On-site PD Diagnostics, FRA and Moisture Measurement for Power Transformers

Abstract

The paper presents three methods for condition assessment of power transformers which can be applied on-site. A combination of UHF and acoustic partial discharge (PD) measurement methods enables to detect PD in power transformers and to improve interpretation and localisation of their sources. Frequency response measurements are a widely applied technique for power transformer winding deformation detection. Dielectric response methods deliver results about the moisture condition of a transformer.