--- title: Harmonic Calculations description: Harmonics and interharmonics may be computed by using a DFT on the raw time series data. This frequency decomposition can analyze waveform distortion. image: https://library.powermonitors.com/hubfs/White_Papers/White%20Paper%20Header%20Images/Harmonic%20Calculations.png --- [![PMI_Logo_White_Slogan](https://library.powermonitors.com/hs-fs/hubfs/Branding%20-%20Logos%20and%20Designs/PMI_Logo_White_Slogan.png?width=655&height=175&name=PMI_Logo_White_Slogan.png "PMI_Logo_White_Slogan")](https://powermonitors.com) [![PMI Logo: Tools you Need. People you Trust.](https://library.powermonitors.com/hubfs/PMI_Website/logo.svg "PMI Logo: Tools you Need. People you Trust.")](http://powermonitors.com) [![PMI Logo: Tools you Need. People you Trust.](https://library.powermonitors.com/hubfs/PMI_Website/logo.svg "PMI Logo: Tools you Need. People you Trust.")](http://powermonitors.com) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. - [Home](https://powermonitors.com) - [Products](https://powermonitors.com/products) - Library - Videos - [All](https://powermonitors.com/videos/) - [Bolt Quality Tests](https://powermonitors.com/videos/?video_search=&video_topic=bolt-quality-tests) - [Promotional Videos](https://powermonitors.com/videos/?video_search=&video_topic=promotional-videos) - [Support Videos](https://powermonitors.com/videos/?video_search=&video_topic=support) - [Power Quality Decoded](https://powermonitors.vids.io/tags/1f9bd9b6181b90/ask-a-pro) - White Papers - [All](https://library.powermonitors.com) - [All](https://powermonitors.com/whitepapers/) - [Artificial Intelligence](https://powermonitors.com/whitepapers/?whitepaper_search=Merlin&whitepaper_topic=) - [Case Studies](https://powermonitors.com/whitepapers/?whitepaper_topic=case-studies) - Communications - [All Communications](https://powermonitors.com/whitepapers/?whitepaper_topic=communications) - [Cellular Communications](https://powermonitors.com/whitepapers/?whitepaper_topic=cellular-communications) - [General Communications](https://powermonitors.com/whitepapers/?whitepaper_topic=general-communications) - [Distributed Generation](https://powermonitors.com/whitepapers/?whitepaper_topic=distributed-generation) - Products - [All Products](https://powermonitors.com/whitepapers/?whitepaper_topic=products) - [Boomerang](https://powermonitors.com/whitepapers/?whitepaper_topic=boomerang) - [Boomerang SCADA](https://powermonitors.com/whitepapers/?whitepaper_search=Boomerang+Scada&whitepaper_topic=) - [Box Recorder](https://powermonitors.com/whitepapers/?whitepaper_topic=box-recorder) - [Canvass](https://powermonitors.com/whitepapers/?whitepaper_topic=canvass) - [Eagle](https://powermonitors.com/whitepapers/?whitepaper_topic=eagle) - [Flex CT](https://powermonitors.com/whitepapers/?whitepaper_topic=flex-ct) - [Guardian](https://powermonitors.com/whitepapers/?whitepaper_topic=guardian) - [Merlin™](https://powermonitors.com/whitepapers/?whitepaper_search=Merlin&whitepaper_topic=) - [Meter Sockets](https://powermonitors.com/whitepapers/?whitepaper_topic=meter-sockets) - [PQ Canvass](https://powermonitors.com/whitepapers/?whitepaper_topic=pq-canvass) - [ProVision](https://powermonitors.com/whitepapers/?whitepaper_topic=provision) - [Revolution](https://powermonitors.com/whitepapers/?whitepaper_topic=revolution) - [TLAR](https://powermonitors.com/whitepapers/?whitepaper_topic=tlar) - [Using PMI Recorders](https://powermonitors.com/whitepapers/?whitepaper_topic=using-pmi-recorders) - [Harmonics](https://powermonitors.com/whitepapers/?whitepaper_topic=harmonics) - [IEEE Standards](https://powermonitors.com/whitepapers/?whitepaper_topic=ieee-standards) - Power Quality - [All Power Quality](https://powermonitors.com/whitepapers/?whitepaper_topic=power-quality) - [Analyzing Waveforms](https://powermonitors.com/whitepapers/?whitepaper_topic=analyzing-waveforms) - [Flicker](https://powermonitors.com/whitepapers/?whitepaper_topic=flicker) - [PQ Data Analysis](https://powermonitors.com/whitepapers/?whitepaper_topic=pq-data-analysis) - [PQ Theory](https://powermonitors.com/whitepapers/?whitepaper_topic=pq-theory) - Voltage - [All Voltage](https://powermonitors.com/whitepapers/?whitepaper_topic=voltage) - [CVR](https://powermonitors.com/whitepapers/?whitepaper_topic=cvr) - [Voltage Sag](https://powermonitors.com/whitepapers/?whitepaper_topic=voltage-sag) - [Voltage Unbalance](https://powermonitors.com/whitepapers/?whitepaper_topic=voltage-unbalance) - Training - [All](https://info.powermonitors.com/training) - [PDH Eligible Classes](https://powermonitors.com/product-category/classes/) - [On-Site Training](https://powermonitors.com/on-site-training/) - [Online Webinars](https://info.powermonitors.com/no-cost-class-schedule) - [Support](https://powermonitors.com/support/) - About - [About Us](https://powermonitors.com/about-pmi/) - [Contact](https://powermonitors.com/contact/) - [Join Our Team!](https://info.powermonitors.com/join-pmi) - [Receive our Newsletter](https://info.powermonitors.com/email-subscribe-page) - [PQ Resources](https://info.powermonitors.com/power-quality-resources) - [Power Quality Solutions](https://powermonitors.com/power-quality-solutions/) - [Who We Serve](https://powermonitors.com/sales-representatives/) - [Account](https://powermonitors.com/account/) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. ![PMI-Logo-Phone-Site-2023-900px](https://library.powermonitors.com/hs-fs/hubfs/PMI-Logo-Phone-Site-2023-900px.png?width=113&name=PMI-Logo-Phone-Site-2023-900px.png "PMI-Logo-Phone-Site-2023-900px") # Harmonic Calculations   |   , ## **Unlocking Power Quality Insights Through Harmonic Analysis** This white paper details the calculation of harmonics and interharmonics in electrical systems using the Discrete Fourier Transform (DFT). It explains how waveform distortions, primarily from nonlinear loads, can be decomposed into harmonic components, and outlines industry standards for measurement and analysis. The paper also covers the formation of harmonic and interharmonic groups, providing practical examples and formulas for accurate power quality assessment. **Key topics include:** - Harmonics from Nonlinear Loads - The Discrete Fourier Transform (DFT) - Industry Standards for Harmonic Measurement - Calculating Harmonic Magnitude and Phase Angle - Interharmonics and Harmonic Groups **Why utilities should care:** Accurate harmonic analysis enables identification of waveform distortion sources, supports compliance with power quality standards, and informs mitigation strategies to reduce equipment stress, improve reliability, and optimize network performance. You may also enjoy...   - - - - ## Speakers ### [Alvin Rogers](https://library.powermonitors.com/harmonic-calculations#inline-content-1speakers)[Follow me on LinkedIn](https://www.linkedin.com/apex-alvinrogers) Director of Sales Omnicorp Alvin Rogers Director of Sales Omnicorp About Alvin Rogers Alvin Rogers is a highly accomplished and sought-after speaker, renowned for their expertise and captivating stage presence. With a diverse background in \[relevant field or industry\], they bring a wealth of knowledge and experience to every speaking engagement. Their dynamic and engaging style seamlessly combines powerful storytelling with actionable insights, leaving audiences inspired and equipped with practical strategies for success. Alvin has delivered impactful keynote addresses at prestigious conferences and corporate events worldwide, consistently receiving rave reviews for their ability to connect with and energize audiences. Whether addressing topics such as \[specific areas of expertise\], leadership, or innovation, Alvin is dedicated to empowering individuals and organizations to reach their full potential. [LinkedIn](https://www.linkedin.com/apex-alvinrogers) [Facebook](https://www.facebook.com/apex-alvinrogers) [Instagram](https://www.instagram.com/apex-alvinrogers) [Twitter](https://www.twitter.com/apex-alvinrogers) ### [Lisa Smith](https://library.powermonitors.com/harmonic-calculations#inline-content-2speakers)[Follow me on LinkedIn](https://www.linkedin.com/apex-lisasmith) Creative Director Megacorp Lisa Smith Creative Director Megacorp About Lisa Smith Lisa Smith is a highly accomplished and sought-after speaker, renowned for their expertise and captivating stage presence. With a diverse background in \[relevant field or industry\], they bring a wealth of knowledge and experience to every speaking engagement. Their dynamic and engaging style seamlessly combines powerful storytelling with actionable insights, leaving audiences inspired and equipped with practical strategies for success. Lisa has delivered impactful keynote addresses at prestigious conferences and corporate events worldwide, consistently receiving rave reviews for their ability to connect with and energize audiences. Whether addressing topics such as \[specific areas of expertise\], leadership, or innovation, Lisa is dedicated to empowering individuals and organizations to reach their full potential. [LinkedIn](https://www.linkedin.com/apex-lisasmith) [Facebook](https://www.facebook.com/apex-lisasmith) [Instagram](https://www.instagram.com/apex-lisasmith) [Twitter](https://www.twitter.com/apex-lisasmith) ### [James McGiven](https://library.powermonitors.com/harmonic-calculations#inline-content-3speakers)[Follow me on LinkedIn](https://www.linkedin.com/apex-jamesmcgiven) President Minicorp James McGiven President Minicorp About James McGiven James McGiven is a highly accomplished and sought-after speaker, renowned for their expertise and captivating stage presence. With a diverse background in \[relevant field or industry\], they bring a wealth of knowledge and experience to every speaking engagement. Their dynamic and engaging style seamlessly combines powerful storytelling with actionable insights, leaving audiences inspired and equipped with practical strategies for success. James has delivered impactful keynote addresses at prestigious conferences and corporate events worldwide, consistently receiving rave reviews for their ability to connect with and energize audiences. Whether addressing topics such as \[specific areas of expertise\], leadership, or innovation, James is dedicated to empowering individuals and organizations to reach their full potential. [LinkedIn](https://www.linkedin.com/apex-jamesmcgiven) [Facebook](https://www.facebook.com/apex-jamesmcgiven) [Instagram](https://www.instagram.com/apex-jamesmcgiven) [Twitter](https://www.twitter.com/apex-jamesmcgiven) Power Monitors, Inc. is an industry-leading product design and manufacturing firm based in Mt. Crawford, Virginia. PMI strives to solve power quality problems by listening to our customers and working with them to design and manufacture products. Total customer satisfaction is the primary goal of all PMI staff. Please browse our site or call us to learn more about PMI and how we can help meet your power monitoring needs.   800 N Main St Mt Crawford, VA 22841 | Toll Free 800.296.4120 | Fax 540.432.9430 | © 2025 Power Monitors, Inc. ###### Follow Us [Follow us on Facebook](https://www.facebook.com/powermonitors/) [Follow us on LinkedIn](https://www.linkedin.com/company/power-monitors) [Follow us on Twitter](https://twitter.com/powermonitors) [Follow us on Instagram](https://info.powermonitors.com/email-subscribe-page) - [Support](https://powermonitors.com/support) - [Library](https://library.powermonitors.com) - [Training](https://info.powermonitors.com/training) - [Contact](https://powermonitors.com/contact/) - [Products](https://powermonitors.com/products/) - [- Bolt](https://powermonitors.com/product/bolt/) - [- Revolution](https://powermonitors.com/product/revolution/) - [- Seeker](https://powermonitors.com/product/seeker/) - [- Guardian](https://powermonitors.com/product/guardian/) - [Careers](https://info.powermonitors.com/join-pmi) - [Terms and Conditions](https://powermonitors.com/terms-and-conditions/)