CAJ | 학술논문

±800 kV特高压直流输电线路起晕特性是影响其线路结构和建设费用的重要因素.起晕特性与导线表面状态相关,而直流电压下导线表面更容易积污,更严重影响输电线路的电晕特性.为了深入研究特高压直流输电线路污秽电晕问题,利用电晕笼研究了导线表面分别附有不同表面密度的模拟污秽和碳粉时的起晕特性并分析了污秽对±800 kV特高压直流输电线路电晕特性的影响.结果表明:当导线表面分别附有模拟污秽和碳粉时,在实际特高压直流输电线路表面场强附近,随污秽度的增加,电晕电流的增加趋势不同.起晕电压随污秽度的增加呈负指数下降,有饱和趋势,其中碳粉污秽对负极性电晕起始电压影响最大.根据实验结论和仿真研究,初步得出了±800 kV特高压直流输电线路导线电晕起始电压与表面污秽度之间的函数关系.
±800 kV특고압직류수전선로기훈특성시영향기선로결구화건설비용적중요인소.기훈특성여도선표면상태상관,이직류전압하도선표면경용역적오,경엄중영향수전선로적전훈특성.위료심입연구특고압직류수전선로오예전훈문제,이용전훈롱연구료도선표면분별부유불동표면밀도적모의오예화탄분시적기훈특성병분석료오예대±800 kV특고압직류수전선로전훈특성적영향.결과표명:당도선표면분별부유모의오예화탄분시,재실제특고압직류수전선로표면장강부근,수오예도적증가,전훈전류적증가추세불동.기훈전압수오예도적증가정부지수하강,유포화추세,기중탄분오예대부겁성전훈기시전압영향최대.근거실험결론화방진연구,초보득출료±800 kV특고압직류수전선로도선전훈기시전압여표면오예도지간적함수관계.
We investigated the corona inception voltage and corona current characteristics of conductor when the surface of conductor was adhered with artificial contaminations of different densities and carbon powder respectively by use of an corona cage,and predicted corona inception voltage characteristics of±800 kV U HV DC polluted transmission lines primarily based on experimental and the results of simulation.The results show that at the level of actual surface voltage gradient of UHV DC transmission lines.corona current increases differently with the increase of contamination densities when the surface of conductor is adhered with artificial contaminations and carbon powder respectively.Corona inception voltage decreases follow the negative exponential function as the contamination densities increase in company with saturated tendency,and negative corona inception voltage is influenced most by carbon powder.Based on experimental results and the results of simulation,a function relationship is educed between corona inception voltage and surface contamination densities of±800 kV UHV DC transmission lines primarily.