Worked a complaint yesterday where the new solar system is not getting to work at full potential because the inverter is shutting down before the peak can be reached.
The inverter log alarms are coming back as PQ distortion. There are two different PV systems on the property fed by the POCO on a single phase primary tap with two overhead transformers and independent metering. The one system at the barn is older and has no problem but the current distortion was seen, the new one is at the house and is only a couple months old. The Solar company keeps pushing homeowner back to the POCO.
Test with Fluke 345 PQ show 1% THDv and 8% THDi with his normal load. The current wave was ugly. This was the first time I have seen the current wave pulse wave form like a heartbeat.
I want to blame settings on the inverter for kicking it off line and customer load for the crappy current (technical term). I considered removing the customer load and connect a 10kW resistive load to see if current stayed choppy.
We deal with harmonics in the oilfield caused by VFDs but this POCO circuit is mostly rural residential and far from the oilfield.
What have you guys seen?
I am just getting started on this complaint.
PQ recorders have been installed and will be pulled in a week.
The inverter log alarms are coming back as PQ distortion. There are two different PV systems on the property fed by the POCO on a single phase primary tap with two overhead transformers and independent metering. The one system at the barn is older and has no problem but the current distortion was seen, the new one is at the house and is only a couple months old. The Solar company keeps pushing homeowner back to the POCO.
Test with Fluke 345 PQ show 1% THDv and 8% THDi with his normal load. The current wave was ugly. This was the first time I have seen the current wave pulse wave form like a heartbeat.
I want to blame settings on the inverter for kicking it off line and customer load for the crappy current (technical term). I considered removing the customer load and connect a 10kW resistive load to see if current stayed choppy.
We deal with harmonics in the oilfield caused by VFDs but this POCO circuit is mostly rural residential and far from the oilfield.
What have you guys seen?
I am just getting started on this complaint.
PQ recorders have been installed and will be pulled in a week.