Electrical power quality data collection system of self -adaptation electric wire netting frequency

The utility model discloses an electrical power quality data collection system of self -adaptation electric wire netting frequency, include that general electrical power quality data collection module and sampling frequency are from adaptation module. General electrical power quality data collection module carries out data acquisition and storage to voltage, the current signal that comes from the mutual -inductor, and sampling frequency adopts second order active low -pass filter and crosses the zero comparator from adaptation module and imports the electric power signal conversion one -tenth square wave of input to FPGA's sampling frequency controller. The sampling frequency controller passes through the 100MHz clock to be measured and to be surveyed signal of telecommunication primitive period and frequency, and ADC's sampling frequency is adjusted for fundamental frequency's integral multiple in real time to 10 cycles of every or 12 cycles, ensures data collection's integrality, realizes sampling frequency's self -adaptation dynamic adjustment, and furthest's the frequency spectrum that reduces leaks, improves electric energy mass parameter measuring accuracy nature.