成果報告書詳細
管理番号20130000000771
タイトル*平成24年度中間年報 米国ニューメキシコ州における日米スマートグリッド実証(19)
公開日2013/11/20
報告書年度2012 - 2012
委託先名富士電機株式会社
プロジェクト番号P09023
部署名スマートコミュニティ部
和文要約
英文要約Title: Japan-US New Mexico Smart Grid Demonstration (FY2012-2013) FY2012 Annual Report .

(1)Design and production of fuel cell & The performance test implementation in the factory of a fuel cell, and conveyance to a spot, and an assembly and an examination.
Design of a 100-kW fuel cell for the business district smart grid actual proof in Albuquerque and manufacture were performed.

(2) Evaluation of fuel cell performance at high ground
The power generation performance depends on the density of air of the driven place (partial pressure of oxygen) so that the fuel cell may use the oxygen in the air as a reacting substance. This time, the fuel cell performance is assumed to be different as the partial pressure of oxygen are lower than low ground because Albuquerque City is a high ground (1600m ), and the output voltage of the fuel cell lowers from the low ground. Moreover, it is expected to influence the combustion performance because the reformer uses it as a combustion air.
The acceptance test at factory is compared with various data in the demonstration site, and the fuel cell performance is evaluated at high ground.
The following data is acquired for the comparison and the evaluation at the acceptance test at factory and at site test.
・Fuel cell characteristic (IV characteristic)
・Voltage of fuel cell when air flow is changed when constancy output
・Combustion performance of reformer
From the above-mentioned data, the partial pressure of oxygen change at the time of high-ground operation grasps the influence which it has on a cell characteristic and the combustion performance of a reformer, and contributes to quality assessments, such as a power generation output in high ground, and a waste heat output.
What the calculated value which surveyed and converted atmospheric pressure and temperature by the examination in high ground agrees with the altitude which is known, and the relation of oxygen density mostly, and can predict by calculation was checked.


(3) Examination of the system-interconnection protection for the self-sustaining actual proof examination as BEMS.
As BEMS, when a commercial grid fell into an abnormal condition, the actual proof examination of the system configuration (self-sustaining) operated by the gas engine (GE) and a fuel cell (FC) where parallel off is carried out from a commercial grid (FC is operated with the form which carries out a grid connection to GE) was carried out.
However, at the time of self-sustaining, when a load change is large, the frequency change of GE occurs, Thereby, own frequency protection (a grid connection guideline of Japan is followed, and it is ±2.5% (OF:60Hz+1.5Hz, UF: 60 Hz - 1.5 Hz) of fundamental frequency) showed that FC shifted to standby (from GE to parallel off).
The frequency protection preset value of FC by frequency setting value change was changed, the change propriety of the protection preset value which does not damage a power generator and an inverter, and its influence were considered, and, as a result, it was considered as the following setup, and was considered as a setup which can cover the range which became clear.
A change value is determined as ±10Hz of fundamental frequency as a measure.
The value of the frequency to which FC is set was changed.
The change propriety of the protection preset value which does not damage a power generator and an inverter was examined.
The checked range shall be covered by making the result into a preset value.
The parallel off with an unnecessary grid became by change of this preset value.
The stable power supply of self-sustaining was able to be supplied.
Moreover, it has checked that there was also no instability of operation of breakage of FC inverter or the auxiliary machinery of FC power generator accompanying change of a protection preset value.
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