Residual Life Prediction of Low-Voltage Circuit Breaker Thermal Trip Based on the Wiener Process

Xiuping Su (), Linlin Wang, Zhilin Zhang and Dongyue Wang
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Xiuping Su: Provincial and Ministerial Co-Construction Collaborative Innovation Center on Reliability Technology of Electrical Products, Hebei University of Technology, Tianjin 300130, China
Linlin Wang: Provincial and Ministerial Co-Construction Collaborative Innovation Center on Reliability Technology of Electrical Products, Hebei University of Technology, Tianjin 300130, China
Zhilin Zhang: Provincial and Ministerial Co-Construction Collaborative Innovation Center on Reliability Technology of Electrical Products, Hebei University of Technology, Tianjin 300130, China
Dongyue Wang: Provincial and Ministerial Co-Construction Collaborative Innovation Center on Reliability Technology of Electrical Products, Hebei University of Technology, Tianjin 300130, China

Energies, 2024, vol. 17, issue 5, 1-15

Abstract: A low-voltage circuit breaker thermal trip plays a role in power systems, including opening and closing, control, protection, and more. Their reliability directly affects the security and stability of the power distribution system. The Wiener process model is established according to the accelerated degradation data of thermal trips, and remaining life prediction is carried out. In this paper, firstly, the constant stress accelerated degradation test is carried out on a thermal trip with temperature as the accelerated stress and specific thermal deflection as the degradation eigenquantity to characterise the degradation trajectory according to the degradation data and analyse the degradation law; then, it is verified by the test of normal distribution that the degradation data of the thermal trip conform to the Wiener process. The Wiener process, using the great likelihood estimation method to estimate the parameters of the remaining life, calculates the remaining life probability density function and reliability function under different temperature stresses and obtains the remaining life of the thermal trip under each accelerated stress conditions; finally, the remaining life of the thermal trip at the initial moment is taken as the pseudo-failure life, and the Arrhenius accelerated model is utilised to launch the external thermal trip under normal stress. Finally, the Arrhenius acceleration model is used to extrapolate the lifespan of the thermal trip under normal stress.

Keywords: thermal trip; Wiener process; performance degradation; residual life prediction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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