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Mitigation of inverter-induced noncirculating bearing currents by introducing grounded electrodes into stator slot openings
(IEEE, 2020-12-23)
Modern converter-supplied AC motors are exposed to bearing currents. Despite extensive research and development, the industry still does not have a final solution with acceptable cost and high efficiency. This paper focuses ...
A life cycle environmental sustainability analysis of microbial protein production via power-to-food approaches
(Springer, 2020-09-21)
Purpose
Renewable energy produced from wind turbines and solar photovoltaics (PV) has rapidly increased its share in global energy markets. At the same time, interest in producing hydrocarbons via power-to-X (PtX) ...
Power quality and reactive power of water electrolyzers supplied with thyristor converters
(Elsevier, 2020-03-28)
Industrial water electrolyzers apply direct current in kiloampere ranges. Therefore, rectifiers are typically based on thyristors despite the high amplitude current fluctuation excited by the rectifier. This paper studies ...
Mitigating noncirculating bearing currents by a correct stator magnetic circuit and winding design
(IEEE, 2020-04-06)
Different mechanisms by which bearing currents flow inside the electrical machine are well studied. In contrast, investigation and development of different techniques to mitigate these currents remain a field for improvement, ...
Power quality estimation of water electrolyzers based on current and voltage measurements
(Elsevier, 2019-12-23)
The ripple of the supplied direct current has a significant effect on the energy efficiency of the water electrolyzer cell. Hydrogen production is defined by the current mean value, but current harmonics generate additional ...
Techno-economic viability of energy storage concepts combined with a residential solar photovoltaic system: A case study from Finland
(Elsevier, 2021-06-05)
Solar photovoltaic systems have been growing in popularity in prosumer households as a means of increasing the share of renewable energy and decreasing electricity import. The available self-consumption is, however, limited ...
Pilot-scale in situ water electrolyzer with an improved fluid flow and modified electrodes for upscaling hybrid biological–inorganic systems
(Elsevier, 2021-06-22)
Anthropogenic emissions of CO2 and other greenhouse gases have increased since the pre-industrial era, driven largely by economic and population growth, and are now higher than ever. In this scope, hybrid biological–inorganic ...
Comparison of thyristor and insulated-gate bipolar transistor -based power supply topologies in industrial water electrolysis applications
(Elsevier, 2021-02-14)
The demand for green hydrogen is growing as the increasing production of pure hydrogen can no longer be based on fossil hydrocarbons. As water electrolysis would move from niche to a significant consumer of emission-free ...
Effect of power quality on the design of proton exchange membrane water electrolysis systems
(Elsevier, 2020-09-29)
Water electrolyzer technologies may play a key role in the decarbonization of the fossil-fueled world economy. Electrolytic hydrogen production could bridge emission-free power generation and various energy end-use sectors ...
Technical feasibility evaluation of a solar PV based off-grid domestic energy system with battery and hydrogen energy storage in northern climates
(Elsevier, 2020-12-10)
Self-sustaining off-grid energy systems may require both short-term and seasonal energy storage for year-around operation, especially in northern climates where the intermittency in both solar irradiation and energy ...