摘要
针对传统电磁式电流互感器在检测脉动直流和平滑直流中存在的不足,文章提出了一种基于磁调制式电流互感器的剩余电流检测模块,结合dsPIC33FJ系列单片机,通过检测电流互感器二次侧线圈电流信号的低频分量,来获取剩余电流信号的大小和类型,并配合波形识别算法,以提高检测模块对各种剩余电流类型的识别灵敏度,将其应用到低压配电网的配电线路中,能够实现对交直流剩余电流的检测与保护。经过验证,该模块能够有效检测和识别剩余电流波形,满足设计要求。
Focus on the shortcomings of traditional electromagnetic residual current transformers in detecting pulsed DC and smooth DC, this paper presents a residual current detection module based on magnetic modulation current transformer. Combined with dsP IC33 FJ series MCU, the current value and type of the residual current signal are obtained by detecting the low frequency component of the secondary side current signal of the transformer. Waveform recognition algorithm is used to improve the detection sensitivity of the detection module for various residual current. Then applies it to the distribution line of the low voltage distribution network, which can detect and protect the residual current of AC and DC. Through testing, the module can detect and identify residual current waveforms effectively to meet design requirements.
作者
陈作开
许志红
CHEN Zuokai;XU Zhihong(College of Electrical Engineering and Automation Fuzhou University,Fuzhou 350108,China;Fujian Key Laboratory of New Energy Generation and Power Conversion,Fuzhou 350108,China)
出处
《供用电》
2019年第12期22-28,共7页
Distribution & Utilization
基金
福建省2018科技创新领军人才资助项目~~
关键词
磁调制
低频分量
波形识别
低压配电网
交直流检测
magnetic modulation
low frequency component
waveform recognition
low voltage distribution network
AC/DC detection
