时域、频域角度下对电感型避雷针防雷机理的研究.docVIP

时域、频域角度下对电感型避雷针 防雷机理的研究 摘 要 架空输电线路发生跳闸事故最常见的原因是发生雷击，为了减少发生事故次数，相关研究人员研发了多种防雷装置，其中当前关注最大的就是电感型，当前还无深入的揭示电感型避雷针的防雷机理。 正是在上述背景下，本文针对该问题，才有有限元的方法详细探讨电感型避雷针的等效分布参数，然后利用 PSCAD 电磁暂态仿真软件，进行了仿真分析，根据建立的等效电路模型，进行了计算，通过计算得到了相关的分布参数，详细探讨了在220 kV 架空输电线路雷电过电压和反击耐雷水平。 然后本文根据分布参数产生的影响，详细分析了电感、匝间电容、对地电容对雷电流闭合和绝缘子两端电压波形产生的影响，进而分析了对分布参数优化的相关措施，对话从时域和频域的角度。论证整个电感型避雷针防雷机理。通过仿真实验研究和分析，相关的研究结果表明，当电感型避雷针参数设置恰当，能够有效的降低雷电流陡度，从而显著提升整个输电线路的反击耐雷水平。 关键词：电感型避雷针；防雷机理；反击耐雷水平 Abstract Overhead transmission line trip accident is the most common causes of lightning activity, in order to reduce the number of accidents, the researchers developed a variety of lightning protection devices, one of the biggest current concern is the inductance model, currently there is no further reveal inductance type lightning protection mechanism of the lightning rod. It is under the above background, this paper aimed at the problem, there is a method of finite element that discusses the equivalent parameters of inductance type lightning rod, and then using the electromagnetic transient simulation software PSCAD, has carried on the simulation analysis, according to the established equivalent circuit model, calculated, is obtained by calculating the related parameters, discussed in detail in the 220 kV overhead transmission line lightning resisting level of lightning over-voltage and counter. Then according to the impact of distributed parameter, analyzes in detail the turn-to-turn capacitor, inductor, closed to ground capacitance of lightning current and the influence of the voltage waveform on both ends of the insulator, then analyzed the distribution parameter optimization measures, dialogue from the view of time domain and frequency domain. Demonstrate the inductance type lightning lightning protection mechanism. Through simulation experiment research and analysis of relevant research results show that when the lightning rod, inductance type parameter is set properly, can effectively reduce lightning current gradien