精品文档---下载后可任意编辑摘要本文是在 AFCI 进展逐渐成熟，AFCI 产品日益丰富的背景下，对于产生的多级 AFCI 而进行的讨论。由于各种 AFCI 都以不同的形态存在，因此建立各种 AFCI 之间的层次结构就变得异常重要。针对多级 AFCI 连接时可能产生的干扰问题给出解决方案。本文首先从单级 AFCI 出发，将其作为一个黑盒进行建模，给出其基本属性，再将其引用至两级 AFCI 中，在两级的上级发生故障电弧时，下级的 AFCI 亦可以检测到电弧，这就会产生不应该有的关断，本文通过网络手段使各个 AFCI 联通，且使用软件使各 AFCI 产生协作关系，使之可以正确的关断电路，达到保护电路的目的。接着运用二级 AFCI 的讨论模式，将讨论方向引入多级 AFCI 方向，利用两级的模型，可以得出在树形结构下的多级 AFCI 关断方法。本文最后将多级 AFCI 引入智能电网，使其成为智能电网中一个重要的组件。对其中关于网络结构，传输方式，不同电压下测量，对响应时间的要求等问题进行了分析。关键词：AFCI，多级，智能电网精品文档---下载后可任意编辑AbstractThis paper is a research on multi-level AFCI under the background of that when the AFCI technology is developing fast and the AFCI product increase rich. Different kinds of AFCI can exist in different forms, it’s very important to construct the level of different AFCI and can resolve the interference of multi-level AFCI connection.This paper is modeling the signal-level AFCI as a black box firstly to research its relationship between current, voltage and impedance, and then use the concept in the two-level AFCI. When the upper level AFCI detect the fault arc, the lower level AFCI also can detect it. This situation can lead a mistake. We use network to connect different AFCI and use software to collaborative. The solvation can turn off the circuit correctly to protect the circuit.Using the two-level AFCI model, we also can derivation the multi-level AFCI model. We bring the multi-level AFCI into smart grid as an important part ...
