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D.-L. Schultis:
"Effective Volt/Var Control for Low Voltage Grids with Bulk Loads";
ENERGIES, 15 (2022), 1 - 30.

This paper investigates the voltage and reactive power control problem in low voltage
grids with connected prosumers and bulk loads. The X(U) local control, which maintains the voltage
at the feeders´ ends within a predefined band, and its combination with Q-Autarkic customer plants
are the most effective and reliable strategies in grids with high prosumer share. However, these
strategies may need adaptations to guarantee voltage limit compliance when bulk loads, such as
electric vehicle parking garages and community-owned photovoltaic systems, are connected to the
low voltage feeders. This paper extends the X(U) local control concept to involve bulk loads in
Volt/var control and investigates the resulting load flows in different real low voltage grids. The
results show that the extended control arrangement reliably removes all voltage limit violations by
deteriorating the effectiveness of the original X(U) local control arrangement: reactive power flows
and equipment loading within the low voltage grids are increased.

low voltage grid; energy community; Volt/var control; photovoltaic; electric vehicle charger; X(U) local control; CP_Q-Autarky; bulk load

http://dx.doi.org/10.3390/en15051950

https://publik.tuwien.ac.at/files/publik_303548.pdf

Project Head Albana Ilo:
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