3-phase energy monitoring system


I develop a kit for 3-phase and 1-phase energy monitor system which included 3 current sensor and 1 voltage reference circuit. in contrast, Arduino energy monitor - measuring mains voltage and current in https://openenergymonitor.org/emon/node/58, I use voltage reference circuit rather 9 v power adapter. In this circuit, i generate 9v ac voltage from 5v dc source with transformer and apply atmega-328p chip. For software, I use emonlib library. If ı measure only current, I obtained true values with emonlib libraries current-only example code. But when ı want to measure voltage and current together, with emonlib libraries current and voltage example code, I cant obtained estimated values. When I use voltage reference circuit and current sensor, I can apply positive voltage between 0V and the ADC reference voltage to Arduino analog input but I cant obtained true values

İf you help me for this issue, I will be glad.


Robert Wall's picture

Re: 3-phase energy monitoring system

Read the article in Resources > Building Blocks about 3-phase systems to see why your sketch does not work, then use the 3-phase sketch which you will find on GitHub. That sketch is the ONLY one suitable for measuring 3-phase real power. All the other sketches - and indeed the OEM hardware itself - are designed for the single-phase system that domestic users have in the UK.

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