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Differential protection method for distribution networks based on harmonic characteristics of photovoltaic power sources
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DOI：10.1016/j.egyr.2026.109530.png)
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Abstract
En 中文
• A novel differential protection scheme using PV harmonic characteristics is proposed for distribution networks. • Analytical expressions for 2nd/3rd harmonic currents from PV during faults are derived based on inverter control. • A dual-startup criterion combining voltage sag and harmonic content ensures reliable operation under high impedance. • Fault identification uses vector sum/difference of harmonic currents to distinguish internal/external faults accurately. • Simulations confirm strong immunity to transition resistance and high reliability compared to conventional methods.
Keywords:
Distribution network
Differential protection
Photovoltaic power source
Harmonic characteristics
Transition resistance
Journal
E
IF:
5.1
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658
Citations:
0
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