{"id":10106,"date":"2025-09-24T15:13:57","date_gmt":"2025-09-24T13:13:57","guid":{"rendered":"https:\/\/www.neo-messtechnik.com\/?page_id=10106"},"modified":"2025-12-15T12:07:06","modified_gmt":"2025-12-15T11:07:06","slug":"applications-power-quality","status":"publish","type":"page","link":"https:\/\/www.neo-messtechnik.com\/en\/applications-power-quality","title":{"rendered":"Applications – PQ"},"content":{"rendered":"
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Power Quality Applications<\/h2><\/div>

All over the Power Grid<\/h2><\/div>
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Supraharmonics<\/a><\/h5>

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Smart Meter PLC<\/a><\/h5>

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150 kHz Medium Voltage<\/a><\/h5>

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Electric Vehicle Charging Station<\/a><\/h5>

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Grid Impedance<\/a><\/h5>

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More Applications<\/a><\/h5>

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Supraharmonics<\/h2><\/div>

Beyond the 50th Harmonic. Complete Spectrum Analysis.<\/h2><\/div>
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Supraharmonic Analysis Fundamentals<\/h2><\/div>
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Power quality analysis stopping at the 50th harmonic misses the frequency range where 80% of future electrical loads will operate. Modern power electronics generate emissions from 2 kHz to 500 kHz that cause equipment malfunctions, communication failures, and EMC violations.<\/p>\n

Engineering teams need measurement tools that address the full spectrum of power quality issues in modern electrical systems. Traditional analyzers cannot capture supraharmonic phenomena like frequency beating, intermodulation effects, or sub-cycle impedance variations that affect system performance.<\/p>\n\n\t\t<\/div> \n\t<\/div> <\/div><\/div><\/div>

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This comprehensive application note covers supraharmonic measurement techniques for modern power systems. Real examples include EV charging interruptions, smart meter failures, coffee machine malfunctions, and LED driver disturbances – all traced to supraharmonic emissions.<\/p>\n

Discover measurement methodologies for wideband vs. narrowband emissions, frequency intermodulation analysis, and envelope triggering for transient capture. The note explains why simulation approaches fail and demonstrates field measurement techniques that reveal hidden power quality issues.<\/p>\n\n\t\t<\/div> \n\t<\/div> <\/div><\/div><\/div>

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V2G Charging Impact on Grid Impedance up to 150 kHz<\/h2><\/div>
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Electric vehicle charging stations with bidirectional power flow create unexpected grid impedance changes that extend far beyond traditional harmonic analysis. V2G systems use high-frequency switching for efficient conversion, but their LCL input filters and DC link capacitors introduce resonance behaviors across the 2-150 kHz supraharmonic spectrum.<\/p>\n

Even disconnected V2G chargers alter grid impedance through passive components. LCL filter capacitors affect resonance between 10-50 kHz, while DC link capacitors influence lower frequencies, transforming stations into supraharmonic sinks even when not operating.<\/p>\n<\/div>\n\n\t\t<\/div> \n\t<\/div> <\/div><\/div><\/div>

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This research documents Matlab Simulink analysis combined with laboratory measurements on reconstructed distribution networks. University studies reveal how V2G connections create parallel and series resonance points affecting equipment heating and PLC communication systems.<\/p>\n

See measurement methodology using 1 MS\/s sampling across multiple channels. The study includes impedance analysis showing resonance patterns, sensitivity analysis of passive components, and why conventional grid modeling fails to predict V2G interaction effects.<\/p>\n<\/div>\n\n\t\t<\/div> \n\t<\/div> <\/div><\/div><\/div>

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The effects of active power electronics on the higher frequency grid impedance up to 150 kHz<\/a><\/h4>