陈汉城,蔡金锭.考虑自由弛豫的油纸绝缘拓扑分析及状态评估[J].仪器仪表学报,2017,38(10):2597-2605
考虑自由弛豫的油纸绝缘拓扑分析及状态评估
Topology analysis and evaluation of oil paper considering free relaxation
  
DOI:
中文关键词:  拓扑分析  弛豫机构数  平均时间常数  自由弛豫因子
英文关键词:topological analysis  relaxation mechanism number  average time constant  free relaxation factor
基金项目:国家自然科学基金(61174117)项目资助
作者单位
陈汉城 福州大学电气工程与自动化学院福州350108 
蔡金锭 福州大学电气工程与自动化学院福州350108 
AuthorInstitution
Chen Hancheng College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China 
Cai Jinding College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China 
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中文摘要:
      提出一种考虑自由弛豫过程的变压器绝缘拓扑分析方法,该方法基于回复电压谱线的弛豫参数信息,从微观动力学出发,引入自由弛豫因子βi,从而获得包含不同介电弛豫响应信息的分支谱线,并确定变压器油纸绝缘弛豫拓扑结构。同时,对30多台变压器油纸绝缘弛豫参数与状态评估的关系进行研究,结果表明:弛豫机构数N、平均时间常数和自由弛豫因子βi均能反映油纸绝缘状态信息。随着变压器油纸绝缘老化程度加深,弛豫机构数N和自由弛豫因子βi增大,与之相反,平均时间常数减小。此外,自由弛豫因子βi在绝缘油劣化和绝缘纸老化的两种状态中具有不同的数值范围,可为变压器油纸绝缘老化评估提供新的思路。
英文摘要:
      A topology analysis method of transformer insulation is proposed, which considers free relaxation process. This method introduces free relaxation factor βi from microscopic dynamics, based on the return voltage line relaxation parameter information. The branch lines of different dielectric relaxation response information is obtained, and the topological structure of transformer insulation is determined. At the same time, the relationship between more than 30 sets of transformer insulation relaxation parameters and condition assessment are studied. The results show that number of relaxation mechanism number N, average time constant and free relaxation factor βi can reflect insulation status. As the aging degree of transformer oil paper insulation increasing, the number of relaxation mechanism N and the free relaxation factor βi are increasing, on the contrary, the average time constant is decreasing. In addition, free relaxation factor has a different scale in the deterioration of oil and paper, which can provide a new idea for transformer insulation aging evaluation.
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