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One of the major drawbacks of Finite Control Set — Model Predictive Control (FCS — MPC), is the high switching frequency, besides a spread harmonic spectrum. Despite of this, the FCS — MPC provides excellent speed to changes of references and disturbances. In this work we present a control strategy based on FCS — MPC that allows a reduction of the switching frequency in steady state, increasing the...
Due to problems caused by variable switching frequency a modulated model based predictive control was proposed for different topologies and their applications. However, for cascade H-bridge multilevel converters, there is another problem, the imbalance in the dc-link voltages. This paper proposes extend the modulated model based predictive control to a cascade H-bridge 7-level STATCOM, further including...
Recent publications on multilevel converters show different topologies and control to obtain an improvement in the sinusoidal current waveform, controlling de DC voltage and the active/reactive power. This paper presents a 27-level asymmetric multilevel converter for photovoltaic injection using a predictive control algorithm that commands the three-phase converter to control the active power injected...
Multiphase induction motor drives have gained popularity due to their fault tolerance and better power/current distribution per phase which are very attractive for industrial applications. Current control strategies with the estimation of unmeasurable variables (typically rotor variables) has been recently proposed for multiphase induction drive. This paper proposes a novel current control based on...
Finite control set model predictive control techniques are mainly distinguished by a variable switching frequency which causes noise, large voltage and current ripples at low sampling frequency. This paper presents a comparative study of two enhanced predictive current control techniques with fixed switching frequency applied to an asymmetrical six-phase induction motor drive. Simulation results are...
In electrical drive applications based on induction machines, such as the propulsion drive of an electric vehicle, the rotor currents cannot be measured, so it needs to be estimated. This paper describes the rotor currents estimation through reduced order estimator known as Kalman filter to apply a speed-sensorless control of dual three-phase induction machines by applying a current inner loop based...
In the recent years, model predictive control has been consolidated as a design strategy and an attractive alternative for the control of power electronic devices. This paper proposes an active and reactive power control strategy based on predictive control approach applied to grid-connected renewable energy systems. To accomplish this, a three-phase two-level voltage source inverter based topology...
Classic finite-set model predictive control techniques are distinguished by a variable switching frequency which causes noise, large voltage and current ripple. This paper presents an enhanced predictive current control technique with fixed switching frequency applied to the six-phase drives and a Kalman Filter estimator. Simulation results are provided to show the efficiency of the current control...
Increasing worldwide energy demand and well known pollution effects of fossil fuels, make necessary to develop new environmentally friendly energy generation systems such as wind energy. In this research a predictive current control with reactive power reduction is proposed for a six-phase energy generator — multi-modular matrix converter system. The proposal shows a significant harmonic reduction...
Fault-tolerance is one of the most sought-to capabilities of wind energy conversion systems (WECS). The ability to maintain operation even after an open-phase fault, allows for the system operators to maintain energy production, providing tangible economic benefits. Recently, the use of multiphase drives for WECS have been proposed due to their inherent fault-tolerance capability and the capacity...
The massive penetration of renewable energy sources in the utility grid has emerged as the solution to obtain clean energy in modern electric systems, which are gradually replacing their generators that produce CO2 emissions to achieve a sustainable growing. Power electronics is quite relevant in the deep penetration of renewable energy, because the use of such equipment is mandatory to integrate...
The increasing civilian demand for autonomous aerial vehicle in the professional markets led to an abundance of inexpensive navigational hardware platforms and vehicle prototypes. Current photogrammetry-based applications require crisp and precise positioning of images so that the process does not fails. Also systems adaptable to the circumstances for better effectiveness, vehicles capable of vertical...
This paper presents the development of a protocol converter software (gateway) between two standards used by monitoring and control tasks in power electrical systems. At one side the legacy protocol IEC (International Electro-technical Commission) 60870-5-101 and on the other side the new protocol IEC 61850, which introduces a number of new concepts for the automation of substations, taking advantage...
Power electronic grid-connected converter topologies are widely used as grid interface to interconnect several renewable energy sources under the concept of distributed generation systems. These converters must ensure an active and reactive flux control, minimize the current and voltage harmonic distortions and perform a proper synchronization with the electrical grid. This paper presents an analysis...
The uncertainty of the irradiation and temperature availability in renewable energy sources, especially in photovoltaic (PV) systems in distributed generation topology, often involves the use of storage energy unit. The power flux variability from the PV systems to the storage energy unit due to an irradiation and temperature variations produce a variation of the flux power from the storage energy...
This paper presents a digital hardware implementation of a real-time simulator for a Multiphase Drive using a Field-Programmable Gate Array (FPGA) device. The simulator was developed using Very High Speed Integrated Circuit Hardware Description Language (VHDL), with a modular and hierarchical design, making it flexible and portable. A state-space representation model suitable for FPGA implementation...
The interest in electricity generation from photovoltaic (PV) systems has experienced significant growth in recent years, justified by the reduced environmental impact generated. The energy extracted from PV systems is related to the amount solar irradiation and thus the angle of incidence of the sun's rays on the surface of the panels. This paper presents, on one hand, a novel design of a biaxial...
Algorithms of synchronized pulsewidth modulation (PWM), based on special space-vector control scheme (with utilization of minimal number of voltage space vectors), have been applied for synchronous control of four neutral-point-clamped (NPC) inverters feeding six-phase (dual three-phase) drive on the base of asymmetrical open-end windings induction motor. It allows providing continuous synchronization...
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