Results 161 to 170 of about 101,520 (199)
Some of the next articles are maybe not open access.
A New Transformerless Configuration for Grid-Connected Photovoltaic Inverters
2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe), 2019Due to high efficiency, low cost and weight, transformerless inverters are widely used to deliver the photovoltaic (PV) energy to the grid. On the other hand, due to VDE standards, the leakage current between the stray capacitance of the PV array and the ground should be limited for the grid connected PV systems.
Babak Rooholahi +1 more
openaire +2 more sources
Transformerless Single-Phase Multilevel-Based Photovoltaic Inverter
IEEE Transactions on Industrial Electronics, 2008The elimination of the output transformer from grid- connected photovoltaic (PV) systems not only reduces the cost, size, and weight of the conversion stage but also increases the system overall efficiency. However, if the transformer is removed, the galvanic isolation between the PV generator and the grid is lost.
Roberto González +3 more
openaire +2 more sources
Transformerless Inverters and RCD: What's the Problem?
2010Considering the structure of PV systems, a stray capacitance can appear between the PV arrays and the ground. When transformerless inverters are used, this capacitance can cause leakage currents to the ground. According to the French standards, a Residual-Current Device (RCD) has to be installed at the AC side of the PV installation, for the protection
Tran-Quoc, T. +9 more
openaire +1 more source
Transformerless series sag compensation with a cascaded multilevel inverter
IEEE Transactions on Industrial Electronics, 2002The use of a cascaded multilevel inverter for transformerless sag/dip compensation is investigated. This topology is investigated as a cost-effective means for series sag compensation by eliminating the large injection transformer and output filter components that are used in conventional series injection devices.
Abraham J. Visser +2 more
openaire +2 more sources
Comparison of parameter and efficiency of transformerless inverter topologies
2015 International Conference on Electrical Drives and Power Electronics (EDPE), 2015Usage of renewable energy is rapidly growing in last times. Photovoltaic energy has a big potential to supply the households in the near future. Small photovoltaic power systems are being developed in last years. Many issues are connected with this type power system.
Martin Galad, Roman Mazgut, Pavol Spanik
openaire +1 more source
Transformerless Inverter for Single-Phase Photovoltaic Systems
IEEE Transactions on Power Electronics, 2007When no transformer is used in a grid-connected photovoltaic (PV) system, a galvanic connection between the grid and the PV array exists. In these conditions, dangerous leakage currents (common-mode currents) can appear through the stray capacitance between the PV array and the ground.
R. Gonzalez +3 more
openaire +1 more source
Single-phase three-wire transformerless inverter
IEE Proceedings - Electric Power Applications, 1994A single-phase inverter providing three wire two-voltage (generally 110/220 V) power is designed and implemented. Instead of using a full-bridge inverter and an output transformer with centre-tapped winding, a three-leg inverter is used to yield a single-phase three-wire circuit.
S.J. Chiang, C.M. Liaw
openaire +1 more source
Leakage current measurement in transformerless PV inverters
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM), 2012Photovoltaic (PV) installations have seen a huge increase during the last couple of years. Transformerless PV inverters are gaining more share of the total inverter market, due to their high conversion efficiency, small weight and size. Nevertheless safety should have an important role in case of these tranformerless systems, due to the missing ...
Kerekes, Tamas +2 more
openaire +2 more sources
Overview of Transformerless Photovoltaic Grid-Connected Inverters
IEEE Transactions on Power Electronics, 2021Transformerless grid-connected inverters (TLI) feature high efficiency, low cost, low volume, and weight due to using neither line-frequency transformers nor high-frequency transformers. Therefore, TLIs have been extensively investigated in the academic community and popularly installed in distributed photovoltaic grid-connected systems during the past
openaire +1 more source
Common-Ground Transformerless Grid-Connected Inverters
2020Rule 1 for eliminating leakage current of full-bridge TLIs and Rule 2 for eliminating leakage current of half-bridge TLIs have been discussed in Chaps. 3 and 4, respectively. This chapter focuses on Rule 3 used in common-ground TLIs. Common-ground TLIs mean that the neutral line of the grid is directly connected to the negative terminal of the PV ...
Huafeng Xiao, Xiaobiao Wang
openaire +1 more source