Rod pumped well group control system based on direct current bus

Abstract

The invention provides a rod pumped well group control system based on a direct current bus. The rod pumped well group control system based on the direct current bus comprises a transformer, a rectification filter device and a plurality of inverter terminal controllers. The transformer reduces a high-voltage power source to a 380V or middle-high voltage three-phase alternating-current power source, the rectification filter device transforms the three-phase alternating-current power source to direct current electric energy, the inverter terminal controllers transform the direct current electric energy to alternating current electric energy and supply the alternating current electric energy for multiple pumping units, and real-time monitoring and control are carried out on the running conditions of the inverter terminal controllers. The rod pumped well group control system based on the direct current bus solves the problems that existing equipment is poor in power, high in cost and the like, and has the advantages of being high in energy-saving efficiency, low in cost and capable of preventing the sharp fluctuation or overvoltage of the voltage of the direct current bus and achieving power transmission without voltage boosting for long-distance oil wells where power is supplied to multiple wells through one system.

Description

technical field [0001] The invention relates to a pumping well group control system, in particular to a pumping well group control system based on a direct current bus. Background technique [0002] At present, there are various detection and control methods for pumping units and driving motors in China. For example, for the purpose of improving the process and increasing the recovery rate, the pumping units are equipped with inverter governors and dynamometer test analysis. instrument, slip motor, pole-changing speed regulation; in view of the low efficiency and low power factor of the pumping unit due to the long-term state of "big horse-drawn trolley", the energy-saving control motor and step-down voltage are adopted in order to save energy and reduce consumption. Energy saving and Δ / Y connection control, as well as the so-called super energy saving device that realizes energy saving through intermittent control of the pumping unit, etc. The control of pumping units in f...

AI Technical Summary

Problems solved by technology

The latter is more technically difficult and more expensive

In addition, due to the different technical means adopted, the cost of the control cabinet is also different, but overall, the price of the inverter control cabinet is high, which is difficult for oil production plants to accept, which is why the inverter control cabinet is currently difficult to be widely used in large areas. main reason

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