Robust Frequency Control of Microgrids: A Mixed <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <msub> <mrow> <mi mathvariant="script">H</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> <mo>/</mo> <msub> <mrow> <mi mathvariant="script">H</mi> </mrow> <mrow> <mi>∞</mi> </mrow> </msub> </math> Virtual Inertia Emulation
International transactions on electrical energy systems