基于矩阵变换器的瞬变电磁发射系统关键技术的研究

项目名称： 基于矩阵变换器的瞬变电磁发射系统关键技术的研究

项目编号： No.51507073

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 电工技术

项目作者： 李刚

作者单位： 吉林大学

项目金额： 21万元

中文摘要： 瞬变电磁法是一种重要的地球物理探测方法，其仪器装备的研究与开发具有重要意义。本课题采用一种新型电力电子变换器——三相-单相矩阵变换器构成瞬变电磁探测仪器的发射系统，以取代现有直流开关电源与H桥逆变器构成的常规发射系统，重点解决提高瞬变电磁发射系统功率密度、输入侧功率因数的问题。项目以基于矩阵变换器的新型瞬变电磁发射系统的关键技术为研究对象，研究基于三相-单相矩阵变换器的发射系统控制策略，包括基于分段控制与电流空间矢量相结合的调制算法，和输入侧功率因数控制方法；研究三相-单相矩阵变换器的输出电流控制技术，解决瞬变电磁发射电流波形各阶段之间的平滑过渡控制；研究发射电流纹波对瞬变电磁法探测结果的影响机理，通过在线计算输出负载的参数，结合三相-单相矩阵变换器的PWM脉宽模式计算输出电流纹波，并通过电磁响应的分析，研究消除电流纹波干扰探测结果的方法；实现一种高效可靠且结构紧凑的新型瞬变电磁发射系统。

中文关键词： 矩阵变换器；空间矢量调制；功率因数；电磁响应；瞬变电磁法

英文摘要： Transient electromagnetic method (is also called TEM) is an important geophysical exploration method. The development of the TEM instrument has great significance and research value. A novel transmitting system of TEM instrument, composed of a new type power electronic converter -- three phases to single phase matrix converter is proposed to substitute the conventional transmitting system, based on switching power supply and H bridge inverter. The focus of the project is to improve density and input power factor of TEM transmitting system. The research object is the key technology of TEM transmitting system based on matrix converter. The control strategies of three-phase to single-phase matrix converter for the transient electromagnetic method are studied, including the modulation algorithm based on subdivision control and current space vector PWM, and the input power factor control method. The output current waveform control technique of three-phase to single-phase matrix converter is studied, Smooth control of transition processes between the stages of TEM transmitting current waveform is researched to improve the quality of TEM transmitting current waveform. Study on the mechanism of current ripple effects is to improve electromagnetic detection results. A current ripple calculation method based on PWM mode of the matrix converter is proposed with the output load parameters. And an interference elimination method based on the inversion results and transmission signal comparison is studied. A novel compact TEM transmitting system with high efficiency and reliability is implemented.

英文关键词： Matrix converter;SVM;Power factor;Electromagnetic response;TEM