A Fault Location Method Based on Single-Ended Electrical Quantity Not Influenced by Transition Resistance
A technology of fault location and transition resistance, which is applied to fault location, measurement of electrical variables, and fault detection by conductor type, etc. It can solve the problems of fault point transition resistance, error in distance measurement results, and multi-data transmission.
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[0035] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0036] A dual power supply system for the fault location method is attached figure 1 shown in the figure are the equivalent potentials of the system at both ends, Z r , Z s are the equivalent impedances of the system at both ends, respectively. according to figure 1 The analysis model of the fault location method shown is used for fault analysis, assuming that in figure 1 A longitudinal short-circuit fault occurs at point F in the middle, and p is the end of the distance protection setting range, and the expression of the measured voltage at the protection installation on the m side of the line head end after the fault is obtained as shown in the figure:
[0037]
[0038] In the formula Respectively, the measured voltage and measured current at the protective installation on the m side o...
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