報告書番号

R05012

タイトル（和文）

瞬時電圧低下時の分散形電源応答特性 -分散形電源脱落特性の実験による評価-

タイトル（英文）

Operating characteristics of distributed generations under voltage dip conditions -Experimental evaluation of cut off characteristics of distributed generations-

概要 （図表や脚注は「報告書全文」に掲載しております）

電力系統に分散形電源が大量に連系された場合、配電系統等のローカルな系統での電力品質や保護・保安への影響に加えて、系統全体への影響も懸念されている。特に、基幹系統での擾乱によって分散形電源が一斉解列されるような場合には、系統安定度の低下が懸念されている。このため、特に影響が大きいと考えられる上位系統での瞬時電圧低下時の各種分散形電源の応答を実験により求め、分散形電源の脱落条件を明らかにした。その結果、高圧連系の分散形電源では0.5秒以下の瞬時電圧低下では脱落が生じないが、低圧連系の場合には10～30%以上の電圧低下で解列する可能性があることを明らかにした。

概要 （英文）

In case of large penetration of grid interconnected distributed generation systems, influences for whole power system should be considered in addition to the power quality problems and safety protection coordination schemes in local distribution systems. Especially, if large amount of distributed generation systems are disconnected at the same time due to the disturbances in power transmission systems, instability of whole power system may increase that lead to the collapsing of power system. In this report, operation characteristics of distributed generation systems under voltage dip conditions, which is considered as most severe condition for power system stability, were examined experimentally. By examining the result of experiments, disconnecting conditions for distributed generations were obtained. In case of interconnection of distributed generations to high voltage distribution systems, no disconnection of generation system will occur for under 0.5 second voltage dip. In case of interconnection of distributed generations to low voltage distribution systems, disconnection of generation system may occur for more than 10 to 30% dip of voltage regardless of time period of voltage dip.

報告者

キーワード