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If the trip of overload branch may cause cascading tripping in corresponding section, emergency overload control should be executed to ensure the security of the transmission section and maintain its integrality and transmission capacity. A series of improvements against the conventional sensitivity algorithm are proposed, which include the advance of the integrative sensitivity, the use of equal...
An advanced method for improving the sensitivity of the digital differential protection is presented in this paper. The new approach based on adaptive adjustment of the percentage differential protection takes into account the tap position of the power transformer with on-load tap changer. The digital differential protection can be more sensitive to the faults of transformer by reducing the unbalance...
A novel criterion for neutral current differential protection is presented in this paper, which is based on a full research into traditional neutral current differential protection schemes used in transmission lines. Compared to traditional criteria, the novel one is able to increase sensitivity for an internal fault and remain stable for an external fault. Simulation studies show that the sensitivity...
A novel criterion for neutral current differential protection is presented in this paper, which is based on a full research into exist neutral current differential protection schemes used in transmission lines. Compared to traditional ones, the novel criterion can improve the sensitivity under internal fault conditions and improve reliability under external fault conditions. More importantly, the...
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