| abstract |
A method for measuring a three-dimensional power frequency electric field based on transmission line equivalent surface charge curve integral. First, relevant parameters for calculating three-dimensional power frequency electric field strength of a transmission line are acquired. Next, a three-dimensional model of an unequal-height suspension transmission line is established based on a line catenary equation, the practical line height at the position of any point of the transmission line within the span is determined, the line equivalent surface charge at the position of any point of the transmission line within the span is further acquired by using unequal-height suspension transmission line equivalent surface charge curve integral, and in the end the spatial electric field strength distribution generated by a multi-line system when the lines at the two ends of the span are unequal in height is calculated according to the field strength superposition principle. The method can truthfully reflect the practical spatial erection condition of a high-voltage transmission line, which facilitates accurate calculation of spatial three-dimensional electric field strength of a high-voltage transmission line, so as to provide a reliable reference for evaluating the electromagnetic environment of a transmission line. |