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Stability issues with network Impedances & its mitigation in Islanded Microgrids

  • The paper presents the effect of network impedances on the transient stability of Low Voltage (LV) microgrids intended for islanded operation. A simulation model is developed using simplified models of Distributed Generations (DGs). These simplified models are used to simulate electrical (excluding switching) as well as control dynamics for each DG to setup and facilitate system level simulations [1]–[3]. The paper focuses on the operation of DGs in grid forming mode using a droop based primary control. This approach is applied on a real microgrid which is set up within the pebbles research project framework. These DGs are connected through cable impedances to a resistive load bank at the point of common coupling (PCC). The effect of varying individual impedances between DGs and PCC under loading conditions on the microgrid stability is investigated. The location of load between DGs and its impact is also discussed. Finally, a control modification utilizing concept of virtual impedances (VIs) in Voltage Source Inverters (VSI) isThe paper presents the effect of network impedances on the transient stability of Low Voltage (LV) microgrids intended for islanded operation. A simulation model is developed using simplified models of Distributed Generations (DGs). These simplified models are used to simulate electrical (excluding switching) as well as control dynamics for each DG to setup and facilitate system level simulations [1]–[3]. The paper focuses on the operation of DGs in grid forming mode using a droop based primary control. This approach is applied on a real microgrid which is set up within the pebbles research project framework. These DGs are connected through cable impedances to a resistive load bank at the point of common coupling (PCC). The effect of varying individual impedances between DGs and PCC under loading conditions on the microgrid stability is investigated. The location of load between DGs and its impact is also discussed. Finally, a control modification utilizing concept of virtual impedances (VIs) in Voltage Source Inverters (VSI) is proposed to improve the transient stability of the discussed microgrid.show moreshow less

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Metadaten
Author:Nauman Beg, Helmuth Biechl, Argo RosinORCiD
Identifier:978-3-8007-5152-5 OPAC HS OPAC extern
Identifier:978-3-8007-5153-2 OPAC HS OPAC extern
Parent Title (English):NEIS 2019 Conference on Sustainable Energy Supply and Energy Storage Systems
Publisher:VDE
Place of publication:Berlin
Editor:Detlef Schulz
Document Type:conference proceeding (article)
Conference:NEIS 2019 Conference on Sustainable Energy Supply and Energy Storage Systems, 19 – 20 September 2019, Hamburg, Germany
Language:English
Year of first Publication:2019
Number of pages:6 Seiten
First Page:189
Last Page:194
Institutes:Fakultät Elektrotechnik
IEES - Institut für Elektrische Energiesysteme
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 60 Technik
6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften
Research focus:FSP1: Energie
Publication Lists:Biechl, Helmuth
Publication reviewed:begutachtet
Release Date:2021/02/01
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