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A three-phase transformer single-phase power supply system

A power supply system and transformer technology, applied in the field of transformers, can solve problems such as small capacity, unbalanced three-phase power system, and collapse of the three-phase system, and achieve the effects of reducing losses, stabilizing the three-phase power supply system, and avoiding imbalance

Active Publication Date: 2018-07-27
北海银河生物产业投资股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Single-phase power generally has a small capacity, and sometimes cannot meet the capacity requirements;
[0004] 2. Since the power system is a three-phase system, when a large-capacity single-phase power is used, if the single-phase power capacity is too large, it will cause an imbalance in the three-phase power system, resulting in the collapse of the three-phase system; especially when testing is required For the related technical data of the load (such as the contact resistance of the switch, etc.), in order to simulate the working state of the load, the load must be repeatedly powered on and off. At this time, the imbalance of the three-phase power system will be repeatedly caused, resulting in the destruction of

Method used

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  • A three-phase transformer single-phase power supply system
  • A three-phase transformer single-phase power supply system
  • A three-phase transformer single-phase power supply system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A three-phase transformer single-phase power supply system, including the A, B, and C three-phase high-voltage windings LA, LB and LC of the transformer. The single-phase power supply system also includes an independent current-limiting reactor LG, a three-phase switch K1, and a single-phase switch K2 and the sliding selector switch Kra, the three-phase high-voltage winding has two taps for each phase of the high-voltage winding to connect with the two fixed contacts of the three-phase switch K1 corresponding to the phase switch, namely:

[0027] The taps A1 and A2 of the A-phase high-voltage winding LA are respectively connected to the two fixed contacts of the A-phase sub-switch K1a of the three-phase switch K1;

[0028] The taps B1 and B2 of the B-phase high-voltage winding LB are respectively connected to the two fixed contacts of the B-phase sub-switch K1b of the three-phase switch K1;

[0029] The taps C1 and C2 of the C-phase high-voltage winding LC are respectively con...

Embodiment 2

[0037] A three-phase transformer single-phase power supply system (see attached image 3 ), its structure is basically the same as the first embodiment, including the three-phase high-voltage windings of transformers A, B, C, independent current-limiting reactor LG, three-phase switch K1, single-phase switch K2, and sliding selection switch Kra;

[0038] The difference is that only one load is supplied with power, and the load R can be connected between the first contact 1 and the second contact 2 (or between the third contact 3 and the fourth contact 4) at the output end. The movable strap of the selector Kra is fixed on the second contact and the third contact 3 to realize uninterrupted and continuous power transmission to the load R.

[0039] When the load R is connected between the first contact 1 and the second contact 2 of the output terminal, the load R works between the low voltage A and B phases, and the C phase has no current, but there is an independent current-limiting r...

Embodiment 3

[0042] A three-phase transformer single-phase power supply system (see attached Figure 4 ), its structure is basically the same as the first embodiment, including the three-phase high-voltage windings of transformers A, B, C, independent current-limiting reactor LG, three-phase switch K1, single-phase switch K2, and sliding selection switch Kra;

[0043] The difference is that the load is connected between the first contact 1 and the second contact 2 at the output end and between the third contact 3 and the fourth contact 4 during application, that is, the first contact at the output end Load R1 is connected between 1 and the second contact 2, and load R2 is connected between the third contact 3 and the fourth contact 4. R1 and R2 can be the same load or different loads. Slide the selector switch Kra The movable strap is fixed on the second contact 2 and the third contact 3 to achieve the purpose of supplying low-voltage single-phase electricity to two loads at the same time.

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Abstract

The invention relates to a single-phase power supply system of a three-phase transformer. The single-phase power supply system is connected to the low-voltage output end of the transformer through tapping on a three-phase high voltage winding, and through a three-phase switch K1 and a single-phase switch as well as an independent current limiting reactor and a slide selector switch, and a single-phase output formed by contacts of the slide selector switch is provided for a user, so that the three-phase transformer can output single-phase power, and can limit single-phase load current by adjusting the reactance with the independent current limiting reactor arranged in a B phase when the load uses single-phase power, especially when the load is repeatedly powered on or off for detecting the related technical data of the test load or simulating the working state of the load. Due to the symmetry of single-phase low voltage, current and reactance output by the three-phase transformer, the system stability of the three-phase power supply system while using a single phase is ensured, the system loss is reduced, and the efficiency and reliability of the system are improved. The single-phase power supply system has two single-phase output voltage ends which can work at the same time, can also work alone, and do not affect each other.

Description

Technical field [0001] The invention relates to a transformer, in particular to a three-phase transformer single-phase power supply system. Background technique [0002] The commutating transformer system currently usually uses a single-phase transformer to step down and output the required voltage and current; the problems are: [0003] 1. The general capacity of single-phase power is small, and sometimes it cannot meet the capacity requirements; [0004] 2. Since the power system is a three-phase system, when large-capacity single-phase power is used, if the single-phase power capacity is too large, it will cause the three-phase power system to be unbalanced and cause the three-phase system to collapse; especially when testing is required When the related technical data of the load (such as the contact resistance of the switch, etc.), in order to simulate the working state of the load, the load must be repeatedly supplied and de-energized. At this time, the unbalance of the thre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/28H01F27/29H01F27/40H01F29/02H01F29/04
CPCH01F27/28H01F27/29H01F27/40H01F29/025H01F29/04
Inventor 范韦波荣华中刘伟李武宁何祖文李挺威周莹易帅许海桃
Owner 北海银河生物产业投资股份有限公司