Publications

Articles

Peer-reviewed paper

  • N. Kodama, Y. Yokomizu, W. Takenaka, M. Iwata, M.S.S. Danish: “DC Arc Quenching Using Ablation of Polymer Narrow-Section Arranged around Fuse Element”, IEEJ Transactions on Electrical and Electric Engineering, Vol. 18, pp. 1837-1844 (Nov. 2023)
  • W. Takenaka, N. Kodama, Y. Yokomizu, K. Hasegawa, K. Nakamura, M. Iwata: “Additive effect of silicone resin on direct current arc quenching performance of a model electric fuse: electrical resistivity and thermal diffusivity of high-temperature Cu/SiO2 vapor mixed with C2H6SiO vapor decomposition”, Japanese Journal of Applied Physics, Vol. 63, No. 9, 096001 (Sep. 2024)

Conference presentation

  • T. Kasai, N. Kodama, Y. Yokomizu, T. Sugita, M.S.S. Danish, M. Iwata: “Interaction Potentials between Chemical Species Formed during Arc Interruption Process using Alternative Quenching Gas -Toward High Accurate Derivation of Transport Properties using Quantum Chemical Calculation-“, Joint Technical Meeting on “Electrical Discharges, Plasma and Pulsed Power”, “Static Apparatus” and “Switching and Protecting Engineering”, IEE Japan, EPP-22-089/SA-22-056/SP-22-024, pp.61-66, Nagoya, Japan (Jul.2022)
  • M.S.S. Danish, M. Iwata, Y. Yokomizu, Naoto Kodama: “Fundamental Analysis of Fault Current in the Case of Short-Circuit on the DC Side of a Hybrid AC/DC System”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, A4-6, Online, Japan (Aug.2022)
  • Y. Shigemura, Y. Yokomizu, M. Iwata, N. Kodama, M.S.S. Danish: “Variation of Resistance Components of a Cylindrical Conductor of AC and DC Energization —Towards Development of Verification Method for Short-Circuit Performance of Electric Power DC Equipment—”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, D4-5, Online, Japan (Aug.2022)
  • M. Iwata: “Towards the Construction of Next-Generation Electric Power Networks”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, I5-1, Online, Japan (Aug.2022)
  • Kasai, N. Kodama, Y. Yokomizu, T. Sugita, M.S.S. Danish, M. Iwata: “Interaction Potentials between Identical Chemical Species For CF or CF2 -Toward High Accurate Derivation of Transport Properties using Quantum Chemical Calculation-“, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, I5-7, Online, Japan (Aug.2022)
  • N. Kodama, Y. Yokomizu, W. Takenaka, K. Nakamura, M. Iwata, M.S.S. Danish: “Experiment on DC Arc Quenching using Ablation of Polymer Material Installed Around Fuse Element”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, D6-1, Online, Japan (Aug.2022)
  • N. Kodama, Y. Yokomizu, W. Takenaka, K. Nakamura, S. Tozaki, M. Iwata, M. S. S. Danish: “Experiment on DC Arc Quenching using Ablation of Polymer Narrow-Section Arranged around Fuse Element”, 13th International Workshop on High Voltage Engineering (IWHV 2022), EPP-22-125/SP-22-060/HV-22-106, pp. 71-76, Naha, Japan (Nov. 2022)
  • M. S. S. Danish, M. Iwata, Y. Yokomizu, N. Kodama: “Simplified analysis of short-circuit current for hybrid AC/DC delivery system”, 13th International Workshop on High Voltage Engineering (IWHV 2022), EPP-22-127/SP-22-062/HV-22-108, pp. 83-86, Naha, Japan (Nov. 2022)
  • M. Iwata: “Utilization of the Video Content of IEEJ Power and Energy Society for Engineer Education”, 2023 Annual Meeting of the Institute of Electrical Engineers of Japan, No. H4-6, Nagoya University, Japan (Mar. 2023)
  • T. Kasai, N. Kodama, Y. Yokomizu, T. Sugita, M. Iwata, M.S.S. Danish: “Derivation of Scattering Angles in Interatomic Collisions between Oxygen Atoms Using Quantum Chemical Calculation-Toward High Accurate Derivation of Transport Properties -“, 2023 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-047, Nagoya University, Japan (Mar. 2023)
  • N. Kodama, Y. Yokomizu, W. Takenaka, M. Iwata, M. S. S. Danish: “Utilization of boron-nitride and silica-sand mixture powder for large current arc quenching process -Boron nitride 30wt% admixing-“, 2023 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-049, Nagoya University, Japan (Mar. 2023)
  • W. Takenaka, N. Kodama, Y. Yokomizu, M. Iwata, M. S. S. Danish: “Estimation of quenching medium vapor concentration in arc during DC interruption process using silica-sand and silicone polymer”, 2023 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-050, Nagoya University, Japan (Mar. 2023)
  • K. Nakamura, N. Kodama, W. Takenaka, Y. Yokomizu, M. Iwata, M. S. S. Danish: ” Withstand voltage characteristics of Cu/SiO2 vapor mixture -Chemical composition and ionization cross section-“, 2023 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-051, Nagoya University, Japan (Mar. 2023)
  • Y. Shigemura, Y. Yokomizu, M. Iwata, N. Kodama, M.S.S. Danish: “Analysis of Temperature Rise during AC and DC Current Flow in a Horizontally Installed Cylindrical Conductor -Towards Development of Verification Method for Short-Circuit Performance of Electric Power DC Equipment-“, 2023 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-056, Nagoya University, Japan (Mar. 2023)
  • N. Nishiyama, M. Iwata, Y. Yokomizu, N. Kodama, M.S.S. Danish: “Trial of Current Waveform Analysis for DC Series Arcs Using Wavelet Transformation -Towards Development of Detecting Technology for Fault Arcs in DC Facilities-“, 2023 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 7-036, Nagoya University, Japan (Mar. 2023)
  • N. Nishiyama, M. Iwata, Y. Yokomizu, N. Kodama: “Trial Application of Wavelet Transformation to Low Voltage DC Series Arc Detection Method”, Joint Technical Meeting on “Electrical Discharges, Plasma and Pulsed Power”, “Static Apparatus” and “Switching and Protecting Engineering”, IEE Japan, EPP-23-049/SA-23-033/SP-23-001, pp. 1-5, Kanazawa, Japan (Jul. 2023)
  • K. Hasegawa, Y. Yokomizu, M. Iwata, N. Kodama: ” Direct Current limitation and interruption by means of generation of damping oscillation current–Low Voltage DC interruption with SiC-MOSFETs and its fundamental investigation”, Joint Technical Meeting on “Electrical Discharges, Plasma and Pulsed Power”, “Static Apparatus” and “Switching and Protecting Engineering”, IEE Japan, EPP-23-050/SA-23-034/SP-23-002, pp. 7-11, Kanazawa, Japan (Jul. 2023)
  • N. Nishiyama, M. Iwata, Y. Yokomizu, N. Kodama: “Wavelet Transformation Analysis of Low Voltage DC Series Arcs under Different Current Conditions -Towards Development of Detecting Technology for Fault Arcs in DC Facilities-“, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B1-1, Toyohashi, Japan (Aug.2023)
  • S. Shimizu, Y. Yokomizu, N. Kodama, S. Uchiyama, M. Iwata, T. Sakai, M. Tsukahara, A. Miyamoto: “Fundamental study on arc column voltage rise during DC limitation and interruption –rise emergence domain of arc column resistance and its forwardness due to polymer plate arrangement–”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B1-3, Toyohashi, Japan (Aug.2023)
  • Y. Shigemura, Y. Yokomizu, M. Iwata, N. Kodama: “Analysis of Current Density Distribution in a Copper Cylinder Conductor with Time Variation of Current —Towards Development of Verification Method for Short-Circuit Performance of Electric Power DC Equipment-“, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B1-4, Toyohashi, Japan (Aug.2023)
  • K. Hasegawa, Y. Yokomizu, M. Iwata, N. Kodama: “Direct current limitation and interruption with model low-voltage circuit breaker constructed of SiC-MOSFET –Source voltage of 100-400 V–”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B1-6, Toyohashi, Japan (Aug.2023)
  • K. Nakamura, N. Kodama, W. Takenaka, Y. Yokomizu, M. Iwata: “Reduced collision ionization coefficient and reduced electron attachment coefficient for high-temperature Cu/SiO2 vapor mixture remaining inside current limiting fuse”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B1-7, Toyohashi, Japan (Aug.2023)
  • M. Iwata: “Future Electric Power System in a Carbon-Neutral Society”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, I5-1, Toyohashi, Japan (Aug.2023)
  • N. Kodama, K. Nakamura, Y. Yokomizu, W. Takenaka, M. Iwata: “Critical Reduced Electric Field Strength for High-Temperature Cu/SiO2 Vapor Mixture Formed Inside Current Limiting Fuse”, The 2023 Annual Conference of Power and Energy Society IEE of Japan, No. 258，pp. 9_6_7 – 9_6_8, Toyota, Japan (Sep.2023)
  • Y. Shigemura, Y. Yokomizu, M. Iwata, N. Kodama: “Analysis of Surface Temperature Rise of an Aluminum Cylindrical Conductor —Toward the Development of a Method for Verifying the Short-Circuit Performance of Power DC Equipment- “, The 2023 Annual Conference of Power and Energy Society IEE of Japan, No. 262，pp. 9_6_15 – 9_6_16, Toyota, Japan (Sep.2023)
  • W. Takenaka, N. Kodama, Y. Yokomizu, M. Iwata, M. S. S. Danish: “Estimation of Quenching Medium Vapor Concentration in Arc during DC Interruption using Silicone Polymer and Silica-sand”, 23rd International Conference on Gas Discharges and their Applications (GD2023), pp. 192-195, Greifswald, Germany (Sep.2023)
  • N. Kodama, Y. Yokomizu, W. Takenaka, M. Iwata, M. S. S. Danish: “High DC Arc Quenching Process using Si3N4 or BN Powder Mixed with Flattery Silica-Sand – Si3N4 or BN 30 wt.% Admixing”, 23rd International Conference on Gas Discharges and their Applications (GD2023), pp. 204-207, Greifswald, Germany (Sep.2023)
  • N. Kodama, K. Nakamura, Y. Yokomizu, W. Takenaka, M. Iwata: “Predominant factor determining critical electric field strength for high-temperature Cu/SiO2 vapor mixture formed in fuse”, Joint Technical Meeting on “Electrical Discharges, Plasma and Pulsed Power”, “Switching and Protecting Engineering” and “High Voltage Engineering”, IEE Japan, EPP-23-087/SP-23-029/HV-23-058, Himeji, Japan (Nov. 2023)
  • W. Takenaka, N. Kodama, Y. Yokomizu, M. Iwata: “Estimation of quenching medium vapor concentration in arc during DC interruption process using silica-sand and silicone polymer: variation for different polymer application amount”, Joint Technical Meeting on “Electrical Discharges, Plasma and Pulsed Power”, “Switching and Protecting Engineering” and “High Voltage Engineering”, IEE Japan, EPP-23-093/SP-23-035/HV-23-064, Himeji, Japan (Nov. 2023)
  • K. Hasegawa, Y. Yokomizu, M. Iwata, N. Kodama: “Direct Current limitation and interruption with model low-voltage circuit breaker constructed of SiC-MOSFET: Measurement for source voltage of 100 to 400 V”, Joint Technical Meeting on “Electrical Discharges, Plasma and Pulsed Power”, “Switching and Protecting Engineering” and “High Voltage Engineering”, IEE Japan, EPP-23-095/SP-23-037/HV-23-066, Himeji, Japan (Nov. 2023)
  • W. Takenaka, N. Kodama, Y. Yokomizu, M. Iwata: “Estimation of Silicone Vapor Concentration in Arc Generated during DC Interruption using Silica-Sand with Silicone Polymer”, International Conference on Materials and Systems for Sustainability 2023 (ICMaSS2023) (Dec. 2023)
  • K. Nakamura, N. Kodama, W. Takenaka, Y. Yokomizu, M. Iwata: “Estimation of transient arc resistivity for high temperature Cu/SiO2 vapor mixture generated inside modeled DC fuse”, 2024 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-028, Tokushima, Japan (Mar. 2024)
  • W. Takenaka, N. Kodama, Y. Yokomizu, M. Iwata: “Decreasing Arc Diameter by Mixing Silicone-Resin Decomposition into Copper Vapor: Resin Coating Mass of Five Milligrams”, 2024 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-030, Tokushima, Japan (Mar. 2024)
  • N. Kodama, Y. Yokomizu, T. Igarashi, M. Iwata: “Reduced ionization coefficient for high-temperature air mixed with large amount of Cu vapor – Pressure: 0.1 MPa, Temperature: 3000K -”, 2024 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-031, Tokushima, Japan (Mar. 2024)
  • K. Hasegawa, Y. Yokomizu, M. Iwata, N. Kodama: “A study on heat generation and temperature rise at junction in low-voltage DC interrupting process with SiC-MOSFET”, 2024 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-034, Tokushima, Japan (Mar. 2024)
  • Y. Shigemura, Y. Yokomizu, M. Iwata, N. Kodama: “Derivation of Electrical Resistance of Pipe Conductor by Analysis of AC Current Density Phasor —Towards Development of Alternative Testing with AC for Power DC Equipment-”, 2024 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-037, Tokushima, Japan (Mar. 2024)
  • N. Nishiyama, M. Iwata, Y. Yokomizu, N. Kodama, T. Sakai, M. Tsukahara, A. Miyamoto: “Wavelet Analysis for detecting low-voltage DC short-gap under different voltage conditions”, 2024 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-038, Tokushima, Japan (Mar. 2024)
  • S. Shimizu, Y. Yokomizu, N. Kodama, M. Iwata, S. Uchiyama, T. Sakai, M. Tsukahara, A. Miyamoto: “Increase emergence domain of arc resistance during low voltage DC interruption and its forwardness due to polymer plate arrangement”, 2024 Annual Meeting of the Institute of Electrical Engineers of Japan, No. 6-040, Tokushima, Japan (Mar. 2024)
  • S. Shimizu, Y. Yokomizu, N. Kodama, M. Iwata, A. Nakamura, T. Sakai, M. Tsukahara, A. Miyamoto: “Emergence of effects due to polymer plate arrangement and increase domain of arc resistance during DC interruption”, Joint Technical Meeting on “Electrical Discharges, Plasma and Pulsed Power”, “Static Apparatus” and “Switching and Protecting Engineering”, IEE Japan, EPP-24-067/SA-24-035/SP-24-008, Hitachi, Japan (Aug. 2024)
  • Y. Matsuoka, A. Nakamura, M. Iwata, Y. Yokomizu, N. Kodama: “Fundamental study of frequency control considering converter capacity for multi-terminal HVDC system”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, A3-3, Gifu, Japan (Aug. 2024)
  • D. Nishizawa, H. Kojima, A. Nakamura, M. Iwata, N. Hayakawa: “Critical Current Coordination of Superconducting Fault Current Limiters in Multi-terminal HVDC system”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, A3-4, Gifu, Japan (Aug. 2024)
  • Y. Go, Y. Yokomizu, M. Iwata, N. Kodama, A. Nakamura: “Derivation of Electrical Resistance in Aluminum Hollow Cylindrical Conductor Considering Skin Effect”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B6-1, Gifu, Japan (Aug. 2024)
  • S. Shimizu, Y. Yokomizu, N. Kodama, M. Iwata, A. Nakamura, T. Sakai, M. Tsukahara, A. Miyamoto: “Fundamental analysis of arc-resistance rise for different polymer arrangements during low voltage DC interruption”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B6-2, Gifu, Japan (Aug. 2024)
  • A. Sakai, Y. Yokomizu, N. Kodama, M. Iwata, A. Nakamura: “Fundamental research on low-voltage DC interrupting method by high-speed current commutation using switching function of SiC-MOSFET –capacitance 1–100 μF–”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B6-3, Gifu, Japan (Aug. 2024)
  • T. Igarashi, Y. Yokomizu, N. Kodama, M. Iwata, A. Nakamura: “Critical reduced electric field strength for N2/O2 mixed with high-concentration of Cu vapor at atmospheric pressure: Temperature of 3000 K”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B6-4, Gifu, Japan (Aug. 2024)
  • M. Iwata: “Toward the Construction of Next-Generation Electricity and Energy Networks”, Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, B6-4, Gifu, Japan (Aug. 2024)
  • A. Nakamura, M. Iwata, Y. Yokomizu, N. Kodama: “Fundamental Study on Terminal Coordinated Control Method for MTDC System – Proposal of DC-AVR Terminal Detection Method by DC Voltage Control -”, The 2024 Annual Conference of Power and Energy Society IEE of Japan, No. 125，pp. 2_1_19 – 2_1_20, Osaka, Japan (Sep. 2024)
  • K. Nakamura, N. Kodama, W. Takenaka, Y. Yokomizu, M. Iwata, A. Nakamura: “Simultaneous Estimation of Arc Diameter, Electrical Resistivity and Transient Temperature for High-Temperature Cu/SiO2 Vapor Mixture Generated inside Modeled DC Fuse: 500 A Current”, The 2024 Annual Conference of Power and Energy Society IEE of Japan, No. 237，pp. 8_1_1 – 8_1_2, Osaka, Japan (Sep. 2024)
  • N. Nishiyama, M. Iwata, Y. Yokomizu, N. Kodama, A. Nakamura, T. Sakai, M. Tsukahara, A. Miyamoto: “Fundamental Study on Low Voltage DC Series Arc Detection Method – Wavelet Analysis of Currents Supposing Faults in DC Facilities -”, The 2024 Annual Conference of Power and Energy Society IEE of Japan, No. 238，pp. 8_1_3 – 8_1_4, Osaka, Japan (Sep. 2024)
  • D. Nishizawa, H. Kojima, A. Nakamura, M. Iwata, N. Hayakawa: “Fault Current Limiting Coordination of Superconducting Fault Current Limiters in Multi-terminal HVDC system”, Joint Technical Meeting on “Power Engineering” and “Power Systems Engineering “, IEE Japan, PE-24-170/PSE-24-170, Sendai, Japan (Sep. 2024)
  • A. Nakamura, M. Iwata, Y. Yokomizu, N. Kodama: “Fundamental Study on Control Method Considering Power Sharing Between Positive Pole and Negative Pole of Bipolar MTDC System”, Joint Technical Meeting on “Power Engineering” and “Power Systems Engineering “, IEE Japan, PE-24-171/PSE-24-171, Sendai, Japan (Sep. 2024)

Invited Presentation

  • M. Iwata: “HVDC Transmission Technologies and SDGs”, IEEJ Fundamental and Materials Society and Tokai-Section Joint Conference, Nagoya, Japan (Oct. 2024)

Award

  • M. Iwata: IEEJ FELLOW, “Development of lightning and fault arc protection technology for power transmission and distribution facilities” (Mar.2023)
  • M. Iwata: IEEJ Annual Meeting Contribution Award, “Contribution to The 2023 Annual Meeting of the IEEJ as Secretary of Executive Organizing Committee” (Mar.2023)
  • M. Iwata, T. Ohtaka, Y. Goda, S. Yamagami, A. Kato, K. Nagano: IEEJ 79th Distinguished Paper Award, “Melting and Breaking Characteristics of Strands of High-strength and High-corrosion-resistant OPGW due to DC Arc Discharge Simulating High-energy Lightning Strike” (May 2023)
  • M. Iwata, T. Ohtaka, Y. Goda: IEEJ 80th Technical Development Award, “Development and Practical Application of Evaluation Technology for Arc-Resistant Characteristics of Power Transmission and Distribution Lines during Lightning Strikes and Short-Circuit Faults ” (May 2024)