油纸绝缘变压器混联等效电路模型的构建  

Study of a Hybrid Equivalent Circuit of Oil-paper Insulation Transformer

作　　者：林智勇 邓伟琼 李燕 周薇 张达敏 LIN Zhiyong;DENG Weiqiong;LI Yan;ZHOU Wei;ZHANG Damin(School of Electrical Engineering&Automation,Xiamen University of Technology,Xiamen 361024,China;School of Optoelectronic&Communication Engineering,Xiamen University of Technology,Xiamen 361024,China)

机构地区：[1]厦门理工学院电气工程与自动化学院,福建厦门361024 [2]厦门理工学院光电与通信工程学院,福建厦门361024

出　　处：《厦门理工学院学报》2018年第1期31-36,81,共7页Journal of Xiamen University of Technology

基　　金：国家自然科学基金项目(51407151);福建省自然科学基金项目(2015J05113)

摘　　要：针对油纸绝缘变压器内部绝缘介质弛豫响应的复杂性,根据介质响应理论提出建立混联等效电路新模型来表征油纸绝缘弛豫过程。根据混联等效电路的理论分析推导出混联等效电路参数和回复电压的求解公式,利用改进粒子群算法对变压器混联等效电路参数进行辨识,构建能真实反映变压器油纸绝缘状态的等效电路。极化谱求解结果的对比分析表明,相比扩展德拜等效电路,混联等效电路能更准确地反映油纸绝缘变压器的老化情况,且随着变压器绝缘老化加剧,其优越性越明显,可以为变压器油纸绝缘状态的有效诊断提供重要依据。To reduce the complexity of dielectric relaxation response of transformer oil-paper insulation,a novel hybrid equivalent circuit model was established which can reflect the real oil-paper insulation state of transformer.The relaxation process of oil-paper insulation system was characterized based on the dielectric response theory,formulas of the hybrid equivalent circuit parameters and the recovery voltage inferred according to the theory of hybrid equivalent circuit,and parameters of hybrid equivalent circuit identified using improved particle swarm algorithm.Polarization spectrum verifies that the hybrid equivalent circuit can accurately reflect the aging state of the transformer insulation system with the aging of the transformer insulation and this advantage will get stronger when the aging gets aggregated.The hybrid equivalent circuit of oil-paper insulation will therefore be an effective means in the assessment of oil-paper insulation aging.

关 键 词：油纸绝缘 混联等效电路 变压器 参数辨识 介质响应 粒子群算法 

分 类 号：TM411[电气工程—电器] TM855