Stability of Fast Q(U) Voltage Droop Control ofWind Parks in High Voltage Distribution Grids

Konferenz: NEIS 2017 - Conference on Sustainable Energy Supply and Energy Storage Systems
21.09.2017 - 22.09.2017 in Hamburg, Deutschland

Tagungsband: NEIS 2017

Seiten: 7Sprache: EnglischTyp: PDF

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Hau, Melanie; Shan, Martin (Fraunhofer Institut für Windenergie und Energiesystemtechnik, Kassel, Germany)

In order to allow for the participation of wind parks in primary voltage control of the network, a fast voltage droop control, e.g. Q(U), is required. As droop control is potentially oscillatory, the control has to be designed carefully. We illustrate the influence of the basic system parameters on stability of Q(U)-controlled wind parks. An analytic relation between stability and these basic parameters is derived and we introduce a simple rule of thumb for pre-designing a wind park Q(U) control. Furthermore, the stability of a decentralized control system formed by several parks in the same grid region is analyzed and the influence of cross-coupling between them is illustrated.