PUBLISHED PAPERS #10.04
| Ismayil Ismayilov. Study of Partial Discharge Propagation Impact on Stator Dissipation Factor in High Voltage Turbine Generator |
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| Abstract. High voltage rotating equipment, such as power generators, relies on robust stator insulation. Partial discharge and dissipation factor measurements are widely used for insulation diagnostics, yet their effectiveness in detecting early-stage deterioration remains a topic of debate. This study evaluates the correlation between partial discharges and dissipation factor in a turbine generator by analyzing field measurement data over two consecutive years (2023–2024). While dissipation factor values exhibited only a minor increase, partial discharges activity showed a significant rise, indicating substantial insulation degradation. The results highlight the limitations of dissipation factor as a sole diagnostic parameter and emphasize the necessity of integrating partial discharges assessments for a comprehensive evaluation of insulation health. Findings suggest that relying exclusively on dissipation factor may overlook critical defects, potentially leading to unexpected failures. This study reinforces the importance of combining partial discharges and dissipation factor measurements to enhance the accuracy of insulation condition monitoring in HV rotating machinery. |
| Keywords: High-voltage, partial discharge, PD calibration, dissipation factor, stator insulation, power generators, predictive maintenance, high frequency current transformers |
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| DOI: https://doi.org/10.30546/MaCoSEP2025.090 |