Stray capacitance and compensation for the converter valves for ultra-high voltage HVDC application

Xiao, Shun; Cao, Junzheng; Donoghue, M.W.

doi:10.1109/powercon.2010.5666452

Cited by 8 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even though the parameter extraction of a valve tower is a complex topic, an accurate model must be used to well predict the behavior of the converter and to design suitable passive circuits to suppress overvoltages and to protect from unacceptable currents in the thyristor series [2]. Analytical methods to extract the stray capacitances of the valve and studies on their effects on thyristors' behavior have been developed, [3] - [4]. To improve the accuracy of detailed models, the circuit parameters can also be extracted by means of finite element and accurate numerical simulations [5].…”

Section: Introductionmentioning

confidence: 99%

Development and Validation of a Smart Architecture for Thyristor Valves

Sala

Bonis²,

Costabeber

et al. 2023

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

A high voltage thyristor converter is realized by many valve sections, whose volume is approximately occupied for only the 10% by thyristors and for the 10% by the relevant gate drivers. The remaining 80% is taken by passive auxiliary circuits, needed to protect thyristors during turn-on and turn-off commutations. This work represents a preliminary validation of an innovative architecture that aims to reduce the auxiliary circuit cost, volume, and weight of the overall valve, through the investigation of active, instead of passive solutions. The work starts from investigation of the phenomena behind the valve transient behaviors and proceeds with simulations and experimental tests, using a reduced scale circuit prototype. The match between the obtained results validates the investigated active configurations, confirming that the proposed solution can be used for improving thyristor valves.

show abstract