公开(公告)号：US20170025996A1

公开(公告)日：2017-01-26

申请号：US14807538

申请日：2015-07-23

Applicant: ANALOG DEVICES GLOBAL

Inventor： GORDON CHEUNG ,  JOHN A. HAYDEN ,  HANS BRUEGGEMANN ,  AHMED ALI MOHAMED

IPC: H02S50/10 ,  G01R31/40 ,  G01R31/02

CPC classification number: H02S50/10 ,  G01R19/2509 ,  G01R31/025 ,  G01R31/40 ,  H02H1/0015 ,  H02H1/0092

Abstract: Switching interference is a primary artifact which affects the accuracy of arc detectors. To address switching interference, conventional arc detectors employ computationally intensive techniques which are often designed specifically for a target application. Thus, conventional arc detectors require a significant amount of hardware to accurately detect arc faults, which can increase costs of the power systems and prohibit wide deployment of arc detectors. With improved signal processing, a unique method for arc detection can accurately detect arc faults efficiently while tolerate switching interference from an inverter of the power system. Specifically, the method provides accurate but efficient arc detection by using a small Fast Fourier Transform with coherent sampling that is accomplished with a common clock generator in combination with signal conditioning. The overall system implementing the method is also programmable to suit a variety of target applications.

Abstract translation: 开关干扰是影响电弧检测器精度的主要工件。 为了解决切换干扰，常规电弧检测器采用通常专为目标应用设计的计算密集型技术。 因此，常规的电弧检测器需要大量的硬件来精确地检测电弧故障，这可以增加电力系统的成本并且禁止电弧检测器的广泛部署。 通过改进的信号处理，电弧检测的独特方法可以有效地准确检测电弧故障，同时容忍来自电力系统的逆变器的开关干扰。 具体地，该方法通过使用具有相干采样的小型快速傅立叶变换来提供精确而有效的电弧检测，其通过公共时钟发生器与信号调节相结合来完成。 实施该方法的整个系统也是可编程的，以适应各种目标应用。