摘要
由于脉动的负载电流对整流器直流侧滤波电容的充、放电效应,非线性整流负载可以导致单相逆变器输出电压出现严重的畸变。导致输出电压畸变的原因主要是由于逆变器具有较大的谐波输出阻抗,且其控制系统不能够对电压畸变做出快速的动态补偿。为使学生对此有深刻的理解,设计了单相逆变器在非线性负载条件下输出电压波形控制的研究性实验,对比分析了同步旋转坐标系下的PI双闭环(PI Dual Loop Control,PIDLC)、PIDLC+RC(Repetitive Control,重复控制)和PIDLC+RC+LCF(Load Current Feedforward,负载电流前馈)的控制性能。通过这样的对比研究,使学生在深入了解和掌握相关的单相逆变器及其控制策略的同时也让他们体会到科学研究的基本理念和方法,并有助于提升他们的实践能力和科研素养。
The nonlinear rectifier load usually leads to severe harmonics in the output voltage of a single-phase inverter due to pulsating current charging the DC side capacitor of the rectifier. Relatively high gain of output impedance and low dynamic response capability of control system are two main reasons for the voltage distortion under nonlinear load condition. In order to make the students have a deep understanding of these points,a research experiment is designed for output voltage waveform control of single-phase inverter. The performance of dual loop control method with PI controller under synchronous reference frame( PIDLC),PIDLC plus repetitive control( PIDLC + RC) and PIDLC plus PIDLC and load current feedforward compensation( PIDLC + RC + LCF) methods are compared and analyzed. Through these comparison researches,students can further understand and master the control strategy of single-phase inverter. At the same time,the students can experience the basic concept and method of scientific research,and their practice ability and scientific research literacy can be also benefited from this experiment course.
作者
游江
孙蓉
张敬南
刘洪胜
YOU Jiang;SUN Rong;ZHANG Jingnan;LIU Hongsheng(College of Automation,Harbin Engineering University,Harbin 150001,China)
出处
《实验室研究与探索》
CAS
北大核心
2019年第10期45-49,99,共6页
Research and Exploration In Laboratory
基金
黑龙江省教育教学改革项目(SJGY20170507)
哈尔滨工程大学教学改革研究项目(JG2017B19)
关键词
单相逆变器
谐波畸变
非线性负载
波形校正
实验教学
single-phase inverter
harmonics distortion
nonlinear load
waveform correction
experiment teaching
