By an analysis of the influence of different compensating schemes on voltage distribution along half-wavelength line

it is hoped that an ideal half-wavelength compensating scheme can be obtained. A conclusion is derived by mathematical derivation process that the line to line circuit and zero-sequence circuit should both be considered in the compensation scheme for complete simulation of the transmission of the three-phase transmission line. The simplified tuned circuit model with zero-sequence compensating is proposed and voltage distribution along the line of natural half-wavelength

tuned half-wavelength with and without zero-sequence compensating is simulated under conditions such as on load

no-load and open-phase running. The voltage distribution along the line without zero-sequence compensating exhibits superposition of line to line circuit and zero-sequence circuit

which is much different from natural half-wavelength. As a result

the tuned circuit with zero-sequence compensating is better able to simulate the characteristics of natural half-wavelength line.