Fault distance-finding method for nonuniform zero sequence mutual inductance same-lever aerial multi-back line
A technology of zero-sequence mutual inductance and fault location, which is applied to fault locations, emergency protection circuit devices, electrical components, etc., and can solve the problems that the fault location method is no longer applicable
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[0034] The technical solution of the present invention will be further described in detail according to the accompanying drawings in the specification.
[0035] The invention discloses a method for fault distance measurement (location) aiming at uniform and non-uniform zero-sequence mutual inductance and multi-circuit lines (including double-circuit lines) erected on the same pole with different voltage levels or in the same transmission corridor. The method is based on distribution parameters Model, fault location (localization) method using voltage and current samples sampled simultaneously at both ends. figure 1 Shown is the circuit model of a single-circuit uniform transmission line, where R0 represents the resistance per unit length (Ω / km), L0 represents the inductance per unit length (H / km), and G0 represents the conductance between wires per unit length (S / km ), C0 represents the conductance (F / km) between wires per unit length. Then the voltage-current equation of a ...
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