CN85200002U

CN85200002U - A transfomer with trifilar winding used in latent oil pump and its control

Info

Publication number: CN85200002U
Application number: CN 85200002
Authority: CN
Inventors: 阎武宁
Original assignee: Tianjin Transformer Factory No2
Current assignee: Tianjin Transformer Factory No2
Priority date: 1985-04-01
Filing date: 1985-04-01
Publication date: 1985-09-10

Abstract

The utility model belongs to the improvement of a distribution transformer of electric power. The purpose of the utility model is to reduce equipment investment and line installing cost and save electric energy by using a trifilar winding transformer instead of two double winding transformers. The trifilar winding transformer comprises a high-voltage primary winding, a medium-voltage secondary winding and a low-voltage secondary winding, and three windings are arranged around an iron core column in coaxial and concentric mode. The utility model altogether comprises three feasible modes, wherein, the utility model has the optimum arrangement mode that the low-voltage winding, the high-voltage winding and the medium-voltage winding are orderly arranged outwards from the iron core column. The trifilar winding transformer can be used as the configuring equipment of a latent oil pump and a control system thereof which are imported form USA.

Description

A transfomer with trifilar winding used in latent oil pump and its control

The utility model belongs to the improvement of power distribution transformer.

Submersible electric pump and control system thereof that each elephant of present China is adopted are the product of U.S. radar company and Sheng Chuilifute company, the supply voltage of the control system of this submersible electric pump is 0.4KV, and the supply voltage of submersible electric pump itself is 1～2KV, and its power transformer is that a 0.4/1～2KV, capacity are two windings (primary winding and an auxiliary winding) transformer of 125KVA.Because the distribution voltage in each oil field of China is generally 10KV, institute thinks the normal operation that guarantees this submersible electric pump and control system thereof, except that 0.4/1～2KV, two winding transformers of original outfit, and two winding transformers that also must a 10/0.4KV of outfit.Fig. 1 is the schematic diagram of this distribution system, wherein the T1 transformer is new two winding transformers that are equipped with, and its input voltage U1 is 10KV, and output voltage U 2 is 0.4KV, its is on the one hand as the power supply of submersible electric pump control system, simultaneously again as the input voltage of submersible electric pump power transformer T2.The output voltage U 3 of T2 transformer is 1～2KV, as the submersible electric pump power supply.This distribution system of submersible electric pump has not only increased equipment investment and circuit mounting cost greatly, and has caused waste of electric energy owing to adopted two two winding transformers.

The purpose of this utility model is with reduction equipment investment and circuit mounting cost, and to save electric energy with two two winding transformers in the existing distribution system of one three winding (primary winding, two auxiliary winding) transformer replacement.

For achieving the above object, can on the basis of general two winding transformers, increase an auxiliary winding, constitute a three-winding transformer that comprises a primary winding and two auxiliary winding.The distribution system that adopts three-winding transformer as shown in Figure 2, the input voltage U1 of its mesohigh primary winding is 10KV, is the distribution voltage of each elephant of China; The output voltage U 3 of middle pressure auxiliary winding is 1～2KV, as the submersible electric pump power supply; The output voltage U 2 of low pressure auxiliary winding is 0.4KV, as submersible electric pump control system power supply.High pressure primary winding, middle pressure auxiliary winding and low pressure auxiliary winding all are wound on the same transformer fe stem stem, are coaxial concentric type winding.Consider the reasonable distribution of leakage reactance of three windings and the convenience of winding leads, three windings are around the three kinds of feasible modes that put in order of iron core column.Figure 3 shows that three windings center on the sequence arrangement that iron core column (1) is pressed low pressure winding (2), high pressure winding (3), middle pressure winding (4) from inside to outside; Figure 4 shows that the sequence arrangement that three windings are pressed high pressure winding (3), middle pressure winding (4), low pressure winding (2) from inside to outside around iron core column (1); Figure 5 shows that the sequence arrangement that three windings are still pressed high pressure winding (3), middle pressure winding (4), low pressure winding (2) from inside to outside around iron core column (1), but press in the winding (4) during low pressure winding (2) crouches, its outer rim is alignd with the outer rim of middle pressure winding (4).Through test, be the best in mode shown in Figure 3 in these three kinds of arrangement modes.In order to adapt to the requirement that the submersible electric pump supply voltage is adjusted, seven grades of no on-load shunting switch are adopted in middle pressure output; The core material of three-winding transformer is the grain orientation cold-reduced silicon sheet, and adopts 45 ° of core formulas of full mitered structure.Corrugated or tubular type fin is adopted in the oil tank of transformer cooling.

The trial run proof, performance index such as the no-load loss of this three-winding transformer and load loss have all surpassed international IEC standard, can be used as and make by U.S. radar company and Sheng Chuilifute company, be used for the submersible electric pump of each elephant of China and the matching transformer of control system thereof, and can obtain tangible economic effect.Estimate, replace original two two winding transformers can reduce about 8500 dollars of equipment investment with a three-winding transformer, and can save certain electric energy and circuit mounting cost.

Claims

1, a kind of by iron core column and be wrapped in primary winding and auxiliary winding power distribution transformer that form, that be used for oilfield submersible pump and control system thereof on the iron core column, it is characterized in that it comprises a primary winding and two auxiliary winding, three windings are around the coaxial concentric arrangement of iron core column.

2, a kind of according to the said transformer of claim 1, it is characterized in that three windings around iron core column from inside to outside by the sequence arrangement of low pressure winding, high pressure winding, middle pressure winding.

3, a kind of according to the said transformer of claim 1, it is characterized in that three windings around iron core column from inside to outside by the sequence arrangement of high pressure winding, middle pressure winding, low pressure winding.

4, a kind of according to the said transformer of claim 3, it is characterized in that the low pressure winding presses in the winding in crouching, its outer rim is alignd with the outer rim of middle pressure winding.