Talk:Black start

message: By the way, the sequence described in the article is the exact sequence used by a real utility that I visited. The  Cat diesel generator at the hydro station was started from a Sears Diehard battery. I asked the station's chief engineer what happens if the Diehard is dead. He responded "You see my pickup truck sitting out there in the parking lot..." :-)
Atlant 13:00, 26 January 2006 (UTC)
replies: text: Was the reference to the pickup truck saying he would head for the hills, or going to borrow its battery? --J Clear (talk) 01:28, 10 March 2008 (UTC)
thread_title:  The described sequence 

message: First line of the article:
< A black start is the process of restoring a power station to operation without relying on external energy sources.>
Later:
< black-start power must be provided over the electrical transmission network from other stations >
H'mmmm . . .  86.176.113.219 (talk) 13:55, 24 September 2010 (UTC)
replies: text: How is it now?  The key idea is that the network isn't available to import power, but that you may have a tie line to a specific designated plant that will provide station service power during start-up. ( I'd better fix the rest of it, too...) --Wtshymanski (talk) 14:30, 24 September 2010 (UTC)
thread_title:  Black Start - what is it? 

message: The process is like the following:
# The grid is out, but one HVDC inverter station with IGBT switching elements have energized DC lines coming in.
# A PWM signal is fed into the gates of the IGBTs in the inverter and start to energize the local grid. Immediate area next to the station start to receive power.
# A nearby base load power station start to operate, drawing power from the HVDC inverter station. More lines became energized and more area start to receive power.
# After all the base load stations are started up, including possibly the nuclear power, the black start process is complete.  — Preceding unsigned comment added by Xcvista (talk • contribs) 19:41, 20 January 2015 (UTC)
thread_title:  From academia: PWM-capable HVDC line can be used to black start as well. 

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thread_title:  External links modified 

message: Unreferenced text reads "Wind turbines, mini-hydro, or micro-hydro plants, are often connected to induction generators which are incapable of providing power to re-energize the network." to which I added "Citation needed", and you then reverted. Please don't remove "citation needed" tags before providing a reference or deleting the un-verified text.
This sentence makes several dubious claims. For instance the consideration of a wind turbine, which would be the last source considered for black start power, induction generator or not. Hydro power is a very common choice for black start power and is normally used to re-energize the network. Induction generators are quite capable of starting with the aid of batteries, similar in principal to diesel powered generators starting with the aid of batteries. That induction generators are not self exciting does not imply the other claims are true. If no source is given for these opinions I intend to delete them. Dougmcdonell (talk) 23:44, 1 January 2018 (UTC)
replies: text: You would have a hard time selling black start services to your local utility if your only asset was induction generators, without a large amount of documentation to explain how you're going to use "batteries" in the process. --Wtshymanski (talk) 00:07, 2 January 2018 (UTC)

text: The point about the inability of black starting induction generators is quite valid. For such a generator to produce power, it has to be driven above its synchronous speed. Without any power on the network that you are trying to re-energise, the induction generator has no way of determining what that synchronous speed is. Even if you could somehow excite it with batteries, there is still no means of establishing the synchronous speed.  — Preceding unsigned comment added by 86.149.136.124 (talk) 14:11, 2 January 2018 (UTC)
thread_title:  Induction start 

message: Nuclear power station have standby batteries which cut in automatically if power is cut from the station itself and externally. These are specified to last for days, but in reality would run for over a week. 
I used to be involved with that business. Rustygecko (talk) 11:15, 18 June 2021 (UTC)
thread_title:  Batteries