حفاظت فوق سریع باس‌بار مبتنی بر تبدیل آنلاین زمان-زمان

نوع مقاله: پژوهشی

نویسندگان

دانشگاه علم و صنعت ایران

چکیده

در این مقاله روش جدیدی برای حفاظت باس­بار با سرعت فوق العاده سریع ارائه شده است. در این روش با اعمال تبدیل آنلاینTT به مولفه­ های تحمیلی سیگنال­های جریان ثانویه ترانسفورماتورهای جریان پست، مولفه­ های فرکانس بالای ایجاد شده توسط خطا استخراج می­شوند و سپس با استفاده از الگوریتم ساده پیشنهادی برای پردازش خروجی­های تبدیل آنلاینTT  حفاظت باس­بار انجام می­شود. به منظور ارزیابی عملکرد الگوریتم پیشنهاد شده، مدل واقعی پست 400 کیلو ولت در نرم افزار EMTP/ATP-Draw   شبیه­ سازی شده است که نتایج آن در حالات مختلف نشان می دهد که الگوریتم پیشنهادی دارای حساسیت و قابلیت اتکا بالا در تفکیک خطاهای خارجی از داخلی به همراه سرعت عملکرد فوق العاده سریع  است.

کلیدواژه‌ها


عنوان مقاله [English]

Ultra-Fast Busbar Protection by Applying TT-transform on Superimposed Current Signals

نویسندگان [English]

  • Mahmood Lashgari
  • S. Mohammad Shahrtash
چکیده [English]

In this paper a new method for busbar protection is presented. In this method high frequency components generated by faults in current signals at the outputs of current transformers of substations are extracted by applying TT transform and then the results are processed through the proposed decision rules to discriminate external faults from internal ones. A real 400 kV substation model was simulated in EMTP/ATP-Draw software to evaluate the performance of the proposed algorithm. According to the simulation results, the proposed algorithm has high security and dependability in discrimination of external and internal faults and ultra-fast operation.

کلیدواژه‌ها [English]

  • Current signal
  • Superimposed components
  • TT transform
  • Busbar protection
  • Substation
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