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The Harmonic Spectra of Interharmonics

Date: Thursday, August 26th, 2010

Location: SRP Information Services Building (ISB), 1600 N Priest Dr, Tempe, AZ 85281

Speaker: Gary Malhoit, SRP

Topic: "The Harmonic Spectra of Interharmonics"

This month’s topic addresses a lesser known area of power quality referred to as interharmonics. For background, a brief overview of harmonics is discussed then the dialog rapidly shifts to interharmonics. The topic includes a conversation on the importance of understanding the DFT window as related to interharmonics and discusses the sources, issues, allowed magnitudes and standards concerning interharmonics. Further, the topic covers measurements issues regarding interharmonics. Finally, there is a discussion addressing the IEC grouping standard for measuring harmonic spectra.

Speaker Bio:
Gary Malhoit is a Senior Engineer in the Power Quality Group of SRP. Prior to coming to SRP, Gary's career included working in various engineering positions at NCR, Bechtel and Motorola. While at Motorola nearly 20 years, he wrote numerous technical articles for Motorola's Silver Quill program and was on the original working group of SEMI F47 for voltage sag immunity. Gary is currently a member of the IEEE 1668 working group for testing electrical equipment and a member of IEEE/PES. Gary has a BS in electrical engineering from of the University of Tennessee and an MBA from the University of Memphis. He is a registered electrical engineer in Arizona and licensed as a patent agent to prosecute patent cases before the United States Patent and Trademark Office.