CAJ | 학술논문

针对配电变压器在短路电流冲击中会产生绕组变形，提出一种配电变压器绕组变形在线诊断的方法。变压器绕组变形导致变压器的短路电抗变化，通过测量短路电抗的变化量来诊断配电变压器的变形程度。通过分析变压器等效电路模型建立配电变压器短路电抗与其一、二次侧电压和电流的关系，试验采集配电变压器的电压和电流信号，计算变压器的短路电抗，进行变压器绕组变形的在线诊断。试验结果显示配电变压器绕组变形诊断系统的有效性和准确性。
침대배전변압기재단로전류충격중회산생요조변형，제출일충배전변압기요조변형재선진단적방법。변압기요조변형도치변압기적단로전항변화，통과측량단로전항적변화량래진단배전변압기적변형정도。통과분석변압기등효전로모형건립배전변압기단로전항여기일、이차측전압화전류적관계，시험채집배전변압기적전압화전류신호，계산변압기적단로전항，진행변압기요조변형적재선진단。시험결과현시배전변압기요조변형진단계통적유효성화준학성。
In view of the fact that distribution transformer winding will be deformed on the impact of the short-circuit current, this paper proposed a novel on-line diagnosis method of winding deformation for distribution transformers.Transformer winding deformation leads to changes in the transformer short-circuit reactance,so we can diagnose the extent of deformation of the distribution transformers by measuring the amount of the change of the short-circuit reactance. First of all, the relationship between the short-circuit reactance of the distribution transformerand the voltage of the primary and secondary side and the current was developed based on the analysis of the equivalent circuit model of the transformer. And then the short-circuit reactance was computed and the on-line diagnosis of the distribution transformer winding deformation was made by collecting the voltage and current signals of the distribution transformer.The test results verified the effectiveness and accuracy of the proposed method .