【摘要】：綜合考慮半波長輸電線路潛供電弧所受電磁力、熱浮力、風載荷和空氣阻力的多場耦合作用,并納入鏈式電弧模型,建立了潛供電弧的受力方程和運動模型。通過深入分析弧根的形成與運動機制,建立了潛供電弧的弧根模型,并提出電流元長度的最優(yōu)選取方法。開展了半波長潛供電弧的物理模擬實驗,并將仿真結果與實驗結果進行對比,驗證了所建仿真模型的有效性。通過比較不同潛供電流、風速和風向下潛供電弧的運動軌跡與自熄時間,分析了風載荷、熱浮力與電磁力對電弧的作用機制,表明所建電弧模型能有效計及風載荷對潛供電弧運動與自熄特性的影響�；诜抡娣治�,獲得了不同起弧位置的電弧運動軌跡與自熄時間,指出在電極始端起弧時潛供電弧的自熄時間更長,較難熄滅。仿真結果再現(xiàn)了潛供電弧向電極末端運動過程中上弧根的跳躍現(xiàn)象,這可合理解釋實驗中上弧根位置與弧柱比較接近而落后于下弧根的情形。
[Abstract]:Considering the coupling effect of electromagnetic force, thermal buoyancy, wind load and air resistance on the submersible arc of half-wavelength transmission line, the force equation and motion model of the submersible arc are established by incorporating the chain arc model. By analyzing the formation and motion mechanism of arc root, the arc root model of submersible arc is established, and the optimal selection method of current element length is put forward. The physical simulation experiment of half-wavelength submersible arc is carried out, and the validity of the simulation model is verified by comparing the simulation results with the experimental results. The action mechanism of wind load, thermal buoyancy and electromagnetic force on arc is analyzed by comparing the trajectory and self-extinguishing time of submersible arc with different potential current, wind speed and wind direction. It is shown that the arc model can effectively take into account the effect of wind load on the motion and self-extinguishing characteristics of submersible arc. Based on the simulation analysis, the arc trajectory and the self-extinguishing time of arc with different starting positions are obtained. It is pointed out that the self-extinguishing time of submersible arc is longer and it is more difficult to extinguish when the arc starts at the beginning of the electrode. The simulation results reappear the jump phenomenon of the upper arc root in the process of the arc moving towards the electrode end, which can reasonably explain that the position of the upper arc root is close to the arc column and lags behind the lower arc root in the experiment.
【作者單位】： 新能源電力系統(tǒng)國家重點實驗室(華北電力大學);山東大學電氣工程學院;中國電力科學研究院;
【基金】：國家自然科學基金項目(51277061,51420105011) 國家電網(wǎng)公司科技項目(GY71-14-032)~~
【分類號】：TM751

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