A case study of bad data detection for distribution feeder voltage measurement. - Naotaka Okada; Masahiro Takasaki; Kazuyuki Tanaka (ISGT Europe, 2012)

Evaluation of Countermeasures Against Harmonic Disturbances Caused by Agricultural Heat Pumps. - Kyohei Kawamura; Kentaro Fukushima; Naotaka Okada; Kohei Okawa (ISGT EUROPE, 2023)

Measurement-based Harmonic Current Modeling of Agricultural Heat Pumps with Active Filters. - Kyohei Kawamura; Kentaro Fukushima; Naotaka Okada (ISGT EUROPE, 2024)

Assessment of Harmonic Stability of Grid-connected Inverter and Harmonic Limits in IEC TS 61000-3-16. - Hiro Nakayama; Naotaka Okada (ISGT EUROPE, 2024)