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Development of grid‐interconnection inverter with an islanding detection function by synchronized injection of harmonic active signal
Author(s) -
Nunomura Naoto,
Yoshida Yoshiaki,
Suzuki Hirokazu
Publication year - 2019
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.23185
Subject(s) - islanding , inverter , harmonic , interconnection , signal (programming language) , voltage , electronic engineering , grid , computer science , electrical engineering , engineering , physics , distributed generation , acoustics , telecommunications , mathematics , geometry , renewable energy , programming language
We propose the islanding detection method using harmonic current as active signal. The active signal can be injected in the suppressed direction of the harmonic voltage during grid interconnection. On the other hand, the active signal is injected in the synchronized direction of the harmonic voltage due to the loads during islanding operation. As the result, the harmonic voltage is increased and the islanding operation is detected within 0.2 seconds. We have developed the single phase inverter for grid‐interconnection of low voltage with these functions and performed the experimental verification.