Effects of DC Bias on power transformers

Summary

The brochure examines the impact of DC bias (including geomagnetically induced currents, GIC) on power transformers and provides guidance on proving the transformer’s withstand capability. It is written as a comprehensive guide, organized into eight systematically structured chapters, each addressing a specific topic such as Sources of DC bias, Effect of DC/GIC on power transformer, Modelling of the thermal response, DC testing setups for power transformers, Modelling transformers in power system studies, Design considerations, Monitoring and mitigation and Accessories.

Additional informations

Authors

Dejan SUSA, Convenor (NO), Johannes RAITH, Secretary (AT)

ZhongRong XU (NL), Dietrich BONMANN, TF Leader (DE), Gary HOFFMAN (US), Geir Morten BJØRGVIK (NO), Reigh WALLING (US), Krishnat PATIL, TF Leader (US), Paul POUJADE (FR), Patrick PICHER (CA), Stefan TENBOHLEN (DE), Carsten KOCZULA (DE), Claes CARRANDER (SE), Seyed Ali MOSAVI (SE), Axel KRAEMER, TF Leader (DE), Thomas PESSO ( FR), Franjo KELEMEN (HR), Pedro LIMA (PT), Peter HAMBERGER (AT), Ke WANG (CN), Zamora BELVER INMACULADA (ES), Afshin REZAEI-ZARE (CA), Dongsheng GUO (UK), William RADASKY, TF Leader (US)

Corresponding Members

Ramsis GIRGIS (US), Wesley TEREK (US), Seung-Wook LEE (KR), Olve MO (NO), Ener SALINAS (SE), Paul JARMAN (UK), Álvaro PORTILLO (UY), Nad MOODLEY (ZA)

Keywords

Power transformer, GMD, GIC, DC bias, Saturation, Magnetization current, Design considerations and modelling, Transformer temperatures, Testing, Mitigation techniques