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基于VGG16圖像特征提取和SVM的電能質(zhì)量擾動分類

來源：電工電氣發(fā)布時間：2023-07-27 14:27 瀏覽次數(shù)：339

基于VGG16圖像特征提取和SVM的電能質(zhì)量擾動分類

童占北¹，鐘建偉¹，李禎維²，吳建軍²，李家俊²

(1 湖北民族大學(xué) 智能科學(xué)與工程學(xué)院，湖北恩施 445000；

2 國網(wǎng)湖北省電力有限公司恩施供電公司，湖北恩施 445000)

摘要：針對傳統(tǒng)電能質(zhì)量擾動分類方法需人工選取特征量，易受人為經(jīng)驗干擾的問題，提出一種基于 VGG16 圖像特征提取和支持向量機 (SVM) 結(jié)合的電能質(zhì)量擾動分類方法。通過格拉姆角場 (GAF) 將電能質(zhì)量擾動信號映射到極坐標(biāo)系中，生成格拉姆矩陣，并轉(zhuǎn)換為二維擾動圖像；利用 VGG16 網(wǎng)絡(luò)自動提取圖像特征的特點，將擾動圖像輸入 VGG16 網(wǎng)絡(luò)中進行提??；將提取的特征數(shù)據(jù)作為 SVM 分類器的輸入，并引入十折交叉驗證對SVM 進行訓(xùn)練，以提升分類器的性能，最后對擾動信號進行準(zhǔn)確分類。仿真結(jié)果表明，該方法對于電能質(zhì)量擾動的分類具有較高的準(zhǔn)確率。

關(guān)鍵詞： 電能質(zhì)量；擾動分類；格拉姆角場；VGG16 網(wǎng)絡(luò)；支持向量機；十折交叉驗證

中圖分類號：TM712 文獻標(biāo)識碼：A 文章編號：1007-3175(2023)07-0007-07

Power Quality Disturbance Classification Based on

VGG16 Image Feature Extraction and SVM

TONG Zhan-bei¹, ZHONG Jian-wei¹, LI Zhen-wei², WU Jian-jun², LI Jia-jun²

（1 College of Intelligent Systems Science and Engineering, Hubei Minzu University, Enshi 445000, China;

2 State Grid Hubei Electric Power Co., Ltd. Enshi Power Supply Company, Enshi 445000, China）

Abstract: Traditional power quality disturbance classification methods need to manually select feature quantities, which are susceptible to human experience interference. Hence, the paper proposes a power quality disturbance classification method based on the combination of VGG16 image feature extraction and Support Vector Machine (SVM). It first maps power quality disturbance signals to the polar coordinate system through Gramian Angular Field (GAF) to generate the Gramian matrix which is transformed into a two-dimensional disturbance image. Second, the characteristic of VGG16 network to automatically extract image features is used to input disturbed images into VGG16 network for extraction. Third, the extracted feature data is used as the input of SVM classifier, ten-fold cross-validation is introduced to train SVM to improve the performance of the classifier, and then disturbance signals are classified in an accurate way. The simulation results show that this method has higher accuracy of power quality disturbances classification.

Key words: power quality; disturbance classification; Gramian angular field; VGG16 network; support vector machine; ten-fold cross-validation

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基于VGG16圖像特征提取和SVM的電能質(zhì)量擾動分類