CAJ | 학술논문

实现电力变压器状态的准确评估不仅是施行状态检修的核心与基础,同时也是发展智能电网的需要。针对电力变压器故障机理错综复杂和本体绝缘状态具有不确定性,因而难以客观有效评估的问题,以220kV油浸式电力变压器为研究对象,提出了基于物元可拓分析的电力变压器本体绝缘状态评估策略。在对其本体状态评估物元分析的基础上,构造了各评估指标的关联函数,指标关联函数值在正常运行的量变范围内为正,当量变突变到质变时关联函数值取负;通过研究关联函数值与变压器状态的对应关系,探讨了变压器的状态评估策略。实例分析并与其他评估方法比较证明：该方法行之有效,基于物元可拓分析的电力变压器状态评估策略可以为实施状态检修提供参考。
실현전력변압기상태적준학평고불부시시행상태검수적핵심여기출,동시야시발전지능전망적수요。침대전력변압기고장궤리착종복잡화본체절연상태구유불학정성,인이난이객관유효평고적문제,이220kV유침식전력변압기위연구대상,제출료기우물원가탁분석적전력변압기본체절연상태평고책략。재대기본체상태평고물원분석적기출상,구조료각평고지표적관련함수,지표관련함수치재정상운행적량변범위내위정,당량변돌변도질변시관련함수치취부;통과연구관련함수치여변압기상태적대응관계,탐토료변압기적상태평고책략。실례분석병여기타평고방법비교증명：해방법행지유효,기우물원가탁분석적전력변압기상태평고책략가이위실시상태검수제공삼고。
Condition assessment of power transformer is not only the critical step of condition-based maintenance,but also the need for the development of smart grid.Consequently,we studied the strategy for condition assessment of oil-immersed power transformers（220 kV）.because the insulation states and failure mechanisms of large power transformers are complex,uncertain,and difficult to assess their conditions effectively,we proposed an assessment strategy for transformer insulation condition by the matter element analysis method.The insulation evaluation matter element was analyzed firstly,and then the correlation functions of assessment indicators were structured.The results reveal that the correlation function value is positive when it is in the normal operation,and it turns to negative when the indicators have qualitative change.Case analysis verifies that strategy based on the matter element analysis can provide a reference for condition-based maintenance.