Science Daily September 5, 2023 A simultaneous wireless information and power transfer (SWIPT)-enabled nonorthogonal multiple access (NOMA) system has been recognized as a promising technology for enabling the Industrial Internet of Things (IIoT), as it extends the lifetime of small battery-driven sensors. However, its energy efficiency significantly decreases with distance from the central controller. Researchers in South Korea proposed a framework for applying SWIPT-aided NOMA system to a distributed antenna system (DAS) to improve the spectral efficiency and energy efficiency of the IIoT. They optimized the power allocation for the NOMA signaling and power splitting for SWIPT in the DAS […]
Tag Archives: Power management
New system uses wind turbines to defend the national grid from power cuts
EurekAlert June 19, 2020 Frequency control to raise frequency nadir and eliminate frequency second dip is highly desirable for power grids with high penetration of wind energy. In order to achieve similar frequency support performance and ensure stability of wind turbine systems (WTSs) under varying wind speeds, different levels of wind power penetration and system conditions, researchers in the UK propose a fast frequency support scheme, an adaptive gain which is a function of real-time rotor speed and wind power penetration level. Rotor speeds of WTSs are proposed not to be recovered to the optimal operating points during the primary […]