Global ETD Search
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Showing 1 to 7 of 7 for “"Unbalanced Conditions"”.
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Power Quality and Unbalanced Conditions Assessment Based on Digital Fault Recorders
With the rapid development of power systems, more and more smart devices are installed in power industries, and each of them is gathering tons of information every day.Due to the data explosion and the difficulty of processing these data, data visualization, a big data technology, has become a …
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A protection scheme for alternator fields
… by negative-phase-sequence currents due to unbalanced conditions. Readings were taken of the times required for operation of the relay for various conditions of unbalance. Statistical studies were made to enable time predictions to be offered. It was concluded that the scheme offers the …
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Phase control of delta-connected single-phase grid-forming inverters for auxiliary signal injection
… to benchmark the behavior of the LQI controller. Unbalanced operation is also desirable when supplying an unbalanced load or injecting auxiliary signals for fault detection. Both MATLAB and Controller Hardware in-the-loop (C-HIL) are used to validate the proposed controllers and demonstrate …
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Saturation Effects in 3p3L Power Transformers due to Geomagnetically Induced Currents
… 3p3L transformer while simulating realistic unbalanced conditions. To ensure a valid test protocol, the transformer was designed as a scaled-down model of a power transformer with a core constructed using four step-lap mitred joints and a high quality electrical steel. This was to closely …
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Induction motor variable speed drive performance and impact on energy savings
… simulation predictions. Furthermore, tests under unbalanced and overvoltage conditions were performed and the results verified with simulations. This proves that the developed PSpice model can reliably simulate the actual test bed for both balanced and unbalanced conditions. Moreover, it can be …
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The impact of voltage unbalance and regulation on the life expectancy of LV induction machines
… utilities can lead to them being operated under unbalanced voltage conditions. Power utilities experience voltage unbalances and voltage dips when they provide services to end users. In South Africa ESKOM is the primary power utility, it has a license agreement with NERSA stipulating the …