CN2484625Y

CN2484625Y - Voltage-regulating transformer

Info

Publication number: CN2484625Y
Application number: CN 01248040
Authority: CN
Inventors: 曲鸣; 常维家; 孙殿臣; 孙传民; 张伟; 王伟; 孙洪军
Original assignee: SHENBIAN MEDIUM-SIZED TRANSFORMER Co Ltd SHENYANG
Current assignee: SHENBIAN MEDIUM-SIZED TRANSFORMER Co Ltd SHENYANG
Priority date: 2001-06-01
Filing date: 2001-06-01
Publication date: 2002-04-03
Anticipated expiration: 2011-06-01

Abstract

The utility model belongs to a voltage-regulating transformer which has a tap on the winding and does not stop the load currents, which is essentially suitable for an outsized rectiformer or transformer. The transformer consists of a primary transformer body which comprises a magnet core, a field copper, a low-tension winding, a regulating winding and so on, a series transformer body which comprises a magnet, a primary winding, a secondary winding and so on, an on-load tapping changing switch and an oil tank. The transformer is characterized in that the transformer is provided with two primary transformer bodies and two series transformer bodies in the same oil tank, and the transformers are conducted correspondingly. The utility model solves the problems of volume limit, out-of-gauge transport, large wastage, high cost, huge erection space, inconvenience and so on.

Description

A kind of voltage regulating transformer

The utility model belongs to has the tap of switching and the variable transformer of non-interrupt load electric current on winding, mainly be applicable to the rectifier transformer or the furnace transformer of high-capacity.

At present, two kinds of structures of the normal employing of the rectification of high-capacity or furnace transformer: a kind of is series voltage-regulating; Another kind is made up by two transformers.Its objective is lands vertically high voltage is rectification or the required low-voltage of electric furnace.The rectification of series voltage-regulating or the basic structure of furnace transformer are: the main transformer device body of being made up of main transformer iron core, excitation winding, low pressure winding, pressure regulation winding etc., by string become unshakable in one's determination, main transformer device body mesolow windings in series secondary winding, with main transformer device body in the string formed of the winding etc. of pressure regulation windings in series become the device body, and place a fuel tank to constitute main transformer device body, string change device body, on load tap changer etc.The rectification of this series voltage-regulating or the weak point of furnace transformer are: because when capacity is especially big, its main transformer device body and string become the device body and must increase, make its fuel tank width and highly also increase, and the width of railway transportation and highly certain limit arranged, therefore, capacity can not be especially big, is not easy to transportation.By the rectification of two transformers combination or the basic structure of furnace transformer be: rectification or furnace transformer by the step-down of a platform independent and voltage regulating transformer, a platform independent are formed, and its outside joins together.This by the rectification of two combinations or the weak point of furnace transformer: since by two separately independently transformer combination form, so the cost height, loss is big, erection space is big and inconvenient.

The purpose of this utility model is to overcome the weak point in the above-mentioned prior art, and capacity is especially big, convenience is transported, cost is low, loss is little, erection space is less and a kind of easily voltage regulating transformer and provide.

The purpose of this utility model can reach by following measure: comprise that electricity is enclosed within the main transformer device body of excitation winding on the main transformer iron core and compositions such as low pressure winding and pressure regulation winding, is enclosed within string and becomes the string that winding on the iron core and secondary winding etc. form and become device body, on load tap changer, fuel tank etc., its special character is: be built-in with two main transformer device bodies and two strings become the device bodies at a fuel tank; Its corresponding string of each phase low pressure winding in each main transformer device body becomes each homophase secondary windings in series and each formation " 8 " the font coil in the device body; In two main transformer device bodies after each homophase pressure regulation winding parallel connection, through on load tap changer and two strings become in the device body each with a winding after being in parallel each with being in series and constituting the loop; Each homophase excitation winding parallel connection.

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is the utility model device body arrangement architecture embodiment schematic diagram;

Fig. 2 is the basic mutually connection principle typical figure of a kind of embodiment of the utility model;

Fig. 3 is the phase connection schematic diagram of the another kind of embodiment of the utility model.

With reference to Fig. 1～Fig. 3, be built-in with two A, B, C three-phase main transformer device body and two a, b, c three-phase strings at a fuel tank W and become the device body.Each main transformer device body is made up of main transformer X, excitation winding G unshakable in one's determination, low pressure winding D, pressure regulation winding T etc.Each string becomes the device body and is made up of string change x unshakable in one's determination, winding y, a secondary winding e etc.Each homophase excitation winding G parallel connection in two main transformer device bodies, excitation winding can be made of high pressure winding or the basic winding of high pressure and high pressure phase shift winding; Its corresponding string of each phase low pressure winding D in each main transformer device body becomes each the homophase secondary winding e series connection in the device body, and each constitutes " 8 " font coil; Each homophase pressure regulation winding T parallel connection in two main transformer device bodies after on load tap changer K1 and two strings become in the device body each with a winding y after being in parallel each with being in series and constituting the loop.If pressure regulation winding T is by no tap part Tj and have tap part Tf to constitute, can and tap part Tf difference parallel connection be arranged with no tap part Tj after the tap of on load tap changer K1 is selected the part series connection, through the positive and negative switching part of on load tap changer K1 with in parallel after string become that a winding y is connected into the loop in the device body, or become in the device body and be connected to positive and negative diverter switch K2 again between winding y two ends with string after in parallel, as shown in Figure 3.

The utility model compared with the prior art good effect is as follows:

1, because the utility model is built-in with two main transformer device bodies and two string change device bodies at same fuel tank, Can make the width of the especially big and product of product capacity and highly do not transfinite, overcome the prior art product capacity Width and highly above the deficiency of railway transportation limit when especially big, therefore can product capacity especially big, And convenient transportation.

2, because the utility model is the overall structure of same fuel tank, overcome in the prior art by two Fuel tank consist of two separately independently transformer and connect in the outside and the loss that produces big, become The deficiencies such as this height, erection space are big, so loss is little, cost is low, erection space is little and convenient etc.

Claims

1, a kind of voltage regulating transformer, comprise by being enclosed within main transformer device body that excitation winding on the main transformer iron core and low pressure winding and pressure regulation winding etc. form, being enclosed within string and becoming the string that winding on the iron core and secondary winding etc. form and become device body, on load tap changer, fuel tank etc., it is characterized in that: be built-in with two main transformer device bodies and two string change device bodies at a fuel tank.

2, a kind of voltage regulating transformer according to claim 1 is characterized in that: its corresponding string of each the phase low pressure winding in each main transformer device body becomes each homophase secondary windings in series and each formation " 8 " the font coil in the device body.

3, a kind of voltage regulating transformer according to claim 1 and 2 is characterized in that: in two main transformer device bodies after each homophase pressure regulation winding parallel connection, through on load tap changer and two strings become in the device body each with a winding after being in parallel each with being in series and constituting the loop.

4, a kind of voltage regulating transformer according to claim 3 is characterized in that: each homophase excitation winding parallel connection.