Multiple-track direct-supply traction network fault location method
A technology of fault distance measurement and traction network, applied in the direction of fault location, information technology support system, etc., can solve problems such as uneven distribution of line parameters, achieve low cost, simple implementation, and accurate distance measurement
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[0025] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0026] Schematic diagram of the failure of the double-line direct supply traction network figure 1 shown. In the figure, 1QF and 2QF represent the feeder circuit breakers of the substation's upstream and downstream lines, and 3QF represents the circuit breaker of the substation.
[0027] When the fault occurs at point k, along I 1 The voltage drop of the circuit from the busbar of the substation to the fault point is:
[0028] U=I 1 Z x +I 2 z 12 L x +(I 1 +I 2 )R g (1)
[0029] In the formula: U is the voltage of the busbar of the substation to the ground; z is the unit self-impedance of the line to the ground; z 12 is the unit mutual impedance between uplink and downlink; L x is the fault distance from 1QF to the fault point; L is the length of the power supply arm; R g is the fault point to ground transition resistance.
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