| 引用本文: | 孙鹏,黄绪勇,耿苏杰,王秀利.基于实时监测和例行试验数据的电力变压器状态动态评估方法[J].电力自动化设备,2018,(3): |
| SUN Peng,HUANG Xuyong,GENG Sujie,WANG Xiuli.Dynamic assessment of power transformer status based on real-time monitoring and experimental data[J].Electric Power Automation Equipment,2018,(3): |
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| 摘要: |
| 考虑到实时监测和例行试验数据反映变压器当前状态的差异性和互补性，提出了一种电力变压器状态动态评估方法。在构建动态评估指标体系的基础上，提出了具有时效特征的单项状态量评分函数；同时基于历史实例样本和变压器状态实时评估时间，提出了融合关联规则置信度与时变参数的单项状态量权重计算方法。针对综合状态指标劣化不均衡问题，引入变权重公式调整权重系数。外样本实例计算结果表明所提方法的正确率达92.1%。 |
| 关键词: 电力变压器 状态评估 实时动态评估 数据时效性 关联规则 变权重 |
| DOI：10.16081/j.issn.1006-6047.2018.03.029 |
| 分类号:TM407 |
| 基金项目:国家自然科学基金资助项目(71571101) |
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| Dynamic assessment of power transformer status based on real-time monitoring and experimental data |
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SUN Peng1, HUANG Xuyong1, GENG Sujie2, WANG Xiuli2
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1.Electric Power Research Institute, Yunnan Power Grid Company Limited, Kunming 650217, China;2.School of Economics and Management, Nanjing University of Science and Technology, Nanjing 210094, China
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| Abstract: |
| Considering the difference and complementarity between reflecting the current status of power transformers through on-line monitoring and preventive test data, a dynamic assessment method of power transformer status is proposed. Based on a dynamic index evaluation system, the timeliness-based score function is presented for each status variable. Meanwhile, based on the history samples and dynamic assessment time, the weights of the score functions are calculated by the combination of confidence of association rules and time-varying parameters. The weight varying formulas are introduced to balance the uneven degradation levels of comprehensive status indices. Results of experimental data show that the correct rate of the proposed method is 92.1%. |
| Key words: power transformers status assessment dynamic status assessment data timeliness association rule varying weight |
