A Study on Frequency-Dependent Parameters and Sunde's Formulas of a Counterpoise (特集:平成18年〔電気学会〕電力・エネルギー部門大会) A Study on Frequency-Dependent Parameters and Sunde's Formulas of a Counterpoise
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This paper investigates frequency-dependent parameters of a counterpoise which are identified from measured voltages and currents by a numerical optimization technique. Based on the investigation, the frequency characteristics of the impedance and the admittance are made clear. Then, Sunde's formulas of the frequency-dependent impedance and admittance, which are not widely used because of requiring iterative calculations to determine the final values, are compared with the measured results. It appears that Sunde's iterative formulas show a similar trend to the frequency-dependent parameters identified from the measured results, and can be adopted in a frequency lower than 100kHz. However above the frequency, the formula is case sensitive and is not reliable.
- IEEJ Transactions on Power and Energy
IEEJ Transactions on Power and Energy 127(1), 299-306, 2007-01-01
The Institute of Electrical Engineers of Japan