On harmonic pollution metering: field validation of index-based emission assessment

Harmonic pollution metering based on distortion indices are evaluated using field data obtained at a large industrial plant where the performance of harmonic filters is unknown. It is shown that by application of a fuzzy inference approach and a global harmonic distortion index, that a better understanding of contractual obligations to harmonic emission can be realized. Measurement uncertainty requires careful consideration when using field data. Tuning of fuzzy variables have to reflect the specific network under investigation.