THE INTEGRATED SWITCHING CONTROL STRATEGY FOR GRID-CONNECTED AND ISLANDING OPERATION OF MICRO-GRID INVERTERS BASED ON A VIRTUAL SYNCHRONOUS GENERATOR

In allusion to the virtual synchronous generator (VSG)-based voltage source inverters in micro-grids, an integrated control method combining a quasi-synchronization algorithm and an islanding detection algorithm is proposed to improve the power supply reliability and quality, which can simultaneously meet the operational requirements of both grid-c

There has long been consensus among scholars that the altarpiece in Hedalen Stave church in Valdres once was a medieval tabernacle, housing a wooden sculpture of the Virgin Mary.The over-painted altarpiece is Legging Set today composed of the tabernacle corpus and wings, plus a crucifix.The later paint is from the second half of the 18th century.Th

In recent years, small earthquakes around Huxian, near the Qinling Piedmont Fault (China), have attracted much attention from the local government.Due to the blindness to the characteristics of Huxian ground deformation, it is highly desirable to conduct ground deformation surveys in this area, as well as study the relationship between ground defor

It has been suggested that incongruence between signals for motor intention and sensory input can cause pain and other sensory abnormalities.This claim is supported by reports that moving in an environment of induced sensorimotor conflict leads to elevated pain and sensory symptoms in those with certain painful conditions.Similar procedures can lea

The cultivation of wheat has been part of the evolution of human civilisation since ancient times.Wheat breeding has modified some of its characteristics to obtain improved varieties with high production potential that better Unite Warriors meet the demands of the bread and pasta industry.Even today, there are still old varieties, landraces, adapte