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The work reported in this paper demonstrates the use of Real Time Digital Simulator (RTDS) for testing of differential relay operation in the protection scheme for power transformer. The RTDS simulator enables real-time calculation of the electromagnetic phenomena with the calculation time step of even 50μs. The hardware enables import and export of many signals from the simulator to an external actual...
Dispersed generation (DG) sources are rapidly opening their way to the power systems. Despite the many advantages that their introduction into the grid has, it may cause some problems. One of the problems is increasing the short-circuit current and the loss of protective devices coordination. To deal with this problem, many different approaches have been proposed. One of the best promising approaches...
This paper, proposes a new traveling wave-based fault location method for power transmission grids. This proposed method involves two stages: offline and online. At the offline stage, first, the transmission network is represented as a weighted graph and the shortest paths between each pair of sensors are determined. Then, the graph lines which are not located on the shortest paths are divided into...
The Frequency Response Analysis (FRA) test has been recognized as one of the sensitive tools available for detecting electrical and mechanical faults inside power transformers. However, there is still no universally systematic interpretation technique for these tests. Many research efforts have employed different statistical criteria in order to aid the interpretative capability of the FRA, but it...
Applying FCLs in power system lead to suppress short-circuit level and burden of CBs. Alongside with their astounding advantages; it is possible that the FCLs have destructive effects on interrupting characteristics of CBs such as TRV characteristics. Among various topologies introduced for FCLs, Resonance type SFCL affects incredibly on TRV characteristics and causes severe interrupting conditions...
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