灯泡贯流式机组水轮机调节系统及其位移传感器的研究

发布时间：2018-05-20 22:12

本文选题：灯泡贯流式水轮机 + 调节系统仿真　；参考：《南昌工程学院》2015年硕士论文

【摘要】：近年来随着我国不断加大对中低水头水电资源的开发，灯泡贯流式水轮机得到了越来越广泛的应用。作为低水头、大流量的灯泡贯流式水轮机具有能量转化效率高、尺寸小、重量轻、空化性能好等诸多优点，是开发中低水头水电资源经济实用的理想机型。而调速器又是保障灯泡贯流式水轮机安全稳定运行的重要控制设备，因此对于灯泡贯流式水轮机调速器研究具有重要的意义。本文首先通过理论分析，建立了灯泡贯流式水轮机调节系统的数学模型，并采用MATLAB对调节系统进行了仿真分析，仿真结果同灯泡贯流式水轮机调速器现场实验作了对比分析，从而优化了仿真参数，，同时也为灯泡贯流式水轮机调速系统的研究提供了理论支持。此外，本文针对传统的水轮机调速器导叶和桨叶传感器存在着测量精度不高、响应速度慢、抗干扰能力差等不足，研究了一种基于超磁致伸缩的非接触式位移传感器，并对其工作原理和电路进行了优化设计分析。该磁致伸缩位移传感器具有测量精度高、响应速度快、抗干扰能力强且耐高温高压，将有利于解决目前调速系统的调节精度低和响应速度慢等问题。
[Abstract]:In recent years, with the increasing development of hydropower resources in China, bulb tubular turbine has been more and more widely used. As a low head, large flow bulb tubular turbine has many advantages, such as high energy conversion efficiency, small size, light weight, good cavitation performance and so on. It is an ideal model for developing low water head hydropower resources economically and practically. The governor is an important control equipment to ensure the safe and stable operation of bulb tubular turbine, so it is of great significance for the research of bulb tubular turbine governor. In this paper, the mathematical model of the regulating system of bulb tubular turbine is established by theoretical analysis, and the control system is simulated by MATLAB. The simulation results are compared with the field experiment of bulb tubular turbine governor. The simulation parameters are optimized and the theoretical support is provided for the research of bulb tubular turbine speed regulation system. In addition, a non-contact displacement sensor based on giant magnetostriction is studied in this paper, aiming at the shortcomings of traditional turbine governor guide blade and blade sensor, such as low measuring precision, slow response speed and poor anti-interference ability. The working principle and circuit are optimized and analyzed. The magnetostrictive displacement sensor has the advantages of high measuring precision, fast response speed, strong anti-interference ability and high temperature and high pressure resistance, which will help to solve the problems of low adjusting precision and slow response speed of the current speed regulating system.
【学位授予单位】：南昌工程学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TK733.8;TP212

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