从变压器事故实例看短路试验的必要性

在电力系统中,大型变压器因绕组抗短路强度不足造成绕组失稳损坏事故愈来愈突出。本文通过实例分析了绕组受力情况和损坏原因,指出只有对产品进行短路试验,找出薄弱环节加以改进,才能提高变压器抗短路强度,并提出了抗短路强度的主要措施。

Necessity Explanation of Short-Circuit Test for Transformer by Examples of Transformer Faults

In large power transformers of the electric power system, the faults of unstable damages for windings become more and more evident because of the lower ability to withstand short-circuit for windings. The force applied to winding is analyzed in this paper, as well as the damage cause by examples of transformer faults. It is pointed that the improvement on weak links found out only by short-circuit test is the way to strengthen the ability to withstand short-circuit, and the main measures are also presented to strengthen the ability.