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Modern Residential Devices Drive New Interharmonic Flicker Challenges
This white paper reveals that phase-angle fired residential appliances, such as space heaters and kitchen devices, generate significant interharmonic currents that existing power quality (PQ) standards fail to address. These interharmonics, particularly at 45 Hz and 75 Hz, cause severe voltage flicker affecting not just the source home but all customers on a shared transformer. The findings highlight a gap in current PQ measurement and standards, urging a reevaluation of how residential loads are monitored and managed.
Key topics include:
- Phase Angle Fired Space Heater
- Interharmonic Content
- Interharmonic Loads and Flicker
Why utilities should care:
Emerging residential appliances introduce interharmonic currents that cause widespread voltage flicker, often undetected by current PQ standards. Understanding and identifying these sources is critical to maintaining customer satisfaction and grid reliability.
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