Microprocessor-Based Algorithm for Symmetrical-Components Calculation
Article Abstract:
A microprocessor-based algorithm calculates symmetrical components from the distorted transient voltage and current signals in a power system. The fast and efficient algorithm extracts fundamental frequency components of the three-phase signal using Haar functions and then applies symmetrical-component tranformation. The algorithm is suited to application in protection schemes of synchronous and induction machines. The frequency response of the algorithm and sequence components are illustrated.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1983
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Microprocessor implementation of fast Walsh-Hadamard transform for calculation of symmetrical components
Article Abstract:
A fast, accurate microprocessor-based algorithm is developed that uses the Fast Walsh-Hadamard Transform (FWHT) for the calculation of the symmetrical components after a fault occurrence in a three-phase power system. The algorithm samples an input signal at 800MHz, calculates the symmetrical components, and applies the FWHT to filter out the signal's harmonic components. Three sequence components can be calculated in three-fourths of a cycle after fault occurrence.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1988
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