CN201984947U

CN201984947U - Electricity-saving transformer

Info

Publication number: CN201984947U
Application number: CN2011200237593U
Authority: CN
Inventors: 王宏官
Original assignee: Zhangjiagang Shazhou Special Transformer Manufacturing Co Ltd
Current assignee: JIANGSU TIANXIANG ENERGY SAVING SCIENCE & TECHNOLOGY CO., LTD.
Priority date: 2011-01-25
Filing date: 2011-01-25
Publication date: 2011-09-21
Anticipated expiration: 2021-01-25

Abstract

An electricity-saving transformer comprises three phases of coil windings, each phrase of coil winding comprises a first basic coil, a second basic coil and a phase shift coil positioned between the first basic coil and the second basic coil, and all coils are wound on an iron core of the phrase. The head end of each first basic coil is a voltage input end; the tail end and the head end of the phase shift coil in each phase are connected with the tail end of the first basic coil and the head end of the second basic coil on the iron core of another phrase correspondingly; and the tail ends of the second basic coils on the three phases of coil windings are connected. In the electricity-saving transformer, since each phrase of coil winding is divided into the two sections of the basic coils and the middle section of the phase shift coil, and one phase shift coil is connected with the tail end and the head end of the two basic coils of another phrase correspondingly, the balance of current and voltage among all the phrases is kept, zero sequence current is eliminated, power network transmission loss is lowered, and ineffective power borne by load is reduced.

Description

A kind of electric power saving transformer

Technical field

The utility model relates to a kind of transformer.

Background technology

In the low-voltage distribution transformer system, need to be applied to transformer.Transformer is used for that higher voltage is converted to low-voltage and exports power load to.Cause by power consumption equipment, can produce a large amount of high order harmonic components,, the electrical network quality of power supply is descended if these high order harmonic components are injected public electric wire nets in the distribution transforming system.In order to address this problem, often need the transformer in the system is carried out phase shift, with acquisition electric current and voltage balance, thereby reduce the harmonic content that injects public electric wire net.Reach power savings.At present, the most frequently used phase shift system has indentation phase shift, extend-triangle phase shift and hexagon phase shift etc., selects for use according to the difference of the mode of connection.

But the above-mentioned phase shift mode of connection, each phase current voltage can not guarantee balance, also has certain zero-sequence current, thereby when being injected in the electrical network, still can produce loss, increases the reactance capacity that load is born.

Summary of the invention

The purpose of this utility model provides a kind of transformer that keeps each phase current balance of voltage, eliminates zero-sequence current and economize on electricity.

In order to achieve the above object, the technical solution adopted in the utility model is: a kind of electric power saving transformer, comprise the three-phase coil winding, every mutually described coil windings comprises the first basic coil of winding on this phase iron core, the second basic coil, phase shift coil between the first basic coil and the second basic coil, the head end of each described first basic coil is a voltage input end, the tail of each mutually described phase shift coil, head end and another tail end of the first basic coil on the iron core and corresponding connection of head end of the second basic coil mutually, and the tail end of the basic coil of second on the three-phase coil winding is connected.

Described three-phase winding coil is respectively high pressure winding and low pressure winding.

Optimally, described transformer comprises A, B, C tri-phase iron core, and the phase shift coil tail head end on the described A phase iron core and B be the first basic coil tail end on the iron core and corresponding connection of head end of the second basic coil mutually; Phase shift coil tail head end on the described B phase iron core and C be the first basic coil tail end on the iron core and corresponding connection of head end of the second basic coil mutually; Phase shift coil tail head end on the described C phase iron core and A be the first basic coil tail end on the iron core and corresponding connection of head end of the second basic coil mutually.

Adopt technique scheme, the utlity model has following advantage: the utility model is by being divided into every phase coil winding two these coils of segment base and middle one section phase shift coil, and with phase shift coil and other mutually corresponding connections of two basic coils head and the tail, thereby can keep each phase current balance of voltage, eliminate zero-sequence current, reduce the electrical network loss, reduce the reactance capacity that load is born.

Description of drawings

Accompanying drawing 1 is the utility model electric power saving transformer winding wiring figure;

Wherein: A1, the first basic coil; A2, phase shift coil; A3, the second basic coil;

B1, the first basic coil; B2, phase shift coil; B3, the second basic coil;

C1, the first basic coil; C2, phase shift coil; C3, the second basic coil.

Embodiment

Below in conjunction with accompanying drawing, to the utility model the preferred mode of implementing be further described:

Three-phase transformer as shown in Figure 1, it comprises three iron core (not shown), the winding high-tension coil winding on iron core, in the utility model, winding on every phase iron core comprises three groups, be respectively the first basic coil, the second basic coil, the phase shift coil between the first basic coil and the second basic coil

Particularly, for A, B, C tri-phase iron core, coil comprises the first basic coil A1, phase shift coil A2, the second basic coil A3 on the A phase iron core, coil comprises the first basic coil B1, phase shift coil B2, the second basic coil B3 on the B phase iron core, and coil comprises the first basic coil C1, phase shift coil C2, the second basic coil C3 on the C phase iron core.In the present embodiment, the tail end of the phase shift coil A2 that A goes up mutually is connected with the tail end that B goes up the first basic coil B1 mutually, and the head end of phase shift coil A2 is connected with the head end that B goes up the second basic coil B3 mutually; The tail end of the phase shift coil B2 that B goes up mutually is connected with the tail end that C goes up the first basic coil C1 mutually, and the head end of phase shift coil B2 is connected with the head end that C goes up the second basic coil C3 mutually; The tail end of the phase shift coil C2 that C goes up mutually is connected with the tail end that A goes up the first basic coil A1 mutually, and the head end of phase shift coil C2 is connected with the head end that A goes up the second basic coil A3 mutually.Each first basic coil A1 that goes up mutually, the head end of the first basic coil B1, the first basic coil C1 are the three-phase voltage input, and each second basic coil A3 that goes up mutually, the tail end of the second basic coil B3, the second basic coil C3 are connected as leading-out terminal.

The above-mentioned mode of connection at be the high-tension coil of transformer, the low-voltage coil of transformer is equally according to above-mentioned this kind mode of connection, transformer according to above-mentioned coiling formation, according to the law of magnetic circuit, each phase current voltage can keep balance, has eliminated zero-sequence current, reduces the electrical network loss, reduce the reactive power that load is born, further guaranteed the stability of output voltage.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection range of the present utility model with this.The mode that the basic mutually coil of A phase shift phase coil and B is connected as adopting, B phase shift phase coil is connected with the basic mutually coil of C, C phase shift phase coil is connected with the basic mutually coil of A; all equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the present utility model.

Claims

1. electric power saving transformer, comprise the three-phase coil winding, it is characterized in that: every mutually described coil windings comprises that winding is at the first basic coil on this phase iron core, the second basic coil, phase shift coil between the first basic coil and the second basic coil, the head end of each described first basic coil is a voltage input end, the tail of each mutually described phase shift coil, head end and another tail end of the first basic coil on the iron core and corresponding connection of head end of the second basic coil mutually, and the tail end of the basic coil of second on the three-phase coil winding is connected.

2. electric power saving transformer according to claim 1 is characterized in that: described three-phase winding coil is respectively high pressure winding and low pressure winding.

3. electric power saving transformer according to claim 1 and 2, it is characterized in that: described transformer comprises A, B, C tri-phase iron core, and the phase shift coil tail head end on the described A phase iron core and B be the first basic coil tail end on the iron core and corresponding connection of head end of the second basic coil mutually; Phase shift coil tail head end on the described B phase iron core and C be the first basic coil tail end on the iron core and corresponding connection of head end of the second basic coil mutually; Phase shift coil tail head end on the described C phase iron core and A be the first basic coil tail end on the iron core and corresponding connection of head end of the second basic coil mutually.