Method of long distance UHV tower double white line mutual capacitance measurement method

The present invention discloses a method of capacitance measurement method of long distance cross phase UHV tower double line, a mutual capacitance measurement phase at the same frequency of 50Hz double circuit transmission line tower than two hundred forty kilometers, it is also applicable to short-distance lines a mutual capacitance measurement phase, the first step: to obtain a frequency of 50Hz vertical midpoint of the absolute value of the capacitance value of the phase error at two mutually equal frequencies; the second step: after the mutual capacitance values ​​are added two phases divided by two, to obtain two frequencies spaced mutual capacitance average, the average is spaced at a frequency of 50Hz mutual capacitance. The prior art and the present invention has the following advantages: the present invention changes traditional measurement methods, and consider the impact of the presence of the line capacitance to ground frequency interference in the wiring and algorithms, especially in long-distance transmission line, with the method of the present invention measures the capacitance was out of phase error is reduced to meet the needs of the project.