Space‐vector pulse‐width modulation algorithm for multilevel voltage source inverters based on matrix transformation and including operation in the over‐modulation region

Abstract

Multilevel voltage source inverters are most promising when employed in high-power and high-voltage applications. As the number of inverter levels increases, the algorithm of space-vector pulse-width modulation (SVPWM) becomes increasingly complex. Based on the intrinsic relationship between SVPWM algorithms for 2-level inverters and those for arbitrary-level inverters, here a novel SVPWM algorithm is proposed for an arbitrary-level inverter. Considering that the nearest three vectors are used to synthesise the reference vector, the on-time of the voltage vector for an arbitrary-level inverter can be acquired from that for a 2-level inverter via the use of a linear transformation. This algorithm is verified through simulation and experiments, with the latter proving that the proposed algorithm can meet the real-time requirements of multilevel inverters.

Converter Utilization Ratio Enhancement in the THD Optimization of Cascaded H-Bridge 7-level Inverters

“…The phase voltage rms can be obtained by taking the integral of the output voltage as expressed in (12).…”

“…Among the different topologies and structures, owing to some characteristics like modular structure, extendibility and electromagnetic compatibility, cascaded H-bridge inverters are the most popular [8]. Different switching techniques and control algorithms are employed to control these inverters [9]- [12]. In most of these methods, the main purpose is harmonic reduction in generated output voltage.…”

A Hybrid Modulation Strategy with Reduced Switching Losses and Neutral Point Potential Balance for Three-Level NPC Inverter

“…PWM strategies for three-level voltage source inverters can be broadly categorized into carrier based PWM (CBPWM) [8][9][10] and space vector PWM (SVPWM) [11,12]. Some existing literature has introduced discontinuous PWM strategy [13,14].…”

Non‐linear adaptive hysteresis band pulse‐width modulation control for hybrid active power filters to reduce switching loss

“…Different pulse‐width modulations (PWMs), from hysteresis to space‐vector modulations (SVMs), have been proposed for controlling APFs [5]. For example, PWM methods such as ramp comparison, ripple prediction [6, 7] and improved asymmetric SVM [8] were developed to obtain faster dynamics and greater robustness.…”