A Carrier-Based PWM Technique for Capacitor Voltage Balancing of Single-Phase Three-Level Neutral-Point-Clamped Converters
A Carrier-Based PWM Technique for Capacitor Voltage Balancing of Single-Phase Three-Level Neutral-Point-Clamped Converters
复制标题
DOI：
10.1109/apec.2014.6803695
复制
发表时间：
2014-03
影响因子：
4.4
通讯作者：
I. Soares de Freitas;Marcos Moura Bandeira;Luciano de Macedo Barros;C. Brandão Jacobina;Euzeli Cipriano dos Santos Junior-Euzeli-Cipria
中科院分区：
文献类型：
--
作者：
I. Soares de Freitas;Marcos Moura Bandeira;Luciano de Macedo Barros;C. Brandão Jacobina;Euzeli Cipriano dos Santos Junior-Euzeli-Cipria
本文提出了一种中性点电容电压平衡的单相中点箝位变流器脉宽调制（PWM）技术。该技术是基于一个共模电压信号注入到传统的基于载波的PWM的正弦调制信号。虽然已经报道了几种策略，这样的问题，通过使用电压信号注入，所提出的方法是非常简单，易于实现。一组方程来演示注入的电压信号如何在中性点电流上引入直流分量，该分量可以被控制以允许电容器电压平衡。
In this paper, a pulsewidth-modulation (PWM) technique with neutral point capacitor voltage balancing in single-phase neutral-point-clamped converters is presented. The technique is based on the injection of a common-mode voltage signal into the sinusoidal modulating signals of the conventional carrier-based PWM. Although several strategies have been reported for such a problem by using the voltage signal injection, the proposed method is very simple with easy implementation. A set of equations is presented to demonstrate how the injected voltage signal introduces a dc component on the neutral-point current, which can be controlled in order to allow the capacitor voltages balancing.