Due to a limitation in the magnitude of three-phase output inverter currents, active power photovoltaic (PV) unit has been de-rated during low voltage ride through, which brings great instability risk system. With increase penetration rate new energy, impact shortage on system transient stability increases. It is significance analyze this stability. This article explores methods improve capabil...

The aim. To examine the features of structural and functional changes heart in patients with chronic failure preserved left ventricular ejection fraction (CHF pr EF) excess body weight depending on presence form atrial fibrillation (AF). Materials methods. study involved 248 CHF EF weight, mean age was 65.0 ± 11.0 years, 146 females (58.9 %) 102 males (41.1 %). first group included 181 without ...

Wind energy is expected to play a crucial role in the energy mix in the future society with limited access to fossil fuels. Wind turbines with larger power rating are being installed every year, making possible to extract more energy from wind. In countries where wind power has become a relevant part of the total generated electrical power production, transmission system operators (TSOs) have i...

In order to help the readers stay up-to-date in field, each issue of Progress Photovoltaics will contain a list recently published journal articles that are most relevant its aims and scope. This is drawn from an extremely wide range journals, including IEEE Journal Photovoltaics, Solar Energy Materials Cells, Renewable Energy, Sustainable Reviews, Applied Physics Letters. To assist readers, se...