure, then controls first again
Lv contactor KM1 closure；After first lv contactor KM1 closure, second switching resistance group R1, R2, R3 and third switching electricity
Resistance group R4, R5, R6 access preliminary filling magnetic loop, and are magnetized by 380V three-phase alternating-current supply for transformer；Staff can shift to an earlier date
The pre-magnetizing time is written in the configuration software of industrial personal computer, after the pre-magnetizing time arrives；Industrial personal computer controls the second low pressure by PLC and connects
Tentaculum KM2 closure, second switching resistance group R1, R2, R3 is gone out from preliminary filling magnetic loop inscribe, then controls third low pressure contact again
Device KM3 closure, second switching resistance group R4, R5, R6 is gone out from preliminary filling magnetic loop inscribe, prevent the second lv contactor KM2 and
When third lv contactor KM3 is closed at, the current change quantity in preliminary filling magnetic loop is excessive, causes to rush to preliminary filling magnetic loop
It hits, preliminary filling magnetic loop is caused to damage；Industrial personal computer detects the second lv contactor KM2 and third lv contactor KM3 by PLC
It after closure, is disconnected controlling low-voltage circuit breaker QF1 by PLC, i.e. disconnection preliminary filling magnetic loop；Then industrial personal computer passes through shutting-brake control
Circuit control Transformer Close.
A kind of low pressure preliminary filling magnetic system of high-power fairing described in the utility model, has the advantage that
4, structure is simple, and used electrical component is less, applied widely convenient for being transformed to existing transformer；
5, be general electronic corporation element used in the utility model compared with the switching angle for changing breaker, cost compared with
It is low；
6, the utility model utilizes preliminary filling magnetic loop, can magnetize before Transformer Close for transformer, prevent transformer
It is excited damage of shoving.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822131872.8U CN209015804U (en) | 2018-12-19 | 2018-12-19 | A low-voltage pre-magnetization system for a high-voltage and high-power rectifier device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822131872.8U CN209015804U (en) | 2018-12-19 | 2018-12-19 | A low-voltage pre-magnetization system for a high-voltage and high-power rectifier device |
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| Publication Number | Publication Date |
|---|---|
| CN209015804U true CN209015804U (en) | 2019-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822131872.8U Active CN209015804U (en) | 2018-12-19 | 2018-12-19 | A low-voltage pre-magnetization system for a high-voltage and high-power rectifier device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2018
- 2018-12-19 CN CN201822131872.8U patent/CN209015804U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 | A low-voltage pre-magnetization system and method for high-voltage and high-power rectifier devices |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 1801 Dushan Avenue, Nanyang City, Henan Province Patentee after: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP Co.,Ltd. Country or region after: China Patentee after: WOLONG ELECTRIC GROUP Co.,Ltd. Address before: No. 1801, Dushan Avenue, Nanyang City, Henan Province Patentee before: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP Co.,Ltd. Country or region before: China Patentee before: WOLONG ELECTRIC GROUP Co.,Ltd. |
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| CP03 | Change of name, title or address |