Active and Reactive Power Control based on Predictive Voltage Control in a Six-Phase Generation System using Modular Matrix Converters

Abstract

Renewable energy generation systems under distributed generation frame emerges as a plausible solution for nowadays growing world energy demands. In this context multiphase wind generation systems are a feasible option that consist of renewable AC source that need efficient and totally controlled power conversion stages. In this work a novel active and reactive power control strategy based on two cascade control loops using a combination of classical PR controller and Model Based Predictive Voltage Control is proposed. Furthermore, the generator is a Permanent Magnet Synchronous Generator and the power stage is based on a multi-modular direct matrix converter topology providing interesting features to the scheme. The performance of the whole system is analysed regarding tracking of reference and THD with satisfying transient results and THD lower than 1.52 % in the injected current widely accomplishing with international standards.

Nonlinear Optimal Control for Six-Phase Induction Generator-Based Renewable Energy Systems

“…Thus one has for the stator expression of the current and voltage variables in reference frames dqs1 and in reference frame dqs2. Equivalently, the voltage and current variables of the rotor are expressed initially in an ABC three-phase reference frame which after applying Clark's and Park's transformations is turned into the asynchronously rotating reference frame dqr Therefore, one has the following sets of equations [5][6][7][8][9]: (7) Moreover, the magnetic flux variables are connected with the stator and rotor current variables through the following equations [5][6][7][8][9].…”

“…Next, the field orientation assumption is made about the magnetic flux of the motor (the rotor's dq frame turns at an asynchronous speed which allows to set equal to zero the q-axis component of the rotor's magnetic flux). This signifies ψdr = ψr and ψqr = 0 [5][6][7][8][9].…”

“…Multi-phase generators exhibit specific advantages when compared to three-phase synchronous or asynchronous generators as parts of renewable energy systems (for instance wind power generation units or marine/tidal power generation units) [1][2][3][4]. In particular 6-phase dual star induction generators (DSIGs) consist of dual 3-phase windings in their stator, and can achieve better power rates [5][6][7][8][9]. Besides, they exhibit fault tolerance and remain functional when one or more of their phases undergo a failure [10][11][12].…”

Speed Control of a Six-Phase IM Fed by a Multi-Modular Matrix Converter Using an Inner PTC With Reduced Computational Burden

“…Implementing a modular scheme of three-phase direct matrix converters, also called a multimodular matrix converter (M-MMC), had been proposed with success in six-phase generation systems to supply threephase loads [14], [15]. M-MMC has also been introduced to interconnect the generation stage with the grid, showing interesting advantages [16]. One of the main motivations of this work is to investigate the introduced advantages by using the M-MMC in conjunction with a multiphase (six-phase) induction machine (SPIM).…”

Predictive Current Control Strategy for a Multi-Modular Matrix Converter

“…Los convertidores de potencia más populares incluyen elementos almacenadores de energía, los cuáles introducen posibilidades a fallas, como también mayor peso y tamaño. El convertidor matricial es una topología de convertidor de potencia que no tienen almacenadores de energía, por eso, son una alternativa flexible y eficiente para el manejo de la energía [1].…”