Читать книгу Smart Solar PV Inverters with Advanced Grid Support Functionalities - Rajiv K. Varma - Страница 42

As solar PV systems increasingly displace conventional synchronous generators, the amount of short circuit current capability in the power system decreases resulting in weak grids [16]. The stability of inner current control loops and the phase‐locked loop declines when inverters are connected to networks which are weak, i.e. where the network voltage is susceptible to substantial variability. Low short circuit levels may also cause challenges in disconnecting solar PV systems during unintentional islanding scenarios.