Iberien Peninsular Blackout

Many sources in the last 24 hours quoting a Spanish government report, e.g. this from Reuters, but no link to the actual government report.  Has anyone found this?

Paul Adkins

Redesign future wind turbines to run AC at 3000/N revs would much improve stability in UK. 

Entirely sensible for hydropower where we control the flow. Harder for wind, as I am not sure what you intend to do to the climate to ensure a constant wind speed over time !! 

Truly synchronous wind turbines would have a very narrow range of wind-speeds with high efficiency.

Long term I think the solutions will come and will involve power electronics and more telemetry.

Mike

for reassurance, look here www.neso.energy/.../reactive-power-market

Thanks for that link. Looking there & finding 

Publicly Available 1 Voltage Technical Requirements and Specification

and 

Publicly Available Stability Technical Requirements and Specification

Is actually only partly re-assuring - the  circulating current problems of waveform quality (things that are really not simple sine-waves) and phase shift are not separated, indeed reactive power is purely considered in terms of the fundamental frequency, with no mention of harmonic content
e.g.
" Reactive Power The product of voltage and current and the sine of the phase angle between them measured in units of voltamperes reactive"

For now, its good that it is being discussed but the technical language is still that of a traditional rotating grid where changes in frequency are synonymous with a load response...

An inverter based system need not present any RoCoF with load, or indeed you could design it to give a negative one, if you like.

Mike.

Electrical energy per cycle, is a volume of rotating Magnoflux inertia with voltage at right angles to current and both at quadrature to the flux or a Cosine quantum reduction will occur as VAR's.

Not sure how above Equation 1  helps resolve the problem of cubic volume synchronisation ?

Hello Clive:

What has "quantum" effects have to do with this situation?

Peter Brooks

Palm Bay FL   

I think Clive said Quadrature rather than Quantum...

   - Andy,

the guided photons have a very low individual energy and long autocorrelation function, and I don't see a virtual particle model as a very helpful way to describe wht e we have here either. I think voltages between things and currents flowing through things is the more applicable model. We just need to be very clear what we are correcting for.

Mike.

the guided photons have a very low individual energy and long autocorrelation function, and I don't see a virtual particle model as a very helpful way to describe what  we have here either. I think voltages between things and currents flowing through things is the more easily applicable model.
We just need to be very clear what we ought to be sensing and correcting for. Voltage and current Sines/ cosines shifted in the manner of KVAr are one form of correction required, flow reversals mid cycle to maintain a sine-wave shape from non sine-wave generators are quite another.

Certainly where I am now has lots of IT kit and lots of LED lights, and the voltage is quite trapezoidal. Not as bad as the experimental waveform shown here but getting on that way.

Mike.

Mike,

Just thought of an interesting experiment.

If we charge up a large capacitor then set up magnets at right angles across it; could we then AC vibrate the flux/current energy out of the capacitor somehow?

There are a several  devices that rely on moving charges about in crossed magnetic and electric fields. 

A capacitor carrying an AC behaves very much as an extension of the conductor that supplies it, and if you organize a current transformer around the dielectric you will see the same current - this "(charge) displacement" current that represents the periodic reversal of the E and D fields is what we make use of in radio antennas. 

The whole process is reciprocal, so one should be able to place the capacitor with a wire emerging at each end,  into the eye of a toroidal transformer and induce a current to flow in it, with a virtual AC voltage source in series with it. There is no free lunch though, as soon as you allow current to flow and do work, the impedance of the transformer primary will fall and consume energy from the exciting circuit.

Mike.

There are a several  devices that rely on moving charges about in crossed magnetic and electric fields. 

A capacitor carrying an AC behaves very much as an extension of the conductor that supplies it, and if you organize a current transformer around the dielectric you will see the same current - this "(charge) displacement" current that represents the periodic reversal of the E and D fields is what we make use of in radio antennas. 

The whole process is reciprocal, so one should be able to place the capacitor with a wire emerging at each end,  into the eye of a toroidal transformer and induce a current to flow in it, with a virtual AC voltage source in series with it. There is no free lunch though, as soon as you allow current to flow and do work, the impedance of the transformer primary will fall and consume energy from the exciting circuit.

Mike.