三相电表掉电检测电路分析及比较

Analysis and Comparison of Power-down Detection Circuit of Three-phase Electricity Meter

分析两种三相智能电表掉电检测及其实现方法。针对智能电表掉电检测的要求,设计了一种可高效检测掉电的电路及对应的软件设计方案和功能简单的普通电表高性价比的掉电检测电路。

Two kinds of three-phase intelligent electric meter power failure detection and its realization method are analyzed.According to the requirements of power failure detection of intelligent electricity meter, a circuit which can detect power failure efficiently and the corresponding software design scheme, and a power down detection circuit with simple function and high cost performance of ordinary electricity meter are designed.