I was scanning through solar assistant this morning and saw quite a serious grid frequency deviation yesterday at 15h45 on my system in Cpt. This is a quote from Eskom quality of supply document. "Any power with a frequency of as little as 1% above or below the standard 50hz risks damaging equipment and infrastructure if it persists. Small frequency deviations (i.e. -0.5 Hz on a 50 hz network) will result in automatic loadshedding or other control actions to restore system frequency." That frequency spike was 3.4% below the norm my inverter disconnected from grid for that split second.

Edited September 7, 20241 yr by TaliaB

2 hours ago, TaliaB said:

I was scanning through solar assistant this morning and saw quite a serious grid frequency deviation yesterday at 15h45 on my system in Cpt. This is a quote from Eskom quality of supply document. "Any power with a frequency of as little as 1% above or below the standard 50hz risks damaging equipment and infrastructure if it persists. Small frequency deviations (i.e. -0.5 Hz on a 50 hz network) will result in automatic loadshedding or other control actions to restore system frequency." That frequency spike was 3.4% below the norm my inverter disconnected from grid for that split second.

So my equipment did not pick up the spike here in Century City, but could be that my sampling frequency is too low:

12 minutes ago, HendrikBigChief said:

So my equipment did not pick up the spike here in Century City, but could be that my sampling frequency is too low:

Also, on my system I did not see any spike, and I sample every second. see last 24 hours dashboard.

4 hours ago, TaliaB said:

I was scanning through solar assistant this morning and saw quite a serious grid frequency deviation yesterday at 15h45 on my system in Cpt. This is a quote from Eskom quality of supply document. "Any power with a frequency of as little as 1% above or below the standard 50hz risks damaging equipment and infrastructure if it persists. Small frequency deviations (i.e. -0.5 Hz on a 50 hz network) will result in automatic loadshedding or other control actions to restore system frequency." That frequency spike was 3.4% below the norm my inverter disconnected from grid for that split second.

 

The 1st thing when we see such a drop in Freq is could it not be a stray reading. 

As per the Eskom info. At a value of 48.2Hz most generation would have tripped causing a blackout. This is very normal to shut down at such a low level world wide to protect all equipment. 

Freq will also be the same country wide. 

Edited September 7, 20241 yr by Scorp007