Power Quality

Network companies have to deliver electricity to consumers within certain parameters typically covering voltage stability and harmonic content.
Monitoring of voltage and harmonics is particularly important when there is micro-generation, for example PV solar panels are installed locally. When exporting energy the inverters will increase the voltage locally and if it exceeds a set level the inverters will shut down preventing export.

Likewise, adding large loads such as electrical vehicle charge points will pull the voltage down, leading to supply below minimum statutory level and also increasing technical losses.

GridKey can monitor the voltage levels and harmonic content at the substation and highlight any discrepancies.

The example below shows real-time data monitoring voltage in a circuit. The maximum statutory limit is 230v +10% = 253v, as can be seen it is regularly exceeding this when the current levels drop in the middle of the night.