Calculation of the Potential Gradient of Twin-Cylindrical Bipolar Conductors with Various Geometrical Parameters

Electric field analysis of hybrid ac/dc transmission lines

“…Extra-highvoltage (EHV) direct current has been increasingly used for the transmission of electrical energy in recent years due to economical and electrical advantages it o!ers over ac (Abu-Seada and Nasser, 1972). One of these advantages is the transmission of larger bulk amounts of electrical power over much longer distances than possible with ac.…”

“…The electrostatic "eld description around ac, dc and hybrid ac/dc transmission lines have been presented in several papers (Abu-Seada and Nasser, 1972;Sarma and Drogi, 1988;Abdel-Salam and El-Mohandes, 1990;Abdel-Sattar, 1986;Ismail and Abu-Gammaz, 1999;Ismail, 1999;Singer et al, 1974). Abu Seada has applied the CSM and the method of images to calculate the potential gradient of twin cylindrical bipolar conductors with various geometrical parameters (Abu Seada and Nasser, 1972).…”

“…Abu Seada has applied the CSM and the method of images to calculate the potential gradient of twin cylindrical bipolar conductors with various geometrical parameters (Abu Seada and Nasser, 1972). Sarma has used the method of successive images for the calculation of electrostatic "eld of a system of parallel cylindrical conductors (Sarma and Janischewskyj, 1969).…”

Computation of electric fields for EHV and UHV transmission lines

“…This made their method complicated to use for the electric field computa tion for bundle conductor transmission line, Abou-Seada and Nasser used the method of charge simulation to calcu late the electric field and potential around a twin-subconductor bundle (20)(21)(22)(23)(24)(25)(26)(27). In this method, the actual charge distribution on each subconductor surface was represented by several fictitious line charges placed inside each subconductor.…”

“…In the design of high voltage transmission lines, the knowledge of the exact electric field at the conductor surface as well as in the interelectrode space is necessary to calculate corona onset voltage, corona loss and the radio interference (3). A considerable amount of research on the problem of the electric field computation for EHV con ductors has been carried out in the last several years (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28). How ever, the problem of the electric field computation for stranded conduc tors as actually used in practice has not been solved.…”