电力系统保护与控制Issue(7)：91-96,6.
基于双调制波技术的三电平Z源逆变器中点电位平衡控制
Neutral-point potential balance control for three-level Z-source inverters based on double modulation wave technique
张伦健 1谭国俊 1陈利萍1
作者信息
- 1. 中国矿业大学信息与电气工程学院，江苏 徐州 221008
- 折叠
摘要
Abstract
Conventional neutral point clamped (NPC) three-level Z-source inverters are commonly powered by two isolated DC sources. For a topology composed of a DC source and two cascaded capacitances, the relationship between two shoot through states and neutral-point potential is introduced, and the basic principle of double modulation wave carrier-based PWM (DMWPWM) is analyzed. A neutral-point potential control method of three-level Z-source inverter based on DMWPWM is proposed. The position of shoot through is designed rationally and the intermediate voltage modulation wave is adjusted dynamically. The feedback control method is adopted to control the neutral point potential, which eliminates the low-frequency oscillations of NP potential and restrains the DC offset effectively, and won’t increase the number of semiconductor commutations. The superiority of the proposed method is verified by simulation.关键词
三电平Z源逆变器/直通/中点电位/双调制波/低频波动/直流偏移Key words
three-level Z-source inverter/shoot through/neutral-point potential balancing/double modulation wave/low-frequency oscillations/DC offset分类
信息技术与安全科学引用本文复制引用
张伦健,谭国俊,陈利萍..基于双调制波技术的三电平Z源逆变器中点电位平衡控制[J].电力系统保护与控制,2013,(7):91-96,6.
