Microprocessor-based relay for protecting power transformers
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The paper describes the design, implementation and testing of a microprocessor-based relay for protecting single-phase and three-phase transformers. The relay implements algorithms that use nonlinear models of transformers to detect winding faults. The algorithms, hardware and software are also briefly described. The performance of the relay was checked in the laboratory. The testing procedure and some test results are also presented in the paper.
[1] A. G. Phadke,et al. A New Computer-Based Flux-Restrained Current-Differential Relay for Power Transformer Protection , 1983, IEEE Power Engineering Review.