Current Traveling Wave Differential Protection Method for Lossy Transmission Lines Against Effects of Current Transformer Saturation
A technology of current transformers and transmission lines, which is applied in the direction of emergency protection circuit devices and electrical components, and can solve problems such as the inability to meet the quick action of relay protection, large data windows, and prolonging the time of fault occurrence.
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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 1It 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 and the three-phase current traveling wave component at each sampling moment of the transmission line at the protection installation place of the m substation; Phase voltage traveling wave components and three-phase current traveling wave components.
[0023] The protection device uses phase-mode transformation to convert the three-phase voltage traveling wave components and three-phase current traveling wave components at each sampling time of the protection installation of m substation into the 0, α, β mode voltage traveling wave components and 0, α, β mode current traveling wave components.
[0024] The protection device uses phase-m...
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