Reducing the Flow Rate of Short Circuit Fault Current at the Output of the High Voltage Power Supply

Zibarzani, Ali | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55587 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Kaboli, Shahriar
  7. Abstract:
  8. In this research, we have presented a method to delay the propagation of fault current in high voltage power supplies. Common protection methods usually protect the load and do not protect the power supply itself well. In this research, our goal was to propose a method to prevent the short circuit fault current from reaching the power supply elements. At first, the available methods to limit the fault current and protect the high voltage power sources were studied and investigated. Then, using the transmission line theory, a ladder filter was designed as an alternative to the normal filter at the output of the power supply. In the next step, using software simulation, the performance of the ladder filter was observed and compared with the normal filter. After confirming the proper performance of the ladder filter in delaying the propagation of the fault current, the actual circuit of the ladder filter was designed and implemented. By doing the laboratory test, the effective performance of the designed filter was designed. The results show that by keeping the filter volume constant and only partionalizing it, it is possible to delay the fault current and at the same time maintain the necessary filtering effect.
  9. Keywords:
  10. High Voltage Power Supply ; Short Circuit Current ; Fault Current Limiter ; Propagation Delay ; Fault Protection ; Asymmetrical Short Circuit Fault

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