基于ADPSS和Sobol的弧光接地暂态特征分析与影响因素关键性辨识

Analysis of Transient Characteristics of Arc Grounding and Identification of Key Factors Based on ADPSS and Sobol

准确把握间歇性电弧接地故障暂态特征和关键性影响因素可为防治单相电弧故障提供必要参考。为此,在Cassie-Mayr电弧模型基础上构建单相接地故障全电弧模型,以期客观地复现弧光接地过程;其次,考虑了包括电源初相角、故障时刻、故障点位置、线路参数等在内的共6个因素的影响,遍历各因素所有可能取值与组合,研究了不同工况下的弧光接地暂态特征;最后,以新疆某10kV配电网为例,构建ADPSS仿真模型,遍历所有实际可能工况模拟弧光接地过程,分析过电压情况,并建立影响因素与弧光接地过电压之间的关联性模型,量化并对比了各影响因素的作用程度,发现故障点位置、故障类型、故障相别时关键影响因素。该研究成果可为治理弧光接地过电压故障提供依据。

It can provide necessary reference for the prevention and control of single-phase arc fault to grasp the transient characteristics and key influencing factors of intermittent arc ground fault accurately.Therefore,based on the Cassie-Mayr arc model,the whole arc model of single-phase grounding fault is constructed in order to objectively reproduce the arc grounding process.Secondly,considering the influence of six factors,including the initial phase angle of power supply,fault time,fault point location,fault type,fault phase,etc.,all possible values and combinations of all factors are traversed,and the arc grounding temporary under different working conditions is studied.Finally,taking a 10 kV distribution network in Xinjiang as an example,the ADPSS simulation model is constructed to simulate the arc grounding process under all practical possible working conditions,analyze the transient characteristics of the over-voltage,establish the correlation model between the influencing factors and the arc grounding over-voltage,quantify and compare the effect degree of each influencing factor,and find the key points of fault location,fault type and fault phase influencing factors.The research results can provide basis for the control of arc grounding over-voltage fault.