Abstract
One of the major challenges in Neutral Point Clamped (NPC) Dual Active Bridge (DAB) converters is maintaining capacitor voltage balance. Ineffective voltage balancing can lead to several issues such as increased harmonic distortion, which degrades power quality and impacts overall system performance. It may also result in over-voltage conditions, potentially damaging components and reducing system reliability. Moreover, voltage imbalances contribute to higher energy losses, reducing overall efficiency and increasing operational costs. Beyond these issues, capacitor voltage imbalances can also cause thermal stress on converter components, accelerating aging that potentially leads to system failure. Additionally, they complicate control strategies, making it more difficult to achieve stable operation under varying conditions. To overcome these challenges, the integration of a chopper with carrier wave control is proposed, which aims to maintain voltage balance even in the presence of faults and switching irregularities.