Analysis and calculation of temperature rise of HVDC deep-well earth electrode

Deep-well earth electrode has advantages of covering small area and investing few. Temperature rise is one of the key quantity to take into consideration during designing. After analyzing the current and temperature field, infinite length cylinder model is used to calculate the temperature, and the partial differential equation is deduced to express the temperature field. Uniform space temperature is chosen as initial condition, while lower and upper boundary conditions are thermal insulating and constant temperature separately. An example result is gotten through solving the equation. The characteristics and the reason leading them are analyzed.