Nitrogen-doped carbon materials exhibit a catalytic activity, such as an oxygen reduction reaction (ORR). In this study, we performed nitrogen doping on a carbon nanoballoon (CNB) which is a nanometer-sized carbon partic ... more
One of the weak points of all solid insulation system is the breakdown strength along the interface between two solid dielectrics. The low breakdown voltage is considered to be due to the small cavities formed in the int ... more
Our previous study showed that transient earth voltage sensor detects high frequency components mainly caused by electromagnetic waves propagating through space, as well as low frequency components caused by partial disc ... more
This paper deals with partial discharge inception voltage (PDIV) of enameled wire undergoing mechanical stress with micro cellular coating wire under ac voltage application. A model coil sample with smaller winding diame ... more
The authors have developed a micro cellular film with lower permittivity than the conventional film and investigated the decrease effect of partial discharge inception voltage (PDIV) of the cellular film wire under AC vo ... more
This paper describes an integral equation to calculate the stochastic fluctuation of partial discharge (PD) occurrence under sinusoidal voltage stress based on a simple PD model. For the simplicity of calculation we used ... more
This paper presents a topology optimization method using a greedy algorithm for submodular maximization. This method is based on a shape representation using the normalized Gaussian network. The weight coefficients of Ga ... more
A cancer treatment by ultra-short pulse high electric field is one of new biological applications. This work focuses on the design of a compact high power nanosecond pulsed electromagnetic wave generator for the cancer t ... more
On the Defection in Lightning Impulse Voltage Parameter Evaluation Procedure by IEC 60060-1: 2010
論文No: ページ数: 6 日付: 2019/03/01
著者: Shuji Sato (Graduate School of Science Engineering, Hosei University), Seisuke Nishimura (Engineering Science, Yokohama National University), Hiroyuki Shimizu (Fundamental Engineering, Nippon Institute of Technology), Hisatoshi Ikeda (School of Engineerin
キーワード : impulse generator，residual inductance，the sum of two exponential functions，test voltage function，IEC 60060-1
The new lightning impulse voltage waveform parameters evaluation procedure has been in effect since the introduction of IEC 60060-1: 2010. The new procedure employs the base curve and the test voltage function to yield t ... more
Frequency Control of Power System with Renewable Power Sources by HVDC Interconnection Line Considering Energy Balancing
論文No: ページ数: 7 日付: 2019/03/01
著者: 多田 稀美子（北見工業大学工学部電気電子工学科），梅村 敦史（北見工業大学工学部電気電子工学科），高橋 理音（北見工業大学工学部電気電子工学科），田村 淳二（北見工業大学工学部電気電子工学科），松村 喜治（北海道電力（株）），山口 大輔（北海道電力（株）），工藤 寛興（北海道電力（株）），新山 政和（北海道電力（株）），瀧 康人（北海道電力（株））
キーワード : 直流連系線，電力系統周波数制御，同時同量，再生可能エネルギー high voltage direct current (HVDC)，power system frequency control，energy balancing，renewable power
This paper proposes a method for controlling power flow of High Voltage Direct Current (HVDC) interconnection line in order to suppress the frequency fluctuations of power system with renewable power sources. In this pro ... more
Since high penetration of photovoltaic (PV) power generation has realized, vector-LDC tap control on distribution transformer and constant leading power factor operation of PV are becoming recognized as hopeful mitigatio ... more
This paper proposes a novel method for controlling photovoltaic (PV) power outputs for an optimal operation of distribution system. The proposed method maximizes the total power of PVs in a distribution system by control ... more
Accuracy of the “Two-Load Method” Considering Induction Motor Load in Power System Network Aggregation
論文No: ページ数: 12 日付: 2019/03/01
著者: 駒見 慎太郎（北陸電力（株）技術開発研究所），坂田 知昭（北陸電力（株）技術開発研究所），山田 誠司（北陸電力（株）技術開発研究所）
キーワード : 電力系統縮約，誘導機負荷，負荷ブランチ，二素子法，二負荷法，三素子法 power system aggregation，induction motor load，load branch，two-element method，two-load method，three-element method
The authors once proposed a practical power system aggregation method for network, generators, and their control systems. Since the main object then was to explain all of the new method, some issues were left unsolved in ... more
This paper proposes a monitoring and control method for transient stability (TS). First, it is clarified that there may exist various critical patterns of uncertain power flows causing instability due to photovoltaic gen ... more
Statistical Analysis of Facility Trouble of Traction Power Supply System Caused by Winter Lightning and Others
論文No: ページ数: 6 日付: 2019/03/01
著者: Hitoshi Hayashiya (Tokyo Branch Office, East Japan Railway Company), Takehiko Nakamura (Tokyo Branch Office, East Japan Railway Company), Satoru Amari (Tokyo Branch Office, East Japan Railway Company), Shiro Sekijima (Tokyo Branch Office, East Japan Railw
キーワード : traction power supply system，high speed railway，elevated bridge，winter lightning
On March the 14th in 2015, a new section of the Hokuriku High Speed Railway Line (Shinkansen) started operation between Nagano and Kanazawa. It was the first operation line of high speed railway in the winter lightning r ... more
With the increase of wind power penetration in power system, the uncertainty caused by wind farm forecast error is enlarged which results in deterioration of wind power curtailment. In order to optimize the capacity of b ... more
A construction method to newly build narrow transmission tower inside the existing structure has been studied, and when the full-scale test was carried out, helical buckling was found out in the main pipe post. In the pr ... more
Key factors to achieve functional metal oxide films deposited on flexible polymer-film substrates are discussed. The use of reactive plasma deposition with dc-arc discharge is an effective coating method to grow the meta ... more
Periodic micro-swelling structure was fabricated on silicone rubber by the 193-nm ArF excimer laser induced photodissociation of silicone; subsequent deposition of Al thin film on the sample surface significantly improve ... more
To prevent photocorrosion of a Cu2O photocathode, composition of a TiO2 layer onto the Cu2O is one of the most effective solutions. For crystallization of the TiO2 layer alone without heat-damage to the underlying Cu2O l ... more
Small GeO2 single crystal was successfully grown on a polyvinyl chloride (PVC) substrate at room temperature in oversaturate aqueous solution. The oversaturated solution could be prepared at strong acid condition (pH～0) ... more
Development of field-effect transistors (FETs) using functional oxide films is currently an area of active research. To effectively modulate electrical conduction properties, the formation of oxide channel/gate insulator ... more
Most flexible polymer substrates are not heat-resistive. Therefore, flexible devices mainly consisted of amorphous oxides or organic materials showing excellent electric property and/or optical transparency because they ... more
Analysis of Electrical Characteristics of Advanced MOSFETs by using a Quantum Energy Transport Model
論文No: ページ数: 6 日付: 2019/03/01
著者: 平岡 徹也（京都工芸繊維大学大学院工芸科学研究科），廣木 彰（京都工芸繊維大学大学院工芸科学研究科）
キーワード : 量子エネルギー輸送モデル，量子効果，非平衡現象，デバイスシミュレーション quantum energy transport (QET) model，quantum effect，non-equilibrium phenomena，device simulation
Improvement of device simulation is necessary to improve efficiency of development of advanced MOSFETs miniaturized to nanoscale. In particular, improvement of the fluid simulation model with quick calculation make a sub ... more
It is well known that inverted pendulums are difficult to control because of its non-minimum phase and non-linear characteristics. Car robot type inverted pendulums are developed and it provides small spacing than four w ... more
Feature Extraction and Resident Number Prediction Method using Power Consumption Data
論文No: ページ数: 10 日付: 2019/03/01
著者: Masahiro Yoshida (Hiroaki Nishi Laboratory, Graduate School of Science for Opens and Environmental Systems, Keio University), Tomoya Imanishi (Hiroaki Nishi Laboratory, Graduate School of Science for Opens and Environmental Systems, Keio University), Hiro
キーワード : smart electric meter，feature extraction，feature selection，analysis of variance (ANOVA)，ARMA model，machine learning
A large amount of power consumption information generated from private houses is being aggregated nowadays, particularly by the spread of smart electric meters. Applications that utilize these data are widely studied, an ... more
The use of digital images has become quite widespread in legal, medical, and private contexts. However, anyone can easily edit or manipulate any digital image on a computer. In addition, the digital image are familiar to ... more
Evaluation of the Aid Link Generation System for a Disaster Management Platform
論文No: ページ数: 12 日付: 2019/03/01
著者: L Ernesto Dominguez-Rios (Graduate School of Information Science and Engineering, Ritsumeikan University), Takayoshi Kitamura (Ritsumeikan University), Tomoko Izumi (Osaka Institute of Technology), Yoshio Nakatani (Ritsumeikan University)
キーワード : Matching System，Social Network System，Disaster Mitigation，System Evaluation，Disaster Management，Self-relief communities
In recent days, people around the world are starting to be more aware of the disasters that are happening around the world. In most of the cases, technology is starting to play an important role as part of the preparedne ... more
The main battery capacity of fuel cell vehicles (FCVs) is about one-tenth that of pure electric vehicles because the primary purpose of the FCV main battery is compensation of fuel cell output power response. The smaller ... more
