Optoelectronic watt hour meter using photoelectric power transformer

摘要

The present invention relates to a photovoltaic watt-hour meter using a photovoltaic power transformer, and more icularly, to a photovoltaic watt-hour meter including a photovoltaic drive circuit for transmitting light to an optical power transformer through an optical fiber; A photodetector driving circuit for receiving a voltage and current signal as a modulated light in an optical power transformer and converting the signal into an electrical signal; A zero point adjustment circuit for adjusting a zero point for the voltage and current signals; A zero point adjustment circuit for adjusting a zero point for voltage and current signals; A multiplication circuit for multiplying the voltage and current signals to produce a power signal; An effective / ineffective power setion circuit for seting the active power signal component and the reactive power signal component; A power summing circuit; An effective value conversion circuit for converting an absolute value of electric power into an effective value; A voltage / frequency conversion circuit for generating a frequency corresponding to the effective value; And a power supply circuit. Therefore, there is no need for a sete insulation device, and reliable calculation and integration of the amount of power can be achieved.