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Modular Multilevel Converter (MMC) technology is rapidly evolving, and research is ongoing to make the MMC suitable for more applications. This topology comprises multiple Sub-Modules (SM) to form the output voltage levels with lower order harmonic contributions. In this paper, a reconfiguration control method for continuous operation during bypassed faulty SM is presented. The method accomplish to...
In this paper the transistor open-circuit fault diagnostic technique that is based on the grid current prediction in the voltage oriented controlled three-phase two-level rectifier was discussed. For the current one-step prediction, the rectifier's dynamics equation was discretized using the Euler's method. The proposed technique allows to detect single and multiple transistor faults under the rectifying...
Inter-turn insulation failure in induction motor results in complete or developing winding short circuit. Stator winding fault leads to an unbalance in the three phases of the motor leading to a faulty induction motor with increased time and space harmonics of flux. This can lead to uneven distribution of air gap flux and increase in torque ripple. The condition is worsened due to an unbalance in...
Power system restructuring includes several new aspects in power system, especially in the area of transmission line protection. Therefore, in this paper transmission line protection (TLP) using distance relay and modelling of distance relay with analog antialiasing filter for TLP is presented, on the basis of several points of operational aspects, throughout the last decade. Protection system of...
Logic Selectivity immensely reduces both number of outages and their duration in the distribution network. IEC 61850 can be applied for standard implementing of Logic Selectivity in which Generic Object Oriented Substation Events (GOOSE) messages should be exchanged between intelligent field devices over the Internet. However, information security and automation requirements must be noted in order...
This paper provides an open switch fault diagnosis method for a voltage oriented controlled AC/DC line side converter. The technique is based on rectifier phase voltage errors calculations. For the faulted transistors localization, the average voltage errors of the rectifier are computed and their values and signs are analyzed. The proposed method is valid under the rectifier as well as the regenerative...
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