摘要
文中针对电容分压电子式电压互感器(EVT)模拟小信号采用长线直接传输到馈线自动化终端(FTU)时信号衰减严重且容易受到外部电磁干扰导致系统电压测量不准的问题,设计了一个适用于一二次深度融合柱上开关的就地采集模块。文中首先阐述了EVT小信号就地采集传输模块的整体设计架构,详细介绍小信号防护与隔离、信号采集与调理、EVT相位补偿方法、数字化信号传输硬件电路设计及软件流程。最后进行了一二次融合精度测试,并随一二次深度融合柱上开关通过第三方型式试验验证。试验结果表明:该就地采集模块能满足0.2级测量精度且适用于一二次深度融合柱上开关的应用需求。
As for such problem as the serious signal attenuation and incorrect measurement of system voltage due to external electromagnetic interference in case of transmitting the analog small signal of capacitor voltage divider electronic voltage transformer(EVT)to the feed terminal unit(TFU),a local acquisition module suitable for primary and secondary deep fusion pole switch is designed in this paper.Firstly,the overall design framework of the EVT small signal local acquisition and transmission module was described,the small signal isolation and protection,signal acquisition and conditioning,phase compensation method of EVT,digital signal transmission hardware circuit design and software flow were introduced in detail.Finally,the primary and secondary fusion accuracy tests were tested and the type tests were carried out along with the primary and secondary depth fusion pole switches by the third party.The test results show that the local acquisition module can meet the 0.2 accuracy class and is applicable for the application requirements of the primary and secondary depth fusion pole switch.
作者
戴冬云
顾晓东
付鲁军
游一民
殷晓刚
赵彤
DAI Dongyun;GU Xiaodong;FU Lujun;YOU Yimin;YIN Xiaogang;ZHAO Tong(School of Electrical Engineering and Automation,Xiamen University of Technology,Fujian Xiamen 361024,China;Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control,Fujian Xiamen 361006,China;Xi’an High Voltage Apparatus Research Institute Co.,Ltd.,Xi’an 710077,China)
出处
《高压电器》
CAS
CSCD
北大核心
2023年第9期304-311,共8页
High Voltage Apparatus
基金
中国西电集团研发项目(配网一二次融合类设备开发)。
关键词
一二次深度融合
柱上开关
EVT
就地采集
数字化传输
primary and secondary deep fusion
pole switch
electronic voltage transformer
local acquisition
digital transmission
