The invention discloses a
resonance grounding
system single phase grounding fault section positioning method utilizing phase
voltage current break variable phase characteristics. The method comprises steps that step 1, a break variable of a phase
voltage and a break variable of a phase current of each
data acquisition device are calculated; step 2, phases of all frequency components of the phase
voltage break variables and the phase current break variables are calculated through utilizing a
matrix pencil algorithm; step 3,
phase angle difference dph (50) of a phase voltage break variable
power frequency component and a phase current break variable
power frequency component of one same acquisition device is acquired; step 4,
phase angle difference dph (fm) of any
high frequency component of the phase voltage break variable and any
high frequency component of the phase current break variable is calculated; step 5, an absolute value dj of the difference of the dph (50) and the dph (fm) is calculated; and step 6, magnitudes of all the dj are determined, and a fault section is identified. The method is advantaged in that zero sequence voltages and currents are not required, the phase voltage and the phase current of each phase are only required, compared with a
resonance grounding
system section positioning method based on the zero sequence voltages and currents, the method has further has properties of autonomy, no need of filtering and easy realization.