NPC三电平电压逆变器谐波最优PWM研究

2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG) Pub Date : 2018-04-01 DOI:10.1109/IGBSG.2018.8393537

Ji Zhang, Meifeng Gao, Jiaming Guo, Hong Tian, X. Kong

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引用次数: 0

摘要

提出了一种基于数字信号处理器(DSP)的中性点箝位(NPC)三电平逆变器(TLI)谐波最优脉宽调制(HOPWM)的数字实现方法。首先，将定子谐波电流总畸变量设定为目标函数，针对NPC TLI设计谐波最优PWM;其次，利用matlab软件的优化工具箱，对目标函数进行非线性约束，求解极值;最后，利用TMS320F28335高性能DSP实现了TLI的HOPWM，并对输出相位和线电压的频谱进行了分析。实验结果表明，HOPWM在低开关频率下具有良好的谐波性能。

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Research on harmonic optimal PWM for NPC three-level voltage inverters

This paper presents a digital implement method of harmonic optimal pulse width modulation (HOPWM) for the neutral-point clamped (NPC) three-level inverter(TLI), based on digital signal processor (DSP). First, the total stator harmonic current distortion was set as the objective function, harmonic optimal PWM is designed for NPC TLI Second, the optimization toolbox of the matlab software is used to solve the extreme value, with nonlinear constraints of the objective function. Finally, the TMS320F28335 high performance DSP is used to realize the proposed HOPWM for the TLI, and the spectrum of the output phase and line voltage is analyzed. The experimental results indicate the HOPWM can provide good harmonics performance at low switching frequencies.

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2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG)

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