摘要
小电流接地系统故障选线是电力系统继电保护课程教学中的难点,为了更好地使学生掌握这一内容,设计了一种基于USB-4220数据采集卡结合上位机控制的故障选线实验平台。硬件装置中采用了具有多通道同步采集功能的数据采集卡,并设计了不同类型的可调整滤波电路。采集并记录实验数据及波形,对不同继保算法进行横向比较,完成判据指标分析,演示故障选线及跳闸过程。该平台操作简单,可视化与教学实验效果好,与DSP或单片机为核心的装置相比,克服了多通道采集过程中的累积误差影响,为继电保护小电流接地系统故障选线课程提供了实验平台支持。
Fault line selection of the small current grounding system is a difficult point in the teaching of power system relay protection course. In order to make students master this content better, a fault line selection experimental platform based on USB-4220 data acquisition card and upper computer control is designed. The data acquisition card with multi-channel synchronous acquisition function and different types of adjustable filter circuits is adopted in the hardware device. The platform can collect and record the experimental data and waveform, conduct horizontal comparison of different relay protection algorithms, complete criteria index analysis, and demonstrate the fault line selection and tripping process. It is easy to operate and has good effect of visualization and teaching experiment. Compared with the device with DSP or MCU as the core, the platform overcomes the influence of accumulated errors in multi-channel acquisition process and provides experimental platform support for fault line selection course of small current grounding system of relay protection.
作者
于群
尚雪丽
孙国成
YU Qun;SHANG Xueli;SUN Guocheng(College of Electrical Engineering and Automation,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《实验技术与管理》
CAS
北大核心
2021年第3期126-131,共6页
Experimental Technology and Management
关键词
小电流接地系统
故障选线
数据采集
实验平台
small current grounding system
fault line selection
data acquisition
experimental platform
