Stability of distribution grids with storage, generation ... · Folkhart Grieger Siemens CT Martin...
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15.10.2018 | FB 18 | Institute SRT / PE | Alexander Sauer | 1 LEA Stability of distribution grids with storage, generation units and comsumers mainly coupled through power electronics StabLe Grant No.: 0324101A
Transcript of Stability of distribution grids with storage, generation ... · Folkhart Grieger Siemens CT Martin...
15.10.2018 | FB 18 | Institute SRT / PE | Alexander Sauer | 1
LEA
Stability of distribution grids with storage, generation units and
comsumers mainly coupled through power electronics
StabLe
Grant No.: 0324101A
15.10.2018 | FB 18 | Institute SRT / PE | Alexander Sauer | 2
LEA
Research Consortium
[https://www.branchenbuchdeutschland.de
/images/startseite/deutschlandkarte.png]
Start of Projekt: April 2017
End of Project: March 2020
Grant No.: 0324101A
working on Medium Voltage
working on Medium Voltage
working on Low Voltage
working on Low Voltageand Medium Voltage
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Net electricity generation in Germany in 2018
[https://www.energy-charts.de/energy_pie.htm]
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Net electricity generation in Germany in 2018
[https://www.energy-charts.de/energy_pie.htm]
Transition to
Distributed Energy Generation with
Power Electronics and
Replacement of rotating inertias
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Key Scientific Questions
Main question: How does “power electronicization” of networks affect grid stability?
How can power electronics compensate for the reduction of rotating inertias, which will be one of the consequences
of a higher penetration with distributed energy?
What are suitable concepts for control of instantaneous and primary power?
Can the local grid impedance be used in order to stabilize control?
How needs the control design to be? Can a decentralized approach stabilize the grid, even with limited or restricted
communication capabilities?
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Low Voltage Grid – Cigré Reference
Lab Setup with a 3L+N-phase system to analyze control
behaviour under possible conditions (pos., neg. and zero
sequence)
Connected to LV grid (400 kVA / 400 V) at TU Darmstadt
Islanding possible through switch
6 x 16 kVA S120 Siemens Converters
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Frequency and Voltage Control
Preise, Mengen,
Parameter
OP, Parameter
Synchronous Machine Power Converter
efd
|E|, ωPQ-Control
Current Control, PWM,
Impedance EstimationPm,soll
Turbine
Pm
PLL, PQ-Control
P, Q P, Q
State Estimation,
Fault Detection
OP, Parameter
System Level
Power Flow
MPC 1 MPC n
Controller Parameter
Design of PQ-
ControlMarket Maker
Power Flow Planning
Ireference
Iabc
Primary Control
SecondaryControl andOptimizationof Primary Control
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Why Impedance Measurement?
[R. Teodorescu, M. Liserre und P. Rodriguez, Grid converters for photovoltaic
and wind power systems. Piscataway N.J., Chichester West Sussex, Hoboken
N.J.: IEEE; Wiley, 2011.]
Variation of Grid Impedance over the course of the day
[Prof. Dr.-Ing. Holger Borcherding, „Abschlussbericht zum Projekt NENEP: Netzrückwirkungen von Netzpulsstromrichtern im Einzel- und Parallelbetrieb in industriellen und öffentlichen Netzen“, Hochschule Ostwestfalen-Lippe im Labor Leistungselektronik und elektrische Antriebe., Lemgo, Mai. 2011.]
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Medium Voltage Converter Structure
110 kWh / 300 kW Li-Ion
Battery
~840 Wh / 300 kW
Li-Capacitor Storage
Coupled via transformer to
medium voltage grid
Power Sharing dependent
on dynamics
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Medium Voltage Grid – Real grid close to Wolfsburg
Inertia available by utilities
Frequency Stability out of scope
here
Battery Converter acts as grid
supporting storage
Voltage Stability provided by
control of P and Q
Control Strategy has to take State
of Charge into account
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Thank you for your attention!
We are eager to continue reasearch
in partnership with you!
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Participants
Fraunhofer IISBMarkus GeppVincent LorentzAndreas LukaschikThomas Heckel
IAVMichael SchollmeyerLars KochNils FalkeFolkhart Grieger
Siemens CTMartin HergtSebastian Nielebock
TU DarmstadtJutta HansonChristina FuhrDominik MaihöfnerAlexander SauerGerd GriepentrogUlrich KonigorskiBernhard Hammer
Contact
Technische Universität Darmstadt
Institut für Stromrichtertechnik und Antriebsregelung
Fraunhoferstr. 4
D 64283 Darmstadt
Prof. Dr.-Ing Gerd Griepentrog
+49 6151 16 20585
Alexander Sauer, M.Sc.
+49 6151 16 20592
www.lea.tu-darmstadt.de
