CN217444207U - Ship three-phase transformer - Google Patents
Ship three-phase transformer Download PDFInfo
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- CN217444207U CN217444207U CN202221127383.5U CN202221127383U CN217444207U CN 217444207 U CN217444207 U CN 217444207U CN 202221127383 U CN202221127383 U CN 202221127383U CN 217444207 U CN217444207 U CN 217444207U
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Abstract
The utility model discloses a boats and ships three-phase transformer, include: a first single-phase transformer, a second single-phase transformer and a third single-phase transformer; a first primary terminal of the first single-phase transformer, a first primary terminal of the second single-phase transformer and a third primary terminal of the third single-phase transformer are all connected to a ship main distribution board; the primary side wiring ends of the first single-phase transformer are sequentially connected in series; a first secondary terminal of the first single-phase transformer, a first secondary terminal of the second single-phase transformer and a first secondary terminal of the third single-phase transformer are all grounded; and the second secondary terminal of the first single-phase transformer, the second secondary terminal of the second single-phase transformer, the first secondary terminal of the third single-phase transformer and the second secondary terminal of the third single-phase transformer are connected in parallel for output. The utility model discloses can still can the continuous operation when one of them transformer trouble appears, guarantee that the system power supply can not break off suddenly, improve power supply system's reliability and security.
Description
Technical Field
The utility model relates to a boats and ships electric power system field especially relates to a boats and ships three-phase transformer.
Background
The marine power transformer is mainly used for supplying power to electric equipment with voltage lower than the main power supply voltage. For example, the voltage of a conventional commercial ship three-phase three-wire insulation power system mainly adopts two electric systems of 380V, 50HZ, 440V and 60HZ, and the voltage of small-power equipment such as ship lighting systems, heaters, kitchen equipment and the like mostly uses 220V, so the voltage of the equipment such as the lighting systems and the like needs to be provided through a step-down transformer. According to the specification requirement of a marine power system, a step-down transformer for supplying power to 220V low-power equipment such as a lighting system, a heater and kitchen equipment needs to consider the problem of standby redundancy in design.
At present, the power supply modes of small-power equipment such as most ship lighting systems and the like adopt a mechanical interlocking mode that 1 is used and 1 is used for 2 three-phase three-wire insulation step-down transformers to supply power for each other in a standby mode, and the standby transformer is switched to supply power by manually operating a mechanical interlocking switch under the condition that one online power supply transformer is damaged. The 2 three-phase step-down transformers are mutually standby power supply modes, and the problems of high equipment design cost, low power supply reliability and safety, high equipment maintenance difficulty and high equipment replacement cost exist.
Therefore, at present, a three-phase transformer capable of solving the problems of high equipment design cost, low power supply reliability and safety, high equipment maintenance difficulty, high equipment replacement cost and the like of the existing ship transformer is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a boats and ships three-phase transformer to the reliability and the low technical problem of security of boats and ships three-phase transformer power supply among the solution prior art.
In order to solve the technical problem, the embodiment of the utility model provides a boats and ships three-phase transformer is provided, include: a first single-phase transformer, a second single-phase transformer and a third single-phase transformer;
the first primary terminal of the first single-phase transformer, the first primary terminal of the second single-phase transformer and the third primary terminal of the third single-phase transformer are all connected to a ship main distribution board;
a second primary terminal of the first single-phase transformer is connected with a first primary terminal of the second single-phase transformer, a second primary terminal of the second single-phase transformer is connected with a first primary terminal of a third single-phase transformer, and a second primary terminal of the third single-phase transformer is connected with a first primary terminal of the first single-phase transformer;
the first secondary terminal of the first single-phase transformer, the first secondary terminal of the second single-phase transformer and the first secondary terminal of the third single-phase transformer are all grounded;
and the second secondary terminal of the first single-phase transformer, the second secondary terminal of the second single-phase transformer, the first secondary terminal of the third single-phase transformer and the second secondary terminal of the third single-phase transformer are connected in parallel for output.
Preferably, the main distribution board of the ship is provided with a supply voltage of 480V.
Preferably, the types of cables connected to the main distribution board of the ship and connected to the first primary side terminal of the first single-phase transformer, the first primary side terminal of the second single-phase transformer and the third primary side terminal of the third single-phase transformer are all 3C 4/0 AWG.
Preferably, the cable types of the second secondary terminal of the first single-phase transformer, the second secondary terminal of the second single-phase transformer, the first secondary terminal of the third single-phase transformer and the second secondary terminal of the third single-phase transformer output in parallel are all 4C gamma 535 MCM.
Preferably, the types of cables connected among the primary sides of the first single-phase transformer, the second single-phase transformer and the third single-phase transformer are all 2 Cx 4/0 MCM.
Preferably, the types of cables connected among the secondary sides of the first single-phase transformer, the second single-phase transformer and the third single-phase transformer are all 2C x 313 MCM.
Preferably, the voltage output by the second secondary terminal of the first single-phase transformer, the second secondary terminal of the second single-phase transformer, the first secondary terminal of the third single-phase transformer, and the second secondary terminal of the third single-phase transformer in parallel is 208/120V.
Preferably, the first single-phase transformer, the second single-phase transformer and the third single-phase transformer are all provided with current transformers.
Preferably, the current transformer is connected with a ship monitoring device with an alarm device.
Compared with the prior art, the embodiment of the utility model provides a have following beneficial effect:
the technical scheme of the utility model three single phase transformers can be made up into three phase transformer and supply power, can avoid single three phase transformer can't continue work and the too high problem of cost when damaging, compare in three phase transformer, the degree of difficulty of changing and maintaining the single phase transformer of trouble is lower, and three single phase transformer are when one of them transformer trouble appears, remaining two single phase transformer still can continuous work, guarantee system's power supply can not break off suddenly, power supply system's reliability and security have been improved, be favorable to the long-term operation of boats and ships navigation work.
Drawings
FIG. 1: the embodiment of the utility model provides a structure schematic diagram of a ship three-phase transformer;
FIG. 2: the embodiment of the utility model provides a three-phase transformer of a ship, wherein three single-phase transformers are combined into a three-phase transformer internal wiring diagram;
FIG. 3: the embodiment of the utility model provides an installation and connection diagram of a single-phase transformer in a three-phase transformer of a ship;
wherein, the reference numbers of the description drawings are as follows:
a first single-phase transformer 001, a second single-phase transformer 002, and a third single-phase transformer 003.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
Referring to fig. 1, a three-phase transformer for a ship according to an embodiment of the present invention includes: a first single-phase transformer 001, a second single-phase transformer 002, and a third single-phase transformer 003; a first primary terminal of the first single-phase transformer 001, a first primary terminal of the second single-phase transformer 002 and a third primary terminal of the third single-phase transformer 003 are all connected to a ship main distribution board; a second primary terminal of the first single-phase transformer 001 is connected with a first primary terminal of the second single-phase transformer 002, a second primary terminal of the second single-phase transformer 002 is connected with a first primary terminal of the third single-phase transformer 003, and a second primary terminal of the third single-phase transformer 003 is connected with a first primary terminal of the first single-phase transformer 001; a first secondary terminal of the first single-phase transformer 001, a first secondary terminal of the second single-phase transformer 002, and a first secondary terminal of the third single-phase transformer 003 are all grounded; the second secondary terminal of the first single-phase transformer 001, the second secondary terminal of the second single-phase transformer 002, the first secondary terminal of the third single-phase transformer 003, and the second secondary terminal of the third single-phase transformer 003 are output in parallel.
As a preferable scheme of this embodiment, the supply voltage of the ship main distribution board is 480V.
In a preferred embodiment of the present invention, the voltage output by the second secondary terminal of the first single-phase transformer 001, the second secondary terminal of the second single-phase transformer 002, the first secondary terminal of the third single-phase transformer 003, and the second secondary terminal of the third single-phase transformer 003 in parallel is 208/120V.
In this embodiment, three single-phase transformers are combined into a three-phase transformer, and primary windings of the three single-phase transformers are connected end to form a triangular (Δ) connection mode, which is used for supplying power to a primary 480V line voltage of the three-phase transformer. The secondary windings of the three single-phase transformers adopt a star (Y) connection mode, neutral points are connected in a star mode and grounded, a three-phase four-wire system is formed, secondary voltage reduction of the three-phase transformers is 208V/120V power supply, and combination of 480V voltage reduction and 208V (line voltage) and 120V (phase voltage) three-phase transformers is achieved through delta-Y type wiring modes of primary and secondary wiring terminals of the single-phase transformers. It should be noted that 3-order harmonics of exciting current exist in a high-voltage side winding of the transformer, and the winding wiring adopts a delta connection method to ensure that the 3-order harmonic current forms a circulating current in a delta, so that the 3-order harmonics are eliminated, a large amount of harmonics are prevented from being transmitted to a system to cause voltage waveform distortion of a power grid, and meanwhile, the 3-order harmonics are prevented from entering a low-voltage side of the transformer, and harmonic current causes damage to electric equipment.
As a preferred solution of this embodiment, the types of cables connected to the ship main distribution board at the first primary terminal of the first single-phase transformer 001, the first primary terminal of the second single-phase transformer 002, and the third primary terminal of the third single-phase transformer 003 are all 3C x 4/0 AWG.
As a preferable aspect of the present embodiment, the types of cables connected in parallel and output from the second secondary terminal of the first single-phase transformer 001, the second secondary terminal of the second single-phase transformer 002, the first secondary terminal of the third single-phase transformer 003, and the second secondary terminal of the third single-phase transformer 003 are all 4C x 535 MCM.
As a preferred scheme of this embodiment, the types of cables connected between the primary sides of the first single-phase transformer 001, the second single-phase transformer 002 and the third single-phase transformer 003 are all 2C gamma 4/0 MCM.
As a preferable scheme of the present embodiment, the types of cables connected between the secondary sides of the first single-phase transformer 001, the second single-phase transformer 002, and the third single-phase transformer 003 are all 2C x 313 MCM.
It should be noted that the input cable type of the bus bar power supply of the 480V main distribution board of the ship is 3C x 4/0AWG, and the total current carrying capacity of the two cables is 504A; two cables output to the lighting distribution board from the secondary winding of the transformer are 4C x 535MCM 535, and the total current carrying capacity of the two cables is 411A.
As a preferable aspect of this embodiment, current transformers are respectively installed and connected to the first single-phase transformer 001, the second single-phase transformer 002, and the third single-phase transformer 003.
As a preferable scheme of the embodiment, the current transformer is connected with a ship monitoring device with an alarm device.
It should be noted that a single-phase current transformer can be installed in the single-phase transformer, each phase current can be monitored when the transformer works, when the single-phase transformer fails, the current transformer can trigger the ship monitoring equipment to give an alarm, the single-phase transformer failure of a crew is provided, and the failed single-phase transformer can be replaced under the condition that the ship equipment system ensures safety and does not need to operate. The current transformer triggers the ship monitoring equipment to alarm is the existing technical scheme, and the improvement on the method is not provided.
The above embodiment is implemented, and has the following effects:
the technical scheme of the utility model can make up into three single phase transformers and supply power into three phase transformer, can avoid single three phase transformer can't continue work and the too high problem of cost when damaging, compare in three phase transformer, the degree of difficulty of changing and maintaining the single phase transformer of trouble is lower, and three single phase transformer are when one of them transformer trouble appears, remaining two single phase transformer still can continuous work, guarantee system's power supply can not break off suddenly, power supply system's reliability and security have been improved, current transformer can monitor and report to the police the single phase transformer of trouble simultaneously, be favorable to the long-term operation of boats and ships navigation work.
Example two
Please refer to fig. 2, which is a diagram of internal wiring of a three-phase transformer combined by three single-phase transformers according to another embodiment. Each primary winding of the single-phase transformer is provided with two primary terminals H1 and H2, the secondary side is provided with two secondary terminals X1 and X4, corresponding cables are connected to the corresponding terminals of the winding of the single-phase transformer, and the requirements of delta-Y wiring and power supply voltage reduction are met. Illustratively, three primary windings of the single-phase transformer are connected end to form a triangular (delta) connection mode, and the triangular (delta) connection mode is used for supplying power to a primary 480V line voltage of the three-phase transformer. The secondary windings of the three single-phase transformers adopt a star (Y) connection mode, neutral points are connected in a star mode and grounded, a three-phase four-wire system is formed, the secondary voltage of the three-phase transformers is reduced to supply power for two power systems of 208V/120V, and the three-phase transformers which are combined into 480V voltage reduction and 208V (line voltage) and 120V (phase voltage) are achieved through the delta-Y connection mode of the primary windings and the secondary windings of the single-phase transformers shown in the figure 2.
Referring to fig. 3, which is a connection diagram of a single-phase transformer, in practical application, a power station of a project ship is a 480V, 60HZ, three-phase three-wire insulation power supply system, and a lighting system adopts a three-phase four-wire system, there are two power systems of 208V/120V, 120V is used for supplying power to lighting lamps, and 208V is used for supplying power to sockets at a machinery place. According to the result of the transformer capacity calculation book, the capacity required by the lighting system step-down transformer is 200KVA, the power supply mode adopts the combination of 3 single-phase transformers with the capacity of 120KVA to form a three-phase step-down (480V is reduced to 208V/120V) transformer with the total capacity of 360KVA, and in addition, 1 120KVA single-phase transformer is used as a standby mode so as to be convenient for ship workers to manually replace the single-phase transformer when the single-phase transformer fails.
Through the above-mentioned single-phase transformer combination that adopts 3 capacities to be 120KVA for total capacity is 360 KVA's three-phase step-down (480V falls to 208V/120V) transformer, 1 platform 120KVA single-phase transformer is as reserve power supply mode in addition, including single-phase transformer's the installation of arranging, sealed cable packing box on the box, the setting of cable duct, and the cable connection of internal terminal etc, the combination and the step-down power supply of single-phase transformer combination for three-phase transformer have been realized, step-down equipment design cost has been realized, the reliability and the security of power supply are improved, reduce equipment maintenance degree of difficulty and equipment replacement cost.
As shown by the delta connection of the primary winding of the transformer in fig. 2, X can be connected to the H1 terminal of the first single-phase transformer or to the H2 terminal of the third single-phase transformer; similarly, Y can be connected to the H1 terminal of the second single-phase transformer or connected to the H2 terminal of the first single-phase transformer; similarly, Z can be connected to the H1 terminal of the third single-wire transformer or connected to the H2 terminal of the second single-phase transformer. As described above, X, Y, Z can be connected to the H2 terminals of the third single-phase transformer, the first single-phase transformer and the second single-phase transformer in sequence; or H1 connected to the first single-phase transformer, the second single-phase transformer and the third single-phase transformer in sequence. Generally, delta-shaped connection windings of a three-phase transformer are connected in an end-to-end connection mode, so that the connection mode that the connection is sequentially connected to the H1 ends of a first single-phase transformer, a second single-phase transformer and a third single-phase transformer is a standard connection mode. The Y-connection (neutral point grounding) of the secondary winding of the transformer shown in FIG. 2 is as follows: the A terminal can be connected to the X4 terminal or the X2 terminal of the first single-phase transformer; the terminal B can be connected to the X4 terminal or the X2 terminal of the second single-phase transformer; the terminal C can be connected to the X4 terminal or the X2 terminal of the third single-phase transformer; the N end can be connected to the X1 terminal or the X3 terminal of each single-phase transformer, and in order to ensure the uniformity and standardization of the connection, A, B, C can be adopted to be uniformly connected to the X4 terminal or the X2 terminal of each single-phase transformer; n are uniformly connected to the X1 end or the X3 end of each single-phase transformer to be grounded, and the wiring method shown in figure 2 is one of uniform and standardized connections.
Two input cables BA-3 PA/BA-3 PB which are supplied with power from a 480V main distribution board busbar of a primary winding of the transformer, the model of the cable is 3C x 4/0AWG, and the total current carrying capacity of the two cables is 504A; two cables BA-3 SA/BA-3 SB output to the lighting distribution board from the secondary winding of the transformer are provided, the model of the cable is 4C x 535MCM, and the total current carrying capacity of the two cables is 411A. The primary winding of the transformer realizes internal connection cables of a delta connection method as shown in fig. 2, the cable model is 2C x 4/0MCM, and 3 cables are provided in total; the secondary winding of the transformer is connected with cables in a Y connection mode as shown in figure 2, the cable model is 2C x 313MCM, and the total number of the cables is 2.
The above embodiment is implemented, and has the following effects:
the embodiment of the utility model provides a can be under the concrete operation scene of boats and ships, connect three single phase transformer, and guarantee a reserve single phase transformer in the transformer case, thereby guarantee that the staff can change boats and ships fault transformer rapidly, furthermore, when the three-phase transformer that single phase transformer makes up in this embodiment can guarantee that single phase transformer breaks down, still can guarantee the normal operating of boats and ships work, and when being unlikely to single three-phase transformer to damage, can't carry out the vary voltage power supply for boats and ships.
The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention. It should be understood that any modification, equivalent replacement, or improvement made by those skilled in the art without departing from the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A marine vessel three-phase transformer, comprising: a first single-phase transformer, a second single-phase transformer and a third single-phase transformer;
the first primary terminal of the first single-phase transformer, the first primary terminal of the second single-phase transformer and the third primary terminal of the third single-phase transformer are all connected to a ship main distribution board;
a second primary terminal of the first single-phase transformer is connected with a first primary terminal of the second single-phase transformer, a second primary terminal of the second single-phase transformer is connected with a first primary terminal of a third single-phase transformer, and a second primary terminal of the third single-phase transformer is connected with a first primary terminal of the first single-phase transformer;
the first secondary terminal of the first single-phase transformer, the first secondary terminal of the second single-phase transformer and the first secondary terminal of the third single-phase transformer are all grounded;
and the second secondary terminal of the first single-phase transformer, the second secondary terminal of the second single-phase transformer, the first secondary terminal of the third single-phase transformer and the second secondary terminal of the third single-phase transformer are connected in parallel for output.
2. The marine vessel three-phase transformer of claim 1, wherein the marine vessel main switchboard supply voltage is 480V.
3. The marine vessel three-phase transformer of claim 1, wherein the types of cables connected to the main distribution board of the marine vessel at the first primary terminal of the first single-phase transformer, the first primary terminal of the second single-phase transformer and the third primary terminal of the third single-phase transformer are all 3C x 4/0 AWG.
4. The marine three-phase transformer of claim 1, wherein the cable types of the second secondary terminal of the first single-phase transformer, the second secondary terminal of the second single-phase transformer, the first secondary terminal of the third single-phase transformer and the second secondary terminal of the third single-phase transformer output in parallel are all 4C gamma 535 MCM.
5. The marine three-phase transformer of claim 1, wherein the types of cables connected between the primary sides of the first, second and third single-phase transformers are each 2C x 4/0 MCM.
6. The marine three-phase transformer of claim 1, wherein the types of cables connected between the secondary sides of the first, second and third single-phase transformers are each 2C x 313 MCM.
7. The marine three-phase transformer of claim 1, wherein the voltage output by the second secondary terminal of the first single-phase transformer, the second secondary terminal of the second single-phase transformer, the first secondary terminal of the third single-phase transformer and the second secondary terminal of the third single-phase transformer in parallel is 208/120V.
8. The marine three-phase transformer of claim 1, wherein a current transformer is installed and connected to each of the first single-phase transformer, the second single-phase transformer and the third single-phase transformer.
9. The marine vessel three-phase transformer of claim 8, wherein the current transformer is connected to a marine vessel monitoring facility having an alarm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221127383.5U CN217444207U (en) | 2022-05-11 | 2022-05-11 | Ship three-phase transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221127383.5U CN217444207U (en) | 2022-05-11 | 2022-05-11 | Ship three-phase transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217444207U true CN217444207U (en) | 2022-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221127383.5U Active CN217444207U (en) | 2022-05-11 | 2022-05-11 | Ship three-phase transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217444207U (en) |
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- 2022-05-11 CN CN202221127383.5U patent/CN217444207U/en active Active
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