基于ARM+DSP结构的PT铁磁谐振智能消谐装置设计

电磁式电压互感器在电网监测系统中是相当重要的设备。由于PT铁磁电感的饱和引发铁磁谐振从而产生长时间的过电压是电力系统中较为常见的一类问题。为了解决该问题,设计了一种新型的基于ARM+DSP结构的智能铁磁谐振抑制装置。利用DSP芯片通过快速傅里叶变换算法对配电网电压数据进行分析,判断铁磁谐振是否产生,并与ARM芯片通信。利用ARM控制阻尼电阻的投切来完成对铁磁谐振的抑制以及对相关谐振信息的显示、存储和上传。该装置充分利用DSP的运算能力和ARM的控制能力从而准确快速检测出铁磁谐振是否发生并对其进行快速抑制和存储。

Design of intelligent suppression device for PT ferroresonance based on ARM+DSP

Potential Transformers (PT) are very important devices of monitoring the states of power system. The ferroresonance causes long-time over-voltage due to the saturation of the PT ferromagnetic inductors. To solve this problem, an intelligent suppression device of PT ferroresonance based on ARM and DSP is proposed. The DSP chip uses fast Fourier transform algorithm to analyze the distribution network voltage and judge the generation of ferroresonance, and then communicates with ARM chip. The ARM chip controls the switch of damping resistance to complete the suppression of ferroresonance and display / store / upload the relevant ferroresonance information. The device can accurately and quickly detect whether the ferroresonance occurs and rapidly suppresses it and records the information of it at the same time by making full use of the computing power of DSP and the control ability of ARM.