基于区间灰数动态灰靶的变压器状态评估
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TM407

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国家自然科学基金(51777119); 国网浙江省电力有限公司科技项目(2017HZJTKJ03)


A condition assessment method of transformers based upon the dynamic grey target with the interval grey number
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    摘要:

    针对目前变压器状态评估缺乏考虑多阶段信息的动态性、变化趋势的现状,提出一种基于区间灰数动态灰靶的变压器状态评估方法。首先,对效益型和成本型指标数据进行归一化处理;其次,引入区间灰数的方差和均差来衡量区间指标数据的波动性,进而赋予指标最佳权重;然后,综合考虑变压器多维时间阶段信息集结和指标的阶段间动态变化,提出一种基于区间灰数动态灰靶的变压器状态评估方法,求取靶心度作为状态评估的依据;最后,通过算例分析某变电站多台变压器多阶段的运行数据,验证了该状态评估方法的客观性和有效性。

    Abstract:

    Nowadays, the condition assessment of transformer doesn't consider the dynamic characteristics and variational tendency of information in different stages. On this background, a dynamic gray target assessment model based on approaching degrees is proposed in this paper. First of all, the index data of benefittype and costtype are standardized. Secondly, the variance and the mean deviation of the interval grey number are introduced to evaluate the data volatility of the interval index. Then, the best weight can be determined. After that, a dynamic grey target evaluation model of interval grey number is proposed considering the accumulation of transformer phase information and the dynamic variation of index. The approaching degree is regarded as the basis of condition assessment. At last, the multistage operation data of multiple transformers in a substation is analyzed to verify the validity of the proposed method.

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周敬嵩,俞京锋,杨欢红,朱斌泉,丁宇涛,王 洁.基于区间灰数动态灰靶的变压器状态评估[J].电力科学与技术学报,2020,35(4):133-140. ZHOU Jingsong, YU Jingfeng, YANG Huanhong, ZHU Binquan, DING Yutao, WANG Jie. A condition assessment method of transformers based upon the dynamic grey target with the interval grey number[J]. JOURNAL OF EIECTRIC POWER SCIENCE AND TECHNOLOGY,2020,35(4):133-140.

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  • 在线发布日期: 2020-09-04
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