comparison of fault currents in ac dc microgrids
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Comparison of Fault Currents in AC & DC Microgrids Mahdi - PowerPoint PPT Presentation

Aug 28, 2023 •659 likes •779 views

Comparison of Fault Currents in AC & DC Microgrids Mahdi Izadkhast Learning Objectives How is the fault current calculated in an AC microgrid? Which elements are contributing to the DC fault current of a DC microgrid?

  1. Comparison of Fault Currents in AC & DC Microgrids Mahdi Izadkhast

  2. Learning Objectives • How is the fault current calculated in an AC microgrid? • Which elements are contributing to the DC fault current of a DC microgrid? • What are the differences of the fault currents in AC and DC microgrids?

  3. AC Fault Current 𝑆 2 + 𝜕𝑀 2 𝑎 = 𝜄 = tan −1 𝜕𝑀 𝑆 𝑈 = 𝑀 𝑆 𝑊 = 𝑆𝑗 𝑔 + 𝑀 𝑒𝑗 𝑔 𝑒𝑢 𝑊 𝑊 = 𝑊 𝑛 ∙ sin(𝜕𝑢 + 𝛽)

  4. AC Fault Current 𝑗 𝑔 = 𝑊 sin(𝜕𝑢 + 𝛽 − 𝜄) − 𝑓 −𝑢 𝑛 𝑈 sin(𝛽 − 𝜄) 𝑎

  5. Fault on DC Link

  6. DC Fault Current by AC Grid

  7. DC Fault Current by Capacitor

  8. DC Fault Current by Inductor

  9. Overall DC Fault Current 𝑗 𝑔,𝑒𝑑 = 𝐽 𝐻 + 𝐽 𝐷 + 𝐽 𝑀

  10. Summary

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