On Aggregation Requirements for Harmonic Stability Analysis in Wind Power Plants

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

In harmonic stability studies, stable operation of a power system must be ensured at any possible configuration. This leads to a large number of cases due to the high number of components in a power system. An aggregated model can be used to lower the complexity and to reduce the number of different cases. In other words, several similar converters (e.g. Wind Turbine Generators) can be replaced by a converter with larger ratings. In most cases, aggregated models work well for stability studies, however, in some cases the aggregation might result in a wrong evaluation of stability. The aggregation reduces the complexity of the system by removing some statevariables of the overall system matrices; however, sometimes these removed variables contain some important information about the stability of the system. In this paper this problem is shown by a case study and it is evaluated by different methods, and a solution is also proposed.
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In harmonic stability studies, stable operation of a power system must be ensured at any possible configuration. This leads to a large number of cases due to the high number of components in a power system. An aggregated model can be used to lower the complexity and to reduce the number of different cases. In other words, several similar converters (e.g. Wind Turbine Generators) can be replaced by a converter with larger ratings. In most cases, aggregated models work well for stability studies, however, in some cases the aggregation might result in a wrong evaluation of stability. The aggregation reduces the complexity of the system by removing some statevariables of the overall system matrices; however, sometimes these removed variables contain some important information about the stability of the system. In this paper this problem is shown by a case study and it is evaluated by different methods, and a solution is also proposed.
Original languageEnglish
Title of host publicationProceedings of 16th Wind Integration Workshop
Number of pages4
PublisherEnergynautics GmbH
Publication dateOct 2017
Publication statusPublished - Oct 2017
Publication categoryResearch
Peer-reviewedYes
Event16th Wind Integration Workshop - Berlin, Germany
Duration: 25 Oct 201727 Oct 2017

Conference

Conference16th Wind Integration Workshop
LandGermany
ByBerlin
Periode25/10/201727/10/2017

    Research areas

  • Aggregation, Harmonic stability, Model Order Reduction, Voltage Source Converter, Wind Power

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