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成果報告書詳細
管理番号20190000000195
タイトル*平成30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2019/5/16
報告書年度2018 - 2018
委託先名学校法人常翔学園(実施:大阪工業大学) 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 東京電力ホールディングス株式会社 東京電力パワーグリッド株式会社 東芝エネルギーシステムズ株式会社 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
部署名スマートコミュニティ部
和文要約
英文要約Title: Next Generation Offshore HVDC System Research and Development Project (FY2015-FY2019) FY2018 Annual Report

I.HVDC System Development

1.The annual cost of the offshore HVDC network was calculated. The cost of HVDC platforms was re-evaluated based on the conceptual design of platforms. The total cost of the offshore HVDC network was reduced by about 30%.
2.The research on the control and protection scheme for the multi-vendor and multi-terminal HVDC system was carried out. For the PSCAD analysis, the terminal models with protecting functions were created.
3.A method to design the optimal submarine cable laying route linking offshore wind farm to onshore interconnection point is in state of developing based on marine environment and evaluation of cable laying cost.
4.A 33/154-kV wind power collector system was created in the EMT simulation program XTAP, and simulations of ferroresonance due to mal-operations of circuit breakers were carried out. A method to reduce harmonics generated on the ac side was studied.
5.The cost of offshore platforms was estimated for feasibility assessment. The technologies, social receptivity and rules for application of offshore HVDC to the interconnection lines were studied.

II.HVDC Component Development

1.Downsizing of offshore cable optimized by dynamic rating technology was examined, and the technology was successively adapted in the cable in conduit as well as that buried directly.
2.PSCAD/EMTDC model of a three-terminal HVDC system for DC fault analyses was built. The protection sequences for typical six cases of DC fault were completed. RTDS model of a five-terminal HVDC system was built.
3.DC±500kV symmetrical monopole HVDC model with 1500MW capacity was constructed. A frequency dependent DC cable model was created for DC grid faults simulations. The converter model for 5-terminal HVDC evaluation was constructed.
4.Making mechanical vacuum circuit breaker with higher voltage and greater reliability was considered. The layout for mechanical DCCB was considered to realize the low cost DCCB. The power supply by laser light for semiconductor breaker unit was verified.
5.For the downsizing of DC 500kV cable, cable joint technology was developed in different core sizes. Long-term reliability test was conducted successfully.
6.The cyclic and dynamic centrifuge model tests were conducted to evaluate the long-term stability of the suction foundation to find out the cyclic behavior of the suction foundation by wave load is similar to monotonic loading behavior.
7.A dynamic model for the wind turbine generator system using self-excited synchronous generator for current-source type wind farms were derived. The closed-loop control for controlling tip speed ratio of the wind turbine was proposed. A static wind turbine/generator simulator was developed.
8.The frequency dependence of the loss in the medium frequency transformer was estimated. New digital control using FPGA was developed and its effectiveness was confirmed.
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