Development of a DC arc model of a low-voltage circuit breaker
| Jazyk: | ruština |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
liquids
ÑлекÑÑомагниÑÐ½Ð°Ñ ÑвÑÐ·Ñ Ð´ÑговÑе ÑазÑÑÐ´Ñ Ð¶Ð¸Ð´ÐºÐ¾ÑÑи magnetic fields ÑиÑленное моделиÑование ÑлекÑÑомагниÑное моделиÑование ÑеÑмиÑеÑкий анализ numerical simulation волÑÑ-ампеÑнÑе Ñ Ð°ÑакÑеÑиÑÑики current-voltage characteristics electromagnetic communication arc discharges магниÑнÑе Ð¿Ð¾Ð»Ñ thermal analysis electromagnetic simulation |
| DOI: | 10.18720/spbpu/3/2022/vr/vr22-2422 |
| Popis: | Тема вÑпÑÑкной квалиÑикаÑионной ÑабоÑÑ: «РазÑабоÑка модели дÑги поÑÑоÑнного Ñока низковолÑÑного вÑклÑÑаÑелÑ».ÐÐ°Ð½Ð½Ð°Ñ ÑабоÑа поÑвÑÑена иÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¿Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ ÑлекÑÑиÑеÑкой дÑги в пеÑиод вÑемени Ð¾Ñ Ð¿Ð¾ÑÐ²Ð»ÐµÐ½Ð¸Ñ Ð´Ñги Ð¼ÐµÐ¶Ð´Ñ Ð³Ð»Ð°Ð²Ð½Ñми конÑакÑами до Ð¿Ð¾Ð¿Ð°Ð´Ð°Ð½Ð¸Ñ Ð´Ñги в плаÑÑÐ¸Ð½Ñ Ð´ÑгогаÑиÑелÑного ÑÑÑÑойÑÑва. ÐадаÑи, коÑоÑÑе ÑеÑалиÑÑ Ð² Ñ Ð¾Ð´Ðµ иÑÑледованиÑ:ÐÐ±Ð·Ð¾Ñ ÑÑÑеÑÑвÑÑÑÐ¸Ñ ÐºÐ¾Ð½ÑÑÑÑкÑий авÑомаÑиÑеÑÐºÐ¸Ñ Ð²ÑклÑÑаÑелей и пÑинÑипов и Ñежимов Ð¸Ñ ÑабоÑÑ.ÐпÑеделение и анализ оÑновнÑÑ ÑизиÑеÑÐºÐ¸Ñ Ð¿ÑоÑеÑÑов, пÑоиÑÑ Ð¾Ð´ÑÑÐ¸Ñ Ð² Ð¼Ð¾Ð¼ÐµÐ½Ñ Ð³Ð¾ÑÐµÐ½Ð¸Ñ ÑлекÑÑиÑеÑкой дÑги.ÐÑоизведен вÑÐ±Ð¾Ñ ÐºÐ¾Ð½ÑÑÑÑкÑии Ð´Ð»Ñ Ð¸ÑÑледованиÑ. РазÑабоÑка маÑемаÑиÑеÑкой модели авÑомаÑиÑеÑкого вÑклÑÑаÑелÑ.ÐÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½Ñ ÑпÑоÑениÑ, Ð½ÐµÐ¾Ð±Ñ Ð¾Ð´Ð¸Ð¼Ñе Ð´Ð»Ñ Ð¾Ð¿ÑимизиÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑоÑеÑÑа моделиÑованиÑ.РаÑÑеÑÐ½Ð°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ Ð±Ñла Ñеализована в пÑогÑаммном обеÑпеÑении COMSOL Multiphysics, за ÑÑÐµÑ Ð²Ð½ÑÑÑÐµÐ½Ð½Ð¸Ñ Ð¸Ð½ÑеÑÑейÑов пÑогÑаммÑ. Также пÑи ÑеализаÑии ÑÑиÑÑвалоÑÑ Ð´Ð²Ð¸Ð¶ÐµÐ½Ð¸Ðµ одного из конÑакÑов Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð¸Ð½ÑеÑÑейÑа Moving Mesh.ÐолÑÑеннÑе ÑезÑлÑÑаÑÑ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿Ð¾Ð·Ð²Ð¾Ð»Ð¸Ð»Ð¸ пÑоанализиÑоваÑÑ Ð½ÐµÐºÐ¾ÑоÑÑе ÑизиÑеÑкие пÑоÑеÑÑÑ, пÑоиÑÑ Ð¾Ð´ÑÑие пÑи гоÑении ÑлекÑÑиÑеÑкой дÑги в коÑпÑÑе авÑомаÑиÑеÑкого вÑклÑÑаÑÐµÐ»Ñ Ð¿Ð¾ÑÑоÑнного Ñока. Рименно гÑаÑик Ð¸Ð·Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑлекÑÑиÑеÑкого поÑенÑиала, плоÑноÑÑи магниÑного поÑока, велиÑÐ¸Ð½Ñ Ð¸ напÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ ÑÐ¸Ð»Ñ ÐоÑенÑа, дейÑÑвÑÑÑей на ÑлекÑÑиÑеÑкÑÑ Ð´ÑгÑ, Ð¸Ð·Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑемпеÑаÑÑÑÑ, за ÑÑÐµÑ Ð´Ñги и оÑÐ²ÐµÐ´ÐµÐ½Ð¸Ñ Ñепла.  Topic of the final qualification work: "Development of a DC arc model of a low-voltage circuit breaker". This work is devoted to identifying signs of arc detection in the period of time from arc detection among the main contact persons to arc detection in the plates of the arc chute. Tasks that were solved during the study:1. Review of existing designs of automatic switches and principles and modes of their operation.2. Determination and analysis of the main physical processes occurring now of electric arc burning.3. The choice of design for the study was made. Development of a mathematical model of a circuit breaker.4. Simplifications necessary to optimize the modeling process have been made.5. The calculation model was implemented in the COMSOL Multiphysics software, through the internal interfaces of the program. Also, the implementation considered the movement of one of the contacts using the Moving Mesh interface. The obtained simulation results made it possible to analyze some of the physical processes that occur during the burning of an electric arc in the case of a DC automatic circuit breaker. Namely, a graph of changes in the electric potential, magnetic flux density, magnitude and direction of the Lorentz force acting on an electric arc, temperature changes due to the arc and heat removal. |
| Databáze: | OpenAIRE |
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