Impedance-Based Analysis of Active Frequency Drift Islanding Detection for Grid-Tied Inverter System
IEEE Transactions on Industry Applications(2016)
摘要
Islanding detection is critical to the safety of grid-tied inverters. This paper presents an impedance-based analysis of the active frequency drift (AFD) islanding detection method. To study this method, the output impedance of a grid-tied inverter is modeled. The Zqq of the inverter impedance features a negative incremental resistor, whose magnitude is equal to the dc impedance magnitude of the l...
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关键词
Inverters,Phase locked loops,Impedance,Stability analysis,Power system stability,Islanding,Load modeling
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