3 ms·
Synchronous machines with no net shaft power are sometimes used to supply reactive power, but these also contribute a coupled rotating mass. (edit: Apparently E
by blattimwind 9y ago
Synchronous machines with no net shaft power are sometimes used to supply reactive power, but these also contribute a coupled rotating mass. (edit: Apparently English people call these "synchronous condenser")
The question of "how can we build a large and stable grid without thousands of tons of rotating mass?" is an area of very active research I've been told.
- consp 9y agoAren't the large Tesla battery farms in Australia being used for that purpose? [1] Basically they use batteries and control systems to correct instead of a rotating mass. I'm not sure about the ability to push several hundreds of MW into the system but at least it gets something done. [1] http://www.bbc.com/news/world-australia-42190358 http://www.bbc.com/news/world-australia-42190358
- blattimwind 9y agoThe rotor in a synchronous machine is coupled magnetically to the grid (basically a spring-mass system where the spring is a rotary field); there is virtually no reaction time in this mechanism. (It should be noted that other motors, including asynchronous machines, contribute as well) AIUI the HPR has reaction times on the order of a few seconds.
- toomuchtodo 9y agoHPR reaction time is milliseconds for frequency response. It reacts faster than the grid operator’s data logger resolution.