雷によるUHV送電線2回線事故の事例解析
スポンサーリンク
概要
- 論文の詳細を見る
The Tokyo Electric Power Company, Inc (TEPCO) plans UHV power network system in Japan in order to meet the steadily increasing demand for electricity. Four-hundred kilometer UHV-designed double-circuit transmission lines have already been constructed and are now operated at 500kV. Double-circuit flashovers on the UHV minami-iwaki transmission line occurred the first time with successful re-closing of the circuit in 2006.In this paper, we report on the melted OPGW500mm2, lightning location system (JDLN), oscillograph, and the phenomenon analyzed by using EMTP. The results are as follows: (1) Double-circuit flashovers on the UHV minami-iwaki transmission line occurred for the first time. The overhead ground wire (OPGW500mm2) was melted by lightning. (2) According to the oscillograph, the fault was occurred at the phase of 270 degrees. (3) Lightning peak current was about +265kA by using JLDN. The melted component wires of OPGW500mm2 were caused by the lightning, and the amount of melted wires was estimated at 3 wires in 1L, 4 wires in 2L. (4) From the result of EMTP analysis, the lightning peak current was +265kA, and the rise time was 2.5µs∼3.5µs. It shows that EMTP result doesn't contradict the lightning current estimated by JLDN.
著者
関連論文
- 日本の高構造物への落雷リスクの評価
- インパルス高電圧標準分圧器直角波応答パラメータの安定性
- 冬季の日本海側における送電線雷故障率の検討
- インパルス電圧測定系のアジア・太平洋地域国際比較試験
- 高電圧インパルス試験における計測標準の確立を目指して
- 雷電流の統計データを用いた配電線誘導雷スパークオーバ率評価
- 自然雷の負極性第1雷撃モデルとしての伝送線路モデル
- 建築物内直撃雷電流分布の数値電磁界解析
- 帰還雷撃に伴う電磁界波形の特徴の再現
- 急峻波サージが変圧器にあたえる影響