Response of low voltage networks with high penetration of photovoltaic systems to transmission network faults

Conference paper (2014)
Department
Electrical Sustainable Energy (EEMCS) (TU Delft)
Copyright: IEEE
DOI: https://doi.org/doi:10.1049/cp.2014.0912
More Info
expand_more

Published Date

24-09-2014

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Source:

RPG 2014: 3rd Renewable Power Generation, Naples, Italy, 24-25 September 2014

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Abstract

The installed capacity of photovoltaic (PV) systems connected to low voltage (LV) networks in Germany has increased to more than 25 GW. Current grid codes still mandate these PV systems to disconnect in case of voltage dips below 0.8 p.u. The resulting response of LV distribution systems with high penetration of PV systems to faults in the transmission network is investigated for an integrated power system model that comprises all relevant voltage levels. Sensitivity studies with respect to the pre-fault power flow, various steady state and fault ride-through (FRT) control modes were performed. Our simulations for a realistic 2022 scenario show that a lack of FRT capability can cause the distribution system load to increase by 35-70 % of its peak value. It was found that for under-excited operation of PV systems prior to the fault, an overvoltage can occur post-fault at some busbars in the distribution system. Therefore, we conclude that new LV-connected PV systems and other DG installations should be requested to perform FRT.

Files

Boemer_2014.pdf
(pdf | 0.654 Mb)