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直流电源的低纹波实现方法研究

发布时间:2019-05-11 00:26
【摘要】:旋转导向钻井技术是目前最具代表性的先进钻井技术,旋转导向钻井系统中的姿态测量装置对钻头钻进过程中井斜角、方位角等参数进行测量,为钻头钻进轨迹的精确控制提供基础。为了研究姿态测量参数精度的提高方法,实验中用测斜仪来模拟钻井工具,使用高精度陀螺仪和三轴加速度计组合来测量姿态参数。由于传感器输出的信号很微弱,供电电源的纹波对测量精度有很大影响,虽然本身无纹波的电池能满足实验精度需求,但电池容量有限,无法进行长时间测量。所以高精度、低纹波、稳定可靠的直流电源已成为姿态参数高精度测量研究中要解决的关键问题。论文从测斜仪姿态参数测量实验对电源稳定性、持续性和干扰等方面的需求出发,根据纹波控制技术和电力电子技术基本理论,对直流电源的低纹波实现方法进行研究,完成了旋转导向钻井工具姿态测量实验装置的供电方案设计。设计电源采用电池作为核心来充分发挥电池的无纹波特性,并采用双电池交替供电和充电结构来解决电池容量有限问题,同时利用线性电压调整电路来消除开关切换时产生的谐波,从而实现电源的低纹波输出。对设计的低纹波直流电源进行了实验验证,结果表明,设计的电源开关切换过程中输出电压无变化,可以实现长期、稳定、低纹波的电压输出。与现有的电源相比,论文设计的电源具有结构简单、输出纹波低的优势。论文研究成果对提高测斜仪的测量精度有较重要意义。
[Abstract]:Rotating steering drilling technology is the most representative advanced drilling technology at present. The attitude measuring device in rotating steering drilling system measures the well inclination angle, azimuth angle and other parameters in the drilling process of bit. It provides the basis for precise control of drilling trajectory of drill bit. In order to study the method of improving the accuracy of attitude measurement parameters, the inclinometer is used to simulate the drilling tool, and the combination of high precision gyroscope and triaxial accelerometer is used to measure the attitude parameters. Because the signal output by the sensor is very weak, the ripples of the power supply have a great influence on the measurement accuracy. Although the battery without ripples can meet the requirements of experimental accuracy, the battery capacity is limited and can not be measured for a long time. Therefore, the high precision, low grain, stable and reliable DC power supply has become the key problem to be solved in the research of high precision measurement of attitude parameters. According to the demand of stability, persistence and interference of power supply in attitude parameter measurement experiment of inclinometer, according to the basic theory of wave control technology and power electronics technology, the realization method of low grain wave of DC power supply is studied in this paper. The power supply scheme design of the attitude measurement experimental device for rotary steering drilling tool is completed. The design power supply uses the battery as the core to give full play to the non-ripple characteristics of the battery, and adopts the dual battery alternating power supply and charging structure to solve the problem of limited battery capacity. At the same time, the linear voltage adjustment circuit is used to eliminate the harmonics produced when the switch is switched, so as to realize the low wave output of the power supply. The experimental results show that the output voltage has no change in the switching process of the designed power switch, and the long-term, stable and low-notch voltage output can be realized. Compared with the existing power supply, the power supply designed in this paper has the advantages of simple structure and low output ripples. The research results of this paper are of great significance to improve the measuring accuracy of the inclinometer.
【学位授予单位】:西安石油大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TE92;TN86

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