CAJ | 학술논문

电力变压器目前广泛采用的检修方式是定期检修,正确评估运行中变压器的可靠性水平是状态检修成功与否的关键,基于此,开发基于热点温度( Hot Spot Temperature,HST)的变压器寿命评估和优化检修模型,该模型中,以阿列纽斯的反应速率理论和威布尔分布为理论基础,描述变压器的老化过程,目的是为了求解变压器失效率λ,并通过指数形式的方程组来计算HST,即通过分别求解顶层油温相对于环境温度的温升,绕组HST相对于变压器顶部油温的增量和滞后的环境温度,从而得到绕组的HST (为前述三者之和). 同时基于该模型,开发基于Java语言和MySQL数据库的软件分析系统,该系统优化变压器检修流程,在软件系统中对热点区进行统计分析得到相应的诊断结果,同时提供了丰富的变压器检修分析模块及界面,可有效减少检修次数,提高变压器利用系数,提高设备的可靠性.
전력변압기목전엄범채용적검수방식시정기검수,정학평고운행중변압기적가고성수평시상태검수성공여부적관건,기우차,개발기우열점온도( Hot Spot Temperature,HST)적변압기수명평고화우화검수모형,해모형중,이아렬뉴사적반응속솔이론화위포이분포위이론기출,묘술변압기적노화과정,목적시위료구해변압기실효솔λ,병통과지수형식적방정조래계산HST,즉통과분별구해정층유온상대우배경온도적온승,요조HST상대우변압기정부유온적증량화체후적배경온도,종이득도요조적HST (위전술삼자지화). 동시기우해모형,개발기우Java어언화MySQL수거고적연건분석계통,해계통우화변압기검수류정,재연건계통중대열점구진행통계분석득도상응적진단결과,동시제공료봉부적변압기검수분석모괴급계면,가유효감소검수차수,제고변압기이용계수,제고설비적가고성.
Currently, the maintenance mode of power transformers which has been widely used is regular mainte-nance.It is key to correctly evaluate the reliability level of transformer in operation condition, which is directly related to the success of maintenance, on this basis, the power transformer lifetime evaluation and optimized maintenance model based on HST ( Hot Spot Temperature) is developed in this paper.In this model, the reaction speed theory of Arrhenius and Weibull Distribution as fundamental theories, which is used to describe the aging process of transformer and get the transformer failure rateλ, and then the equations with exponential form to compute HST, namely, calcu-late the top oil temperature relative to the environment temperature, and the increment of top oil temperature and the hysteretic temperature, thus it can get the HST ( equal to the sum of the aforementioned three variables) .Meanwhile, based on this model, the software analysis system based on Java language and MySQL database is developed, and the transformer maintenance process is optimized in the system, and then the statistical analysis is made to focus on the hot spot area in the designed system.Finally, the diagnosis results are obtained correspondingly.The designed model and system can effectively reduce the maintenance frequency, and improve the utilization coefficient of transformer, and the equipment reliability.