Control Theory And Methods Of Stabling Electromagnetic Torque For Rotary Steering Drilling System

Be caused by developing marine highly-displacement well, concealment reservoir and fault block reservoir, improving the economic efficiency of exploiting oil and gas field and growing trend of the oil drilling technology automation, rotary steering drilling technology raised at the historic moment. Because of foreign technology monopoly, china needed to research for the rotary steering drilling tool system autonomously. adjustable full rotary steering drilling tool is one of them; Stable platform unit is the important component of the rotary steering drilling tool. The turbine generator in the former stage provides electric energy for the stable platform, the turbine generator at last level is torque generator of the stable platform, ability to provide power and torque effectively is very important for the entire system.At first, to Power Drive for typical, on the basis of analyzing adjustable full rotary steering drilling tool’s structure and working process, basically researched electromagnetic torque of single-phase permanent magnet synchronous generator drived by the turbine at last level; As the research object of single-phase permanent magnet synchronous generator, analyzed magnetic potential, magnetic flux, induced potential, phase diagram, working principle and the influence factor of electromagnetic torque; Then combining with control theory electromagnetic torque, established the mathematical model of electromagnetism torque controller for turbine generator, analyze the influence of power factor for it importantly, and adopted technology of boost active power factor correction being controlled by mean current in current continuous mode, proposed to the electromagnetic torque control method of improving the power factor and efficiency, achieved their purpose of overcoming the torque ripple and ascending torque’s output capacity of turbine and control stability; Finally, verified torque’s control method by using MATLAB simulation technology, indicated that this control technology can achieve a goal, which consisted of overcoming the torque ripple and ascending torque’s output capacity and accused of steady performance of the turbine generator.