Research on Life Prediction Models of HVDC Contactors

doi:10.16628/j.cnki.2095-8188.2025.01.001

Abstract

Abstract:

Higher reliability and longer service life have been the development directions for high voltage DC (HVDC) contactors.An electrical endurance test of an HVDC contactor is carried out.The degradation trends of featured parameters such as pick-up time, release time and arcing time are analyzed.In addition, according to the degradation and failure mechanisms of the contactor, the lifespan prediction models based on the function fitting and autoregression are established using the release time as the featured parameter.By comparing the prediction results, it is concluded that the lifespan prediction model based on autoregression has the best prediction accuracy.

Key words: high voltage DC contactor, degradation and failure mechanism, electrical endurance test, life prediction, autoregression model

CLC Number:

TM572.1

GU Zhihao, WU Chengchuang, ZHANG Chao, HE Yubin, REN Wanbin. Research on Life Prediction Models of HVDC Contactors[J]. LOW VOLTAGE APPARATUS, 2025, 0(1): 1-5.

Figures/Tables 9

References 13

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参数	数值或类型
测试环境温度/℃	20~25
测试环境湿度/%	50~65
负载性质	阻性负载
主触头负载电压/V	270
主触头负载电流/A	250
辅助触头负载电压/V	28
辅助触头负载电流/A	5
动作频率	1 s通/2 s断

模型类别	预测标准偏差/ms
线性回归模型	0.349 226
多项式回归模型	1.120 204
带常数项的幂回归模型	0.975 510
带常数项的指数回归模型	1.176 984
自回归模型	0.323 880

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