CN2901524Y

CN2901524Y - Variable magnetic flux series and parallel regulating capacity transformer

Info

Publication number: CN2901524Y
Application number: CN 200620070668
Authority: CN
Inventors: 戴一阳; 任广宇
Original assignee: China Electric Equipment Group Co Ltd
Current assignee: China Electric Equipment Group Co Ltd
Priority date: 2006-03-28
Filing date: 2006-03-28
Publication date: 2007-05-16
Anticipated expiration: 2016-03-28

Abstract

The utility model relates to a variable flux series-parallel connection capacity regulating transformer belonging to the power transformer technical field, which comprises three-phase primary windings and three-phase secondary windings. The transformer is characterized in that the primary winding and the secondary winding of each phase are divided into at least two sections, meanwhile the primary winding and the secondary winding are all provided with tapping switches, each section of the primary and secondary windings is connected with the tapping switch. Every section of the primary and secondary windings of every phase are connected in parallel on one station of the tapping switch, and every section of the primary and secondary windings of every phase are connected in series on another station of the tapping switch. The utility model is capable of operating in different connection modes according to different loads, and has a low open circuit loss when operating with a low load.

Description

Become magnetic flux rope parallel capacity regulating transformer

Technical field

The utility model belongs to the power transformer technical field, relates to a kind of change magnetic flux rope parallel capacity regulating transformer.

Background technology

Power transformer is as long as insert electrical network, even also produce certain loss under the big no-load condition, i.e. and no-load loss.The no-load loss of common power transformer is not change with the size variation of load, thereby can a large amount of electric energy of waste in transformer whole service lifetime.In order to reduce no-load loss, the general practice of prior art is to increase material consumption or use the high-quality expensive material.The former can not reduce no-load loss significantly, though the latter can reduce no-load loss significantly, because the benefit that reduces the wastage is not enough to remedy the increase of material cost, therefore except special purpose, is restricted in general practical application.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of can the operation with the different modes of connection under different loads, have the change magnetic flux rope parallel capacity regulating transformer of low no-load loss when hanging down load running.

Change magnetic flux rope parallel capacity regulating transformer of the present utility model includes winding of three-phase and three-phase secondary winding, it is characterized in that, winding of each phase and secondary winding are divided into two sections at least, while winding and secondary winding are provided with shunting switch, and each section of first and second winding all is connected with shunting switch; On a station of shunting switch, each is each section parallel connection respectively of first and second winding mutually; On another station of shunting switch, each section of each phase first and second winding connected respectively.

The utility model moves transformer by changing wiring by different wiring under different loads, transformer may operate under the low magnetic flux density state when hanging down load, may operate at during high capacity under the normal magnetic flux flux density state.By the variation of magnetic flux density, the utility model can be reduced in the no-load loss when hanging down load running greatly, has reduced energy waste.The utility model is applicable to the power transformer of various connection groups, each electric pressure, various voltage regulating mode, different capabilities.

Description of drawings

Fig. 1 a is the utility model at each line assumption diagram when each section is in parallel in winding mutually;

Fig. 1 b is the line assumption diagram of the utility model when each section is in parallel in each phase secondary winding;

Fig. 2 a is the utility model at each line assumption diagram when each section is in series in winding mutually;

Fig. 2 a is the line assumption diagram of the utility model when each section is in series in each phase secondary winding;

Embodiment

Shown in Fig. 1 a and Fig. 2 a, each of a winding of this transformer is divided into two sections mutually, and promptly A is divided into A1X1 and A2X2 mutually, and B is divided into B1Y1 and B2Y2 mutually, and C is divided into C1Z1 and C2Z2 mutually.Shown in Fig. 1 b and Fig. 2 b, each of the secondary winding of this transformer also is divided into two sections mutually, and promptly a is divided into a1 * 1 and a2 * 2 mutually, and b is divided into b1y1 and b2y2 mutually, and C is divided into c1z1 and c2z2 mutually.

On first station of reversing switch, shown in Fig. 1 a and Fig. 1 b, each two sections winding in mutually is in parallel, and this moment, the transformer number of turn was few, was applicable to big capacity condition of work; On second station of reversing switch, shown in Fig. 2 a and Fig. 2 b, each two sections winding in mutually is in series, and this moment, the transformer number of turn was many, was applicable to the low capacity condition of work.A winding of transformer is axially two splitted construction, and secondary winding is the twin coil single coil configuration, the two-part structure symmetry of two divisions, and all insulation, electric parameter is identical.For the short-circuit impedance voltage under two capacity status that guarantee transformer is consistent, the ratio of two capacity can be designed to 4: 1.Because 1/4 the when rated capacity during series operation be in parallel, the base value that calculates rated impedance is equal, so the short-circuit impedance percentage value equates with parallel running short-circuit impedance percentage value during series operation.

Claims

1, a kind of change magnetic flux rope parallel capacity regulating transformer includes winding of three-phase and three-phase secondary winding, it is characterized in that: winding of each phase and secondary winding are divided into two sections at least, while winding and secondary winding are provided with shunting switch, and each section of first and second winding all is connected with shunting switch; On a station of shunting switch, each is each section parallel connection respectively of first and second winding mutually; On another station of shunting switch, each section of each phase first and second winding connected respectively.