220 kV母线PT二次回路改造分析

Analysis of a Retrofit for PT Secondary Circuit of 220 kV Busbar

对PT二次回路压降超标的问题进行了分析,找出了压降超标的基本原因,并提出了降低压降的措施。220 kV母线PT二次回路改造前后的压降数据表明,改造可以明显地改善压降。理论分析计算表明,此项改造措施可为电力企业挽回可观的经济损失。

The paper analyzes the problem of excessive voltage drop in the secondary circuit of potential transformers(PT),identifies the basic reasons for the excessive voltage drop and proposes countermeasures.The voltage drop data before and after the modification of the PT secondary circuit of the 220 kV busbar shows that the modification can significantly improve voltage drop.Theoretical analysis and calculation show that this modification measure can recover considerable economic losses for power enterprises.