【摘要】：混合凇覆冰導(dǎo)線表面會(huì)形成極其粗糙的冰凌及冰樹(shù)枝,使得覆冰表面電場(chǎng)發(fā)生畸變從而影響起暈電壓,但目前國(guó)內(nèi)外尚未深入分析混合凇覆冰對(duì)光滑導(dǎo)線起暈電壓的影響。為此,利用低溫低氣壓氣候試驗(yàn)室,對(duì)混合凇覆冰光滑導(dǎo)線進(jìn)行了交流條件下的電暈試驗(yàn)。利用CoroCAM IV+紫外成像儀和I-U曲線擬合法測(cè)量了覆冰條件下導(dǎo)線的起暈電壓,建立了混合凇有限元模型,并進(jìn)行了電場(chǎng)分析。結(jié)果表明:混合凇覆冰后,光滑導(dǎo)線的起暈電壓會(huì)出現(xiàn)跌落;隨著覆冰更加嚴(yán)重,光滑導(dǎo)線的起暈電壓會(huì)不斷下降,但下降速度逐漸減慢并趨于飽和;當(dāng)施加的覆冰水電導(dǎo)率不同時(shí),光滑導(dǎo)線的起暈電壓及其覆冰形態(tài)都無(wú)明顯變化。所得結(jié)論可為混合凇頻發(fā)地區(qū)的輸電線路設(shè)計(jì)提供理論依據(jù)。
[Abstract]:The surface of mixed rime icing conductor will form extremely rough ice and ice branches, which will distort the electric field on the icing surface and affect the halo voltage, but the influence of mixed rime icing on the halo voltage of smooth conductor has not been deeply analyzed at home and abroad at present. For this reason, the corona test of mixed rime covered smooth conductor was carried out under AC condition by using low temperature and low pressure climate laboratory. The corona initiation voltage of conductors under icing condition was measured by CoroCAM IV ultraviolet imager and I 鈮，

本文編號(hào)：2524962