Space charge accumulation evaluation method based on two-terminal current

The invention belongs to the field of electrical insulating material monitoring, and particularly relates to a direct-current electric field space charge evaluation scheme about an insulating material. According to the method, the space charge accumulation condition of the insulating material in the operation process can be evaluated by measuring and recording the current at the two ends of the material and the curve of the current under the condition that the space charge is not directly measured, and the insulation condition of the insulating material can be evaluated. Compared with an existing space charge measuring device, the space charge measuring device has the advantages of low manufacturing cost, simple equipment and the like. And the defect that the current space charge measuring device cannot evaluate the space charge accumulation condition of the insulating material in operation can be overcome. 本发明属于电气绝缘材料监测领域，特别涉及一种关于绝缘材料的直流电场空间电荷评估方案。本方法可在不对空间电荷进行直接测量的条件下，通过测量记录材料两端电流及其曲线对运行过程中绝缘材料空间电荷积累状况进行评估，