電力設備のための雷パラメータの選定法

カテゴリ: 技術報告

論文No: 1033

グループ名: 【B】電力・エネルギー部門

発行日: 2005/09/15

タイトル(英語): Lightning Parameters for Insulation and Protection Designs of Power Systems

著者名: 電力設備のための雷パラメータ選定方法調査専門委員会

著者名(英語): Investigating R&D Committee on Lightning Parameters for Insulation and Protection Designs of Power Systems

キーワード: Lightning parameters, Power systems, Lightning protection measures,Lightning observation, LLP system

要約(日本語): これまで雷電流波高値や波形の観測が継続的に行われてきたが，雷電流の波頭しゅん度や総電荷量(継続時間)の観測結果については不明確な点があった。特に日本海沿岸に発生する冬季雷は，その統計的な特性が明確には示されてこなかった。 また，耐雷設計手法の高度化の結果，雷性状の地域差，季節差を考慮した合理的な雷害対策を行うことが可能になってきた。このため，地域毎や季節毎の雷性状を正確に把握することが求められている。 以上の問題を解決すべく，わが国では，これまでの20年間，雷観測手法の高度化の試みが行われ，冬季雷に対してその統計的な雷撃特性を明らかにすることができるようになってきた。また，GPSを用いた落雷位置標定システムの測定結果の適用により，地域毎や季節毎の大地雷撃密度が，従来のIKLよりも正確に求めることができるようになってきた。 本報告は，これらの観測データを取りまとめると共に，合理的な雷害対策の実現や世界への情報発信に貢献することを目的としている。

要約(英語): The characteristics of wave front steepness and electric charges (duration time of waveforms) of lightning current were not clear, although the observation of peak values and waveforms of lightning current had been continuously done to now. Especially, the statistical characteristic had not been clearly shown about the winter lightning observed in the Sea of Japan coast. Moreover, reasonable lightning protection measures to consider regional and seasonal differences of lightning characteristics as a result of the upgrade of the lightning protection design method have been applied the actual system design. Therefore, the lightning characteristics of each region and season are requested accurately. To solve the above-mentioned problems, the upgrade of the lightning observation techniques has been carried out since about 1980, and it has become to be able to clarify the statistical characteristic of the winter lightning. Moreover, it has become to be able to observe the ground flash density at each region and season more accurately than IKL map by applying the measured results of the lightning location and protection system (LLP) with Global Positioning System (GPS). This report has aimed to summarize these observation data, and to contribute to the rational lightning protection design for power systems and the information sending to the world. The main investigations are as follows: 1. Lighting parameter for power systems a. Classification of lightning current waveform observed in winter b. Duration of wave front, duration of wave tail, continuous current, and electric charge c. Relationship among peak value, steepness and wave front of lightning current d. Lightning path impedance e. Return stroke model f. Velocity of lightning stroke g. Reliability of LLP and method of using the observed data by LLP h. Lighting Characteristics of geographical, regional and seasonal data 2. Sensitivity analysis for lightning protection measures 3. Data comparison with foreign countries 4. Lightning observation parameters that will be needed in the future

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