Pumping unit automatic-control equipment capable of achieving automatic parameter adjustment without load sensor

Abstract

The invention discloses pumping unit automatic-control equipment capable of achieving automatic parameter adjustment without a load sensor. The equipment is composed of a digital control system, an automatic-control equipment box body, a voltage sensor, a current sensor and an motor driver, wherein the digital control system achieves an automatic parameter adjustment algorithm, and the motor driver has a four-quadrant operation capability; the digital control system with the automatic parameter adjustment function comprises an automatic parameter adjustment controller unit, a communication interface unit, a sensor interface unit, a visual liquid crystal display unit, a temperature detecting unit, a keyboard, a Flash storage unit and a USB storage interface unit, wherein the communication interface unit faces the motor driver running in four quadrants, the sensor interface unit faces the voltage sensor and the current sensor; the automatic parameter adjustment means that manual hand-actuated interference is not needed in an automatic-control equipment running process, and running parameters of an alternating current motor power driver are self-adaptively and proactively adjusted according to the working conditions of a pumping unit. The pumping unit automatic-control equipment capable of achieving the automatic parameter adjustment without the load sensor has the advantages of strong work adaptability, self-adaptive optimization, automatic parameter adjustment and the like.

Description

technical field [0001] The invention relates to the field of automatic control of pumping units, in particular to an automatic control device for pumping units that realizes automatic parameter adjustment without a load sensor. Background technique [0002] Petroleum is the lifeblood of the national economy. The underground oil extraction work will use the pumping unit as the oil collection and lifting device, and the driving machine of the pumping unit often uses an AC motor. The automatic control equipment of the pumping unit can realize the automatic control of the running state of the AC motor of the pumping unit according to the given conditions. In order to realize the electrical detection of the load, the traditional automatic control equipment of the pumping unit is often realized by installing a load sensor on the pumping unit. At this time, the aging and drift of the sensor will often seriously affect the accuracy of the measurement results, thereby affecting the c...

AI Technical Summary

Problems solved by technology

In order to realize the electrical detection of the load, the traditional automatic control equipment of the pumping unit is often realized by installing a load sensor on the pumping unit. At this time, the aging and drift of the sensor will often seriously affect the accuracy of the measurement results, thereby affecting the calculation and judgment based on the measurement results. reliability

When the traditional automatic control equipment of the pumping unit is used for automatic control, the setting is often single. It can neither adjust the real-time operation control parameters according to the operation of the pumping unit, nor can it automatically adjust the operation control parameters, such as: given frequency When it is a certain F1Hz, regardless of the specific working conditions of the oil well, it will always run at this F1Hz as long as it is started up. When the oil well is in the middle or late stage, it will happen that the pumping unit cannot be fully pumped or even empty for each stroke. This will increase the wear of the polished rod and the wall of the oil drum and shorten the maintenance-free period of the oil well and its equipment

When the specific working conditions of the oil well change and the operating state needs to be changed, it is often impossible to find the problem and deal with it in time, and even if it is dealt with, it often needs to be manually set, or even set by shutting down, which will cause response Untimely, inconvenient to use, waste of manpower, and even affect the normal production of the oil field

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