一种分布式间隔单元的低成本准同步采样系统的研究  

Research of the low-cost quasi-synchronous sampling system in distribution terminal unit

作　　者：王振华[1] 于同伟 马志敏 李籽良 赵会彬[1] Wang Zhenhua;Yu Tongwei;Ma Zhimin;Li Ziliang;Zhao Huibin(XJ Group Corporation, Xuchang 461000, Henan, China;Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China)

机构地区：[1]许继集团有限公司,河南许昌461000 [2]国网辽宁省电力有限公司电力科学研究院,沈阳110006

出　　处：《电测与仪表》2019年第15期132-136,共5页Electrical Measurement & Instrumentation

基　　金：国家电网公司总部科技项目资助“智能电站配用二次装置通用平台关键技术研究”(5222LK17000Z)

摘　　要：分析了当前10kV保护装置的模拟量采集方案,提出了一种低成本准同步采样系统。该系统采用V型采样插值法,利用AD7616芯片各输入通道间的灵活配置和高速转换,实现对模拟量的准同步采样。此方案采用ZYNQ平台,利用内部AXI总线实现AD数据的高速传输,极大的提高了数据的可靠性和实时性,保障了电网的安全稳定。This paper analyzes the analog acquisition system of the current 10 kV protective device, and presents a method of the low-cost quasi-synchronous sampling system in distribution terminal unit (DTU). This system adopts the V sampling interpolation method, and realizes the quasi-synchronous sampling of analog data by using the flexible configuration and high-speed conversion between input channels of the AD7616 chip. This scheme adopts ZYNQ platform to realize the high speed transmission through using internal AXI bus, which greatly improves the reliability and real-time of AD data and ensures the security and stability of the power grid.

关 键 词：DTU 准同步采样 FPGA 突发模式 

分 类 号：TM93[电气工程—电力电子与电力传动]