移动式比相法配电网接地故障定位同步采集的实现  

Realization of Synchronous Acquisition in Mobile Phase-Comparison Method for Earth Fault Location of Distribution Network

作　　者：张志富[1] 洪云凤[1] 姜彤[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《电网与清洁能源》2012年第1期25-28,共4页Power System and Clean Energy

基　　金：国家高技术研究发展计划(863计划)(2009AA12Z328)~~

摘　　要：根据移动式比相法的定位原理,提出应用北斗导航系统的秒脉冲(1 pulse/s)及UTC来实现零序电压电流的异地同步采集。1 pulse/s及UTC可为采集工作分别提供同步触发信号及时间标定。为验证1 pulse/s信号的同步性,设计了一种基于ARM(Advanced RISC Machines)技术的软硬件平台,实现了不同北斗授时模块1 pulse/s接口精度的测试。选用2.4 GHz射频收发芯片nRF2401来实现移动式零序电流互感器高压端和低压端间数据的无线传输,提出一种预备-触发模式的程序设计方案,以实现三相电流的同步采样。实验室试验验证了所述方法的可行性。According to the fault location principle of mobile phase-comparison, this paper presents a method for simultaneous measurements of zero sequence voltage/current at two different locations by using second pulse 1 pulse/s and UTC in COMPASS. 1 pulse/s and UTC can provide synchronous trigger signal and time stamp for acquisition, respectively. To verify the 1 pulse/s signal synchronization, a software and hardware platform is designed, which can realize the accuracy test of different 1 pulse/s interfaces. A 2.4 GHz RF transceiver chip is used to implement the wireless data transmission between the high-voltage side and the low-voltage side of mobile zero sequence current transformer and a ready-burst mode of program design is proposed to achieve the synchronous sampling of three-phase current. The experimental results demonstrate that the method proposed is effective.

关 键 词：同步采集 北斗导航系统 移动式比相法 ARM NRF2401 

分 类 号：TM774[电气工程—电力系统及自动化]