Lightning strikes affect wind power operations not only when accidents occur. If a wind turbine in the winter lightning area along the Sea of Japan is struck by lightning, the operator must promptly shut down the wind tu ... more
The AC tie-line model in power supply-demand and frequency analysis generally calculates the tie-line power flow only by the rotor angle deviation between control areas and the synchronizing torque coefficient. However, ... more
Grid forming inverters are expected to be installed in the utility grid in the near future, because they can provide inertia and short circuit capacity that are likely to decrease due to abolishment of thermal power plan ... more
In recent years, lightning strokes affects not only industrial facilities but also common households. In order to reduce the damage by lightning strokes, lightning observation have been actively conducted in various plac ... more
Effect of Different Cooling Methods on LCC Calculation of Generator-motors
論文No: ページ数: 10 日付: 2024/04/01
著者: Jinxiu Chen (Institute of Electrical Engineering, Chinese Academy of Sciences), Jie Liu (China Three Gorges Construction Engineering Corporation), Jiaxin Huang (Institute of Electrical Engineering, Chinese Academy of Sciences), Zhangbin Yang (China Three
キーワード : pumped storage power station，generator-motor，life cycle management，evaporative cooling
The pumped storage power station has a promising future and attention should be paid to maximize its economic benefits. Life cycle theory is an advanced method used to measure economics, the adoption of evaporative cooli ... more
Electric Vehicles Contributing to Power Systems by Playing a Role of Battery Energy Storage Systems
論文No: ページ数: 4 日付: 2024/03/01
著者: 田村 滋（明治大学総合数理学部）
キーワード : 電気自動車，V2G，定置用蓄電池，EVアグリゲータ，再エネ出力制御 electric vehicle，V2G，battery energy storage system，EV aggregator，renewable energy curtailment
The number of EVs is expected to increase rapidly toward carbon neutrality in 2050. They are also expected to contribute to power systems in the same way as BESS (Battery Energy Storage System) under massive renewable en ... more
This paper proposes an estimation method of actual load and PV output values in distribution systems using a power flow measuring instrument and smart meters. For distribution system operations, the requirement for estim ... more
The stable operation of the power system usually requires matching supply to demand. The Japanese government operates a balancing system. Power generation utilities and electricity retailers need to pay the imbalance cha ... more
A Study on Voltage Fluctuation and Transmission Loss in a Single-Machine Infinite-Bus System with High Penetration of Inverter-Interfaced Power Generation
Recently, the installed capacity of inverter-based resources (IBR), such as photovoltaic and wind power generations, has been sharply increasing in power systems across the world. The increase causes concerns on the incr ... more
Power transmission lines are vital infrastructures in our daily lives. We have developed a remote-controlled robot that can run on the transmission lines and capture clear images to improve the safety, accuracy, and effi ... more
In order to achieve net-zero carbon emissions by introducing enormous amount of renewable energy, it is essential to secure the reserve power to improve the power quality of the grid. On the other hand, improvement of th ... more
Methodology for Assuming Electricity Demand at the Detailed Regional Level at the Time of Mass PV/EV Diffusion and Estimation for Aichi Prefecture
論文No: ページ数: 10 日付: 2024/02/01
著者: 上野 剛（（一財）電力中央研究所），高木 雅昭（（一財）電力中央研究所），安田 昇平（（一財）電力中央研究所）
キーワード : 太陽光発電，電気自動車，電力需要，統計データ，地理情報システム
photovoltaic system，electric vehicle，electric power demand，statistical data，geographic information system
In this paper, a method to calculate electricity demand in the region based on scenarios regarding the future introduction of PV(photovoltaic system) and EV(Electric Vehicle) to the region were developed and were conduct ... more
Autonomous Voltage Fluctuations Control of Distribution System by Available Reactive Power of Fuel Cell Cogeneration System
論文No: ページ数: 8 日付: 2024/02/01
著者: 山本 周平（九州工業大学），渡邊 政幸（九州工業大学），牛房 義明（北九州市立大学）
キーワード : 燃料電池型コージェネレーションシステム，パワーコンディショナー，配電系統電圧制御，無効電力
fuel cell cogeneration system，power conditioning system，voltage control of distribution system，reactive power
Fuel cell cogeneration system has enough potential to control voltage fluctuations during day time. Hence, this paper presents a method for suppressing voltage fluctuations by controlling the reactive power output of fue ... more
The paper proposes a basic design of IEC 61850-based communication adapter consisting of a common module that performs majority of communication transformation processing and a custom module that primarily performs the m ... more
With the massive deployment of variable renewable energy for achieving net-zero, the need for balancing capacity is increasing. This study proposes a market bidding strategy method which is used by an aggregator that man ... more
Capacity market in Japan currently determines VoLL (Value of Lost Load) substantially and uniformly using reference procurement cost and target supply reliability, and can be regarded to be derived from a supplier's pers ... more
Towards carbon neutrality, microgrids (MGs) attract attention for the utilization of distributed energy resources including renewable energy sources. Since the scales and the structures of MGs heavily depend on their obj ... more
In recent years, wholesale power exchanges worldwide have begun to allow linked block order. In Japan, linked block order has been available since FY2024, with the expectation that it will eliminate concerns about missin ... more
With the promotion of large-scale renewable energy introduction policies aimed at a carbon-neutral society (Net Zero) and the increasing risk of electric power shortages, it is becoming increasingly important to utilize ... more
Optimal Operation Planning to Achieve Both Hydrogen Demand and Multi-DR for Large-scale Hydrogen Plant
論文No: ページ数: 8 日付: 2024/02/01
著者: 秋葉 剛史（東芝エネルギーシステムズ（株）），久保田 和人（東芝インフラシステムズ（株）），田丸 慎悟（東芝エネルギーシステムズ（株）），山根 史之（東芝エネルギーシステムズ（株））
キーワード : 最適化，混合整数計画，DR，水素，P2G
optimization，mixed integer programming，demand response，hydrogen，power to gas
This paper introduces an overview of the large-scale hydrogen plant FH2R and the mathematical optimization of the operation planning function in the energy management system that manages the entire FH2R facility. The ope ... more
Polygon thermal resistant aluminum conductors fiber reinforced (PLY-TACFR) conductors are expected to have lower electrical resistance, lower wind load, and lighter weight compared to conventionally used thermal resistan ... more
This study aims to quantify the amount of loss due to partial load of power conditioning system (PCS) and internal loss of storage battery in residential photovoltaic (PV) power generation and storage battery system by u ... more
Evaluation of the Failure Frequency of Surge Arrester taking into account the Reduction of Energy Capability due to Direct Lightning Strike to Distribution Lines
論文No: ページ数: 6 日付: 2024/02/01
著者: 杝 将実（（一財）電力中央研究所グリッドイノベーション研究本部），石本 和之（（一財）電力中央研究所グリッドイノベーション研究本部）
キーワード : 高圧配電線，避雷器，直撃雷，エネルギー耐量
medium voltage distribution lines，surge arrester，direct lightning，energy capability
Surge arresters (SAs) installed on distribution lines to prevent lightning outage may fail when the energy of lightning current flowing into SAs exceeds their withstand capability. Although the previous research has been ... more
Controllable load, such as hydrogen supplying equipment connected by a self-commutation type converter that can regulate active power, has been identified as alternative regulating resources to stabilize the power system ... more
As one of NEDO's international demonstration projects, a large-capacity hybrid battery storage system which consists of two types of battery cells with different charge-discharge characteristics was constructed in the st ... more
We have developed and demonstrated the energy system for large-scale hydrogen plant FH2R. The control function in this system achieves hydrogen supply using renewable energy and various types of Demand Response. This pap ... more
Large-scale introduction of electric vehicles (EVs) puts an electric load to the power system. Recently, the capacities of on-board batteries and the outputs of quick chargers have been increasing. Increase in the batter ... more
Development of a Maintenance Scheduling Method for Power Generators Considering Large Penetration of Variable Renewable Energy Sources and System Inertia
Conventional methods to schedule power generators maintenance aim to secure enough supply reserve margin to the power system when its power generators have to go under maintenance. However, the use of such methods in sce ... more
Dynamic Volt-VAR Control Application on High Penetration Photovoltaics System Against SVC Usage
論文No: ページ数: 7 日付: 2024/02/01
著者: Sandro Sitompul (Shibaura Institute of Technology), Haruka Maeda (Shibaura Institute of Technology), Ken Shimomukai (Shibaura Institute of Technology/Canadian Solar Project K.K), Goro Fujita (Shibaura Institute of Technology)
キーワード : voltage regulating devices，high penetration PV，reactive power control
Voltage rise is a significant challenge in the application of high-penetration solar photovoltaics (PV) to transmission systems. One explanation is a mismatch between PV power and load demand, which occurs regularly in J ... more
