| 一种新颖的电压源逆变器自适应死区补偿策略 |
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| 引用本文： | 周华伟,温旭辉,赵峰,张剑,郭新华.一种新颖的电压源逆变器自适应死区补偿策略[J].中国电机工程学报,2011,31(24). |
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| 作者姓名： | 周华伟 温旭辉 赵峰 张剑 郭新华 |
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| 作者单位： | 中国科学院电工研究所,北京市海淀区,100190 |
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| 基金项目： | 国家自然科学基金项目(50777060)~~ |
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| 摘 要： | 为解决空间矢量脉宽调制（space vector pulse width modulation，SVPWM）电压源逆变器低频和轻载时死区效应导致相电压和相电流畸变、零电流钳位效应等问题，分析死区效应和零电流钳位效应，提出一种新颖的自适应死区补偿策略。该策略无需电流极性检测，在同步旋转坐标系下，通过PI控制器调节扰动观测器观测出的q轴扰动电压，获得死区补偿时间；然后在传统SVPWM基础上，在每个脉宽调制周期内，根据两个非零空间电压矢量作用时间之比分配该死区补偿时间；最后用分配的补偿时间对这两个矢量作用时间分别进行补偿。实验结果表明，所提方法能明显地抑制电流低频谐波，有效地削弱零电流钳位现象，提高系统低速运行性能。
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| 关 键 词： | 空间矢量脉宽调制 电压源逆变器 死区效应 零电流钳位效应 扰动观测器 自适应死区时间补偿 |
A Novel Adaptive Dead-time Compensation Strategy for VSI |
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| ZHOU Huawei,WEN Xuhui,ZHAO Feng,ZHANG Jian,GUO Xinhua.A Novel Adaptive Dead-time Compensation Strategy for VSI[J].Proceedings of the CSEE,2011,31(24). |
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| Authors: | ZHOU Huawei WEN Xuhui ZHAO Feng ZHANG Jian GUO Xinhua |
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| Affiliation: | ZHOU Huawei,WEN Xuhui,ZHAO Feng,ZHANG Jian,GUO Xinhua(Institute of Electrical Engineering Chinese Academy of Sciences,Haidian District,Beijing 100190,China) |
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| Abstract: | The dead-time effects of voltage source inverter(VSI) in low-frequency and light-load conditions causes voltage and current distortions,zero-current clamping effects,etc.To solve the problems,the dead-time and zero-current clamping effects were analyzed,and then a novel adaptive dead-time compensation algorithm was proposed.The proposed algorithm avoids the difficulty in the phase current polarity check.The compensation dead-time is obtained from the PI regulator results of the q-axis disturbance voltage.Ba... |
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| Keywords: | space vector pulse width modulation(SVPWM) voltage source inverter(VSI) dead-time effects zero-current clamping effects disturbance observer adaptive compensation dead-time |
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