ارائه راهکاری نوین در ارزیابی عملکرد سیستم حفاظت سایت پرتاب ماهواره در برابر صاعقه به روش انتشار گام به گام لیدر صاعقه در فضای سه بعدی

نویسندگان

1 دانشجوی دکترا، دانشکده مهندسی برق و اویونیک، دانشگاه صنعتی مالک اشتر، اصفهان، ایران

2 استادیار، دانشکده مهندسی برق و اویونیک، دانشگاه صنعتی مالک اشتر، اصفهان، ایران

چکیده

برخورد مستقیم صاعقه به سایت پرتاب ماهواره می‌تواند موجب تخریب بسیاری از تجهیزات ارزنده گردد، بنابراین به منظور حفاظت تجهیزات از سیستم حفاظت در برابر صاعقه استفاده می‌شود. اما با توجه به اشکال پیچیده و نامتعارف سایت‌های پرتاب، محاسبه احتمال فرار صاعقه از سیستم حفاظتی از مباحث کلیدی در طراحی سیستم حفاظت به شمار می‌رود. در این مقاله یک مدل آنالیز عددی مبتنی بر روش انتشار گام به گام لیدر صاعقه در فضای سه بعدی به منظور محاسبه احتمال برخورد مستقیم صاعقه به سایت پرتاب پیشنهاد شده است. بدین منظور لیدر پایین‌رونده صاعقه و لیدرهای بالارونده از اجسام روی زمین دنبال می‌شوند و محل برخورد نهایی صاعقه تعیین می‌گردد. روش بارهای فرضی برای شبیه‌سازی کامل سایت پرتاب، صاعقه، سیستم حفاظتی و لیدرهای بالارونده استفاده می‌شود. در نهایت احتمال فرار صاعقه از سیستم حفاظتی برای دو نمونه سایت پرتاب واقعی محاسبه گردیده و عملکرد سیستم‌های حفاظتی مذکور مورد مقایسه قرار می‌گیرد

کلیدواژه‌ها


عنوان مقاله [English]

A New Method to Evaluate the Launch Pad Lightning Protection System Performance by Using LPM in 3-D

نویسندگان [English]

  • Mostafa Yahya Abadi 1
  • Ali Reza Sadooghi 2
1 PhD student, Faculty of Electrical and Avionics Engineering, Malik Ashtar University of Technology, Isfahan, Iran
2 Assistant Professor, Faculty of Electrical and Avionics Engineering, Malik Ashtar University of Technology, Isfahan, Iran
چکیده [English]

Direct lightning strokes to launch pad damage some vital instruments. Thus, the lightning protection system is used
to protect instruments. Calculating the probability of direct lightning strokes is the main consideration in lightning
protection system design, however this calculation is not simple since the shape of launch pad is complex. In this
paper, a 3-D numerical analysis model based on Leader Progression Model (LPM) is proposed to calculate the
probability of direct lightning strokes to launch pads. The progression of lightning downward leader, the inception
and propagation of upward leaders are modeled step by step until final jump. Launch pad, lightning protection system,
downward and upward leaders are modeled by different shapes of charges, and the environment electric field is
computed using charge simulation method. Then, lightning performance of two actual launch pads are evaluated, and
the simulation results are compared. Finally, the high voltage laboratory tests have been achived to validate the
proposed protection system design.

کلیدواژه‌ها [English]

  • Launch Pad
  • Leader Progression Model
  • Charge Simulation Method
  • Upward leaders
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