高压电器2011，Vol.47Issue(8)：9-13,17,6.
直流负极性下雨滴对导线电晕特性的影响
Influence of Corona Characteristics of Water Drops on Smooth Conductor under Negative DC Voltage
摘要
Abstract
Corona phenomena on HVDC transmission lines will cause electromagnetic environment problems. UHVDC transmission line corona has become an important factor which affects the configuration and cost of construction of UHVDC transmission lines. With the development of power grid construction, corona problem of UHVDC transmission lines becomes a research focus. In the rainfall process, a lot of water drops will formed on the wire surface, which can change corona characteristics of transmission lines obviously. To study the influence of water drops on corona characteristics of DC transmission lines, the corona discharge process has investigated in a corona cage with one water drop attached to the surface of the high voltage conductor. The corona inception voltage and corona current characteristics of the saturated water drops or mist on the conductor surface were studied including the effect of the change of the water conductivity. The result shows that corona discharge with -one water drop on the surface of the conductor is a complex process including the deformation and ejection of small water drops, the ionization of the air around the tip of the water drop. When the conductor is attached with saturated water drops or mist, the corona inception voltage decreases to about 25% or 40% compared with that of smooth conductor. In the range of rainfall conductivity, the change of the water drop conductivity has less effect on the corona discharge characteristics.关键词
光滑导线/雨滴电晕/直流负极性:电导率Key words
smooth conductor/ water drop/ negative DC/ conductivity分类
信息技术与安全科学引用本文复制引用
王清亮,张璐,李舟,任保忠,范建斌,谷琛,张乔根..直流负极性下雨滴对导线电晕特性的影响[J].高压电器,2011,47(8):9-13,17,6.基金项目
国家电网公司科技项目(SGSC[2005]81). （SGSC[2005]81）
