The switching impulse discharge characteristics of rod-plane gaps are widely recognized as one of the key fundamentals underpinning the external insulation design of ultra-high voltage (UHV) systems, serving as critical guidance for UHV engineering insulation design. Utilizing 360 sets of experimental data collected under varying altitudes and meteorological conditions, an eXtreme gradient boosting (XGBoost) prediction model was developed for the positive-polarity switching impulse discharge voltage of rod-plane gaps, with gap distance, air pressure, dry-bulb temperature, and absolute humidity selected as feature parameters. The test results demonstrated that an average relative error of 3.41% is achieved by the XGBoost model when comparing predicted voltage with experimental results on the test set, indicating superior predictive performance relative to other commonly used intelligent prediction methods. Notably, higher accuracy is observed under extremely cold conditions and short gap distances (≤1.5 m). Furthermore, the applicability of existing engineering methods is evaluated based on the predictions, which confirmed that greater adaptability is exhibited by the XGBoost algorithm in addressing discharge voltage prediction under complex environmental conditions.
YAO Xiu-yuan, LI Jia-hao, SU Yu, SUN Dong-xu, ZHAO Xi-lin, CHEN Jing-hao, CHEN Yu-hui.
Intelligent Prediction of Rod-plane Gap Discharge Voltage Based on XGBoost[J].
Science Technology and Engineering, 2026, 26(17): 7317-7323 DOI:10.12404/j.issn.1671-1815.2504022
HanXiancai, SunXin, ChenHaibo, et al. The overview of development of UHV AC transmission technology in China[J]. Proceedings of the CSEE, 2020, 40(14): 4371-4386.
ZengRong, ZhuangChijie, YuZhanqing, et al. Challenges and achievement in long air gap discharge research[J]. High Voltage Engineering, 2014, 40(10): 2945-2955.
GuChen, ZhangWenliang, FanJianbin, et al. Altitude correction of switching impulse flashover voltage of rod-plane air gap[J]. High Voltage Engineering, 2012, 38(1): 140-146.
[7]
International Electrotechnical Commission.High-voltage test techniques-part 1: general definitions and test requirements: IEC 60060-1[S]. Edition 3.0.Geneva:IEC, 2010.
[8]
PiginiA, SartorioG, MorenoM, et al. Influence of air density on the impulse strength of external insulation[J]. IEEE Transactions on Power Apparatus and Systems, 1985, 104(10): 2888-2900.
YuanYao, JiangXingliang, DuYong, et al. Predictions of the AC discharge voltage of short rod-plane air gap under rain conditions with the application of ANN[J]. Journal of High Voltage Engineering, 2012, 38(1): 102-108.
DingYujian, YaoXiuyuan, GeXing, et al. Calculation and analysis of switching impulse voltage of DC tower gap based on AdaBoost-SVR forecast[J]. Proceedings of the CSEE, 2021, 41(11): 3962-3970.
LuoXin, NiuHaiqing, LinHaoran, et al. Application and contrast analysis of BP and RBF neural network in prediction of breakdown voltage of air gap[J]. Advanced Technology of Electrical Engineering and Energy, 2013, 32(3): 110-115.
DingYujian, LiQingfeng, LiaoWeiming, et al. Switching impulse discharge characteristics and altitude corrections for typical long air gaps at high altitude areas[J]. High Voltage Engineering, 2013, 39(6): 1441-1446.
DingYujian, LiaoYuming, SunZhaoying, et al. Experimental studies on impulse flashover characteristics of tower head air gaps of ±1 000 kV DC transmission lines and altitude correction methods[J]. Proceedings of the CSEE, 2011, 31(34): 156-162.
DingYujian, LüFangcheng, LiPeng, et al. Discharge characteristics of ±1 100 kV UHV DC tower air gaps[J]. Power System Technology, 2018, 42(4): 1032-1038.
GengJianghai, ZhangBoyu, WangPing, et al. Study on the correlation of long and short gap streamer discharge under positive switching impulse voltage[J]. Science Technology and Engineering, 2021, 21(18): 7558-7563
ZhangZhongyuan, LiXingchen, MaXudong, et al. Influence of sand and dust environment in high altitude area on impulse discharge characteristics of typical long gap operation[J]. Science Technology and Engineering, 2021, 21(11): 4478-4485.
YangYaqi, LiWeiguo, XiaYu, et al. Research on effects of low pressure condition on ac discharge characteristics of rod-plane gap[J]. Science Technology and Engineering, 2017, 17(16): 220-224.
GuoXianshan, DingYujian, YaoXiuyuan, et al. Flashover characteristics of sphere-plane gap and distance selection for ±1 100 kV UHVDC converter stations[J]. Proceedings of the CSEE, 2020, 40(11): 3701-3710.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, Standardization Administration of the People’s Republic of China.High-voltage test techniques-part 1: definitions and test requirements: GB/Tgeneral16927. 1-2011[S]. Beijing: Standards Press of China, 2012.
[35]
MengQ. LightGBM: a highly efficient gradient boosting decision tree[C]// Proceedings of the 31st International Conference on Neural Information Processing Systems. Long Beach: ACM, 2017: 3149-3157.
[36]
DingY J, YaoX Y, GeX, et al. Calculation and analysis of DC tower gap operating impulse voltage prediction based on AdaBoost-SVR[J]. Proceedings of the CSEE, 2021, 41(11): 3962-3970.
LüFangcheng, QinYuchen, WangPing, et al. Variation law of spatial electric field during the development of streamer under positive switching impulse voltage[J]. High Voltage Engineering, 2019, 45(9): 2964-2970.
GengYinan, CengRong, HeJinliang, et al. Electric field measurements of 1m rod-plane gap discharge under lightning impulse voltage[J]. Proceedings of the CSEE, 2011, 31(4): 130-136.
YangYaqi, LiWeiguo, XiaYu, et al. Research of development mechanism of long gap AC discharge plasma at 4 kPa[J]. Science Technology and Engineering, 2017, 17(3): 223-226.