CN2462522Y

CN2462522Y - Loaded voltage and capacity regulatable transformer for oil field

Info

Publication number: CN2462522Y
Application number: CN 01211522
Authority: CN
Inventors: 刘文里; 冯玉琦; 刘增
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-23
Filing date: 2001-01-23
Publication date: 2001-11-28
Anticipated expiration: 2011-01-23

Abstract

The utility model relates to an on-load voltage regulating and capacitance regulating transformer for an oil field, which is provided with an iron core. The iron core is provided with a primary winding with a plurality of taps and a secondary winding with the fixed number of turns; the primary winding is provided with an on-load tap changer and an automatic controller which is in operation after connected with working current of a motor. In the novel device, under the condition that a primary network voltage is not changed, the number of turns of the primary winding is adjusted through the on-load tap changer to enable the magnetic induction intensity of the iron core to be changed, the output voltage and the output capacity of the secondary winding can be changed along with the change of the load of a pumping unit, and the purpose of the energy saving of the transformer and the motor can be reached. The utility model can be widely used as an on-load voltage regulating and capacitance regulating transformer for the power supply of motors of various pumping units.

Description

Oil field on-load voltage regulation capacitance-adjustable transformer

The utility model relates to transformer, particularly the on-load voltage regulation capacitance-adjustable transformer of the power supply of the motor on oil-field oil pumper usefulness.

Present widely used on-load tap-changing transformer, its effect is to guarantee when fluctuation takes place original edge voltage, the variation that guarantees the output voltage of secondary is limited near the allowed band of rated value, in the number of turn on limit, this transformer Central Plains with the liter of original edge voltage or fall and increase or reduce, basically guarantee that the magnetic track in the iron core is constant, and make the output voltage of secondary guarantee constant substantially.And the employed beam pumping unit in each oil field needs bigger torque when starting at present, its used motor all will satisfy detent torque and dispose, after taking out that being started by machine finishes and entering operate as normal, the required torque of oil pumper only is about 15～20% of the required torque of startup, motor when being operate as normal on the oil pumper is only exported about 30～40% of its rated power, make motor be in the running status of low load with strong power for a long time, cause the having of motor, reactive loss to increase, power factor descends, and addressing this problem becomes urgent need.

Task of the present utility model is: overcome the deficiencies in the prior art, design a kind of under the constant situation of former limit line voltage, the oil field on-load voltage regulation capacitance-adjustable transformer that the output voltage of secondary winding and capacity change with the variation of oil pumper load.

Task of the present utility model realizes as follows: the oil field with the on-load voltage regulation capacitance-adjustable transformer it by an iron core, the former limit winding of a plurality of taps is arranged on it, the secondary winding that the number of turn is fixing is equipped with on load tap changer and automatic controller on former limit around ancestors.

The utility model since the number of turn of former limit winding under the control of automatic controller, adjust by having to carry to disassemble to close, under the constant condition of former limit input voltage, the magnetic flux density in the iron core is changed like this, the output voltage of the fixing secondary winding of the number of turn is also changed thereupon; For the motor on the oil pumper; when its load factor less than 40～50% the time; the terminal voltage of motor is suitably reduced; the revolution of motor will can not change; the pumping efficiency that is oil pumper is constant; therefore the iron loss and the reactive power of motor will sharply descend, and have realized realizing the bi-directional energy-saving of transformer-motor under the situation of protection efficiency of the pumping unit.

Fig. 1 is a front view of the present utility model;

Fig. 2 is a circuit diagram of the present utility model;

A most preferred embodiment of the present utility model, as figure, it has an iron core 1 at the pressure regulating and capacitance regulating transformer again, the former limit winding 2 that a plurality of taps are arranged on it, the secondary winding 3 that the number of turn is fixing is equipped with on load tap changer 4 and automatic controller 5, current transformer 6 on the winding of former limit.

Claims

A kind of oil field on-load voltage regulation capacitance-adjustable transformer, it has an iron core, and the former limit winding of a plurality of taps is arranged on it, and the secondary winding that the number of turn is fixing is characterized in that: on the winding of former limit on load tap changer and automatic controller are housed.