A self-adaptive intelligent energy-saving control method and control system for oilfield pumping units

Abstract

The invention provides an adaptive intelligent energy-saving control method for pumping units in an oil field, which includes identifying the working state of each stroke of the pumping unit, adjusting the voltage when the pumping unit is in the electric state, adjusting the frequency when the pumping unit is in the power generation state, and returning to normal Several steps such as VF curve, oilfield pumping unit self-adaptive intelligent energy-saving control system includes several modules such as controller voltage and frequency independent VF control module, voltage regulation module, frequency modulation module and return module, the present invention can realize the automatic control of pumping unit Adapt to intelligent energy-saving control, increase the running speed of the motor when the pumping unit is working in the power generation state, and return to the normal running speed when working in the electric state, so as to realize that the number of strokes is not lower than the normal number of strokes in the same time, and the unit time, The oil pumping rate per unit energy will only increase and not decrease. The original VF independent control method of the present invention can automatically reduce the output voltage and output current when no-load, and automatically store energy under power generation, so as to achieve the purpose of energy saving and can be widely used It is used in oil field pumping units, centrifuges, machine tools and other applications with two working modes of electric and power generation.

Description

technical field [0001] The invention relates to the technical field of intelligent control of oilfield pumping units, in particular to an adaptive intelligent energy-saving control method for oilfield pumping units and a control system thereof. Background technique [0002] As a country's strategic energy, oil symbolizes the strength of a country and has a very important position. At present, the most widely used oil field in my country is the four-bar pumping unit, commonly known as the donkey-head pumping unit. For the four-bar pumping unit in the oil field, it is mainly driven by asynchronous motors. There are currently two types, the first one. One is the power frequency asynchronous pumping unit, and the second is the variable frequency asynchronous pumping unit. The variable frequency asynchronous pumping unit has obvious advantages in terms of smooth start, energy saving and environmental protection, and variable frequency speed regulation can improve the oil producti...

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an adaptive intelligent energy-saving control method and control system for oil field pumping units, which can adaptively realize VF balance control, and automatically adjust the output voltage and output voltage of the controller. The output frequency enables the two to be controlled in a balanced and coordinated manner. The two can be controlled independently and coordinated, which is used to solve the problem of energy waste in the state of electric and power generation of the pumping unit in the prior art.

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