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Investigation into dynamic and static frequency and voltage stability of embedded island grids using battery-hybrid-systems
Publikationstyp
Conference Paper
Date Issued
2020
Sprache
English
Author(s)
Institut
TORE-URI
Start Page
90
End Page
96
Citation
NEIS 2018; Conference on Sustainable Energy Supply and Energy Storage Systems, Hamburg, Germany, 2018, pp. 1-7.
Contribution to Conference
Publisher Link
Scopus ID
Publisher
VDE
This article presents a novel approach for island operation of German low-voltage (LV) grids with high share of photovoltaic (PV) and charging stations for electro mobility (EM). For this purpose, suitable dynamic system models have been developed. This allows the simulation of dynamic events in very small time ranges and the operation management over longer periods of time. In order to proof the assumptions, which were made for the simulation, a LV-grid test bench has been implemented (Figure 4) at the University of Technology Hamburg. It is shown that the frequency and voltage stability can be ensured by the installed grid forming inverters, even for high load steps. An operation strategy has been developed, which makes it possible to operate the LV-grid in island mode without using additional information and communication technology (ICT). For this purpose, a battery hybrid system (BHS) connected to the bus bar operates as a grid forming unit. Furthermore a voltage analysis of rural radial LV-grids has been accomplished by simulating critical days of the year and a bus-bar-voltage control algorithm has been developed.
Subjects
Battery-Hybrid-System
Frequency stability
Island-grids
Low-voltage grids
Voltage analysis