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Analysis of the dc Dynamics of VSC-HVDC Systems Using a Frequency Domain Approach

Gustavo Pinares (Institutionen för energi och miljö, Elteknik) ; Tuan Le (Institutionen för energi och miljö, Elteknik) ; Claes Breitholtz (Institutionen för signaler och system, Reglerteknik) ; Lina Bertling Tjernberg
IEEE PES Asia-Pacific Power and Energy Engineering Conference 2013, 8-11, December 2013, Hong Kong, China (2013)
[Konferensbidrag, refereegranskat]

In this paper, the dc dynamic performance of VSC-HVDC systems is investigated using the frequency domain approach. In a previous work, it has been found through the eigenvalue analysis that, in some situations, the VSC-HVDC system becomes unstable when the converter which controls the direct-voltage injects power exceeding a certain value. However, the cause of the instability was not addressed. This paper attempts to answer some of the remaining questions in the previous work through the frequency response of the elements that compose the system. In order to facilitate the analysis, appropriate assumptions have been made. The transfer function of both, dc grid and the converter which controls the direct-voltage are derived. The results from the analysis shows that, depending on the direction of the power, the frequency response of the converter has a negative resistance characteristic which amplifies resonances in the dc grid.

Nyckelord: HVDC, VSC, Eigenvalue Analysis, Frequency Domain Analysis

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Denna post skapades 2014-01-17. Senast ändrad 2014-08-28.
CPL Pubid: 192778


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Institutioner (Chalmers)

Institutionen för energi och miljö, Elteknik
Institutionen för signaler och system, Reglerteknik



Chalmers infrastruktur

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