In order to solve the local overheating problem existing in connector terminal in UHV DC converter station

we constructed a FE model of the terminal connector by analyzing thermoelectricity coupling effect of terminal connector

by which the influence of contact resistance

current strength and structure size on the temperature rise and temperature distribution of terminal connector based on ANSYS can be analyzed.The temperature rise trend of terminal connector was analyzed by using the temperature rise prediction model.The calculation results show that

under the condition of big current

the temperature of splicing of terminal connectors increases exponentially with time and tends to be stable.When the contact resistance of the splicing part of terminal connector increases

the temperature of the part

which rises linearly with the increase of input current

increases correspondingly.The temperature of splicing of terminal connectors increases linearly and nonlinearly with the decrease of section widths and thicknesses.The temperature of splicing of terminal connectors is higher than that of other parts

and graded distribution appears along the current direction.The maximum temperature is located at the middle splicing of terminal connectors

and uniform distribution appears along the transverse direction.