Anti-pilfering electricity parameter-adjusting energy-saving device special for oil pumping unit

Abstract

The invention provides an anti-pilfering electricity parameter-adjusting energy-saving device special for an oil pumping unit. The device comprises a rectification unit, a filtration unit, a feedback unit and an inversion unit, wherein a signal input end of the rectification unit is connected with three live wires of a three-phase alternating-current power supply; a signal output end of the rectification unit is connected with a signal input end of the filtration unit; a signal output end of the filtration unit is connected with a signal input end of the feedback unit; and a signal output end of the feedback unit is connected with an electric motor. Renewable electric power is fed back to a power grid through a feedback brake unit; due to the recycled electric energy, compared with the ordinary commercial frequency converter, the device has the advantages that 15 to 25 percent of energy is saved and the heat loss is 3 percent less than that of resistance braking; the reactive loss of the system is low, and the same power circuit can be properly loaded, so that the capacity increasing cost is saved; and an input filtration device is internally arranged, noise is filtrated in the whole process, and the interference on the power grid is one quarter that of the ordinary commercial frequency converter.

Description

technical field [0001] The invention relates to a special anti-stealing power-stealing parameter adjustment energy-saving device for a pumping unit, which belongs to the technical field of pumping unit energy saving. Background technique [0002] Existing pumping units generally use frequency converters to regulate the speed of pumping units. The working state of ordinary pumping units mainly includes two processes: one is that the motor drives the mechanical equipment to move, and the pumping unit absorbs electric energy from the grid (the electric meter rotates forward). ); the other is to release energy (mechanical potential energy, downhole negative pressure, potential energy of balance weight), and the motor is driven by mechanical equipment, which is a process of generating electricity (reversal of the electric meter). The input of ordinary frequency converter is diode rectification, because the energy cannot flow in the opposite direction, this part of electric energy...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the frequency converter of the existing pumping unit consumes more energy, the present invention further provides a special anti-stealing power-stealing parameter adjustment energy-saving device for the pumping unit

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