論文 - 迫田 達也
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水トリー劣化したCV ケーブルの部分放電特性に関する研究 査読あり
山崎 悠平, 山下 勝也, 迫田 達也
宮崎大学工学部紀要 49 101 - 104 2020年9月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：宮崎大学工学部
Since the aging of electric facilities have become an important issue in Japan, safety of such facilities in operation and ensuring high reliability are highly demanded. It is also necessary for each electric power company to reduce the cost for maintaining, managing, operating, and updating facilities because of the electric power liberalization. For these backgrounds, some sorts of sophisticated technologies for on-line monitoring systems and deterioration diagnosis technologies are needed rapidly in order to avoid any electric failures. Our esearch is to develop partial discharge locator (PDL) which is to locate cable faults by detecting current pulses generated by partial discharges (PDs). This paper presented theoretical analysis of frequency characteristics of a PD pulse on a branch line for PDL adaptability of multiple branch lines by using a simulation software. In addition, as a comparison to the simulation, we also carried out experiments using actual XLPE cables and confirmed the integrity verification of the simulation results. In this paper, we investigated PD characteristics caused by water trees in XLPE cables. It was found out that PDs can be generated by water trees. Therefore, PDL can be used for locating water tree.
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小田 浩史, 迫田 達也, 相島 武, 西村 豪志
宮崎大学工学部紀要 49 105 - 109 2020年9月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：宮崎大学工学部
In recent years, insulation deterioration due to partial discharges (PDs) of power equipment molded with epoxy resin is concerned. In a solid insulation device molded with an insulator such as an epoxy resin, bubbles may remain in the resin during the manufacturing process, so that void defects sometimes occur. It is important to clarify the behavior of PD inside the defect from the occurrence to the failure from a viewing point of designing a safe and long-life solid insulation molded device. In this study, the PD occurrence probability and the PD ignition time were investigated. Also, the life characteristics of epoxy resin owing to PDs until a breakdown occurs was evaluated.
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Study on Location Accuracy of Partial Discharge Locator for Electric Power Cable
Katsuya YAMASHITA, Tatsuya SAKODA
Memoirs of Faculty of Engineering University of Miyazaki 91 - 94 2020年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Study on Propagation Characteristics of High Frequency Pulse Current in Electric Power Cable
Katsuya YAMASHITA, Tatsuya SAKODA
Memoirs of Faculty of Engineering University of Miyazaki 95 - 100 2020年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Partial Discharge Characteristics of XLPE Cable with Water Tree
Yuhei YAMASAKI, Katsuya YAMASHITA, Tatsuya SAKODA
Memoirs of Faculty of Engineering University of Miyazaki 101 - 104 2020年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Characteristics of Partial Discharge in Epoxy Resin with a Void
Hiroshi ODA, Tatsuya SAKODA, Takeru AISHIMA, Takeshi NISHIMURA
Memoirs of Faculty of Engineering University of Miyazaki 105 - 110 2020年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Affecting Factors to V-t Characteristics of Impulse Discharge
Hiroshi ODA, Issei HAZAMA, Tatsuya SAKODA, Katsutaka KUBO, Manabu MIZUTANI, Yasunori KASUGA, Takato FUKANO
Memoirs of Faculty of Engineering University of Miyazaki 111 - 114 2020年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Sterilization of Stem-end Rot of Mango using Dielectric Barrier Discharge Source and Influence of Operating Gas on sterilization
Shunsuke KINOSHITA, Yoichiro TADA, Tatsuya SAKODA, Kazutoshi TAZAWA, Hiroyuki ICHIKAWA
Memoirs of Faculty of Engineering University of Miyazaki 115 - 118 2020年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Multivariate Analysis Using R for Various Climatic Effects on the Output Performances of CIGS and Multi-Crystalline Si Photovoltaic Systems Installed in Miyazaki, Japan
Kyaw Myo WIN, Yasuyuki OTA, Kensuke NISHIOKA, Tatsuya SAKODA, Noriyuki HAYASHI
Memoirs of Faculty of Engineering University of Miyazaki 119 - 128 2020年7月
記述言語：英語 掲載種別：研究論文（大学，研究機関等紀要）
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Study on degradation diagnostic method for silicone rubber 査読あり
Tatsuya Sakoda, Eisuke Minami, Takuma Miyake, Noriyuki Hayashi, Shigehiko Goto, Yoshiaki Aka, Tomikazu Anjiki, Yasunori Kasuga, Takato Fukano
Journal of Electrostatics 107 103479-1 - 103479-6 2020年6月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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ケーブルにおける 部分放電の位置標定技術 査読あり
山下勝也，三宅琢磨，迫田達也，川野渉, 宮川浩二
電気設備学会論文誌 40 ( 4 ) 14 - 19 2020年4月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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架橋ポリエチレンケーブルの防蟻層の遮水効果 査読あり
黒岩 拓真, 迫田 達也, 有元 慎太郎, 生田 昌輝
電気設備学会論文誌 40 ( 3 ) 12 - 13 2020年3月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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分岐線路における部分放電電流パルスの伝搬特性 査読あり
山下勝也, 三宅琢磨, 迫田 達也, 川野渉
電気学会論文誌A 140 ( 2 ) 92 - 97 2020年2月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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架橋ポリエチレンケーブルの防蟻層の遮水効果
黒岩 拓真, 迫田 達也, 有元 慎太郎, 生田 昌輝
電気設備学会 論文誌 40 ( 3 ) 12 - 13 2020年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：一般社団法人 電気設備学会
Water-tree degradation of underground cross-linked polyethylene (XLPE) cables has been concerned. However, it seems that there is no reports of water-trees for XLPE cables with the termite preventive layer. We focus on investigation of a water shielding effect due to the termite preventive layer of the XLPE cable. The results showed that the water absorption rate of the insulting vinyl sheath was 3.18 times higher than that of a termite preventive layer at 70℃. Thus, the high - water shielding effect of XLPE cable with the termite preventive layer was confirmed.
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Propagation characteristics of partial discharge current pulse for branched line
Yamashita K., Miyake T., Sakoda T., Kawano W.
IEEJ Transactions on Fundamentals and Materials 140 ( 2 ) 92 - 97 2020年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEEJ Transactions on Fundamentals and Materials
At joint and terminal sections of electric power cables, there is possibility to occur partial discharges (PDs) in defects of insulating materials. Therefore, PD measurement is useful from a viewpoint of assessing insulation deterioration of electric power cables. There are some measurement systems to locate PDs, however, it is quite difficult and complicated in the case where cable lines include branched lines because the PD current pulse separately flows at the branch line. To establish a PD location system, the investigation of propagation characteristics of PD current pulse for branched lines is necessary. Based on EMTP simulations and experiments, we evaluated how a PD current pulse propagates at a Y-branch. The results showed that the separation of a PD current pulse is dependent on frequency component of the PD current pulse and the cable impedance after branching. The frequency components of a PD current pulse, which are higher than the resonant frequency of lines, tend to flow into the longer cable side.
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GPSを活用したXLPEケーブルにおける部分放電の位置標定技術
山下 勝也, 三宅 琢磨, 迫田 達也, 川野 渉, 宮川 浩二
電気設備学会 論文誌 40 ( 4 ) 14 - 19 2020年
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：一般社団法人 電気設備学会
For transmission and distribution lines, cross-linked polyethylene (XLPE) cable plays an important role in distributing the stable power to customers. Electric failure for the XLPE cable decreases year by year because of progress of manufacturing. However, at joint and terminal sections of the XLPE cable, partial discharges (PDs) occur in defects of insulating materials. The PD is a precursor to dielectric breakdown. Once PD occurs, it continuously erodes insulation material. The demand of reliable power systems is quite crucial for all of power companies, and then it is demanded to develop an on-line PD measurement technique and a monitoring system.
In this study, we propose a PD locating system for XLPE cables in operation, in which the propagation velocity of PD current is not required for locating a PD. We first show how the locating system works on a XLPE cable network with time synchronization between two points. Additionally, the locating accuracy of the system is investigated. -
マンゴー軸腐病の防除手法の検討
多田陽一朗,木之下俊輔,迫田達也,田澤和俊,市川博章
放電・プラズマ・パルスパワー研究会・放電・プラズマ・パルスパワー 2019年10月
記述言語：日本語 掲載種別：研究論文（研究会，シンポジウム資料等）
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部分放電電流の分岐伝搬特性に関する基礎的検討
山下勝也, 山﨑悠平, 三宅琢磨, 迫田達也, 川野渉
放電・プラズマ・パルスパワー研究会・放電・プラズマ・パルスパワー 2019年10月
記述言語：日本語 掲載種別：研究論文（研究会，シンポジウム資料等）
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Electrical characteristics of artificially polluted silicone rubber 査読あり
TAKEZAKI Kento, MIYAKE Takuma, SAKODA Tatsuya, GOTO Shigehiko, AKA Yoshiaki, and ANJIKI Tomikazu
The International Council on Electrical Engineering (ICEE) Conference 2019年7月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Propagation Characteristics of Partial Discharge Pulse Current on Branched Line
Katsuya YAMASHITA, Takuma MIYAKE, Tatsuya SAKODA, Wataru KAWANO
MEMOIRS OF FACULTY OF ENGINEERING UNIVERSITY OF MIYAZAKI 99 - 102 2019年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）