系统仿真学报 ›› 2018, Vol. 30 ›› Issue (5): 1657-1664.doi: 10.16182/j.issn1004731x.joss.201805005

• 仿真建模理论与方法 • 上一篇    下一篇

相对变换KPCA的变压器油击穿电压预测建模

熊印国   

  1. 宜春学院物理科学与工程技术学院,江西 宜春 336000
  • 收稿日期:2016-06-01 修回日期:2016-08-12 出版日期:2018-05-08 发布日期:2019-01-03
  • 作者简介:熊印国(1974-),男,江西丰城,硕士,讲师,研究方向为复杂工业过程建模,故障诊断等。
  • 基金资助:
    国家自然科学基金(51366013)

Prediction Model for Breakdown Voltage of Transformer Oil Based on Relative Transformation and Kernel Principal Component Analysis

Xiong Yinguo   

  1. School of Physical Science and Engineering, Yichun University, Yichun 336000, China
  • Received:2016-06-01 Revised:2016-08-12 Online:2018-05-08 Published:2019-01-03

摘要: 针对变压器油击穿电压的在线测量问题,提出基于相对变换(RT)核主元分析(KPCA)的变压器油击穿电压预测建模方法分析与击穿电压关联密切的因素,通过相对变换将原始数据空间变换到相对空间,提高数据之间的可区分性;利用KPCA对相对空间进行特征提取,达到降低数据维数、滤除数据噪声、提取数据非线性特征的目的;将KPCA提取的主元变量作为核极限学习机(KELM)的输入,建立变压器油击穿电压预测模型并采用差分进化算法优化模型参数。与RTKPCA最小二乘支持向量机(LSSVM)、RTPCA-KELM和RTPCA-LSSVM方法进行比较,实验结果表明所提出的方法具有良好的预测精度和泛化能力。

关键词: 击穿电压, 相对变换, 核主元分析, 核极限学习机, 差分进化

Abstract: Aiming at the difficulty of measuring the breakdown voltage of transformer oil on line, a new prediction model for breakdown voltage of transformer oil is proposed based on relative transformation (RT) and kernel principal component analysis (KPCA). By analyzing the factors that are closely related to the breakdown voltage, the original data space is converted to the relative data space by relative transformation to improve the distinguishability between data. KPCA is employed in the relative space for the purpose of data dimension reduction, denoising and extracting nonlinear features. Kernel principal components extracted by KPCA are used as the input of kernel extreme learning machine (KELM) to establish the prediction model for breakdown voltage of transformer oil, and the parameters of prediction model are optimized by differential evolution algorithm. Compared with RTKPCA-LSSVM, RTPCA-KELM and RTPCA-LSSVM, the simulation results illustrate that the proposed prediction method has better prediction precision and generalization ability.

Key words: breakdown voltage, relative transformation, kernel principal component analysis, kernel extreme learning machine, differential evolution algorithm

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