Peak clipping and valley filling servo driving method system used in oil field oil pumping machine

Abstract

The invention discloses a peak-shaving and valley-filling servo driving method system for an oil pumping unit, which comprises a servo driver, a GPS time controller and a power frequency contactor. The precise GPS time controller can automatically output corresponding control signals to the servo driver at the start and end time of each period of peak and valley flat. After receiving the signal, the servo driver controls the output power of the pumping unit motor according to the preset parameters. The principle of parameter setting is to reduce the power output during the peak electricity price period and increase the power output during the valley electricity price period. On the premise of keeping the total output unchanged, by increasing the valley power and reducing the peak power consumption, the purpose of reducing electricity prices and electricity expenses is achieved. At the same time, this system adds a power frequency control loop, which can switch to power frequency operation in time when the servo system fails, without affecting the normal production of the oil well. The invention has the advantages of simple circuit structure, safety and reliability, low cost and good practical application value.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a peak-shaving and valley-filling servo drive method system for oil field pumping units. Background technique [0002] The peak-valley time-of-use electricity price divides the 24 hours of a day into three periods: peak, valley and flat. According to the electricity tariff standard of power supply companies, users are encouraged to implement the peak-valley electricity price, that is, within 24 hours of the day, it is divided into several time periods and the normal time period is used. The electricity price is the basic electricity price. During the peak electricity price period, the electricity price standard is 1.5 times the normal electricity price, and during the valley period, the electricity price standard is 0.5 times the normal electricity price. Therefore, after changing the proportion of electricity consumption during the peak and valley hours, the average ele...

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Problems solved by technology

[0003] At present, the energy-saving equipment widely used in oilfields includes: rare earth permanent magnet drive devices, frequency conversion speed control devices, reactive power compensation devices, etc. These devices mainly aim to save electricity by improving the power factor of the equipment, but none of them can be realized. The problem of adjusting the power consumption in the peak, valley and flat three time periods

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