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Definition of a Voltage-Source Converter dc-side admittance and its impact on dc-network stability

Gustavo Pinares (Institutionen för energi och miljö, Elteknik) ; Massimo Bongiorno (Institutionen för energi och miljö, Elteknik)
9th International Conference of Power Electronics 2015, Seoul; South Korea, June, 1-5, 2015 p. 2072-2078. (2015)
[Konferensbidrag, refereegranskat]

The aim of this paper is to provide a definition of a parameter that can be used for the study of the dc-network dynamics in VSC-HVDC systems. Through an appropriate selection of subsystem within a point-to-point VSC-HVDC system, a dc-side power dependent admittance is defined. The particularity of this admittance is that, if negative, there is a risk that a dcside resonance becomes amplified. The dc-side power dependent admittance is measured in a EMT model and compared with a linearized mathematical model, showing good agreement between them. The usefulness of the defined admittance is shown through the assessment of various controller modifications on the dcnetwork stability enhancement. Finally, the conclusions from the analysis are verified through time domain simulations.

Nyckelord: dc-network stability, passivity



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Denna post skapades 2015-06-16. Senast ändrad 2016-11-25.
CPL Pubid: 218427

 

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Institutioner (Chalmers)

Institutionen för energi och miljö, Elteknik

Ämnesområden

Energi
Elektroteknik och elektronik
Elkraftteknik

Chalmers infrastruktur

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Analysis of dc-network stability of VSC-based HVDC grids