对配网频发的单相电弧接地故障，建立能够正确反映其特征的数学模型是十分必要的。运用弧隙能量平衡理论在ATP-EMTP上建立接地电弧模型，进一步研究了电弧模型中主要参数对电弧特性的影响规律，达到了反映电弧故障物理特性的目的；最后，将此模型应用于某10 kV配网间歇性电弧接地故障，其过电压倍数符合实际情况，验证了模型正确性。%As the single-phase arcing ground fault often occurs in the distribution network,it is essential to build an accurate model to reflect its characteristics. In this paper,a grounding arc model is built via ATP-EMTP with the arc gap energy-balance theory,and the effects of the model’s major parameters on the arc characteristics are intensively studied so that the physical characteristics of an arc fault can be correctly reflected. Finally,the model is applied to the simulation of intermittent arc grounding faults of a real 10 kV distribution network. The result shows that the over-voltage multiple is compliant with the actual situation,proving the validity of the arc grounding fault model.
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