For assist in color discrimination of color vision defects, the method of observing objects through colored filter have been known. If red filter, which absorbs mostly all light except red light, is used, only the red ob ... more
Inverter driving motors became more popular from the viewpoint of efficiency and controllability. In addition, demands for improving performance of the motors are also increasing such as high output or miniaturization. F ... more
Development of Musical Solid State Tesla Coil based on Pulse Repetition Frequency Method
論文No: ページ数: 5 日付: 2019/05/01
著者: 寺口 直希（神戸市立工業高等専門学校 電気工学科），南 政孝（神戸市立工業高等専門学校 電気工学科）
キーワード : 半導体式テスラコイル，演奏するテスラコイル，パルス繰り返し周波数方式 solid state tesla coil，musical tesla coil，PRF (pulse repetition frequency) method
A Tesla coil is a resonant transformer circuit that generates very high voltages which are made to arc through the air. Recently, a solid state Tesla coil was produced according to developing the semiconductor. In additi ... more
Water trees are generated and grow from the defects of XLPE cables when the cables are energized in the presence of water. The relationship between bow-tie tree (BTT, a kind of water tree) length and breakdown strength o ... more
In order to implement an electromagnetic (EM) shielding, approximation of perfectly matched layer (PML) used in FDTD analysis was proposed. One layer of the PML was approximated by a set of magnetic and dielectric layers ... more
To develop an optimal method for controlling post-harvest stem-end rot of mango, we examined to inactivate fungi on peduncle by using the dielectric barrier discharge (DBD) or the high-concentration ozone gas. The dielec ... more
Recently, it has been shown that cancer is able to be treated by nanosecond pulsed high electric field. We are studying the cancer treatment applying the electric field by electromagnetic wave. In this study, we have inv ... more
Quantification of Electron Confinement Effect of Confronting Divergent Magnetic Fields Applied to an Inductively Coupled Plasma and its Dependence on Control Parameters
The electron confinement effect of confronting divergent magnetic fields (CDMFs) applied to an inductively coupled plasma was quantified with a time constant for the electron escape, and its dependence on the magnetic fi ... more
Technologies concerning lightning, thermal plasma, and arc discharge are required to properly protect systems and equipment used in the power and energy field. In the industrial application field and the environmental fi ... more
Characterization of Pressure Rise due to DC Arc Simulating Lightning with Puncture Breakdown in Long Cylindrical Space under Supposition of the Inside of a Wind Turbine Blade
While wind turbine generators have widely spread as one of the renewable energy sources, lightning protection for the wind turbine generators has been becoming a very important issue because lightning damages of them may ... more
This paper describes a basic mechanism of Ag contact erosion by DC arc at the beginning of the contact break in low-voltage switch. We focused on the relationship between the contact erosion and the arc duration, and fou ... more
For an experimental DC motor equipment immersed in ethanol and gasoline, commutator currents were measured at various rotational speeds to find out an arc duration time during commutation process and a residual current. ... more
The vacuum arc cathode spot can be applied to pretreatment of thermal spray because it can remove oxide layer on the metal surface. However, the cathode spot affected by the oxide layer remains unclear. Few studies have ... more
The arc affected by the lateral gas is deflected to leeward, and the problem of heat transfer decrement occurs in the base metal at the arc welding. The elucidation of arc deflection is necessary with the lateral gas. It ... more
Design of Robust Waste to Energy Network and its Risk Assessment at Failure
論文No: ページ数: 8 日付: 2019/05/01
著者: 関根 諒一（東京電機大学），菅原 秀雄（東京電機大学），加藤 政一（東京電機大学），小山 俊彦（東京ガス（株）），片山 州央（東京ガス（株））
キーワード : ごみ発電，ごみ発電ネットワーク，自己託送，モンテカルロ法，仮想電源 waste to energy，waste to energy network，self-wheeling，Monte Carlo method，VPP
Since waste to energy (WTE) can't generate power for a long period due to unexpectable failure, periodical maintenance etc., WTE network, that exchanges electric power between incineration plants is one of the most reali ... more
An installation of solar power generation system was limited to places with good sunshine conditions, but it tends to be built in various places and areas. Generated electric power is influenced by various factors such a ... more
This paper proposes dependable Multi-population Improved Brain Storm Optimization with Differential Evolution (MP-IBSODE) for optimal operational planning of energy plants. The problem can be formulated as a mixed-intege ... more
In this paper, photovoltaics (PV) outputs are not only limited constantly but also controlled by bidirectional communications to compensate short period power fluctuations. In this case, if qualities of communication sys ... more
論文No: ページ数: 7 日付: 2019/05/01
著者: 餘利野 直人（広島大学大学院工学研究科），Emil Popov（広島大学大学院工学研究科），由良 典久（広島大学大学院工学研究科），六箱 凌佑（広島大学大学院工学研究科），中村 優希（広島大学大学院工学研究科），佐々木 豊（広島大学大学院工学研究科），造賀 芳文（広島大学大学院工学研究科），杉山 弘幸（中国電力（株））
キーワード : 電力系統，過渡安定度，臨界安定条件，臨界トラジェクトリー，エネルギー関数法 electric power system，transient stability，critical condition of stability，critical trajectory，energy function
This paper investigates a critical condition of transient stability that holds on critical trajectory at the stability boundary. While the conventional BCU theory states that critical trajectory converges an unstable equ ... more
Supply Reliability Index using Risk Sensitive Value Measure
論文No: ページ数: 7 日付: 2019/05/01
著者: 古川 義英（熊本大学大学院 自然科学研究科），宮内 肇（熊本大学大学院 自然科学研究科），三澤 哲也（名古屋市立大学 大学院経済学研究科）
キーワード : 供給信頼度，リスク鋭感価値尺度，内部リスク回避度，モンテカルロ法 supply reliability，risk sensitive value measure，inner rate of risk aversion，Monte Carlo method
Loss-of-load probability (LOLP) and expected unserved energy (EUE) are common as the power supply reliability indices based on probabilistic theory from the view point of the adequacy. These conventional indices are expe ... more
This paper presents economic evaluation of storage battery systems which increase the self-use of PV output at houses and buildings. The selling price of PV generated energy is decreasing. Battery energy storage systems ... more
Lightning Current Distribution in Automation System Equipment for Distribution Line due to Direct Lightning Stroke
論文No: ページ数: 8 日付: 2019/05/01
著者: 石本 和之（（一財）電力中央研究所 電力技術研究所），原 慎吾（九州電力（株）送配電カンパニー 配電本部），浅川 聡（（一財）電力中央研究所 電力技術研究所），新井 伸隆（（一財）電力中央研究所 電力技術研究所），森 亮太（（一財）電力中央研究所 電力技術研究所）
キーワード : 配電線，配電自動化システム，耐雷設計，雷電流分布，接地方式 distribution lines，distribution automation system，lightning protection design，lightning current distribution，grounding system
In Japan, in order to improve supply reliability and power quality, distribution automation system has been widely introduced. However, automation equipment such as automation switch and its controller consists of many l ... more
Deployment of Best Mix of Power Generation Over 7 Years 9 Months After 2011 Large Disasters
論文No: ページ数: 14 日付: 2019/05/01
著者: 白川 晋吾（東京理科大学）
キーワード : 2011.3.11大震災，電力，火力発電，太陽光発電・水力・揚水発電，原発，電力自由化，電気技術史 2011.3.11 Large Disaster，electric power，thermal power generation，solar・hydroelectric・pumped storage power plants，nuclear power plants，deregulation of electric power，history of electrical engineering
Natural disasters, 2011.3.11 tremendous Earthquake M9・Tsunami, and 2018.9.6 Earthquake M6.7 etc. have changed conventional sense of electric power. Learning from disasters, this paper describes electric power elapsed ove ... more
Environmental regulations such as RoHS are essential considerations in industry, however, it is almost not considered in technology education in secondary schools although the Courses of Study refers the relationship bet ... more
Autonomous driving technologies have dramatically progressed these years. One of the challenges to autonomous driving is disengagement caused by unexpected situations such as occurrences of construction sites, passing of ... more
In this study, an Indoor MEssaging System (IMES) was used to determine walking positions in an indoor situation at rates of50 and 250 bps in a ship, transmitting powers of-65and-85 dBm. And furthermore, BLE (Bluetooth Lo ... more
This paper proposes a virtual stamp rally system called Ugosta, and also describes the actual achievements of its prototype. A virtual stamp rally is an activity that the avatar of a player visits several places in a vir ... more
Low-Intensity Identification System for Surgical Instruments using UHF band Passive RFID for Effective Prevention of Human Error
論文No: ページ数: 7 日付: 2019/05/01
著者: 保坂 良資（湘南工科大学工学部人間環境学科）
キーワード : UHF帯パッシブRFID，弱電界，手術器械認証 UHF band passive RFID，low field intensity，identification for surgical instrument
Vestigial remnant of surgical instruments in the body is a serious problem. Two dimensional symbol is being used to help manage this problem. However, the symbols have to be identified one at a time, since the symbols ar ... more
Spatio-temporal patterns of neural activities develop repeatability, diversity, and hierarchy. In the present study, we attempted to elucidate how these dynamical properties are associated with a network structure in pri ... more
