| 引用本文: | 罗登,林宏健,舒泽亮.单相二极管箝位三电平逆变器死区时间补偿技术[J].电力自动化设备,2018,(8): |
| LUO Deng,LIN Hongjian,SHU Zeliang.Dead time compensation technology of single-phase diode-clamped three-level inverter[J].Electric Power Automation Equipment,2018,(8): |
|
| 摘要: |
| 针对调制过程中的死区时间导致逆变器输出电压和电流畸变、谐波含量增加等问题，提出一种简单可行的死区时间补偿策略。该策略在传统调制方法的“调制信号”与“死区时间处理”之间增加“死区时间补偿”。以单相二极管箝位三电平逆变器为对象，分析死区时间对桥臂输出电平的影响，根据桥臂电流方向选择延迟开关器件驱动信号的上升沿或下降沿来对死区时间进行合理补偿。相比于传统基于特定调制方式的死区时间补偿技术，该补偿策略简便易行并且与调制方式独立，能够灵活应用于各种不同的调制方式。在MATLAB/Simulink平台上建立仿真模型对该补偿策略进行仿真验证，并设计了基于可编程逻辑器件的死区时间补偿控制核心，搭建物理实验平台进行实验验证。仿真和实验结果验证了所提策略的有效性。 |
| 关键词: 逆变器 死区时间补偿 桥臂电流 单相二极管箝位三电平逆变器 |
| DOI：10.16081/j.issn.1006-6047.2018.08.021 |
| 分类号:TM464 |
| 基金项目:国家自然科学基金青年连续面上项目(51477144)；中央高校基本科研业务费专项资金资助项目(A092050251516-6) |
|
| Dead time compensation technology of single-phase diode-clamped three-level inverter |
|
LUO Deng, LIN Hongjian, SHU Zeliang
|
|
School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
|
| Abstract: |
| Aiming at the deficiencies of output current and voltage distortions and harmonic content increase caused by dead time in the modulation process, a simple and feasible dead time compensation strategy is proposed. This strategy adds dead time compensation between the modulation signal and dead time processing of the traditional modulation method. Taking the single-phase diode-clamped three-level inverter as an example, the influence of dead time on the arm output level is analyzed, and the rising edge or falling edge is relayed based on the arm current direction, in order to reasonably compensate the dead time. Compared with the traditional dead time compensation techniques based on specific modulation mode, the proposed strategy is simple, independent to the modulation mode and can be flexibly applied to different modulation modes. The simulation model is established with MATLAB/Simulink, the control core of dead time compensation environment is designed based on programmable logic device, and the physical experiment platform is constructed. The simulative and experimental results verify the effectiveness of the proposed dead time compensation strategy. |
| Key words: electric inverters dead time compensation bridge arm current single-phase diode-clamped three-level inveter |
