王晓彤;项祖涛;陈珍珍;张笑弟;宁康红;陈宏伟;丁晓宇;彭明伟;

• 1:电网安全与节能国家重点实验室(中国电力科学研究院有限公司)
• 2:国网浙江省电力有限公司
• 3:中国能源建设集团浙江省电力设计院有限公司

摘要(Abstract)：

镇海-舟山输电工程在国际上首次使用500 kV XLPE海底电缆线路。基于电磁暂态仿真程序(EMTP),对500kV XLPE海底电缆线路的电气参数进行了计算和分析。结果表明,在一定的范围内,海水/土壤电阻率及相间/回路间距离对海底电缆线路的电气参数影响很小。金属护套与铠装焊接在一起或两侧终端站接地电阻为零时,海底电缆线路的零序阻抗和正序阻抗基本相同。采用铜丝铠装时,终端站的接地电阻对零序阻抗的影响较小;而采用钢丝铠装时,终端站的接地电阻对零序阻抗的影响显著。降低终端站的接地电阻或将护套与铠装焊接在一起,可降低零序阻抗。无论采用铜丝铠装、还是钢丝铠装,海底电缆线路电气参数的不平衡度均很低。单回和双回海底电缆线路可近似视为三相和六相平衡线路。该工程无须采取降低不平衡度的措施。

关键词(KeyWords)： 500 kV;交联聚乙烯;海底电缆线路;电气参数;零序阻抗;不平衡度

Abstract:

Keywords:

基金项目(Foundation): 国家电网公司科技项目(52110417000N)~~

作者(Author): 王晓彤;项祖涛;陈珍珍;张笑弟;宁康红;陈宏伟;丁晓宇;彭明伟;

Email:

DOI: 10.13335/j.1000-3673.pst.2018.0625

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