摘要
ITER中性束注入器加速极需要一套逆变型直流高压电源系统。该电源采用三相三电平(TPTL)直流变换器作为基本单元,通过占空比控制实现对输出电压的快速调节。针对三相三电平直流变换器在小占空比模式下输出电压纹波大的缺点,提出了一种全新的控制策略。该策略通过协调直流母线电压的大小和逆变器占空比的变化对输出电压进行调节。为了验证新的控制策略的性能,搭建了200kV/60A的MATLAB/Simulink仿真模型和400V/6A的原理样机。仿真结果和样机实验结果表明,新的控制策略可以实现逆变型高压电源在输出电压快速可调的情况下降低输出电压纹波。
An inverter type high voltage power supply is required for the acceleration of ITER neutral beam injector (NBI) system. The power supply employs three-phase three-level DC/DC converter as its basic component. This type of power supply can regulate the output voltage rapidly by the duty cycle modulation of the inverter switches. However, when the duty cycle is very small, the output ripple will be large. A new control strategy has been studied for the power supply, the output voltage is regulated by inverter duty cycle combining with adjusting the dc-link voltage. In order to verify the control strategy, a 200 kV/60 A Simulink model and a 400 V/6 A prototype have been established. Simulation and experimental results demonstrate that the topology with this control strategy can limit the voltage ripple while maintain the rapid voltage response.
作者
张明
周澜
王姝
马少翔
章雪亮
于克训
潘垣
Zhang Ming;Zhou Lan;Wang Shu;Ma Shaoxiang;Zhang Xueliang;Yu Kexun;Pan Yuan(International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Wuhan 430074, China;Economic Research Institute of State Grid Hubei Electric Power Co Ltd, Wuhan 430074, China)
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2019年第4期67-73,共7页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(51707073)
国家重点发展计划项目(2017YFE0300104)
关键词
高压电源
中性束注入器
控制策略
三相三电平直流变换器
占空比控制
high voltage power supply
neutral beam injector
control strategy
three-phase three-level DC/DC converter
duty cycle modulation
