CN101178973A - Electric voltage adaptability electric power transformer special for electrical heating thick oil well - Google Patents

Abstract

The invention provides an adaptive power transformer of wide voltage used for an oil well of which the heavy oil is heated electrically, which including two secondary winding groups. A first secondary winding group has four groups of output terminals of three-phase voltage, so as to provide power for an electromotor of the oil well. When the transformer inputs voltage of 10kV or 6 kV, a first secondary wiring terminal is changed to meet the utilization requirement of various electromotors with rated three-phase access voltages of 380V, 660V or 1,140V.The second secondary winding group has two groups of wiring terminals of single-phase voltage, so as to provide power for a heating sucker rod of the oil well. When the transformer accesses 10kV or 6 kV, the second secondary winding group can output two groups of single-phase voltages of 900V; 600V or 540V; 360V, thus meeting the heating requirement of the oil well. By replacing the existing electric system having dual transformers for heavy oil of the oil well with the invention, transformers in eight types with two kinds of input voltages, three kinds of output voltages and two kinds of output phases is reduced to one type, thus greatly decreasing the manufacture type of transformers, improving the interchange and generality of the transformer and largely decreasing the investment and comprehensive utilization cost of the transformer.

Description

A kind of electric heating heavy oil wells electric voltage adaptability electric power transformer special for electrical heating thick

Affiliated technical field

The present invention relates to a kind of oil well special electric power transformer, particularly a kind of electric heating heavy oil wells electric voltage adaptability electric power transformer special for electrical heating thick.

Background technology

Oil-field thick-oil well is used for the heating sucker rod of pit shaft heating, what use is the single phase poaer supply power supply, therefore, on the heating sucker rod heavy oil wells, usually all dispose two transformers: one is the power transformer for the motor power supply, this transformer is generally the three-phase input voltage of 10kV or 6kV according to different electrical network situations; Its output, according to the supporting situation of the power of different regions oil well, three kinds of three-phase voltages of 380,660 or 1140V that output loading is used; Another then is the transformer for the heating sucker rod power supply, the three-phase input voltage that is input as 10kV or 6kV of this transformer, and output then is the following single-phase voltage of 600V.A kind of like this because two cover power supply configuration modes that load difference causes, owing to adopt two transformers, lay two cover power circuits, therefore, not only caused single port oil well transformer configuration capacity excessive, cause unnecessary wholesale transformer capacity expense expenditure, also will bear the loss on transmission electricity charge expenditure of two transformers simultaneously.In addition, on investment and engineering, the purchasing of two transformers, installation, maintenance management, its expense all is multiplied, thereby the transformer of giving the oil field supporting, use, maintenance and management, caused very big inconvenience, caused the buying of transformer, supporting, the cost of repairs comprehensively to rise, its economy is very bad, and the utmost point is unfavorable for the control to investment of oil field electric power and cost.

Summary of the invention

Purpose of the present invention, it is exactly weak point at above-mentioned technology, provide a kind of technical performance superior, electric good springiness, can satisfy power and heating two big function needs, the convenient special electric power transformer of on-the-spot use simultaneously by a transformer, solve supporting, the use and the interchange issues of heavy oil wells transformer in the easiest mode.

The objective of the invention is to be achieved through the following technical solutions:

A kind of electric heating heavy oil wells electric voltage adaptability electric power transformer special for electrical heating thick, its elementary winding is by maximum input line voltage 10kV design; Transformer secondary output design two cover windings: first secondary winding is the three-phase power winding that the power supply motivation is used, output 1900V design when the maximum output voltage of this winding is pressed the 10kv input, extract 3 groups of taps in the middle of winding again out, this group winding constitutes 4 actual output voltage shelves levels.When elementary winding is imported 10kV,, can obtain 380V, 660V, 1140V, 1900V fourth gear output voltage respectively by changing the binding post of the different taps of first secondary winding; When the voltage that inputs to elementary winding when electrical network is 6kV,, then can obtain 228V, 396V, 684V, 1140V fourth gear output voltage respectively by changing binding post; The second subprime winding is the single-phase heating winding that the power supply hot rod is used.When the line voltage of primary winding input was 10kV, second subprime design of Windings maximum output voltage was 900V, and the centre is extracted the tap of a 600V out, can externally export the heating voltage of 600V; When the line voltage of primary winding input was 6kV, the actual maximum output voltage of second subprime winding was 540V, and tap is output as 360V.No matter the access electrical network of transformer is 10kV or 6kV, and the load voltage that first secondary winding of transformer inserts motor is 380V, 660V or 1140V no matter, all can satisfy instructions for use; No matter second subprime winding output voltage is 900V; 600V; Still 540V inserts heating sucker rod by special-purpose Power Regulation equipment, and it is equally all exportable to satisfy down-hole heated load voltage.The present invention compares with original technology, and following technical advantage is arranged:

1. adopt a kind of electric heating heavy oil wells electric voltage adaptability electric power transformer special for electrical heating thick of the present invention, by two groups of secondary winding are set respectively at transformer, the mode of in winding, carrying out tap simultaneously, the electricity needs that transformer can conveniently provide the output of the different numbers of phases, different voltages to satisfy different oil well power complementary conditions, thoroughly eradicated existing oil well power transformer because of electric poor flexibility, have no alternative but carry out the supporting drawback of dual transformer.

2. adopt a kind of electric heating heavy oil wells electric voltage adaptability electric power transformer special for electrical heating thick of the present invention, substitute the supporting mode of existing dual transformer, can reduce manufacturing series, the supporting and maintenance management mode of simplification transformer of transformer, improve transformer interchangeability, reduce transformer investment and comprehensive use cost, reduce transformer capacity and take and loss on transmission electricity charge expenditure, realize the Transformer Economic operation.

Description of drawings

Describe specific embodiments of the invention in detail below in conjunction with accompanying drawing:

Accompanying drawing is a kind of technical scheme schematic diagram of electric heating heavy oil wells electric voltage adaptability electric power transformer special for electrical heating thick.

The present invention is by transformer core 1; Primary winding 2; Transformer first secondary windings 3; The transformer second subprime around Group 4; High pressure side input voltage divides line joint case 5; Low-pressure end output voltage divides line joint case 6 to form.

A, B, C are the input terminal of armature winding 2 of the present invention; 1A, 1B, 1C; 2A, 2B, 2C; 3A, 3B, 3C; 4A, 4B, 4C are respectively 4 groups of taps of transformer first secondary windings 3; When elementary winding 2 is input as respectively 10kV and 6kV During voltage, 4 groups of taps of first secondary windings 3, export respectively 380V, 660V, 1140V, 1900V fourth gear and 228V, 396V, 684V, 1140V fourth gear motor power voltage. A, c are the full voltage output end of second subprime winding 4, and b is a, c Between voltage tap. When elementary winding 2 is input as 10kV, the full voltage terminal a of second subprime winding, c output 900V voltage, Tap terminal a, b output 600V voltage; When elementary winding 2 is input as 6kV, the full voltage terminal a of second subprime winding, c Output 540V, two grades of single-phase heating power voltages of tap terminal a, b output 360V.

Embodiment

When the present invention uses in oil wells in field, when the line voltage of elementary winding 2 inputs is 10kV, on binding post A, B, C, inserted 10kV voltage; At this moment, lead-out terminal 1A, 1B, the 1C of first secondary winding 3; 2A, 2B, 2C; 3A, 3B, 3C; On 4A, 4B, the 4C, just can obtain 380V, 660V, 1140V, 1900V fourth gear output voltage respectively for selecting arbitrarily; When the line voltage of elementary winding 2 inputs is 6kV, lead-out terminal 1A, 1B, the 1C of first secondary winding 3; 2A, 2B, 2C; 3A, 3B, 3C; On 4A, 4B, the 4C, just can obtain 228V, 396V, 684V, 1140V fourth gear output voltage respectively, guarantee any supporting access of oil well 380V, 660V, 1,140 three class power-equipments for selecting arbitrarily.Meanwhile, on lead-out terminal a, the b of second subprime winding 4, the c, just can obtain following voltage output respectively: between a, c, output 900V; Between a, b, output 600V; Or between a, c, output 540V; Between a, b, two grades of output voltages of output 360V are selected arbitrarily.On-the-spot supporting need are correctly selected different binding posts according to line voltage, load voltage and the corresponding access way of transformer nameplate regulation, insert electrical network and load and get final product, and transformer uses and exchanges very simple.Replace the electric power system of existing heavy oil wells dual transformer with the present invention, can be with 8 kinds of transformers of original two class input voltages, three class output voltages and two classes output number of phases scope, be reduced to a kind, significantly reduce transformer and made kind, a series of processes such as the investment of heavy oil wells transformer, supporting, operational management have been simplified, improve the exchange and the versatility of transformer, reduced transformer investment and comprehensive use cost.

Claims (2)

1. an electric heating heavy oil wells electric voltage adaptability electric power transformer special for electrical heating thick has two secondary winding.First secondary winding has four groups of three-phase voltage lead-out terminals, for the oil well motor provides power.The second subprime winding has two groups of single-phase voltage binding posts, for the oil well heating sucker rod provides power.

2. a kind of electric heating heavy oil wells electric voltage adaptability electric power transformer special for electrical heating thick according to claim 1 is characterized in that, the present invention can directly insert 10kV or the 6kV electrical network uses.When transformer inserted the 10kV electrical network, first level binding post can be exported 380V, 660V, 1140V and 1900V fourth gear three-phase power voltage respectively, and the second subprime winding can be exported 900V respectively; Two grades of single-phase heating voltages of 600V; When transformer inserts the 6kV electrical network, can export 228V, 396V, 684V and 1140V fourth gear three-phase power voltage respectively.The second subprime winding can be exported 540V respectively; Two grades of single-phase heating voltages of 360V.