Storm causing strange readings

jakeymd1 · 2024-12-07T14:47:52.302Z

Storm Darragh seems to have caused very stange electricity usage on the meters. Lots of other stange behaviour in the house. Not a complete power cut, but some lights not turning on, appliances acting strange.

Does anyone know its possible to fix this data, this is going to mess up my stats.

How’s things in Wales @glyn.hudson @TrystanLea?

Screenshot_20241207_142853_Chrome1440×3120 168 KB

Screenshot_20241207_142914_Chrome3120×1440 238 KB

Screenshot_20241207_142924_Chrome1440×3120 161 KB

Screenshot_20241207_143413_Chrome1440×3120 169 KB

Robert.Wall · 2024-12-07T15:33:55.071Z

I’ve recorded nothing untoward in Birmingham. Here’s my system voltage for the last few days. Zero is the nominal 240 V. In the last 48 hours, the lowest voltage I’ve seen is 230.2 at 17:45 on Thursday 5/12/24.

image1412×702 135 KB

There’s a very limited ‘Edit’ facility in emonCMS →Visualisation →Editor, if your data is visible there. But all that’s available is to either multiply the block of data filling the window by a fraction, or to edit each data point individually. There’s no “+ constant” or “set all in the window to a constant”, and especially nothing like “draw a line manually” (very difficult I would imagine in a browser-based tool), although a straight line between two defined points would be quite a lot easier and it would be a HUGE improvement.

jakeymd1 · 2024-12-07T17:34:17.331Z

I might need some support with this. I can’t even figure out how to get my heatpump to feed in to emoncms.
Could it be because my installer bought the kit so it will be feeding into his account?

Robert.Wall · 2024-12-07T17:40:06.392Z

That’s possible. If it is the case, only @TrystanLea or @glyn.hudson will be able to access your data.

jakeymd1 · 2024-12-08T09:09:50.320Z

It was extremely unusual, I’d never seen anything like it. Some lights were turing on, others weren’t. Tumble drier (heat pump version of course) would turn on but it clearly didn’t like something about the supply so was just making knocking noises. Heat pump controller faulted and the little displays on the heat pump electricity meters were going haywire. They read a peak consumption of over 2MW and 2.3MW back feed. Yes 2 million watts. 1/20,000th of the entire nation grid demand just from my heat pump.

National grid think there was a complete powercut. I’m wondering whether someone nearby had a battery backup that was back feeding into the grid when it shouldn’t have been.
The electricity went off completely about 3 hours later for 30 seconds, then came back on and everything was normal.

@TrystanLea, @glyn.hudson,
Would I be able to get some support fixing this data? Or some way of adding this to me Emoncms account.
07/12/24 between 13:57 and 14:35 (ish) there was a net 72kwh electricty measured after the heat pump had faulted (but before I flipped the breaker), so was actually near zero.

https://emoncms.org/app/view?name=MyHeatpump&readkey=53646698bd10ba801ad47516e7e4a0bc

Marko_Cosic · 2024-12-08T10:24:32.506Z

jakeymd1:

National grid think there was a complete powercut. I’m wondering whether someone nearby had a battery backup that was back feeding into the grid when it shouldn’t have been.

Possibly this
Possibly arcing on a failing supply feeding noise (and high energy RF) down the supply lines that gets picked up by CT meters as it gets dissipated in all the surge protection built into appliances (MOVs etc), coupled with a low overall voltage due to the failing connection having higher resistance until it popped?

The latter can damage things, especially anything with inverters/switching power supplies/RC voltage droppers such as cheap LED lamps

TrystanLea · 2024-12-08T17:29:06.697Z

Hello @jakeymd1 yes Im sure we can fix this, will take a look

TrystanLea · 2024-12-08T17:38:28.786Z

All fixed. We also had a power cut here and had the pleasure of running the house off battery power while disconnected from the grid for the first time albeit what sp energy networks suggested would be an all day outage was only a few hours so battery % only dropped from 78% to 74%. It’s amazing how fast they brought so many customers back online in our area considering the conditions out there!

jakeymd1 · 2024-12-08T17:57:14.594Z

Agreed, alot of great men and women out there keeping the country going every day. Yesterday was testament to how incredible team work is.

I live in a small village, (but not too rural) and they managed to get us back up and running in a few hours, too, when there were far more populated areas suffering from outages. Maybe to do with being so close (less than 1 mile to the front door) to JCB Head Quarters, but I imagine they probably have some backup generators and some kind of dedicated supply.

jakeymd1 · 2024-12-09T07:23:30.369Z

Hi @TrystanLea, theres still something strange going on with the data. All seems correct in emoncms, but heatpumpmonitor.org is still showing an additional 400kwh of electricity usage that emoncms does not.

Screenshot_20241209_072234_Chrome1440×2961 156 KB

Screenshot_20241209_072208_Chrome1440×2961 167 KB

glyn.hudson · 2024-12-09T15:23:54.732Z

I’ve just reloaded the data on HPM, this should fix it

jakeymd1 · 2024-12-09T15:52:49.668Z

Thankyou very much. I’m now in very good company on the 7 day leaderboard.

Screenshot_20241209_155137_Chrome3015×609 101 KB

glyn.hudson · 2024-12-09T16:54:29.001Z

Woop woop!