基于ARM的直流系统接地故障检测应用程序设计

发电厂、变电站中的直流系统接地故障检测对于保证电力系统的安全运行十分重要。目前广泛使用的低频信号检测法容易受到直流系统支路中存在的对地分布电容的影响。文章提出了基于S3C44B0X的一套直流系统接地故障检测装置的设计方案,和目前常用的平衡电桥法或低频电流注入法相比,更适用于直流系统大电容接地和环网影响等问题,在此装置上实现了基于小波变换的检测方法,并重点阐述了应用程序的设计,为这一领域的应用研究提供了新的检测手段。

Applied Program Design of DC System Grounding Fault Detection Based on ARM

It is important for power systems that DC system grounding faults in power plants and transformer substations is detected in a timely and precise way.Although widely used nowadays, the detection method of low frequency signal injection is easily influenced by the capacitors between the ground and each branch.A design for DC system grounding fault detection method is introduced in this paper, based on S3C44B0X. Compared with the balance electrical bridge method and the low frequency current injection method, this method is more suitable for DC systems, for it can overcome the influences by grounding capacitors and the loop net. A detection method based on Wavelet Transform is also realized by the device. The design of the application is elaborated, providing a new detection method for the field.