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Energy-saving control method and apparatus for asynchronous motor of walking-beam pumping unit

A beam pumping unit and asynchronous motor technology, applied in the direction of optimized efficiency control, reactive power compensation, reactive power adjustment/elimination/compensation at low load, can solve the problem of enhanced power generation effect of asynchronous motors and power factor of asynchronous motors Low, no solutions and other problems, to achieve the effect of eliminating adverse effects, achieving energy saving effects, and solving the problem of limited life

Inactive Publication Date: 2006-07-26
TANGSHAN SENJIN GASOLINEEUM EQUIP TRADE IND
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AI Technical Summary

Problems solved by technology

Since the load of the beam pumping unit is a periodic load that continuously changes with the stroke of the pumping unit, the use of fixed capacitor compensation has both advantages and disadvantages, that is, it will make the pumping unit drag asynchronously The power generation effect of the motor is enhanced, which will bring new waste of electric energy
[0007] To sum up, the problems existing in the existing beam pumping unit system mainly focus on the "inverted power generation" of the asynchronous motor and the low power factor, and there is no comprehensive and effective solution yet

Method used

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  • Energy-saving control method and apparatus for asynchronous motor of walking-beam pumping unit
  • Energy-saving control method and apparatus for asynchronous motor of walking-beam pumping unit
  • Energy-saving control method and apparatus for asynchronous motor of walking-beam pumping unit

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Embodiment Construction

[0066] figure 1 It is a flow chart of the energy-saving control method for the asynchronous motor of the beam pumping unit of the present invention, including steps:

[0067] Step 10, in the power-on running state of the asynchronous motor, the data acquisition unit collects the voltage and current instantaneous values ​​of the asynchronous motor in real time during operation, and transmits the voltage and current data to the computer controller;

[0068] Step 20, when the computer controller judges that the asynchronous motor enters the power generation state according to the voltage and current data, output a control signal to the drive unit;

[0069] Step 30, the drive unit controls the first switch assembly to cut off the connection between the asynchronous motor and the AC power supply;

[0070] Step 40, the asynchronous motor and the no-load excitation capacitor form an island power generation system, and the data acquisition unit collects the instantaneous voltage and ...

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Abstract

This invention relates to one balance beam oil drawer induction motor saving control method and its device, which comprises the following steps: A, connecting induction operation parameters; b, induction motor entering power status to switch off from electricity network; c, induction motor and hollow excitation capacitor form alone island power system to collect induction motor operation parameters; d. induction motor entering automatic status to connect the electricity net, wherein, The control device comprises induction motor and alternating power circuit first switch elements and drive unit connected to the first switch elements, computer controller and data collection unit with inductance motor is connected to one hollow excitation capacitor.

Description

technical field [0001] The invention relates to the field of petroleum exploitation machinery, in particular to an energy-saving control method and a control device for an asynchronous motor of a beam pumping unit based on an island power generation technology. Background technique [0002] Beam pumping unit (commonly known as kowtow pumping unit) is a kind of oil production machinery with large energy consumption widely used in oilfield systems, and its electricity expense accounts for more than 60% of the total expenditure of oil production system. The energy consumed by the lifting and lowering of the sucker rod's own weight can be reduced to almost zero in theory, but this is not the case in actual use. The pumping unit powered by asynchronous motor has a "strong" constant torque characteristic. When the speed of the rotor of the asynchronous motor exceeds the synchronous speed of the motor, the net torque of the crank is negative, and the asynchronous motor will become ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/02H02J3/18
CPCY02E40/30
Inventor 梁志珊
Owner TANGSHAN SENJIN GASOLINEEUM EQUIP TRADE IND
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