Results 181 to 190 of about 7,459 (224)

Transformerless Three Phase NPC Inverter with Reduced Switches

2018 IEEE Energy Conversion Congress and Exposition (ECCE), 2018
In a photovoltaic grid connected system, the attenuation of the common mode voltage is one of the main issues. Many single phase inverters have been proposed to improve the common mode characteristic. However, few studies have been focused on the topological improvement for common mode behavior of the three phase inverter. This paper proposed two types
Liwei Zhou, Feng Gao, Weiqi Wang, Matthias Preindl   +3 more
openaire   +1 more source

Predictive voltage controller for T-type NPC inverter

2016 IEEE Region 10 Conference (TENCON), 2016
The objective of this paper is to present a new method to control the TNPC inverter with output LC filter based on the Predictive controller. Furthermore, the balance voltage capacitors is also obtained with the proposed method. The model of the system is used to establish the equations, which can be applied to calculate the future values of the load ...
Hai N. Tran, Tuyen D. Nguyen
openaire   +1 more source

Transformerless interleaving multilevel NPC inverter for photovoltaic systems

2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC), 2015
This paper proposes a transformerless multilevel NPC (Neutral Point Clamped) inverter for grid-connected photovoltaic systems, applying the concept of high power density, using Gallium Nitride power transistors and employing interleaving strategy for reducing the weight/volume of the passive filter elements.
Gustavo Finamor, Marcel Dall Pai, Humberto Pinheiro, Luciano Schuch   +3 more
openaire   +1 more source

Comparative evaluation of three single-phase NPC inverters

2012 10th IEEE/IAS International Conference on Industry Applications, 2012
In this paper is presented a comparative evaluation in steady-state of three single-phase NPC multilevel inverters. The first is a five-level neutral point clamped (NPC) inverter based on multi-stage switching cell (MSSC); the second is also a five-level neutral point clamped (NPC) inverter based on interleaved cell (IC); and the third is a three-level
Joao A. F. Neto, Rene P. T. Bascope, C. M. Cruz, Ronny G. A. Cacau, Grover V. T. Bascope   +4 more
openaire   +1 more source

Transformerless PV Three Level NPC Central Inverter

2019
Generally inverter is developed with centre on high reliability, low cost and mass-production for transformed electrical energy from the PV module to the grid. Basically the DC/AC inverters are used in grid connected photovoltaic energy production systems as the power processing interface between the electric grid and the photovoltaic energy source ...
Mohammed Yassine Dennai, Hamza Tedjini, Abdelfettah Nasri   +2 more
openaire   +1 more source

Robust Predictive Control for NPC Grid-Connected Inverters

Applied Mechanics and Materials, 2014
In this paper, the state space model of neutral point clamped three-level grid-connected inverter is detailed derived and an Robust Predictive Control (RPC) method is proposed. In the proposed method, the total 27 switching vectors composed of a finite set from which the optimal switching vector is selected according to a cost function.
Lu Jun Wang, Tao Gong, Jun Zhu
openaire   +1 more source

Control Methods for Tripled Structure NPC Inverter

2013
Voltage waveform of single inverter contains more harmonics. In order to reduce the harmonic content, the H-bridge inverter with multiple structures was used to obtain a low harmonic voltage. However, this paper explored the multiple method based on the neutral point clamped inverter for obtaining the multiple circuit with lower harmonic content than ...
Cheng Zeng, Hong Zheng
openaire   +1 more source

Diagnosis of a NPC inverter using Goertzel Filters

2019 23rd International Conference on System Theory, Control and Computing (ICSTCC), 2019
Insulated Gate Bipolar Transistors (IGBTs), found in Neutral Point Clamped inverters, can be affected by open-circuit and short-circuit faults. A common mistake found in several papers, from the literature, is highlighted and corrected in this work. The amended method, based on the Park Transform, is extended to isolate the faulty IGBT in a three-level
Abdelkarim, Abdelkarim, Chafouk, Houcine, Gliga, Lavinius, Popescu, Dumitru   +3 more
openaire   +1 more source

Pole-restraining control for npc three-level inverter

2012 IEEE International Energy Conference and Exhibition (ENERGYCON), 2012
State-of-the-art control approaches often neglect the time-variant characteristics of power-electronic systems in favour of a time-averaged approach. In consequence, the resulting system is partly instable, thus, not optimally controlled. The pole-restraining control (PRC) removes the inherent instability, giving considerably improved dynamic behaviour
M. Seifert, C. Heising, R. Bartelt, Volker Staudt, Andreas Steimel   +4 more
openaire   +1 more source

Optimization of SiC-Based H5 and Conergy-NPC Transformerless PV Inverters

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2013
The transformerless dc/ac inverters are critical components in the rapidly growing market of grid-connected photovoltaic (PV) applications. They are synthesized by combining available solutions in terms of the power-section topology, power-semiconductors manufacturing technology, and structure of the output filter. In addition, the silicon carbide (SiC)
Saridakis, Stefanos, Koutroulis, Eftichios, Blaabjerg, Frede   +2 more
openaire   +1 more source