基于ZnO均能技术的新型隔直装置研究与应用  

Research and Application of a New DC Blocking Device Based on ZnO Mean Energy Technology

作　　者：胡鹏 于永军 吴伟丽 李德存 祁晓笑 刘勇 HU Peng;YU Yongjun;WU Weili;LI Decun;QI Xiaoxiao;LIU Yong(State Grid Xinjiang Electric Power Research Institute,Urumqi 830000,Xinjiang,China;State Grid Xinjiang Electric Power Co.Ltd.,Urumqi 830000,Xinjiang,China;School of Electrical and Control Engineering,Xi′an University of Science&Technology,Xi′an 710054 Shaanxi,China;Anhui Zhengguangdian Power Technology Co.,Ltd.,Hefei 230000,Anhui,China)

机构地区：[1]国网新疆电力公司,新疆乌鲁木齐830000 [2]国网新疆电力公司电力科学研究院,新疆乌鲁木齐830000 [3]西安科技大学电气与控制工程学院,陕西西安710054 [4]安徽正广电电力技术有限公司,安徽合肥230000

出　　处：《电气传动》2018年第12期86-92,共7页Electric Drive

基　　金：国网新疆电力公司(5230DK150027)

摘　　要：变压器直流偏磁已经成为交、直流混联系统安全运行的重大威胁,采用高效隔直、快速投切的变压器隔直装置可以有效解决这一问题。针对目前电力系统对隔直装置的新要求,基于ZnO组件均能/均流技术和大功率真空放电管快速触发放电技术,考虑电力系统对装置的施工要求和系统短路故障下装置的安全性,设计了一种新型快速直流偏磁隔离装置。为了验证装置的功能,建立了短路故障下变电站主变压器接隔直装置的等效模型,进行了变电站直流偏磁治理的仿真。结果表明:新型隔直装置能够在监测到中性点直流后0.02 ms内动作,快速隔离直流,且能在系统短路状态下利用ZnO装置均流、限压特性以保护隔直电容,从而节约了电容容量和安装空间。Transformer DC bias enlarge rapidly,it puts forward higher requirements to the performance of the blocking device.Aiming at this condition,a new type of DC bias monitoring and isolation grounding device were designed by the mechanism for ZnO components’distribution of average energy/average current technology and high power vacuum tube fast trigger discharge technology.Based on a new type of capacitor isolated DC device,the principle of two kinds of blocking device and working logic were expounded,the equivalent model of the blocking device of the transformer was set up under short circuit fault,and based on this,the simulation model was built.The results show that using a new type of DC blocking device in capacitor can effectively suppress DC magnetic bias in the system under the time range of the system,and protect the capacitor.

关 键 词：直流偏磁 隔直装置 均能技术 快速触发放电 

分 类 号：TM315[电气工程—电机]