融合改进差分进化算法的变压器绕组短路累积损伤特征提取与预测

Cumulative damage feature extraction and prediction of transformer winding short circuit based on improved differential evolution algorithm

  • 摘要: 变压器绕组在运行过程中会承受短路电流冲击,导致累积性损伤,严重影响电网安全稳定运行。现有方法在 处理高维非线性特征时存在提取精度不足、预测模型泛化能力弱等问题,为此设计了一种基于改进差分进化算法的 变压器绕组短路累积损伤特征提取与预测方法。在传统差分进化算法中引入了自适应变异策略和精英保留机制,增 强了全局搜索能力,并将改进算法应用于损伤特征的优化提取,实现了关键特征参数的智能衰减,降低了特征维护, 提升了特征表达能力。实验结果表明,所提方法能够有效提取变压器绕组累积损伤的本质特征,且大幅提升了预测 准确率,为变压器的安全稳定运行奠定了基础。

     

    Abstract: The transformer winding withstands the short-circuit force during transformer short-circuit. The transformer windings takes cumulative damage, which seriously affects the safe and stable operation of the power grid. However, previous researches have limitations such as insufficient extraction accuracy and inadequate generalization ability of prediction model when dealing with high-dimensional nonlinear features. Therefore, this paper develops an improved differential evolution algorithm for the extraction and prediction of cumulative damage characteristics of transformer winding short-circuit. In this paper, adaptive mutation strategy and elite reservation mechanism are integrated into the traditional differential evolution algorithm to improve the global search ability, and the improved algorithm is applied to the optimal extraction of damage features, which realizes the intelligent attenuation of key feature parameters, reduces feature maintenance, and improves the ability of feature expression. The experimental results show that the proposed method can effectively extract the essential characteristics of transformer winding cumulative damage, and greatly improve the prediction accuracy, which supports the safe and stable operation of the transformer.

     

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