典型电极短空气间隙的击穿电压混合预测  

Hybrid Prediction of the Breakdown Voltages of Short Air Gaps with Typical Electrodes

作　　者：邱志斌[1] 阮江军[1] 徐闻婕 黄从鹏 廖一帆 QIU Zhibin;RUAN Jiangjun;XU Wenjie;HUANG Congpeng;LIAO Yifan(School of Electrical Engineering, Wuhan University, Wuhan 430072, China;Electric Power Research Institute, China Southern Power Grid, Guangzhou 510080, China)

机构地区：[1]武汉大学电气工程学院,武汉430072 [2]南方电网科学研究院有限责任公司,广州510080

出　　处：《高电压技术》2018年第6期2012-2018,共7页High Voltage Engineering

基　　金：特高压工程技术(昆明、广州)国家工程实验室开放基金(NEL201509);中国博士后科学基金(2016M602354);中央高校基本科研业务费专项资金(2042017kf1009,2042018 kf0020)~~

摘　　要：空气间隙的击穿电压与放电起始之前的电场特征存在多维非线性关系。采用支持向量分类机（support vector classifier,SVC）建立了预测模型,以28个电场特征量作为SVC的输入,以间隙在加载电压下耐受（-1）或击穿（1）作为SVC的输出,基于正交设计原理选取9个样本对SVC模型进行训练,成功实现了球隙、棒–板和棒–棒短空气间隙的工频击穿电压混合预测,72个测试样本预测结果的平均绝对百分比误差仅为2.39%;对球–板、棒–球和大球–小球间隙的击穿电压分别进行预测,预测值与试验值基本相符,平均绝对百分比误差分别为1.75%、2.78%和4.57%,验证了该预测方法的有效性和泛化性能。There is a multidimensional nonlinear relationship between the breakdown voltage of air gap and the electric field features before discharge inception. We established a prediction model by support vector classifier（SVC）. Taking 28 electric field features as the input of the SVC, and the output parameters as-1 and 1, respectively,we characterized whether the gap would withstand or breakdown under an applied voltage.Selecting 9 samples by the orthogonal design principle,we used the samples to train the SVC model.The hybrid prediction of the power frequency breakdown voltages of short air gaps including sphere-sphere, rod-plane and rod-rod geometries was successfully realized. The mean absolute percentage error（MAPE） of the predicted results of 72 test samples is only 2.39%. The power frequency breakdown voltages of sphere-plane, rod-sphere and big sphere-small sphere gaps were predicted. The predicted results are basically in accordance with the experimental values and the MAPEs are respectively 1.75%, 2.78%, and 4.57%, which verifies the validity and generalization performance of the prediction method.

关 键 词：空气间隙 工频击穿电压 支持向量分类机 正交设计 电场特征量 典型电极 

分 类 号：TM85[电气工程—高电压与绝缘技术]