THREE-LEVEL POWER CONVERSION DEVICE, THREE-LEVEL POWER CONVERSION DEVICE CONTROL METHOD, AND STORAGE MEDIUM

摘要

The three-level power conversion device according to an embodiment has a three-level converter and a three-level inverter. When the voltage unbalance at a neutral point of the three levels between a + side voltage and a – side voltage is greater than or equal to a threshold value, the three-level power conversion device changes the pulse width of a gate pulse at a specific timing of a gate pulse signal for operating a switching element of the three-level converter. The three-level power conversion device performs control so that the voltage at the neutral point approaches zero.