Plus: Man Utd have completed a £48m deal for Andrey Santos and are closing in on Aston Villa's Youri Tielemans after a move for Ederson was put on hold; Aston Villa have a quartet of wingers on their ...

Abstract: The increasing penetration of distributed photovoltaics (PVs) brings volatility and uncertain power outputs to micro-grids. Larger local regulation capacity is needed for maintaining the ...