applied_heat

My benchmark for utility scale solar is the installation in Australia that was 100MW and 129MWH and cost about 100 million

So making $40/MWH * 100 MWH/day = $4000 per day * 365 day/yr = 1.4 million revenue per year. Not enough to pay back $100 million.

Like you said The economics of it keep improving though Imp

Great point, How much battery capacity and energy the utility will require (big expense for project proponent they have to inevitably recover from ratepayers) for solar or wind farms is another Aspect that has to be studied

More people could perform more studies in parallel but it is a pretty niche skill to be able to perform the studies

The point of the studies is to determine the upgrades required to the transmission system to ensure stability and reliability (prevent cascading failures)

It takes a high level feasibility study to determine rough costs, project proponent financing, detailed study and detailed design, procurement of custom manufactured long lead time equipment, land purchase, environmental studies and permits, construction and finally commissioning. It takes 5 years to get consultancies with the experts to do the studies and design and construction companies contracts signed and completed.

A constraint for determining project feasibility is the lead time on studies which determine the cost of interconnections. To complete the study the PSS/E or PSLF software is required and the model of the utility’s system, so typically only the utility can complete the study since the models are not available externally and they only have so many people permanently employed performing studies.

The study might show that the upgrades required to inject power at a project location and maintain system stability and reliability are too costly and the project can’t proceed as proposed.

The studies are usually performed in the order that the requests are received.

Project proponents are often unaware of where on the grid the most cost effective interconnections are for a given project size.

The feedback loop between proponents and utility could be tightened up if the utility would publish a map showing available capacity or cost to upgrade vs new capacity for different locations on the grid.

That is one way the utility could meet the demand to perform the studies faster with the same number of quants.

“California currently has 18,170MW (18.2 GW) of interconnections to neighboring states in the Western Interconnection, equivalent to approximately one-third of its annual peak electricity demand.“

In my view, 33% of annual peak is not weakly interconnected. Granted that number is from 2003.

I work on hydro electric plant control systems not transmission planning so I can’t say what industry insiders would call weakly interconnected, but on the systems I have worked on one or two ties is weakly interconnected and dozens is not.

https://www.electricpowergroup.com/Downloads/pFinalCAElecGen...

California is part of the WECC, it is not isolated at all.

What plugins are you using?

I used to have a plug-in that did burn down charts but it depended on flash and doesn’t work anymore

Can you provide more detail on your problem and how you solved it? Did you add another category? Did you add another tracker?

I’ve been using redmine for a decade for creating a project task breakdown, tracking time on tasks and projects and using that data to invoice customers, as well as issue tracking.

The interface works, I don’t mind it. It allows export of data easily, and pdf generation.

I wish redmine’s website for showing users what plugins exist and are up to date was a bit better. Plug-ins always seem to fall in to disrepair, and can make upgrades difficult.

I am running it through docker on my synology nas.

I might have got a million samples in to KST before. It was always extremely fast and has great ergonomics for panning and zooming plots

Depends on what you get paid for the day. Maybe someone doesn’t need to work after that

What protocol? Control systems type stuff?

People generally don’t make a lot of noise very early or very late so I don’t find it any more disruptive than the train I can hear tooting it’s horn as it crosses town.

A lot of the mowers etc are turning over to electric so the cacaphony of weekend 2 strikes is fading away

Dunno man, not hearing my neighbors conversations is quite pleasant. Being able to set my daughter down on a blanket in the grass under a tree while we bbq and make dinner is worth more than aesthetic flourish, although the garden is a constant source of pleasure from March when the crocuses bloom to October when the Dahlia’s finally succumb to the frost.

You are in Victoria!

Ah! No need to make any assumptions then.

Big assumption?

What do you use for exploring? KST-plot has been my go to for real time monitoring and after the fact analysis of time series data. It is super fast, I can pan, I can zoom, with keyboard shortcuts, and I can perform functions on the data to create new time series. Airbus is/was a big user of KST for their air frame test data. I haven’t found anything that can replace it

Dunno man Sometimes when I’m on the road I eat at the pub at the bar and usually end up chatting with whoever is right beside me. I’m in Canada

I used to use and recommend qiqqa for full text search, highlighting, and annotating pdfs and managing bibliographies but it seems like zotero has stayed the course and qiqqa wound down. Glad to see a solution still available!

Yep that is a “serious” wave, thanks for sharing

Curious what wave you are riding where drowning was a potential outcome in your mind? I’ve been stuck on the outside too scared to catch a monster in, but drowning never crossed my mind just getting the beat down and getting washed in or sucked back out and Potentially having to paddle some miles to a place that would be easier to get in. Dark with no moon would be unwelcome in that situation.

An airport or hospital might be fed from two different nearby substations. The substations are probably fed from the same transmission lines with parallel circuits. The substations will have transformers with the same winding configuration for a consistent phase shift from transmission to distribution level voltages.

The airport or hospital will procure transformers that have the same winding configuration and impedance so the phase shift and voltage drop across them will also be the same. The low voltage windings of the transformers at the hospital can be paralleled so they both feed the load. Reverse power protection would be implemented so the hospital can’t back feed the distribution line.

What phase difference do you expect in this case? What effect would it have?

Are there better deals readily available?

Automation of what if you don’t mind sharing some general information? A physical machine? Filling and filing of a form?

Why sell the house? Don’t you still need a place to live?

I didn’t think it was going to work and didn’t buy any shares. Dang

I haven’t started using it yet but i identified Victoria metrics as the first time series database I would try as a replacement for our wonderware historian so I won’t have to use AVEVA’s half baked web dashboard product and can use grafana or something else sane instead

I monitor so that when there is a problem I have some data I can use to troubleshoot the problem and identify possible solutions.