Summary
For HVAC overhead power lines, the audible noise emission due to corona discharges of naturally aged conductors during rain is much lower than that of new ones. Unexpected high noise levels after installing new conductors can cause annoyance and poses a challenge to social compliance and acceptance of overhead lines. In this contribution, we describe the phenomenon quantitatively, reveal the mechanisms that lead to excessively high noise levels and propose countermeasures. Audible noise data for conductors of various age (new and ex-service) is presented. Surface-chemical analysis is applied to various conductors, revealing the role of chemical conversion and the removal of contaminants such as lubricants. It is shown that the chemical reactions are likely to be mainly driven by corona discharges and can be mimicked by applying a flame or plasma treatment to new conductors. The results are being validated by means of acoustic measurements and visualized by spray tests. As immission control in
Read more Read lessGermany and Switzerland focuses on high emissions during rain, the dry case is not considered.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B2_12491_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Germany |
| Study committees | |
| File size | 2 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
SCHRÖDER Benjamin - Amprion GmbH Germany; MÖLLENBECK Saskia - Amprion GmbH Germany; GIT Paul - TH Deggendorf Germany; SCHILLAI Kilian - Swissgrid Switzerland; GIT Paul - TH Deggendorf; KIRCHNER Hannah - Hitachi Energy Ltd Switzerland; PISCHLER Oliver - TU Graz Austria
Keywords
audible noise, corona discharges, overhead line conductors, surface analysis
