【摘要】：混合凇覆冰導線表面會形成極其粗糙的冰凌及冰樹枝,使得覆冰表面電場發(fā)生畸變從而影響起暈電壓,但目前國內(nèi)外尚未深入分析混合凇覆冰對光滑導線起暈電壓的影響。為此,利用低溫低氣壓氣候試驗室,對混合凇覆冰光滑導線進行了交流條件下的電暈試驗。利用CoroCAM IV+紫外成像儀和I-U曲線擬合法測量了覆冰條件下導線的起暈電壓,建立了混合凇有限元模型,并進行了電場分析。結(jié)果表明:混合凇覆冰后,光滑導線的起暈電壓會出現(xiàn)跌落;隨著覆冰更加嚴重,光滑導線的起暈電壓會不斷下降,但下降速度逐漸減慢并趨于飽和;當施加的覆冰水電導率不同時,光滑導線的起暈電壓及其覆冰形態(tài)都無明顯變化。所得結(jié)論可為混合凇頻發(fā)地區(qū)的輸電線路設計提供理論依據(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：2524962