Overview of the reference point in a system

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System overview with different electrical reference points

In the technical connection conditions, a distinction is typically made as to whether the requirements relate to the point of interconnection (M1) or to the inverter terminals (M2). The grid operator or the locally applicable regulations regarding the point of interconnection determine the reference point for your system. For further information on this subject, see the Technical Information "SMA GRID GUARD 10.0 - Grid Management Services via Inverter and System Controller".

Reference point

Explanation

M1

Reference point is the point of interconnection (POI)

M2

Reference point are the terminals of the inverter (generation unit (PGU))

    Closed-loop control
    Prioritizing active power setpoints