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| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：14765 |  | |
| 折扣與優(yōu)惠：團(tuán)購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要:我國水電開發(fā)主要集中在西南地區(qū),水電站壩址大多位于高山峽谷之間,由于地處山區(qū),遭遇雷擊的現(xiàn)象普遍存在。雷擊分直擊雷和感應(yīng)雷兩種，直擊雷直接在回路中產(chǎn)生強(qiáng)大的電效應(yīng),電壓峰值通常可達(dá)幾萬伏甚至幾百萬伏,電流峰值可達(dá)幾十千安乃至幾百千安,所以其破壞性往往相當(dāng)強(qiáng)大。感應(yīng)雷分為靜電感應(yīng)雷和電磁感應(yīng)雷。感應(yīng)雷通過靜電感應(yīng)聚集起大量與雷云極性相反的束縛電荷,瞬間放電后,產(chǎn)生的靜電電壓(感應(yīng)電壓)可達(dá)到幾萬到幾十萬伏，如此高的靜電電壓由于雷云放電,束縛力消失,快速變化的電流將產(chǎn)生強(qiáng)烈變化的感應(yīng)磁場,導(dǎo)致附近電力設(shè)備產(chǎn)生過大電流遭受破壞。本設(shè)計(jì)是在對雷電的形成、危害、雷擊形式和水電站防雷理論知識充分了解的前提下，到岔河水電站實(shí)地考察和學(xué)習(xí)，對岔河電站現(xiàn)有防雷配置進(jìn)行分析,再在理論上對其存在的不足進(jìn)行優(yōu)化和改進(jìn)，使之更加完善，能夠更好地對水電站進(jìn)行防雷保護(hù)。 關(guān)鍵字：水電站;防雷保護(hù);避雷針;避雷器
ABSTRACT:Hydropower development in China mainly concentrated in the southwest, hydropower station dam site is located in the mountains, canyons, mostly because is located in the mountains, a lightning storm phenomenon is widespread. Lightning lightning and induction lightning, lightning strike directly produce strong electric effect in the circuit, the voltage peak usually can reach tens of thousands of volts or even millions of volts, current peak value can reach tens of thousands or even hundreds of thousands of Ann, Ann so damaging often quite strong. Induction lightning is divided into static induction thunder and electromagnetic induction. Induction lightning through the electrostatic induction with thunder clouds gathered a large number of opposite polarity of bound charge, moments after discharge, the electrostatic voltage induced voltage can reach tens of thousands to hundreds of thousands of volts, so high, because the thundercloud electrostatic voltage discharge ShuFuLi disappear, rapidly changing, change induced magnetic field of current will produce strong, lead to too much power equipment near the current damage. This design is based on the formation, harm of thunder and lightning, lightning forms and hydropower station lightning protection under the premise of fully understand the theoretical knowledge, on-the-spot investigation and study to ChaHe hydropower station, the configuration of lightning protection for existing ChaHe power station is analyzed, then in theory the deficiencies for optimization and improvement to its, make it more perfect, better able to lightning protection of hydropower station. Keywords: Hydropower station; Lightning protection; Lightning rod; Lightning arrester.
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