Hybrid Digital differential Protection of Power Transformers

Hybrid Digital differential Protection of Power Transformers

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This book introduces a new dqWPT-based hybrid technique for the protection of power transformers to be integrated with the operation and control circuits without affecting their performance. The dq axis components and the WPT are combined to provide a new hybrid technique. It is defined as the dqWPT hybrid protection system for power transformers. This hybrid technique is tested by off-line simulation and verified experimentally for two laboratory power transformers. The tests show good results for all types of faults and inrushes including CT saturation, mismatches, external faults, and over-...