摘要
[目的]当变压器在轻载或者空载合闸时,因变压器自身的励磁特性以及其它综合原因,常会产生较大的励磁涌流并引起跳闸事故。过大的励磁涌流,有可能引起变压器内部绕组的损伤,减短其使用寿命。常用涌流抑制技术在三相联动断路器中的应用具有一定的局限性,因而在工程应用中急需解决该问题。[方法]采用基于偏磁与剩磁互克技术的涌流抑制装置,对一个三相联动断路器控制回路进行了改造,并进行了空载合闸试验。[结果]试验结果表明:该项技术在三相联动断路器控制中能够抑制涌流,并且抑制效果良好。[结论]该项技术稳定有效,可在实际工程中推广。
[Introduction]When a transformer is in light load or no-load,the excitation characteristic of the transformer and other comprehensive reasons usually produce large inrush current and cause trip accident.Excessive inrush current may cause damage to transformer internal winding and short service life.Common suppression inrush current technology in the application of three-phase interconnected circuit breaker has certain limitations,therefore,it is urgent to solve this problem in engineering applications.[Method]This article applied a specialized device which is based on the theory that the magnetic biasing opposites the remanence.After updating a three-phase interconnected circuit breaker′s control circuit,this article carried on a no-load test.[Result]The result demonstrates that this technology can suppress inrush current in the control of three-phase interconnected circuit breaker,and the suppression effect is good.[Conclusion]This technology is stable and effective and can be promoted in practical projects.
作者
白晋川
杜颖
BAI Jinchuan;DU Ying(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,China)
出处
《南方能源建设》
2018年第A01期58-64,共7页
Southern Energy Construction
基金
中国能建广东院科技项目"柔性直流输电技术研究"(EV 00681W)
关键词
涌流抑制
三相联动断路器
偏磁
剩磁
suppression inrush current
three-phase interconnected circuit breaker
magnetic biasing
remanence
