变压器油浸纸电气参数分区反演优化算法  

Multi⁃regional Inverse Optimization Algorithm for Electrical Parameters of Oil⁃immersed Paper of Transformer

作　　者：谢一鸣 金硕 阮江军[3] 吴兴旺 杨海涛 吴杰 胡啸宇 吴昊 XIE Yiming;JIN Shuo;RUAN Jiangjun;WU Xingwang;YANG Haitao;WU Jie;HU Xiaoyu;WU Hao(Electric Power Research Institute of State Grid Anhui Electric Power Company,Hefei 230022,China;Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan 430068,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]国网安徽省电力有限公司电力科学研究院,合肥230022 [2]湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室,武汉430068 [3]武汉大学电气与自动化学院,武汉430072

出　　处：《高压电器》2023年第8期1-11,共11页High Voltage Apparatus

基　　金：安徽省自然科学基金资助(2208085UD18)。

摘　　要：在运变压器内油浸纸的老化和受潮状态具有空间上的分布特性,但目前的评估方法仅限于评估绝缘的整体状况,无法检测变压器内油浸纸局部区域的绝缘状况。文中为考虑局部绝缘问题,借鉴反演思想,以油浸纸材料电气参数(电阻率和低频相对介电常数)为直接特征量,提出基于有限元电场仿真技术的变压器油浸纸电气参数分区反演计算方法,获取局部区域电气参数。针对反演算法,提出NDM-Broyden法以改进原算法NRM的计算效率。最后通过XY模型对反演结果进行验证,试验结果表明,采用该方法可有效反演出XY模型不同区域油浸纸板的电阻率和低频相对介电常数,进而为判断变压器局部油浸纸的老化和受潮状态提供参考和新思路。The ageing and moisture state of oil-immersed paper in the transformer have spatial distribution character-istics,but the current assessment method has no way to detect the insulation condition of partial area of the oil-im-mersed paper inside the transformer but is only limited to the assessment of the overall insulation condition.For con-sidering partial insulation issue and with reference of inversion idea in this paper,the electrical parameters(resistiv-ity and low-frequency relative permittivity)of the oil impregnated paper is taken as the direct characteristic quanti-ties,and an inversion method of electrical parameters of multi-regional oil-immersed paper of transformer based on fi-nite element electric field simulation technology is proposed to obtain the electrical parameters of partial region.As for the inversion algorithm,the NDM-Broyden method is proposed to improve the computational efficiency of the orig-inal algorithm NRM.Finally,the inversion results are verified by XY model.The tests results show that the adoption of this method can effectively inverse the resistivity and low-frequency relative permittivity of the oil-immersed paper in different areas of XY model,thus providing a reference and new idea for judging the ageing and moisture state of partial oil-immersed paper in transformer.

关 键 词：油浸纸 电阻率 低频相对介电常数 反演 XY模型 

分 类 号：TM411[电气工程—电器]