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Portable Spreadsheet-Based Interharmonic Analysis for Power Quality Data
This white paper introduces a spreadsheet tool that enables the calculation of interharmonics from raw waveform data without the need for specialized software or macros. By leveraging only cell formulas, the tool performs a 3072-point FFT, facilitating detailed interharmonic analysis in compliance with IEC 61000-4-7. The approach allows users to analyze data from various PMI recorders, bypassing the limitations of built-in FFT functions and enhancing data portability and accessibility.
Key topics include:
- Introduction to Interharmonic Analysis
- IEC 61000-4-7 and Data Capture Requirements
- Spreadsheet FFT Implementation
- Working with Raw Waveform Data
- Step-by-Step Usage Instructions
- Case Study: Lab Test and Results
Why utilities should care:
Enables efficient, standards-compliant interharmonic analysis using widely available spreadsheet software, eliminating the need for proprietary tools or IT-intensive macros. This maximizes accessibility, reduces operational costs, and supports comprehensive power quality diagnostics.
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