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首页> 外文会议>Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition >Decoupling control of input voltage balance for diode-clamped dual buck three-level inverter
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Decoupling control of input voltage balance for diode-clamped dual buck three-level inverter

机译：二极管钳位双降压三电平逆变器的输入电压平衡解耦控制

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In multilevel inverter, it is a key problem that how to balance voltages of input capacitors. Because of the coupling of multilevel modulation and input voltage balance, no matter hardware circuit or control method of multilevel inverters are always complex, and speed of voltage balance is low. Dual Buck circuit which composed by two Buck DC/DC converter bridges, works in current half-period mode. A novel diode-clamped multilevel dual Buck inverter is presented, which inherits those features. At any moment, one Buck bridge works for inverter, another works as a reverse Boost circuit and charges up input capacitors. So inverter and voltage balance control are completely decoupled. If multilevel number is not small, this method is conducive to reduce the number of devices and the system complexity, and improve reliability of the system. Simulation and experiment of a diode-clamped three-level inverter verifies these analyses.
机译：在多电平逆变器中，如何平衡输入电容器的电压是一个关键问题。由于多电平调制和输入电压平衡的耦合，无论是多电平逆变器的硬件电路还是控制方法总是很复杂，电压平衡的速度很低。由两个降压DC / DC转换器电桥组成的双降压电路以电流半周期模式工作。提出了一种新颖的二极管钳位多电平双降压逆变器，该逆变器继承了这些特性。任何时候，一个降压电桥都可用于逆变器，另一个可以作为反向Boost电路并为输入电容器充电。因此，逆变器和电压平衡控制已完全解耦。如果多级数不小，则有利于减少设备数量和系统复杂度，提高系统可靠性。二极管钳位三电平逆变器的仿真和实验验证了这些分析。

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