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A new electromagnetic loop with Voltage Class of 500kv and 220kv are constantly generated when 500kv power network is being constructed in China. Optimizing for the existing layering partition is of great significance to the safety and stably operation of the grid. The short circuit current calculation is crucial to the selection of grid's equipment and scheme for layering partition between electromagnetic...
Complex fault diagnosis is one of the most important areas of power system analysis. Currently the power supply system is complicated, the causal relationship for or logic of general unstick quantitative which determined by the structure exists between the input and output in a Complex fault system. Therefore, the mapping one-to-one simple relationship does not exist between the fault and sign, which...
Distribution line non-communication protection (DNCP) can quickly and selectively isolate unsymmetrical fault, but the performance of this distribution line automation system is not satisfying in the case of symmetrical fault. This paper proposes a scheme which can quickly isolate symmetrical fault and block the operation of BPS: DNCP which is closed to the source can operate instantaneously, that...
A cluster of improved safety indices for the connection models in 10 kV distribution network is raised based on k(n-1+1) safety criterion. These indices apply to describe not only the security of radial connection mode but also ring-type connection mode, such as "N-1" connection, sub-liaison connection, 4??6 connection and so on. Among these indices, the severity index of faults depicts...
To solve the problem of Interline fault of parallel transmission lines, by means of considering the influence of zero sequence mutual inductance of parallel transmission lines a fault location algorithm based on one-terminal electrical data is proposed. Based on the analysis of the relationship of two parallel transmission lines' fault components, the fault location equation for interline fault without...
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