自动电网动态参数检测仪的硬件结构及软件设计

本文介绍了自动电网动态参数检测仪能够在三个周波(60ms)的时间内检测电网上的三相电压、电流有效值、三相功率因数和频率,计算出相应的三相有功功率、无功功率。当电网参数发生5种情况的异常现象时,打印机将打印出发生异常时刻前后5s(178点测量值)的测量值和发生异常时刻的时间。在电网参数正常情况下,可以任意设定定时打印时间(5min～95min),打印机在定时时间到时刻打印出该时刻的年、月、日、星期、时、分、秒和检测到的16个测量值。显示器能够轮流显示所测的16个值。

The Auto-measuring Instrument for Parameters of 3-Phase AC Power Lines

The auto-measuring instrument can directly measure 3-phase voltage and current RMSes, 3-phase power factors and line frequency, and can com- pute 3-phase active and reactive powers correspondingly within 60 ms. When the parameters present five abnormal cases, the printer will automatically print the parameters beirg measured within 10 seconds before and after the presenting abrormal moment. Under the normal cases of AC lines, the printer can print the parameters being measured and the date by timing the length of time set by the users.