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This paper presents the power system fault calculation model for multi-circuit lines with mutual zero-sequence impedance and describes the procedure of the common and integrated node zero-sequence admittance matrix. It makes the complex fault calculation be able to extend faulted location into the inside of coupling lines. The transformation for 4-circuit coupling lines from sequence-component model...
A method to test the transient performance of a sampled-data relay is given. A model of one measuring unit of a digital relay is created on a personal computer. The simulations are compared with laboratory results obtained by applying digitally generated waveforms to the actual relay. Computer modeling of the digital relay is done within the models version of the Transient Analysis of Control System...
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