CN209088853U - The magnetic control energy saver of pumping unit - Google Patents

Abstract

The utility model discloses a kind of magnetic control energy saver of pumping unit.By the controlled reactor for setting main winding and control winding, feedback winding composition on same iron core, controlled reactor main winding and overcurrent relay, current transformer are connected on motor main circuit, it is in parallel with main winding to bypass A.C. contactor, and control winding is connect through adjusting controller with phase voltage, feedback winding is connected through feedback controller and current transformer with the sys node of resistance R1, and shunt capacitor is distinguished also on controlled reactor main winding and motor.It can select motor economic operation voltage according to pumping unit scene practical operation situation, and motor terminal voltage is dynamically adjusted in the case where loading situation of change by magnetic feedback, reach regulation power, increase power factor, reduce motor iron loss, the electric current for reducing power supply line and line loss and reliable and energy-saving.Also there is the advantages that simple and practical in structure, loss is effectively reduced in stable working performance, and significant, the suitable industry of energy-saving effect is promoted.

Description

The magnetic control energy saver of pumping unit

Technical field

The utility model relates to a kind of energy savers, specifically, be related to it is a kind of for dragging the three of beam pumping unit Phase asynchronous motor carries out the energy saver of economize on electricity control in operation.More particularly to threephase asynchronous operation in load Size variation, low load with strong power and impact load, ventilation blower class load the energy saver controlled.

Background technique

Beam type four-bar pumping unit is the important mechanical equipment in oil field, which accounts for about the 40%- of oil field total energy consumption 50%.Static load torque is larger when it starts, its load is electric current, the power, power factor of the motor of alternation when normal work Change with the variation of sucker rod up-down stroke.To ensure to load starting, in design alternative motor, capacity is all larger, and Run back loading very little again.About 70% pumping unit Rate of average load is less than 40% at present, and operational efficiency is lower than 80%, and " big horse traction is small Vehicle " situation is extremely widespread, so as to cause power factor reduction, distribution line loss is made to increase waste electric energy.In order to solve this Problem is taken at present using frequency control, permasyn morot, super high revolution difference motor, dual-power motor, motor The power-saving technologies such as stator winding angle star conversion.Although the technology has all played good positive effect in terms of energy conservation, There are certain to cover end, and if the frequency converter of frequency control itself has about 3% power loss, the harmonic wave of frequency converter has power grid It influences, motor added losses can be made to increase；Permasyn morot does not cut down the ability of oscillating load, will increase to deceleration The impact damage of case gear, the curie point of permanent-magnet material is only at 120-130 DEG C, once burn will loss of excitation for motor；And superelevation turns Poor motor is only to have power savings in 30% or less load of underloading；Dual-power motor and the motor of angle star transformation operation are only It is capable of fixing and is converted between two power, and the mode cannot carry out dynamic according to the dynamic change of load and reconcile output work Rate.It can not reach ideal energy-saving effect.

Summary of the invention

The purpose of this utility model is to provide a kind of magnetic control energy saver of pumping unit, described device can overcome the disadvantages that existing skill Defect existing for art especially can carry out dynamic according to the dynamic change of load and reconcile output power.Thoroughly solve " big horse traction Trolley " covers disease, to reach ideal energy-saving effect.

The technical solution of the utility model is as described below: it includes AC power source, motor, air-break circuit-breaker, comprehensive guarantor Device, main A.C. contactor and bypass A.C. contactor, overcurrent relay, current transformer, capacitor are protected, is existed by setting The controlled reactor that main winding L on same iron core and control winding, feedback winding are constituted, by the main winding of controlled reactor and Overcurrent relay, current transformer are connected in motor major loop, and bypass A.C. contactor is in parallel with main winding, while will control Winding processed is connect through adjusting controller with phase voltage, and feedback winding through feedback controller with current transformer with the in parallel of resistance Node is connected, and distinguishes what shunt capacitor C1, C2 were realized also on the main winding of controlled reactor and motor.

Setting of the utility model due to taking the structure, especially controlled reactor can not only take out according to every The live practical operation situation of oil machine selects an economic operation voltage in operation, and by magnetic feedback element in operation The variation of load dynamically adjusts terminal voltage of motor in time, to reach regulation power, increase power factor, reduce motor iron Damage, the electric current and line loss for reducing power supply line, to reach energy-efficient purpose.And equipment itself is without harmonic wave, to reduction gearbox tooth Wheel has overload, overcurrent, short circuit, mutually unbalanced integrated protection without impact；And the functions such as energy conservation, bypass operation.It is saved Electric rate are as follows: active 8-22%, idle 22-70%, line loss 30-48%；Simultaneously have it is simple and practical in structure, stable working performance, Loss is effectively reduced, energy-saving effect is obvious, is suitble to the advantages that industry popularization.

Detailed description of the invention

Fig. 1 is the electrical block diagram of the utility model.

Specific embodiment

The magnetic control energy saver of the pumping unit of the utility model is the one kind invented in the production practices of oil field as shown in Figure 1 Novel energy-saving device.Its core component is controlled reactor, and the controlled reactor is the master by being arranged on same iron core Winding L and control winding L1, feedback winding L2 composition.Wherein main winding L is together with overcurrent relay GL, Current Transmit string It is associated in and existing is made of AC power source, air-break circuit-breaker QF, comprehensive protection device ZB, main A.C. contactor 1KM and motor M In motor major loop.And the bypass A.C. contactor 2KM and controlled reactor main winding L is in parallel；At the same time, also Shunt capacitor C1, C2 are distinguished at the both ends of controlled reactor main winding L and motor M；In addition to this, also by the controllable electric The control winding L1 of anti-device is connect through adjusting controller TK with phase voltage；And feedback winding L2 is mutual through feedback controller FK and electric current Sensor CT is connected with the sys node of resistance R1.The adjusting controller TK and feedback controller FK is the prior art, point Do not have static voltage (electric current) regulatory function under dynamic.Resistance R in figure₁It is shunt resistance, voltmeter V is to show electricity The end voltage of motivation M.

The starting of the utility model and energy saving adjustment process: after power turn-on, start button, main A.C. contactor are pressed 1KM and bypass A.C. contactor 2KM obtain electric actuation simultaneously, and wherein reactor is shorted by bypass contactor 2KM, and motor M is obtained entirely Voltage start (up to maximum starting torque).Bypass contactor 2KM is disconnected after reaching rated speed stable operation, controlled reactor master Winding L seals in motor major loop.Adjusting the electric current of control winding L1 again at this time reaches it to change the end voltage of motor Energy-saving run state is in economic operation voltage.It is that sucker rod is obstructed when pumping unit operation again, motor M electric current increases When, overcurrent relay GL controls contact KA and is attracted, and connects bypass A.C. contactor 2KM, still runs motor M total pressure.To event Electric current reduces after barrier elimination or start completion, and bypass contactor 2KM disconnects investment energy-saving run state again automatically.

In motor M operational process, since the mechanical periodicity electric current of load also changes therewith, pass through current transformer at this time CT is by the current feedback of variation to feedback winding L2, the variable-current dynamic regulation reactance loaded when feedback winding L2 is according to operation The reactance value of device adjusts the electric current of reactor feedback winding L2 by feedback control to reach the variation dynamic regulation according to load The purpose of the end voltage of motor M.Specifically when the electric current IM in motor major loop ↑, Current Transmit electric current also ↑, instead Present in winding L2 electric current also therewith ↑, promote the reactance value XL of controlled reactor main winding L ↓, the both ends controlled reactor main winding L Voltage UL ↓, thus make terminal voltage of motor UM ↑.When the electric current IM in motor major loop ↓, situation is with regard on the contrary.Controllable electric Anti- device main winding L both end voltage UL ↑, thus make terminal voltage of motor UM ↓.That is in the dynamic case, according to motor The reactance value of current regulation controlled reactor main winding L in major loop can reliably realize with load variation dynamic adjust it is electronic The end machine M voltage.It is automatically switched to energy-saving run again when electric current is reduced to certain value.Capacitor C1, C2 in the utility model To make up reactive power insufficient section.The utility model is widely used in the mouse-cage type threephase asynchronous of driven oil-pumping machine Energy Saving Control and the occasions such as the dragging asynchronous motor of other mechanical " low load with strong power ", impact mechanical load.

Running experiment through the 37KW pumping unit installation energy-saving actuator to two the 4th operation areas of Daqing oil field oil recovery Show: active power saving rate is 23.6 %；Idle power saving rate 24.2%；Route active loss reduced rate is 36.7%, the utility model With significant energy-saving effect.

Claims (1)

1. a kind of magnetic control energy saver of pumping unit, including AC power source, motor M, air-break circuit-breaker QF, comprehensive protection device ZB, main A.C. contactor 1KM and bypass A.C. contactor 2KM, overcurrent relay GL, Current Transmit, it is characterised in that: The controlled reactor that main winding L on same iron core and control winding L1, feedback winding L2 are constituted is set, by controlled reactor Main winding L1 and overcurrent relay GL, Current Transmit be connected in motor major loop, bypass A.C. contactor 2KM with Main winding L is in parallel, while control winding L1 being connect through adjusting controller TK with phase voltage, and feedback winding L2 is through feedback control Device FK is connected with Current Transmit with the sys node of resistance R1, also on the main winding L and motor M of controlled reactor Shunt capacitor C1, C2 respectively.