Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Tomi Roinila"'
Publikováno v:
IEEE Open Journal of Power Electronics, Vol 5, Pp 1340-1349 (2024)
High-gain DC-DC converters have become very important devices in the operation of renewable energy methods such as wind and solar power to provide the required voltage and current levels. This work describes a new common ground ultra-high step-up DC-
Externí odkaz:
https://doaj.org/article/0d9946cbac8b46b492cc982a036e7455
Publikováno v:
IEEE Access, Vol 12, Pp 108121-108133 (2024)
High-gain DC/DC converters play critical roles in most renewable-energy applications such as wind and solar power. A significant number of the high-gain converters are utilized to boost voltage gain by employing an excessive duty cycle and low turn r
Externí odkaz:
https://doaj.org/article/f429a4e736da4fc0b9436e6416b8877b
Autor:
Hikmat Basnet, Tomi Roinila
Publikováno v:
IEEE Access, Vol 12, Pp 99499-99507 (2024)
Energy-storage-equipped static synchronous compensators (E-STATCOM) are crucial devices in a modern power grid for regulating both the active and reactive power, thereby improving the efficiency and power quality. Current controllers commonly used wi
Externí odkaz:
https://doaj.org/article/f9559eff11014842a5cc5249105f1f2f
Effects of Ramp Rate Limit on Sizing of Energy Storage Systems for PV, Wind and PV–Wind Power Plants
Publikováno v:
Energies, Vol 16, Iss 11, p 4313 (2023)
As the share of highly variable photovoltaic (PV) and wind power production increases, there is a growing need to smooth their fast power fluctuations. Some countries have set power ramp rate (RR) limits that the output powers of power plants may not
Externí odkaz:
https://doaj.org/article/af68a78dc0004b04a18fa485d3cabd4b
Publikováno v:
IEEE Access, Vol 8, Pp 178085-178096 (2020)
Impedance-based stability criterion has become a popular method in determining the stability of grid-connected systems. Recent studies have presented the utilization of various pseudo-random-sequence (PRS) perturbations for rapidly and accurately obt
Externí odkaz:
https://doaj.org/article/856378f6641a443d9f2873a7427f827f
Autor:
Matias Berg, Tomi Roinila
Publikováno v:
Energies, Vol 13, Iss 11, p 2923 (2020)
Grid-connected and grid-forming inverters play essential roles in the utilization of renewable energy. One problem of such a converter system is the voltage deviations in the DC-link between the source and the inverter that can disrupt the inverter o
Externí odkaz:
https://doaj.org/article/2a8db6597c0440bdbf5632718d93c0a9
Publikováno v:
Energies, Vol 13, Iss 10, p 2493 (2020)
The impedance of a Lithium-ion (Li-ion) battery has been shown to be a valuable tool in evaluating the battery characteristics such as the state-of-charge (SOC) and state-of-health (SOH). Recent studies have shown impedance-measurement methods based
Externí odkaz:
https://doaj.org/article/10c7fe71697443cfae077462812f2e29
Autor:
Henrik Alenius, Tomi Roinila
Publikováno v:
Energies, Vol 13, Iss 8, p 2109 (2020)
Grid-connected systems often consist of several feedback-controlled power-electronics converters that are connected in parallel. Consequently, a number of stability issues arise due to interactions among multiple converter subsystems. Recent studies
Externí odkaz:
https://doaj.org/article/bca2005d9ec7435092755063338c7140
Publikováno v:
Energies, Vol 13, Iss 5, p 1173 (2020)
Rapidly increasing demand for renewable energy has created a need for the photovoltaic and wind farms to be placed in various locations that have diverse and possibly time-variant grid conditions. A mismatch between the grid impedance and output admi
Externí odkaz:
https://doaj.org/article/a9db94370c9b4dbb941cffbbf3dac35f
Autor:
Tomi Roinila, Xiao Yu, Jarmo Verho, Tie Li, Pasi Kallio, Matti Vilkko, Anran Gao, Yuelin Wang
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 5, Iss 1, Pp 964-972 (2014)
Silicon nanowire-based field-effect transistors (SiNW FETs) have demonstrated the ability of ultrasensitive detection of a wide range of biological and chemical targets. The detection is based on the variation of the conductance of a nanowire channel
Externí odkaz:
https://doaj.org/article/a13c35b6f390423c932de731978625fd