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In this work, a Lyapunov-function based control method for three-phase grid-tied LCL-filtered quasi-z-source source inverters (qZSIs) is proposed. The mathematical model of grid-tied qZSI is modeled in the synchronously rotating dq-frame. Motivated from the energy distribution in qZSI, an energylike function (referred to as Lyapunov-function) is formed. Then, using Lyapunov's direct method a Lyapunov-function...
This paper presents a decoupled power control method for a single-phase grid-tied inverter that uses model predictive control (MPC) to minimize the number of switch state changes required to control the output bridge while simultaneously constraining the output current harmonics. On one hand, minimizing the number of switch state changes in the output bridge of the inverter results in minimizing switching...
In this paper space vector model of a fifteen-phase voltage source inverter (VSI) is presented. The space vector Pulse Width Modulation (SVPWM) of a fifteen-phase voltage source inverter (VSI) with the aim of producing sinusoidal output waveform, is illustrated. Generalized space vector theory is used to model the inverter and the SVPWM. As per the general inverter switching theory there are 215 =...
In this paper comprehensive space vector model of a thirteen-phase voltage source inverter (VSI) is reported. The paper also discusses the space vector Pulse Width Modulation (SVPWM) of a thirteen-phase voltage source inverter (VSI) with the aim of producing sinusoidal output waveform. Generalized space vector theory is used to achieve the SVPWM. As per the general inverter switching theory there...
Multiphase machines are considered for high power variable speed drive applications due to numerous advantages that they offer when compared to their three-phase counterparts. Multiphase VSI or CSI used to provide variable voltage and variable frequency supply with appropriate PWM control to multiphase machines. Carrier-based PWM and space vector PWM (SVPWM) are the most common options for controlling...
Multi-phase (more than three-phase) converters are required mainly for feeding variable speed multi-phase drive systems. This paper presents one such solution by using direct ac-ac converter that can be used to supply a seven-phase drive system. Simple Pulse width modulation (PWM) technique is developed for the proposed matrix converter configuration. The developed modulation technique is based on...
Variable speed multi-phase (more than three-phase) drive systems are seen as serious contender to the existing three-phase drives due to their distinct advantages. Supply to the multi-phase drives are invariably given from a voltage source inverter. However, this paper proposes an alternative solution for supplying multi-phase drive system using direct ac-ac converter called a matrix converter. The...
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