Economics of Single and Bundle Conductors for Extra-High-Voltage Transmission

1. A method has been developed whereby the optimum configuration and conductor area may be determined for a given EHV transmission line, taking into account all the parameters which have economic significance. 2. This method is general, and applicable to a wide range of system configurations, transmission distances, voltages, and loadings per circuit. Economic evalution factors may be varied to agree with available cost data, and the judgment and policies of the utility management. 3. This method is embodied into a digital computer program for the IBM705 computer, providing rapid computation of any case to be investigated. 4. Fifty-eight different cases were investigated in this study, to determine the effect of varying the system parameters and the economic evaluation factors over a wide range of values which are of practical interest for the United States and Canada. 5. Annual cost differentials between the minimum cost points for the various configurations are considerable and correspond to several per cent of the annual charges on the line investment. 6. The optimum configuration depends upon the particular values of the system parameters and economic evaluation factors. Therefore it is difficult to draw over-all conclusions, valid for all cases. Rather, each specific case will have to be investigated separately according to the method described in this paper. 7. In general, as the load per circuit increases, relative to surge impedance loading, the number of conductors per phase corresponding to the optimum configuration also increases. 8.

[1]  Percy H. Thomas.  Output and regulation in long-distance lines , 1909, Proceedings of the American Institute of Electrical Engineers.

[2]  Percy H. Thomas.  Calculation of the high-tension line , 1909, Proceedings of the American Institute of Electrical Engineers.

[3]  O. Nigol,et al.  Corona Loss Research at Ontario Hydro Coldwater Project , 1961, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[4]  P. A. Abetti,et al.  Progress in Extra-High-Voltage Power Transmission , 1959, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[5]  Edith Clarke,et al.  Three phase multiple conductor circuits , 1932, Electrical Engineering.

[6]  P. A. Abetti.  Project EHV , 1958, Electrical Engineering.

[7]  Bradley Cozzens,et al.  Corona Loss Measurements for the Design of Transmission Lines to Operate at Voltages Between 220 Kv. and 330 Kv. , 1933, Transactions of the American Institute of Electrical Engineers.

[8]  P. A. Abetti,et al.  Bibliography on extra-high-voltage systems , 1958 .

[9]  G. E. Adams.  Radio Interference from High-Voltage Transmission Lines as Influenced by the Line Design , 1958, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[10]  A. J. Wood,et al.  Conductor Economics on High-Voltage Transmission Systems , 1957, Transactions of the American Institute of Electrical Engineers Part III Power Apparatus and Systems.

[11]  P. A. Abetti,et al.  Project EHV 650-Kv Substations , 1961, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[12]  T. W. Liao,et al.  Radio Influence Voltages Caused by Surface Imperfections on Single and Bundle Conductors , 1959, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[13]  H. B. Dwisht,et al.  Double conductors for transmission lines , 1932, Electrical Engineering.