US 12,216,178 B2
Fail-safe operating method for a decentralized power generation plant
Michael Viotto, Kassel (DE); Martin Putz, Kassel (DE); and Christian Tschendel, Kassel (DE)
Assigned to SMA Solar Technology AG, Niestetal (DE)
Filed by SMA Solar Technology AG, Niestetal (DE)
Filed on Jun. 13, 2022, as Appl. No. 17/838,630.
Application 17/838,630 is a continuation of application No. 16/893,276, filed on Jun. 4, 2020, granted, now 11,360,157.
Application 16/893,276 is a continuation of application No. PCT/EP2018/083229, filed on Nov. 30, 2018.
Claims priority of application No. 10 2017 129 083.4 (DE), filed on Dec. 6, 2017.
Prior Publication US 2022/0373613 A1, Nov. 24, 2022
Int. Cl. G01R 31/52 (2020.01); G01R 31/64 (2020.01); G01W 1/10 (2006.01); H02J 3/00 (2006.01)
CPC G01R 31/52 (2020.01) [G01R 31/64 (2020.01); G01W 1/10 (2013.01); H02J 3/004 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A method of operating a decentralized power generation plant (DG), comprising:
prior to connecting the DG to a grid, applying at least two voltage values to connecting lines of a generator of the DG,
determining a leakage capacitance of the generator of the DG based on currents or current transients caused by the application of the at least two voltage values, and
selectively connecting the DG to the grid based on the determined leakage capacitance.