The document discusses synthetic inertia and the challenges posed by integrating renewable energy sources like PV plants into the electric grid. It notes that inverters do not provide inherent inertial response and that the short circuit ratio at the point of interconnection determines system stability with different levels of inertia and RES penetration. It recommends maintaining a short circuit ratio above 5 at the point of interconnection for renewable energy integrated at the medium voltage level.

1. SYNTHETIC INERTIA
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 PV Plant and other RES integration into a grid may pose challenges in terms of Frequency response.
 Inverters have actually no inherent inertial response.
 Short Circuit Ratio at the point of Interconnection (POC) determines the stability of the interconnected
system with combination of System Inertia and RES penetration.
 Minimum SCR shall be maintained > 5 at the POC for any RES integration at MV Voltage level.

2. SYNTHETIC INERTIA
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3. SYNTHETIC INERTIAL RESPONSE
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4. SYNTHETIC INERTIA – GRID vs Micro GRID
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5. August 2020 5
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