引用本文: | 赵玉林,牛泽晗,李海凤,汪 清.具有保护功能的配电变压器无触点有载自动调压分接开关[J].电力自动化设备,2016,36(9): |
| ZHAO Yulin,NIU Zehan,LI Haifeng,WANG Qing.Contactless OLTC with protective function for power distribution transformer[J].Electric Power Automation Equipment,2016,36(9): |
|
摘要: |
为防止有载自动调压分接开关(OLTC)的电力电子组件击穿而引起调压绕组短路进而导致OLTC损坏,设计了一种应用低压空气开关对调压绕组进行过流保护的无触点OLTC。通过低压空气开关、监控系统、触发电路的配合,实现当任一组电力电子组件被击穿时,有载调压功能退出,变压器自动恢复到额定分接头继续运行,从而保证了供电可靠性。实验结果表明,所设计的无触点OLTC在配电变压器一次侧出现环流时,能对调压绕组起到保护作用,使变压器可以在额定分接头下继续工作;在配电变压器正常运行时,所设计的无触点OLTC能根据负载电压变化自动调节变压器输出电压。 |
关键词: 配电变压器 无触点 分接开关 保护功能 触发电路 空气开关 |
DOI: |
分类号: |
基金项目:2012黑龙江省高校科技成果产业化前期研发培育项目(1252CGZH30);2013哈尔滨市应用技术研究与开发项目(2013DB2BG015) |
|
Contactless OLTC with protective function for power distribution transformer |
ZHAO Yulin, NIU Zehan, LI Haifeng, WANG Qing
|
School of Electrical Engineering and Information,Northeast Agriculture University,Harbin 150030,China
|
Abstract: |
A kind of contactless OLTC(On Load Tap Changer) is designed,which applies a low-pressure air switch in its voltage-regulating winding for over-current protection to avoid the damage due to the winding short circuit caused by the breakdown of power electronic components. By the cooperation among low-pressure air switch,special triggering circuit and monitoring system,when any group of power electronic components is broken down,the on-load voltage-regulating function is blocked and the transformer is automatically recovered to operate at the rated tap,which ensures the reliability of power supply. The experimental results show that,the voltage-regulating winding of the contactless OLTC designed is protected when a circulating current occurs at the primary side of distribution transformer and the transformer operates at the rated tap;during the normal operation of distribution transformer,the designed contactless OLTC adjusts its output voltage automatically according to the variation of load voltage. |
Key words: distribution transformer contactless tap-changer protective function trigger circuit air switch |