摘要
为了对深部矿产资源进行探测,实现基于低压器件进行高压大功率输出的目的,提出一种基于模块化多电平变换器(MMC)的新型瞬变电磁发射电路及其控制策略。该发射电路采用模块化结构,由多个半桥子模块(SM)级联而成,各子模块在高压直流侧串联以分担高电压应力。建立发射电路的等效电路模型,分析调节发射电流上升沿、下降沿的原理,采用分段控制策略,将1个周期内的发射电流分为8段,对各段电流实现精确控制。在MATLAB/SIMULINK中建立仿真模型,并搭建4级MMC发射系统样机验证所提发射系统的可行性。研究结果表明:相比于H桥发射电路,所提发射电路的电流上升沿和下降沿更快,有利于提高探测效率。
To detect deep mineral resources and achieve high-voltage output with low-voltage devices, a novel transmitter based on modular multilevel converter(MMC) was proposed, which adopted modular structure and was formed by cascaded half-bridge sub-modules(SM) to share high voltage stress. By establishing the equivalent circuit, the principle of adjusting the rising and falling edges of the transmitting current was analyzed. The transmitting current in a cycle was divided into eight segments using a segmented control strategy, and the segmented currents were precisely controlled. The simulation model was built in MATLAB/SIMULINK, and a prototype of the four-level MMC transmitting system was built to further verify the feasibility of the system. The results show that compared with the H-bridge transmitter, the proposed transmitter has faster current rising and falling edges, which improves detection efficiency.
作者
李刚
张昕昊
于生宝
LI Gang;ZHANG Xinhao;YU Shengbao(College of Instrumentation and Electrical Engineering,Jilin University,Changchun 130026,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第8期2964-2973,共10页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51507073)。
关键词
瞬变电磁法
模块化多电平变换器
分段控制策略
高压发射系统
transient electromagnetic method(TEM)
modular multilevel converter(MMC)
segmented control strategy
high-voltage transmitting system
