CAJ | 학술논문

为了研究500kV超高压瓷支柱绝缘子加装复合增爬裙（CAS）后的覆冰闪络电压特性,在特高压交流试验基地的大型环境气候实验室开展了500kV瓷支柱绝缘子加装CAS和未装CAS的覆冰闪络试验。研究并分析了2种工况下支柱绝缘子覆冰状态、闪络电压、泄漏电流发展以及放电路径。研究结果表明,加装CAS的瓷支柱绝缘子可有效阻止冰棱的形成,并且增爬裙之间不会被冰棱桥接,其放电主要沿冰棱和气隙发展。在绝缘子表面有污秽的覆冰状态下,带有CAS的500kV瓷支柱绝缘子覆冰闪络电压大于最大运行相电压,较未装CAS的支柱绝缘子提高约58%。
위료연구500kV초고압자지주절연자가장복합증파군（CAS）후적복빙섬락전압특성,재특고압교류시험기지적대형배경기후실험실개전료500kV자지주절연자가장CAS화미장CAS적복빙섬락시험。연구병분석료2충공황하지주절연자복빙상태、섬락전압、설루전류발전이급방전로경。연구결과표명,가장CAS적자지주절연자가유효조지빙릉적형성,병차증파군지간불회피빙릉교접,기방전주요연빙릉화기극발전。재절연자표면유오예적복빙상태하,대유CAS적500kV자지주절연자복빙섬락전압대우최대운행상전압,교미장CAS적지주절연자제고약58%。
In order to analyze the icing flashover characteristics of post insulators with composite assistant shed（CAS）,we investigated the performance of energized 500 kV post insulators in the presence and absence of CAS by icing test in a large-scale artificial climate chamber,and analyzed the difference of ice appearance,flashover voltage,development of leakage current and discharge path between post insulators in the presence and absence of CAS.Test results demonstrate that CAS can decelerate icicle development in the insulators and the sheds will not be bridged by icicle,which results in its discharge path mainly along the icicle and air gaps.Due to the composite antipollution shed,in the condition of being seriously iced and polluted,the flashover voltage of 500 kV station post insulators is higher than the maximum running phase to earth voltage,which is 58% higher than normal post insulators.