Alternating current bus electronic control system of electric workover rig

Abstract

The invention provides an alternating current bus electronic control system of an electric workover rig. The alternating current bus electronic control system comprises an energy storing battery, a bidirectional direct current / direct current (DC / DC) converter, a pulse-width modulation (PWM) grid-tied current converter, a super capacitor, a one-way DC / DC converter, a frequency converter, measuring units, a controller and other loads of the workover rig. A first measuring unit sends a measured parameter signal on a first direct current bus to a controller and performs charge control, discharge control and protection control to the energy storing battery through sampling inspection. A second measuring unit sends a measured parameter signal on a second direct current bus to the controller, distributes energy on the second direct current bus through sampling inspection and performs protection control to a frequency converter. The controller is respectively connected with the DC / DC converter, the PWM grid-tied current converter, the one-way DC / DC converter, the measuring units and the frequency converter and controls operation of parts. By means of the alternating current bus electronic control system, the existing problems including harmonic waves, load power optimal coordination and distribution, energy feedback, impact of the energy storing battery, starting current impact of an electric motor and the like can be solved.

Description

technical field [0001] The invention relates to oil field operation equipment, in particular to an AC bus electric control system of an electric workover machine. Background technique [0002] The workover rig is a specialized mechanical equipment for maintenance of downhole pipe strings or wellbore in oil fields, and is mainly used for lifting and lowering oil pipes, sucker rods and pumps. At present, the diesel engine is the main source of power for the workover rig operation. Diesel workover rigs are increasingly unsatisfactory due to the following disadvantages: [0003] (1) With the continuous rise of diesel prices, the cost of workover operations has been greatly increased; [0004] (2) The combustion of diesel oil will produce a large amount of harmful gas and cause environmental pollution, which is neither in line with the national industrial policy of energy conservation and emission reduction, nor in line with the requirements of environmental protection; [000...

AI Technical Summary

Problems solved by technology

[0020] The embodiment of the present invention provides an AC bus electric control system of an electric workover rig to solve the technical problems existing in the electric control system of an electric workover rig in the prior art

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