Control of VSC-HVDC

Generally, for a VSC-HVDC system, there are three control modes: a) constant DC voltage control; b) constant DC current or active power; c) constant AC voltage control (Asplund, 2000; Flourentzou, Agelidis et Demetriades, 2009; Sood, 2004). In mode a) and...

Bandwidth Extension Techniques of Bone Conducted Speech

Originating from bone and tissue conduction, the quality of BC speech must be enhanced by artificially extending its frequency bandwidth int the higher frequencies (2-4 kHz). There are many different techniques that could be used to extend the bandwidth of...

Types of atmospheric icing accretion

Atmospheric icing is a generic term for all types of accretion of frozen water substance [1] [25]. Various processes where water in various forms in the atmosphere freezes and adheres to objects exposed to the air. In general, the atmospheric...