Hello all,
I've been searching for info to fill out my understanding of the operation of Florida's bulk power system, and came across this: https://www.nrel.gov/docs/fy21osti/79385.pdf
The document is principally about the growing amount of solar power feeding Florida's grid, but beginning on...
With respect, that doesn't make sense to me; uncoupled speed will be some nominal amount slower than synchronous speed, coupled but unloaded speed will typically apply some minimal but measurable mechanical and/or windage load to the shafting and therefore result in a slightly lower speed, and...
Depending on which energy sources are available, might a steam compressor be of use? I haven't checked the thermodynamics or anything, I'm just asking the question; my first employer out of college used one, although not with steam anywhere near 700° C . . .
That notwithstanding, and depending...
More or less, yes; if B has a Static VAR Compensator it would typically be capable of metering the [sum of the] reactive power coming in from A and then ramping itself on a feedback basis until the vectorial sum of reactive power flowing from A to B is zero. Note however that providing more...
Hi Bill,
Gotcha.
In my practice, VAR flows on both our system and between us and our neighbours were indeed optimized to provide for the maximum system capacity, whether for simple power flows within our own system or for wheeling purchases through.
Interestingly enough, though, at the...
If I'm picturing what you're saying correctly, that places "supply transformers" and grid transformers" in series, if viewed in a brutally simplistic power flow way.
Good observation, Inch; in our case here in Ontario, the Independent Electricity System Operator [IESO] is both a Transmission System Operator and a Balancing Authority, with these two interdependent functions being performed within the same Control Room "by two separate yet equally important...
I'm confused by this sentence, Bill; "voltage adjustment is not used" . . to do what? For what purpose? And"to be effective" . . .again, at what?
I'm not grasping the scenario you're describing . . . why would two transformers, operating in parallel, have one described as a supply transformer...
Hey Bill,
Sounds like we've both had the chance to experiment with the same stuff.
So I reiterate: with two transformers in parallel, you can definitely shift the VARS between them, but you can not control the vectorial sum of reactive power drawn by the load, only the load determines that. I...
I reside in, and worked in Ontario, Canada, and never heard of a "reactive supply and voltage charge" . . . but that doesn't mean it isn't out there and I just never learned of it.
Anyone else from ON can weigh in?
I was not even peripherally involved in the hourly or other transactions on the grid, but to my understanding what bacon4life wrote is pretty well spot on; true enough, though, that capacity is measured in kVA/MVA, and excessive reactive power flows can limit the transmission of real power on...
Bill has definitely started this one off on the right foot.
{quote] "Obviously the flow of electrons and power cannot be controlled . . ."
. . . Hmm, i guess quoting doesn't work the same way anymore either . . .
Generally true, as power flow normally divides in inverse proportion to the...
Possible setting corruption, or, more likely, maladjustment in micro-processor based protection for the unit that tripped? System "bumps" are not all that uncommon, and generator protection settings may need subtle but important tweaks to reduce sensitivity and susceptibility to operating for...
The word should be "while" or "whilst," not "during."
I'm with Bill, provided this is an air-cooled machine; better to prevent condensation on insulation while shut down than monitor insulation integrity 24/7. Besides, although there may be ways of doing this, I cannot once in my...
Agreed, cranky, as well as the fact that where used in radial only systems and not networks, only a limited number of customers will be interrupted, and as long as a sufficient local inventory of pad-mounts and human resources and work equipment is maintained the duration of the interruption...
Here are related but tangential questions for OP:
[1] Are all valves motor operated with controls [and possibly even the power actuators themselves] located > 1 metre from any steam line?
[2] If there are hand-operated valves, is each provided with an extension to keep the operator > 1 m from...
