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Research on Three-Dimensional Dynamic Arc of High-Voltage SF6 Circuit Breaker

Author: JiTengFei
Tutor: CaoYunDong
School: Shenyang University of Technology
Course: Motor and electrical
Keywords: Finite volume method TVD scheme SF6 circuit breaker Airflow Field Three-dimensional arc model
CLC: TM561.3
Type: Master's thesis
Year: 2011
Downloads: 73
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Abstract


In the process of the circuit breaker , the arc phenomenon is a complex process , the energy of the arc of the temperature field and flow field coupling changes directly affect the flow parameters of the arc chamber , even breaking capacity of the circuit breaker . Accordingly, the arc study analysis of the arc characteristics and improve product performance significance. Change when the need to study the space of arc shape , arc energy dissipation process as well as the cool air flow on the the role arc , the two-dimensional structure and static arc model is no longer applicable , it is necessary to establish a three-dimensional calculation model and the three-dimensional dynamic arc model to study it . In this paper, a novel spin arc spin aspirated high voltage SF6 circuit breaker National Natural Science Foundation project , to establish the physical and mathematical model of the process of high-voltage SF6 circuit breaker , the three - dimensional dynamic arc airflow field coupling , and morphology of the arc energy escaping process and airflow field to conduct a study of the role of the arc . First, the establishment of a high - voltage SF6 circuit breaker control equation of the three-dimensional flow field in cylindrical coordinates , and the formula is derived . Finite volume principle , TVD scheme discretized control equation , and the preparation of a three-dimensional flow field calculation program . The classic by calculating Emery example analysis of program results . The analysis results show that the program can capture the shock wave in the convection field , high calculation accuracy . Followed by the establishment of a three-dimensional energy source dynamic arc model , consider the impact of the current changes in pressure , temperature, and arc shape of the entire flow field , through computer coupled the arc with airflow field model solved in parallel , the arc and the combined effect of the airflow field analysis . The simulation results reflect the three-dimensional arc from burning to extinguish the process of morphological changes and arc nozzle upstream pressure .

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CLC: > Industrial Technology > Electrotechnical > Electrical > Electrical switches,circuit breakers > Breaker > Sulfur hexafluoride circuit breaker
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