CAJ | 학술논문

为了研究海拔高度对电晕笼分裂导线起始电晕电压特性的影响,建立电晕笼钢芯铝绞线起始电晕电压的计算模型,并开展相应试验研究。采用模拟电荷法计算钢芯铝绞线的空间电场强度。依据极不均匀电场下自持放电判据,建立不同海拔高度电晕笼分裂导线电晕起始电压的计算模型。在超/特高压人工环境气候试验室内,以500 m海拔高度为间隔,系统开展19~4-000-m海拔高度范围内六分裂导线起始电晕电压的试验研究。试验获得超高压电晕笼不同海拔高度下6-LGJ—400/50、6-LGJ—500/45分裂导线的起晕电压。计算获得不同海拔高度、分裂间距、导线分裂数及绞线表面粗糙系数下的导线起晕电压曲线族,以及不同绞线半径及最外层铝绞线股数的表面粗糙系数计算结果。分析结果表明：计算模型能够较好地计算电晕笼内绞线的起晕电压;在350~500-mm分裂间距范围内,分裂导线起晕电压随着分裂间距的增大而降低,随着导线分裂数的增加而升高;绞线表面粗糙系数与绞线最外层铝线半径与绞线半径之比相关。
위료연구해발고도대전훈롱분렬도선기시전훈전압특성적영향,건립전훈롱강심려교선기시전훈전압적계산모형,병개전상응시험연구。채용모의전하법계산강심려교선적공간전장강도。의거겁불균균전장하자지방전판거,건립불동해발고도전훈롱분렬도선전훈기시전압적계산모형。재초/특고압인공배경기후시험실내,이500 m해발고도위간격,계통개전19~4-000-m해발고도범위내륙분렬도선기시전훈전압적시험연구。시험획득초고압전훈롱불동해발고도하6-LGJ—400/50、6-LGJ—500/45분렬도선적기훈전압。계산획득불동해발고도、분렬간거、도선분렬수급교선표면조조계수하적도선기훈전압곡선족,이급불동교선반경급최외층려교선고수적표면조조계수계산결과。분석결과표명：계산모형능구교호지계산전훈롱내교선적기훈전압;재350~500-mm분렬간거범위내,분렬도선기훈전압수착분렬간거적증대이강저,수착도선분렬수적증가이승고;교선표면조조계수여교선최외층려선반경여교선반경지비상관。
In order to research the effect of altitude on corona onset voltage of corona cage bundle conductors,a calculation model for corona onset voltage of corona cage stranded conductors was established,and corresponding tests were performed.A charge simulation method was adopted to calculate the space electric field strength of the stranded conductor.According to self-sustained discharge criterion in severe Non-uniform electric field,a calculation model for corona onset voltage of corona cage bundle conductors at different altitudes was established.At the EHV/UHV artificial climate laboratory,corona onset voltages of six-bundle conductors were tested systematically at 19~4 000 m altitude range with 500 m interval.Corona onset voltages of corona cage bundle conductors 6 LGJ-400/50,and 6 LGJ-500/45 were obtained.Conductor corona onset voltage curves at different altitudes,bundle spacing,bundle numbers and surface roughening coefficient were obtained,and surface roughening coefficient calculation results at different stranded radius and numbers of outmost alum wires were obtained.Analysis results show that the calculation model can effectively calculate the corona onset voltage of a stranded conductor in a corona cage;with 350~500 mm bundle spacing range,a bundle conductor＇s corona onset voltage decreases as the bundle spacing increases,and increases as the bundle number increases;the stranded conductor surface roughening coefficient is related to the ratio of a stranded conductor＇s outermost aluminum wire radius and the stranded conductor＇s radius.