Recent content by Fisherman199

I don't know much about the specifics of his install but I'll assume he intends a grounding field and twisted cables. I don't know why one wouldn't. my experience with substations says that often how things should be done is replaced with what budget allows. my experience with solar/battery/wind...

I was posed a question recently by a friend doing some planning work on a PV install near a swamp in nothern territories. He asked how close he could locate the PV site to their transmission lines. Apparently, they've never had this question internally. I'll admit that this is not one I've...

there's a distinction in voltage and voltage drop. voltage is determined by generation and by operating requirements of the system. you seem to be confusing the two (system voltage and voltage drop). V_drop = i*r voltage drop is calculated of irrespective of the nominal voltage of the system...

when it happened i was sent some frequency captures from a friend and the frequency went far below any tolerances for dynamic stability of synchronous machines. I'm having trouble locating the picture now but I'll keep trying. i have not kept with the latest, but I have heard more over time and...

you will not find anything like you mention at comparable cost to solar inverters. net-metering is done by the utility meter/meters. smart meters can be programmed to net meter using only one meter. traditionally two meters were used at different polarities. most utilities will be most...

i have had utility customers which use Combined Heat and Power (CHP) gas turbines to generator for their location and to sell onto the system via net-metering. the CHP modules have inverters and can operate as either following or separately derived system (using either utility voltage reference...

a strong system is a system which has capability of significant fault current contribution into nearly immediate voltage decay. The short-hand way of looking at that is the 3-p-g bolted fault at a system busbar and 1-p-g fault at the same system busbar. if they're similar in magnitude, the...

I'm not @anorlunda but I remember reading some moons ago that there were inversion technologies which solved the inertia question. Inertial signal can be essentially replicated on the grid level. That said, to my memory, I have not read in any interconnection study where this sort of technology...

On a related note, many PPAs are in dispute for off-shore wind in NY area. procurements are state-sanctioned but build-outs just aren't economical. Firms are trying to renegotiate left and right.

Jut to give a little back to the community, here's a quick run-down of what happened: A bitcoin miner is fed off a single 1200 amp breaker. Regulators have been changed to 12% regulation to handle more amperage (usually set to 5%). and the breaker TOC settings are at 720 (per phase) with a...

They are constant. This represents a range of issues but none that can't be addressed from the inclusion of relaying or reclosing.

I don't think there is either but this seems to be a source of debate. An engineer yesterday was talking about the chips of the mining rigs as if they were significant to overall transient/harmonic injection. I'm constantly surprised by how much I don't know so I didn't say anything during the...

Yes, but the machines installed that I'm concerned about have hash rates in the TH/s.

No, this is on utility scale.

There is custom hardware built/designed specifically for mining. It's the only way to get a good hash rate. Mining space is saturated (though less so now that it's banned in China). It's all very impressive but the machine are useless for anything besides mining bitcoin.