Research on SVPWM Optimized Modulation Algorithm Based on ANPC Five-Level Inverter

This paper mainly studies the main topology of the active neutral point clamp five-level (5L-ANPC) inverter and analyzes the working principle of the inverter. Because the traditional space vector pulse width modulation (SVPWM) method of the inverter requires the operation of trigonometric function on the time calculation of the sector, which increases the complexity of the inverter control, an improved SVPWM modulation method based on g-h coordinate system is realized. The modulation algorithm uses the feature that the basic vector of three-level inverter is 60°, establishes a 60° vector coordinate system, avoids the complex trigonometric function operation in sector time calculation, greatly reduces the calculation workload required for the implementation of the control algorithm, reduces the difficulty of the implementation of the algorithm, and improves the operation speed of the inverter. By building a software model for simulation and conducting experimental verification on the effectiveness of the algorithm.