Simulation of surge corona On three-phase transmission lines

Corona in the HV overhead transmission lines is a highly nonlinear and non deterministic phenomenon, it can be an important source of attenuation and distortion of overvoltage surges. This paper presents a mathematical model to predict the capacitive changes at conductor of transmission line due to corona. This model has been incorporated into the Alternative Transients Program version of the Electromagnetic transients program (ATP/EMTP) as a user defined component, using the MODELS interface of this program. The paper discusses the basic aspects of modeling, simulation of transmission lines with corona effect for present the characteristics of any line. The results from the proposed model are compared with experimental investigations in the literature. and also the propagation of surges along overhead transmission lines.