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Analysis and mitigation of instabilities originated from dc-side resonances in VSC-HVDC systems

Gustavo Pinares (Institutionen för energi och miljö, Elteknik) ; Massimo Bongiorno (Institutionen för energi och miljö, Elteknik)
IEEE transactions on industry applications (0093-9994). Vol. 52 (2016), 4, p. 2807-2815.
[Konferensbidrag, refereegranskat]

Instabilities related to dc-side resonances can occur in Voltage Source Converters based HVDC (VSC-HVDC) when resonances originated in dc-transmission links coincide with a non-passive behavior of one of the VSCs within the VSC-HVDC system. Through Nyquist stability criterion, it is shown in this paper that, when the VSC that controls the direct voltage has a non passive behavior, the size of dc-side resonance peak has also a negative impact on the instability, i.e. the higher the resonance peak, the greater the risk of instability. Then, the impact of transmission link configurations on the dc-side resonance characteristic is investigated, including overhead transmission lines and dc-side filters. Based on the analysis presented in this paper, it is proposed that, around the dc-side resonance frequency, the magnitude of the VSC subsystem transfer function should be limited to the inverse of the resonance peak at highest. Finally, time-domain simulations show the effectiveness of the proposed countermeasure in stabilizing the system.

Nyckelord: Nyquist Stability Criterion, VSC-HVDC system, dc-network resonance, dc-side resonance peak, impedance frequency scan

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Denna post skapades 2016-04-08. Senast ändrad 2016-09-07.
CPL Pubid: 234385


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Institutioner (Chalmers)

Institutionen för energi och miljö, Elteknik


Annan elektroteknik och elektronik

Chalmers infrastruktur

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