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Model Predictive Control (MPC) method offers advantages of easy implementation and fast dynamics. However Model predictive control method has variable switching frequency, which makes design of the output filter difficult for power converter. Despite the problems of MPC algorithm, there are little methods to fix the switching frequency using MPC algorithm in power converter. Therefore, this paper...
This paper presents an approach to completely eliminate common-mode voltage (CMV) of an AC motor fed by a three-level neutral point clamped (NPC) inverter. CMV is produced at the star point of an AC machine fed from the inverter. Its parasitic coupling with the motor frame has a negative effect on the motor itself and other equipment, particularly in underground environment. The proposed approach...
The paper proposes a moving average filter (MAF)-based model predictive control (MPC) for the electric vehicles (EVs) bidirectional chargers. Grid virtual flux is used to estimate the grid voltage through a low pass filter (LPF). An MAF, which acts as an ideal LPF, can eliminate the effect of unbalanced/distorted grid voltage and unknown characteristic harmonics. Both the two-cascaded LPF-based and...
In this paper a new control method for a three level flying capacitor buck converter has been developed using a modulated model predictive control. The proposed method takes into account all the possible switching configurations of the converter and selects two switching configurations to be applied to the converter in the next sampling time, using a cost function. The cost function has been defined...
In this paper, a new method for Space Vector Modulation (SVM) for the 3×3 direct matrix converter is proposed. This method is based on a combination of Model Predictive Control (MPC) and SVM, also denoted as Continuous Control Set MPC. The proposed method uses all available vectors, and allows the converter to produce waveforms of high quality at both power ports, also when subjected to unbalanced...
This paper presents a multi-objective Model Predictive Control (MPC) for grid-tied 4-cell 15-level Packed U Cells (PUC) inverter. This challenging topology is characterized by high power quality with reduced number of components compared to conventional multilevel inverters. Compared to traditional PI controller, MPC is attracting more interest due to its good dynamic response and high accuracy of...
In this paper, optimal voltage vector sequences on model predictive control is proposed for a grid connected three-phase voltage source inverter. Two adjacent voltage vectors and zero voltage vectors are utilized in one switching period. Optimal duty cycles for all sectors are calculated. Voltage vector pair with minimum value of the cost function is selected and applied in the next switching period...
This paper presents a new control technique applied on a multilevel inverter recently launched, the Packed U-Cells also known as PUC inverter. PUC became the interest of several studies for different applications mainly for the grid connected systems. In this work, Model Predictive Control (MPC) is used to control the grid current and the auxiliary capacitor voltage in the grid connected PUC inverter...
In this paper, controlling of a DC-DC bidirectional converter is investigated using model predictive control (MPC) technique. The converter is supposed to connect a battery bank to the DC bus. The main purpose of MPC method is to maintain the DC bus voltage in a predefined rated range, which means injecting active power to the DC bus to increase bus voltage and discharging the battery, and on the...
This paper introduces so-called “Assignment Figures” as a tool to evaluate the impact of different cost functions on the resulting switching state patterns for predictive inverter control. These Assignment Figures are derived for two-level voltage source inverters and investigated for different cost function variants, including weighted switching frequency reduction and common-mode voltage reduction...
For an AC/DC coupled transmission system, the change of transmission power on the DC lines will significantly influence the AC systems' voltage. This paper describes a method to coordinated control the reactive power of power plants and shunt capacitors at DC converter stations nearby, in order to keep the voltage of the pilot bus tracking its set point considering the DC system's transmission schedule...
We present a simplified Mixed Logical Dynamic (MLD) model for DC-DC Boost converter using less number of binary variables and continuous variables. A constrained optimal problem is formulated and solved based on Model Predictive Control (MPC) using the simplified MLD model. The optimized switching signal derived by the MPC regulates the output voltage. The MLD modeling of the converter is accurate...
This paper presents a new and simple Finite Control Set Model Predictive Control (FCS-MPC) strategy of the Modular Multilevel Matrix Converter (M3C). This converter is one of the direct AC/AC power converters suitable for medium-voltage high-power machine drives with regenerative capacity. One of the main feature of this converter is that does not need external dc-voltage supplies and thus, all capacitor...
This paper presents a model predictive control method applied to a single phase grid-connected inverter. The method uses a discrete-time model of the system to predict the future value of the load current by using all possible voltage vectors generated by the inverter. The voltage vector which minimizes a quality function is selected. Then, use the switch state deduced by the select voltage vector...
By analyzing the hybrid property of Microgrid in detail, a mixed logical dynamical model is set up with Hybrid theory. The energy in DC bus capacitor is chosen as state variable, the system functions and constraints with continuous state variables, input control variables, logical variables and auxiliary variables are presented. Based on the MLD model, model predictive control theory is applied for...
In this work, a Back to Back converter based on a Diode Clamped Multilevel topology is presented. Both converters are controlled using model predictive approach. The control objective of the front-end converter is the DC bus voltage regulation with sinusoidal current and unity power factor, while the load converter drives an induction motor through predictive direct torque control. Both algorithms...
Model predictive control (MPC) techniques have been recently applied with success to the current control of voltage source inverters (VSIs). However, the dc-bus utilization and the overmodulation performance of the VSI using MPC techniques have not been explored and addressed yet. This work aims at filling this gap and shows for the first time the performance of a five-phase VSI both in linear and...
In this work, a back-to-back Diode Clamped Multilevel converter system using Model Predictive Control is evaluated. DC link voltage balance and currents as main parameters are optimized by means of a proper cost function design. This strategy allows fast system response and capacitors voltage balance under various operating conditions including active power flow, different modulation algorithms, and...
This paper shows a predictive current control with DC-Link voltage balance feature. A restriction in the voltage vectors generated by the 3L converter is explained, which leads to a better 3L voltage pattern, reducing double commutations and accelerating the calculation routine. On the other hand an estimation of the switching losses is considered in the selection of the future voltage vector, which...
The converter system under consideration is a two-input one-output non-inverting buck-boost converter. The two control inputs introduce a degree of freedom that may be used to optimize dynamic performance and other objectives such as energy efficiency at steady state. Dynamic performance during transient is achieved using an MPC scheme, which drives the system at steady state toward its energy efficiency...
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