Motor driving system used for workover treatment

Abstract

The present invention discloses a motor driving system used for workover treatment. The motor driving system used for workover treatment is characterized in that a three-phase power supply is connected with a controllable rectifier via a filter circuit A, the rectification output end of the controllable rectifier is connected with a filter circuit B and a frequency converter orderly via a DC bus, and the output end of the frequency converter is connected with the power supply input end of a frequency conversion motor; a PLC is connected with the control input ends of a super capacitor controller and the controllable rectifier separately via the on-site buses, the high voltage side anode of a bidirectional DC-DC converter is connected with the rectification output end anode of the controllable rectifier, and the high voltage side cathode of the bidirectional DC-DC converter is connected with the rectification output end cathode of the controllable rectifier; the low voltage side anode of the bidirectional DC-DC converter is connected with the anode of a super capacitor module, and the low voltage side cathode of the bidirectional DC-DC converter is connected with the cathode of the super capacitor module; the signal output end of the super capacitor module is connected with the signal acquisition input end of the super capacitor controller, and the super capacitor controller is connected with the control input end of the bidirectional DC-DC converter.

Description

technical field [0001] The invention relates to the field of workover operations, in particular to a motor drive system for workover operations. Background technique [0002] At present, all types of operating machines in oil fields are generally powered by diesel engines, and the working efficiency of diesel engines is only about 50%. Not only is energy waste serious, operating costs are high, but there are also a series of environmental problems such as noise pollution. In the current environment where the country vigorously promotes clean production and implements environmental assessment, it is necessary to optimize the current drive mode of operating machines to make the operation and construction of oilfield enterprises more energy-saving and environmentally friendly. [0003] At present, electric drive operating machines are generally implemented. The electric drive working machine is a new type of working machine with an electric motor as the driving power and a mod...

AI Technical Summary

Problems solved by technology

According to on-site investigation and statistics, the ratio of workover rig lifting and lowering operation time to loading and unloading time is about 1:2, and the motor will be in no-load or low-power operation state for about 66% of the time, and the power utilization rate of the motor is low, so it is necessary to increase power compensation device

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