| 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): |
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| 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： |
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| 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） |
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| Contactless OLTC with protective function for power distribution transformer |
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ZHAO Yulin, NIU Zehan, LI Haifeng, WANG Qing
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School of Electrical Engineering and Information，Northeast Agriculture University，Harbin 150030，China
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| 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 |
