Engineers who are good at handling high voltage are in high demand from the industries. On the other hand, the students who have experience dealing with high voltage are becoming rare. High voltage engineering is based o ... more
Most of the lighting in houses and commercial facilities has replaced to white LED lighting. Therefore, creatures such as moths attracted to fluorescent light and mercury lamp in the past are no longer less attracted. Ho ... more
In 1989 the International Electrotechnical Committee (IEC) adopted contact discharge testing of an electrostatic discharge (ESD) generator to reduce the variations in air discharge test results, and specified in IEC 6100 ... more
A Specific Relationship between Rise-Time and Peak of Discharge Current Waveform measured through IEC specified Electrode from Human Air Discharge
論文No: ページ数: 2 日付: 2022/11/01
著者: 戸澤 幸大（（株）ノイズ研究所），石田 武志（（株）ノイズ研究所），藤原 修（（株）ノイズ研究所／名古屋工業大学）
キーワード : 人体気中放電，IEC規定電極，立ち上がり時間，放電電流ピーク，簡易等価回路
human air discharge，IEC specified electrode，rise-time，discharge current peak，simplified equivalent circuit
The air discharge currents from two humans having different physique with a wide range of charging voltages from ±1 kV to ±15 kV are measured via an IEC specified electrode to reveal that a specific relationship holds be ... more
To realize a stable and economical supply of electric power, meteorological information is actively utilized in the operation and planning of electric power systems. This paper introduces the current status of meteorolog ... more
Simplified Utilization of PV Power Output Forecast for Reducing Imbalance Risk of Electricity Retailer using Battery Energy Storage System
論文No: ページ数: 8 日付: 2022/11/01
著者: 中村 美友（名古屋大学大学院工学研究科電気工学専攻），今中 政輝（名古屋大学未来材料・システム研究所），栗本 宗明（名古屋大学未来材料・システム研究所），杉本 重幸（名古屋大学未来材料・システム研究所），加藤 丈佳（名古屋大学未来材料・システム研究所），原田 耕佑（ENEOS（株）中央技術研究所），森田 圭（ENEOS（株）中央技術研究所）
キーワード : PV（太陽光発電）出力予測，小売電気事業者，インバランス，蓄電池
PV power output forecast，electricity retailer，imbalance，battery energy storage system
For improving the profitability of electricity retailers, it is important to reduce the penalty cost for the imbalance between a day-ahead planned electricity demand and the actual electricity demand on the day. To reduc ... more
Real-time Supply-demand Schedule Update and Operation for Generators and Battery Energy Storage System based on Forecasted and Actual Photovoltaic Power Outputs
論文No: ページ数: 13 日付: 2022/11/01
著者: 吉岡 大晶（名城大学理工学部電気電子工学科），西尾 晃二（名城大学理工学部電気電子工学科），高橋 康平（名城大学理工学部電気電子工学科），益田 泰輔（名城大学理工学部電気電子工学科），Rajitha Udawalpola（University of Ruhuna），大竹 秀明（（国）産業技術総合研究所 福島再生可能エネルギー研究所）
キーワード : 蓄電池システム，当日運用，太陽光発電，太陽光発電出力予測，発電機起動停止計画
battery energy storage system (BESS)，current-day operation，photovoltaic (PV) power generation，PV power generation forecast，unit commitment (UC)
The photovoltaic (PV) power output might be frequently curtailed to maintain electricity supply-demand balance in future power systems. In our previous study, we proposed a new method for updating the battery energy stor ... more
Constant Control during the Designated Time for Grid Code of Long-term Fluctuation of Wind Turbine Generator Systems and Forecast Error Adjusting Method
For the carbon neutral society, installation of renewable energies is increasing. In particular, expectations for Wind Turbine Generator Systems (WTGSs) have raised in Japan. However, since output of the WTGSs fluctuates ... more
Insolation Forecasting by using Image-processed Satellite Images Data and Forecasting of Cloud Imageries
論文No: ページ数: 8 日付: 2022/11/01
著者: Shoji Kawasaki (Department of Electronics and Bioinformatics, School of Science and Technology, Meiji University), Qingkun Wang (Department of Electronics and Bioinformatics, School of Science and Technology, Meiji University)
キーワード : insolation forecasting，photovoltaic generation，satellite image，neural network，ConvLSTM
Recently, there is a movement aimed at realizing distributed energy systems, especially photovoltaic power generation (PV) is expected in Japan, and it is expected that the number of interconnections of PV will increase ... more
A Review on Photovoltaic Power Forecasting Technics
論文No: ページ数: 9 日付: 2022/11/01
著者: 大竹 秀明（（国研）産業技術総合研究所 福島再生可能エネルギー研究所／気象庁気象研究所），高松 尚宏（（国研）産業技術総合研究所 福島再生可能エネルギー研究所），大関 崇（（国研）産業技術総合研究所 福島再生可能エネルギー研究所）
キーワード : 太陽光発電，予測技術，予測不確実性，予測のインパクト，気候変動
solar power，forecasting technology，prediction uncertainty，impact of solar power forecasting，climate change
A review of photovoltaic (PV) power output forecasting technology is presented based on the latest information in the literature. In addition to short-term ahead prediction and day ahead prediction techniques using numer ... more
As the introduction of renewable energy sources (RESs) increases, there is a concern that the inertia and synchronizing power of power systems will decrease and the system stability will deteriorate. In particular, if a ... more
Microgrid (MG) would be a promising option to improve energy efficiency and resiliency against disasters. However, one of the biggest motivations for deploying MGs on a commercial scale is to bring stable economic benefi ... more
Super High Frequency Wideband Measurement of Partial Discharge Current Waveform in Mineral Oil―Difference in PD Phenomena Depending on Degassing Treatment and Polarity Effect―
Liquid insulators have excellent cooling and insulation performance, but impurities and contaminants in the liquid or dissolved gases and moisture are known to have a significant influence on insulation performance. In t ... more
Assessment of DC Magnetic Fields under a 200kV DC Overhead Transmission Line
論文No: ページ数: 2 日付: 2022/11/01
著者: 椎名 健雄（（一財）電力中央研究所），宮島 清富（（一財）電力中央研究所），椙本 一登（東京電力パワーグリッド（株）），松野 秀明（東京電力パワーグリッド（株））
キーワード : 直流送電，架空送電線，電気環境，磁界，ビオ・サバールの法則
DC power transmission，overhead transmission line，electrical environment，magnetic field，Biot-Savart law
DC magnetic fields under the Hida-Shinano 200kV DC overhead transmission line were assessed by measurements. The DC magnetic fields observed under the DC overhead transmission line are a superposition of the geomagnetic ... more
In this paper, we have analyzed quantum confinement effects in nanosheet MOSFETs by using a quantum drift-diffusion (QDD) model. The QDD model is a device simulator which allows to simulate quantum confinement effects in ... more
The regenerative braking for electric vehicles is studied. The experimental device consisted of rotational load, three-phase synchronous motor, regenerative circuit and Electric Double Layer Capacitors (EDLC) as the ener ... more
DC bus systems are utilized to deliver powers to various motor loads. Inverters are placed just before motors to give appropriate powers. When the inverters are controlled to output constant powers, they may have negativ ... more
During sucking, the tongue undulates from the front towards the back of the tongue, showing peristaltic-like movements. We previously measured the tongue force of approximately 200 infants and have shown its dynamic prop ... more
The objective of this study is to develop a xerostomia diagnosis support system to evaluate the moistness of the oral cavity. A sensor unit was developed to measure the relative humidity by the change in voltage signal u ... more
Recently, many parallels and distributed processing systems employing FPGAs have been proposed, and the demand from companies and laboratories has been increasing. This paper describes implementation and evaluation of di ... more
With promotion of remote work associated with the Covid-19 pandemic and expansion of the market for shared offices, introduction of a hot-desking in offices will be accelerated. Under this situation, air conditioning sys ... more
The environment surrounding the electricity system in Japan is undergoing major changes, for example, the increase in facility management costs due to the ageing of facilities, and the change in business structure due to ... more
In this paper, a new feed-back controller reduction scheme is proposed. The two-degree-of-freedom(2DOF) control system has a feed-forward controller and a feed-back controller, thereby expanding the range of feasible tra ... more
Development of a Low Cost Crow Deterrent AI System
論文No: ページ数: 8 日付: 2022/11/01
著者: 伊藤 優太（中京大学），吉川 健太（中京大学），イ ジェフン（中京大学），ラシキア 城治（中京大学）
キーワード : 深層学習，画像処理，カラス被害解消
deep learning，Image processing，crow deterrent system
Damage caused by crows such as damage to crops, scattering garbage on the streets, assaulting people walking beneath their nests, etc. has become a problem in various parts of the country. There are several damage abatem ... more
Recently, visual inspection methods using deep learning have been proposed. In this paper, we propose a classification method using two-step deep learning. The first step is to determine whether the painting is a defect ... more
We quantitatively investigate the reduction of the voltage error caused due to deadtime by introducing multilevel inverters. In particular, the voltage errors of a flying capacitor multilevel inverter with carrier phase ... more
Condition monitoring techniques, which help in monitoring the operation status of on-board devices and vehicle environment from the driver cab, have been introduced in some railway vehicles. Most of these techniques cons ... more
Development of Si Power ICs and Evolution to SiC Large Electric Capacity Power ICs
論文No: ページ数: 13 日付: 2022/11/01
著者: 菅原 良孝（SiCパワーエレクトロニクスネットワーク）
キーワード : 誘電体分離IC（DIIC），SiC 誘電体分離パワーIC，Si 誘電体分離パワーIC，VLCS，ウェーハ直接貼付け，ワンチップインバータIC
Dielectrically isolated IC (DI IC)，SiC DI-HVPIC，Si DI-HVPIC，VLCS，Wafer direct bonding，One chip Inverter IC
In comparison to pn junction isolation ICs, dielectric isolation ICs have several advantages such as high blocking voltage, small isolation area, high thermal resistance and small interferences among integrated devices, ... more
At present, there is a growing demand for energy saving to prevent global warming. Thus, the railway industry is also focusing on energy saving methods. Power consumption of running trains has a large variation of approx ... more
