Open access
Date
2018-02Type
- Journal Article
Abstract
This publication investigates the corona generated ion flow environment in bipolar HVDC and hybrid AC/DC transmission systems. The emphasis is on the DC ion current magnitude in the conductors. In DC conductors this constitutes the corona power loss, while in AC conductors this quantity is primarily of concern due to the risk of transformer saturation. Existing prediction methods are compared to full-scale test data from the literature and new laboratory measurements. It is shown that the bipolar HVDC and hybrid AC/DC ion flow phenomena are similar in the sense that mutual space-charge related surface field enhancements are a dominant factor in the determination of the total conductor ion currents. Furthermore, in a hybrid AC/DC environment, the existence of a net DC ion current stemming from the AC conductor is verified and explained. Limitations of existing prediction methods are demonstrated and recommendations for future work is given. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000168489Publication status
publishedExternal links
Journal / series
IEEE Transactions on Power DeliveryVolume
Pages / Article No.
Publisher
IEEESubject
HVDC; Hybrid AC/DC; Corona; Corona losses; Space charges; Ion flowOrganisational unit
03869 - Franck, Christian / Franck, Christian
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