Oil pumping unit control and heating integrated system

Abstract

The invention provides an oil pumping unit control and heating integrated system, which comprises a power supply, a public DC (Direct Current) bus, inverters, medium-frequency power supplies, a feedback unit, a PLC (Programmable Logic Controller), a man-machine interface, a sensor, oil pumping units and heating devices, wherein the power supply is connected to the public DC bus, the public DC bus is connected with the multiple inverters and the multiple medium-frequency power supplies, the inverters are connected to the multiple oil pumping units, the medium-frequency power supplies are connected to the multiple heating devices, the public DC bus is also connected to the feedback unit, the inverters and the medium-frequency power supplies are connected to the PLC respectively, and the PLC is connected to the sensors and the man-machine interface. The oil pumping unit control and heating integrated system has the beneficial effects of being capable of realizing intelligent centralized control and staggered-peak operation of the oil pumping unit, realizing energy feedback by utilizing the public DC bus and the feedback unit, improving work efficiency, adjusting length and times of stroke randomly, achieving a standby medium-frequency power supply while one medium-frequency power supply is in use as two medium-frequency power supplies are used, and heating N wells circularly according to preset heating parameters.

Description

technical field [0001] The invention relates to an integrated system for controlling and heating an oil pumping unit. Background technique [0002] The previous pumping unit control and the centralized control of electric heating rod heating had the following problems: 1) The quality of the power supply for the well group was poor and the voltage fluctuated greatly; 2) The power factor of the pumping unit was low; , When the power comes on again, several motors start at the same time, which has a large impact on the power grid; 4) The motor starts at full voltage, which generates a large starting current and starting torque, which has a large impact on mechanical equipment, reduces the life of the equipment, and increases the transformer and power grid. Power supply load; 5) Separate control of the pumping unit is not conducive to centralized operation; 6) The electric energy generated during the downstroke of the pumping unit cannot be used; 7) The operating status of the p...

AI Technical Summary

Problems solved by technology

[0002] The previous pumping unit control and the centralized control of electric heating rod heating had the following problems: 1) The quality of the power supply for the well group was poor and the voltage fluctuated greatly; 2) The power factor of the pumping unit was low; , When the power comes on again, several motors start at the same time, which has a large impact on the power grid; 4) The motor starts at full voltage, which generates a large starting current and starting torque, which has a large impact on mechanical equipment, reduces the life of the equipment, and increases the transformer and power grid. Power supply load; 5) Separate control of the pumping unit is not conducive to centralized operation; 6) The electric energy generated during the downstroke of the pumping unit cannot be used; 7) The operating status of the pumping unit cannot be displayed intuitively; 8) Each heavy oil well or high Wax wells require heating controls

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