著者

矢部 邦明 林 泰弘

出版者

一般社団法人 エネルギー・資源学会

雑誌

エネルギー・資源学会論文誌 (ISSN:24330531)

巻号頁・発行日

vol.40, no.3, pp.69-77, 2019 (Released:2019-05-10)

参考文献数

17

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This paper presents the change of CO2 emission when battery energy storage systems (BESS) are used for increasing self-use of PV energy from rooftop panels, and for decreasing PV output curtailment. A traditional evaluation uses an annual CO2 emission intensity and the charge-discharge loss is evaluated, and then the emission is increased. However, when PV system is largely penetrated and the PV energy curtailment is required by power system constraints, BESS can decrease the curtailment as well as the evening demand when the rate of thermal power is large, and increase the daytime demand when the rate of PV energy is high. So, BESS can decrease CO2 emission considering hourly CO2 emission intensity. Authors quantify these effects by use of an optimization model to minimize annual power generation costs, and a model to minimize annual costs of houses with PV and BESS, and then shows energy chain diagram including energy flow between generation plants and customers. The CO2 emissions from business use customers with PV and BESS, and power charging demand for EV are also evaluated using hourly CO2 emission intensity. Authors show BESS can decrease CO2 emission.

著者

橋本 浩平 三ツ間 友里恵 吉岡 大志 松林 泰弘 鈴木 亜希子 羽入 修 曽根 博仁

出版者

新潟医学会

雑誌

新潟医学会雑誌 (ISSN:00290440)

巻号頁・発行日

vol.130, no.2, pp.140-141, 2016-02

著者

林 泰弘 松木 純也 鈴木 良治 武藤 英司

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.125, no.9, pp.846-854, 2005

被引用文献数

34 17

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Sending voltage profile of distribution feeder is controlled by changing a tap of distribution transformer. In a distribution network with distributed generators, for reasons of effect of reversed flows from them and existence of a great number of sending voltage profile candidates, it is not easy to control sending voltage profile within the acceptable voltage limit. In this paper, in order to determine the optimal sending voltage profile of distribution transformer in a distribution network with distributed generators, the authors propose a new method to determine the optimal sending voltage profile so as to minimize total number of tap position's change per day under constraints of acceptable voltage limit. In the proposed method, after calculating acceptable range of three phase voltage of distribution feeder, the optimal profile of tap position within the calculated acceptable voltage range is determined among these candidates by using reduced ordered binary decision diagram (ROBDD) which is an efficient enumeration algorithm. In order to check the validity of the proposed method, numerical simulations are carried out for a distribution network model with a distributed generator.

著者

林 泰弘 松木 純也 佐藤 和久 得能 裕子

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)

巻号頁・発行日

vol.123, no.10, pp.1172-1179, 2003-10-01

被引用文献数

1

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Local power systems (66kV) are served from the 275kV or 154kV substations. In order to maintain power supply reliability, the transmission lines are connected to several substations, and the operational configuration is radial. Since practical local power system has a number of transmission lines, many configuration candidates occur. It is expected to effectively evaluate these configuration candidates from various viewpoints such as reliability of power supply, transmission loss and so on. In this paper, the authors propose a multi objective evaluation method by using deterministic and probabilistic approaches for local power system configuration. In the proposed multi objective evaluation method, after selecting system configuration candidates which satisfy N-1 security by using an optimization method based on Boolean function, these candidates are evaluated from viewpoints of expected outage time, transmission loss and facility operation rate. In order to check the validity of the proposed method, numerical results are shown for a practical local system model with about 39 × 10<SUP>27</SUP> configuration

著者

荒牧 憲隆 山本 健太郎 平 瑞樹 林 泰弘 根上 武仁

出版者

公益社団法人 地盤工学会

雑誌

地盤工学ジャーナル (ISSN:18806341)

巻号頁・発行日

vol.9, no.3, pp.309-322, 2014 (Released:2014-09-30)

参考文献数

28

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宮崎県と鹿児島県の県境,霧島山中央部に位置する新燃岳において,2011年1月19日から始まった52年ぶりの噴火は,新燃岳火口から南東方向に大量の火山灰を降らせた。発生した火山灰の量は,4,000万~8,000万tと推定されており,宮崎県南部周辺の広範囲で降灰が確認されている。この突発的な火山災害により,斜面等に降り積もった火山灰堆積地盤での降雨や火山性地震による安定問題や処分された火山灰のリサイクル方法が重要な課題となってくる。本研究は,上記のことを鑑み,新燃岳より噴出した火山灰を用いて,新燃岳火山灰質土の物理・力学性質を実験的に検討し明らかにすることを目的としている。その結果として,噴火直後の火山灰質土の物理・力学特性は,砂質土と概ね類似した傾向を示し,リサイクル材として有用な材料であることが示された。しかし,火山灰質土特有の性質も包含しており,凍結融解の繰返しにより火山灰質土が細粒化していくことが認められ,物理的な風化の影響により材料特性が経時的に変化していくことが予想される結果となった。

著者

矢部 邦明 林 泰弘

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.138, no.2, pp.175-182, 2018-02-01 (Released:2018-02-01)

参考文献数

12

被引用文献数

1 3

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This paper presents an evaluation of economical capacity of storage batteries equipped with residential PV systems. In around 2019, many of power companies' ten-year contracts with PV system owners will come to expire, pushing down the selling price of PV generated energy. This, if combined with a declining battery price, would make it more economical to self-consume PV generated energy than selling the electricity to the utilities. The authors explore the optimized storage battery capacity and charge-discharge pattern by using load and PV output data of 200 houses, and by linear programming. Results show 5.8kWh battery is suitable for an average house with 4.5kW PV system when the battery system price is about ¥60,000/kWh. The authors analyze the daily storage start timing's impact on reverse power which affects power system operation, the optimum combination of PV and battery capacity, and each house's deciding factors for optimum storage capacity and so on.

著者

矢部 邦明 林 泰弘

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.139, no.5, pp.363-371, 2019-05-01 (Released:2019-05-01)

参考文献数

17

被引用文献数

6

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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 (BESS) can increase the self-use of PV output, and decrease the volume of buying electric power. So, the introduction of BESS to houses and buildings equipped with PV systems will be economical when the price of BESS is decreased enough. Authors investigated the optimum BESS capacity and hourly charge-discharge pattern for a year, then evaluated annual cost. Daily load pattern of each house and building, and time-of-use electric rates affect the conditions to make BESS cost-effective. Such conditions are shown in this paper.

著者

兌 瀟偉 伊藤 雅一 藤本 悠 林 泰弘 朱 桂萍 姚 良忠

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.139, no.3, pp.212-224, 2019-03-01 (Released:2019-03-01)

参考文献数

34

被引用文献数

3

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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 battery storage for mitigating forecast error, firstly it is necessary to improve the accuracy of forecast error model. This paper proposed a modeling method of forecast error time series in usage of beta distribution. Varying with forecast output, parameters of the beta distribution are estimated by maximum likelihood estimation. Autocorrelated forecast error obeying beta distribution is generated by correlated Monto-Carlo simulation. Based on the forecast error model, an optimization method is proposed to determine the optimum size of battery storage for mitigating forecast error. Through maximizing the total profit composed of electricity sales revenue, penalty and battery cost, the optimum size of battery storage is calculated. The results show that the forecast error model proposed in this paper is able to simulate both probability density function and autocorrelation correctly, which is beneficial to improving the accuracy and economy of battery storage sizing.

著者

宇田川 剛 林 泰弘 高橋 尚之 松浦 康雄 森田 智比古 南 雅弘

雑誌

電気学会研究会資料. PE, 電力技術研究会

巻号頁・発行日

vol.2011, no.57, pp.19-23, 2011-09-28

参考文献数

5

著者

赤城 ゆかり 山中 昇 林 泰弘 九鬼 清典 寒川 高男 木村 貴昭

出版者

日本口腔・咽頭科学会

雑誌

口腔・咽頭科 (ISSN:09175105)

巻号頁・発行日

vol.6, no.2, pp.7-12, 1994-02-28 (Released:2010-06-28)

参考文献数

8

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Palmoplantar pustulosis (PPP) has been accepted as one of the secondary diseases caused by tonsillar focal infection ; however, the pathogenesis is still unknown. In this study, the expression of adhesion molecules on the palmar and plantar skin of eight patients with PPP and three healthy volunteers with normal skin were examined immunohistochemically. In normal skin, only CD44 was expressed on the epidermis. In the macroscopically normal region of PPP skin, intercellular adhesion molecule-1 (ICAM-1) was demonstrated on the endothelial cells in the dermis. In the erythema stage and the pustule stage, CD3, CD4, and lymphocyte function-associated antigen-1 (LFA-1) were expressed on the cells infiltrating the dermis. ICAM-1 was detected immunohistochemically on the endothelial cells, keratinocytes and infiltrating cells in PPP skins. Moreover, endothelial cell-leukocyte adhesion molecule-1 (ELAM-1) was expressed on vessels in the dermis in these two stages. These findings suggest that the interaction between LFA-1 and ICAM-1 plays an important role in T cell infiltration into PPP skin and that the continuity of ICAM-1 expression is related to the chronicity of PPP.

著者

林 泰弘

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)

巻号頁・発行日

vol.129, no.4, pp.491-494, 2009-04-01

被引用文献数

49 36

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The number of installation of Distributed Generators (DG) such as photovoltaic and wind generations has been rapidly increasing in the world. Penetration of DG can contribute to reduce CO₂ emissions and conserve energy. On the other hand, since reverse power flow from DG to distribution system occurs exceed of the upper limit of adequate range of voltage, various voltage control methodologies have been proposed in order to keep voltage within the secure range. This paper describes several advanced voltage control technologies and shows the trend and future perspective about the control of distribution system with many DGs.

著者

大見 美智人 林 泰弘 北園 芳人 小池 克明

出版者

熊本大学

雑誌

基盤研究(B)

巻号頁・発行日

1998

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本研究では電気探査とMT法とを併用して地下浅部・深部の比抵抗分布を明らかにし,それから3次元的な温度分布構造を推定するための手法について検討した。この目的のために九州中部の阿蘇山を研究対象に選んだ。本研究の成果は以下のようにまとめられる。1.ラドンの移動の数値シミュレーションとラドン原子数算定理論により,ラドン濃度の空間的分布から,幅・傾斜方位・傾斜角度に関する断層の形状を推定することが可能になった。また,熱水の通路となる断層上のラドン濃度は,火山性地震などに起因して大きな時間的変動を示すことが明らかとなった。2.衛星画像と数値地形モデルとの組み合わせにより,熱水流動に影響を及ぼす断裂系の分布形態(走向・傾斜,分布密度)が推定できるようになった。3.一般に坑井データは分布密度が低く,深度も限られており,直接データを補間しても温度分布の特徴が得られない。これを改善するためにニューラルネットワークと地球統計学とを組み合わせたところ,地表面から標高2kmの深度までの温度分布が3次元的に推定できるようになった。この分布モデルから断層の存在が温度分布に及ぼす影響や熱水の流動形態が把握できる。4.活断層のように最近動いた履歴のある断層であれば地表面近くで比抵抗が低下する。断層の深部での比抵抗は一様でなく,特に破砕度が大きいと推察される部分の比抵抗は低い。阿蘇山火口西側の断層の推定分布域では比抵抗の異方性が顕著で,TEモードとTMモードとでは分布傾向が大きく異なる。5.阿蘇山火口西側においてMT法によって推定された比抵抗と数値シミュレーションに基づく推定温度との関係を検討し,概ね温度が高いほど比抵抗が高くなるという傾向を明らかにした。また,同じ温度でも熱水の上昇域で比抵抗が低下する現象も見出された。

著者

木村 貴昭 山中 昇 九鬼 清典 林 泰弘 斉藤 匡人 木下 和也 田村 真司 赤城 ゆかり 山本 良一 玉置 かおり 高野 郁晴 保富 宗城 戸川 彰久 山室 日出子 島田 純 藤原 啓次 寒川 高男 神人 崇

出版者

The Society of Practical Otolaryngology

雑誌

耳鼻咽喉科臨床 (ISSN:00326313)

巻号頁・発行日

vol.90, no.1, pp.121-130, 1997-01-01

被引用文献数

2

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A comparative study was performed for the purposes of studying the prophylactic effectiveness of an antecedent treatment for Japanese cedar pollinosis with DAREN^® (emedastine difumarate), an anti-allergic drug. Thirty-five cases (A group) received the drug at 4mg/day at least 2-4 weeks before the day when the pollen began to scatter. Another thirty-nine patients received the treatment after the scattering (B group). A significant inter group difference was observed in the global improvement rate for pollinosis. These findings suggest that DAREN^® produces a slow, long-acting effect such as the inhibition of the release of chemical mediators. Prophylactic medication seems to be suitable for the treatment of Japanese cedar pollinosis, because sufficient anti-allergic action is obtained a few weeks later. Side effects occurred in 6.9% of all of the cases, but the incidence was lower than with any other anti-allergic drug previously reported.<br>In summary, a prophylactic treatment with DAREN^® is effective in treating Japanese cedar pollinosis.