基于数字量设计的环网柜用通用型相位识别器的研究与设计

Research and Design of Universal Phase Identifier for Ring-based Cabinets Based on Digital Design

文章所述通用型相位识别器,应用于识别环网柜母线带电指示器的相位关系,判断线路连接是否错相、缺相等,确定线路连接无误。通过对比普通型产品的原理与缺陷,介绍了通用型相位识别器原理:基于Microchip MCU系统,对A\B两路输入信号进行分压、模拟量采集,应用信号跟随与ADC技术、过零检测技术,对A\B数字信号的相位幅值及相位差进行识别分析,并与系统预设的判断阈值进行比照,通过LED指示灯显示判断结果。

The general-purpose phase recognizer described in this paper was used to identify the phase relation of the live voltage indicator of the ring network cabinet.It was judged whether the line connection is wrong or not and the line eonnection is eorreet.Based on the principle and defect of the general product,the principle of general purpose phase recognizer was introduced. Based on the Mierochip MCU system, the A／B two input signals were divided, analoged, applied signal and ADC teehnology,zero crossing detection Technology,the A／B digital signal phase amplitude and phase differenee to identify the analysis, and with the system to determine the default threshold, through the LED indicator showed the results.