Lossy electric transmission line current traveling-wave differential protection method
A transmission line and differential protection technology, which is applied in the direction of automatic disconnection emergency protection devices, circuit devices, emergency protection circuit devices, etc., can solve the problem of prolonging the time, failing to meet the requirements of quick action of relay protection, and large data window And other issues
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[0023] The technical solution of the present invention will be further described in detail according to the accompanying drawings.
[0024] figure 1 It is a flowchart of a current traveling wave differential protection method for a lossy transmission line applying the method of the present invention. This embodiment first collects the three-phase voltage traveling wave component and the three-phase current traveling wave component of the transmission line at each t sampling time at the protection installation place of m substation; Voltage traveling wave component and three-phase current traveling wave component.
[0025] The phase-mode transformation is used to convert the three-phase voltage traveling wave component and the three-phase current traveling wave component at each t sampling time at the m substation protection installation into the 0, α, β mode voltage traveling wave component u at each t sampling time m0 (t), u mα (t), u mβ (t) and the 0, α, β mode current t...
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