Current-transformer-saturation-influence-resistant traveling-wave differential protection method for currents of non-loss line
A current transformer and line current technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of prolonging the fault occurrence time, failing to meet the quick action of relay protection, and large data window
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[0021] The technical solution of the present invention will be further described in detail according to the accompanying drawings.
[0022] figure 1 It is a schematic diagram of the line transmission system applying the present invention. In this embodiment, the protection device first collects the three-phase voltage traveling wave component u mA (t), u mB (t), u mC (t), three-phase current traveling wave component i mA (t), i mB (t), i mC (t); collect the three-phase voltage traveling wave components u nA (t), u nB (t), u nC (t), three-phase current traveling wave component i nA (t), i nB (t), i nC (t); where t is any sampling time.
[0023] The protection device uses phase-mode conversion to convert the three-phase voltage traveling wave components of the transmission line at each sampling time t at the protective installation of the substation m into the 0, α, and β mode voltage traveling wave components u of the transmission line at the protective installation...
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