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Now a days Faults are occurring commonly in the power systems. Superconducting fault current limiter is an eyecatching electronic device to solve the problematic of very high fault current in the power system. In this paper, the performance of enriched system capacity with existing switchgear by superconducting fault current limiter is studied. At first, a resistive type SFCL is modeled in Simulink...
As the growth in comfort of the customers, demand is increasing in day to day electrical operations. At the same way problems related to the power system network due to short circuits also increasing. To overcome the short circuit problems, many devices like DVR and accurate control techniques established, among them the efficient device is Fault Current Limiter (FCL). The FCL reduces the short circuit...
Undetected short circuit faults are a significant problem in power transformers and can eventually develop into catastrophic faults. At present, frequency response analysis (FRA) is one of the well-recognized diagnostic tools for the detection of winding faults, but it has some limitations, such as a low signal-to-noise ratio (SNR) and instability caused by changes in the measuring voltage. In this...
Zone 3 of a distance relay is used to provide backup protection for adjacent transmission lines. Zone 3 is vulnerable to operate during stressed system condition which leads to cascade tripping of transmission lines. Zone 3 decision becomes more effective, if reliable fault pickup information of adjacent line relays is available. Today, substations are being operated remotely from a central location...
In this paper, wavelet transform technique is applied to detect fault in the transmission line with flexible alternating current transmission (FACTS) device. Presence of FACTS device changes the system impedance and hence makes it difficult to detect faults on the line which may result into maloperation of relay. Three phase currents are monitored at both ends of the transmission line using global...
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