| 引用本文: | 郑含博,敬佳兴,罗晓庆,等.基于多源融合的油纸绝缘套管缺陷辨识及绝缘状态评估[J].电力系统保护与控制,2023,51(20):119-128.[点击复制] |
| ZHENG Hanbo,JING Jiaxing,LUO Xiaoqing,et al.Defect identification and insulation condition assessment of an oil-immersed paper insulation bushing based on multi-source fusion[J].Power System Protection and Control,2023,51(20):119-128[点击复制] |
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| 摘要: |
| 油浸纸绝缘套管作为变压器的关键组件，其绝缘受损会威胁变压器主设备的运行安全。针对此现状，提出一种基于多源融合的油纸绝缘套管缺陷辨识及绝缘状态评估方法。首先，根据实际运行工况制备典型缺陷试验套管，并开展频域介电响应、局部放电及红外热成像联合试验，辨识套管缺陷种类。然后，提取套管绝缘指标量，引入隶属度函数及状态得分算子，建立基于博弈论组合赋权法的套管绝缘状态评估模型。最后，分别采用组合赋权法和单一赋权法的评估模型，对正常以及缺陷套管进行算例分析。结果表明：联合试验可以准确辨识套管缺陷种类。组合赋权法弥补了单一赋权法评估结果片面的不足，且正常套管的模型评估分数均高于缺陷套管。评估结果与套管实际绝缘状态一致，验证了套管绝缘状态评估模型的正确性及有效性。 |
| 关键词: 油浸纸绝缘套管 典型缺陷模拟 频域介电特性 局部放电 状态评估 |
| DOI：10.19783/j.cnki.pspc.230261 |
| 投稿时间：2023-03-12修订日期：2023-06-28 |
| 基金项目:国家自然科学基金项目资助(52277139，52367014)；广西科技基地和人才专项科技项目资助(2020AC19010) |
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| Defect identification and insulation condition assessment of an oil-immersed paper insulation bushing based on multi-source fusion |
| ZHENG Hanbo1,JING Jiaxing1,LUO Xiaoqing2,LIU Taiwei2,LI Yihang1 |
| (1. Guangxi Key Laboratory of Power System Optimization and Energy Saving Technology (Guangxi University),
Nanning 530004, China; 2. State Key Laboratory of Power Grid Environmental Protection,
China Electric Power Research Institute, Wuhan 430074, China) |
| Abstract: |
| As a key component of transformers, oil-immersed paper insulation bushing can pose a threat to the operational safety of the transformer's main equipment if their insulation is damaged. The paper proposes a method for defect identification and insulation condition assessment of an oil-immersed paper insulation bushing based on multi-source fusion. First, typical defect test bushings are made. Then the types of bushing defects are identified by frequency domain dielectric response, partial discharge, and infrared thermal imaging related joint testing. Then the insulation index of the bushing is extracted and the membership function and state score operator are introduced. The evaluation model of bushing insulation state based on game theory combined weighting method is established. Finally, evaluation models using the combination and single weighting methods are used for example analysis of normal and defective bushings. The results show that joint testing can accurately identify the types of casing defects. The method avoids the problem of one-sided evaluation results using a single weighting method. The evaluation scores of normal bushings are higher than those of defective bushings. The correctness and effectiveness of the bushing insulation state evaluation model are verified. |
| Key words: oil-immersed paper insulation bushing simulation of typical defect frequency dielectric properties partial discharge condition assessment |
