成果報告書詳細
管理番号20160000000169
タイトル*平成27年度中間年報 次世代洋上直流送電システム開発事業 システム開発 要素技術開発
公開日2016/5/28
報告書年度2015 - 2015
委託先名学校法人常翔学園 株式会社大林組 住友電気工業株式会社 一般財団法人電力中央研究所 国立大学法人東京大学 学校法人東京電機大学 東京電力株式会社 株式会社東芝 株式会社日立製作所 古河電気工業株式会社
プロジェクト番号P15002
部署名新エネルギー部
和文要約
英文要約1. HVDC System Development
By superposing the existing windy, environmental and social conditions, three prospective and feasible 500MW class offshore windfarm locations have been selected.
The survey of related projects and research has been performed for the planning and design of the HVDC and collection system. The survey has found that the optimization of the HVDC and collection system is one of major research areas in Europe and in the US. The development of the optimization tool of the HVDC and collection system has been started. It is also found that it is necessary in Japan to consider the limitation in the existing power system in the optimization process. In order to realize the optimal offshore grid connection design, a study to develop optimization system analysis tools has been carried out.

2. HVDC Component Development
In terms of submarine cable for offshore wind farms in Europe, cable installation figures, incidents, and its prevention methods were studied. Severe impacts were confirmed in the cable incidents in the whole offshore wind farm system. The incidents to prevent empirically will be considered for the case, not to prevent in the design stage.
A study on the construction technology of cable protection system has been carried out to gather information in relation to materials, equipment and methodology of cable protection, monopile entry and wind turbine cable installation. Considering cost and time reductions, a research on technologies to install three DC submarine cables simultaneously, high-speed installation equipment on vessel for cable protection unit and its materials has been conducted.
For the development of high-frequency transformer for HVDC system and case study of HVDC grid connection system, it was found that the 154 kV AC is the main voltage used and that the difficulty is the DC protection equipment cost. With the alternately wound coil and amorphous transformer, 70% reduction of high frequency resistance was confirmed compared to the normal winding transformer.
For the development of the multi-terminal HVDC system ensuring multivendor interoperability, input/output specifications for AC/DC converters in multi-terminal HVDC systems have been drafted. PSCAD/EMTDC models of the modular multilevel converter (MMC) was developed, and basic simulations of a two-terminal HVDC system consisting of these two MMC models have been carried out.
In order to realize the Hybrid DC Circuit Breaker which has advantages such as low conduction losses and ultra-fast current interruption capability, the development program for the each component has been started. The prototype tests and simulation results show the expected performance of each component.
Finally, the survey was conducted to examine typical features of the support structures for offshore substations in European waters and the environmental and geotechnical conditions of Japanese coastal areas.
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