Questions about solar and wind regulators

[loop]

Hello everyone,

Mach, great achievement!
Nice to find you on the forum after such a long time.
But such a beautiful baby takes time to develop.

Mastervolt and SMA did not persevere in the development of the wind turbine mppt and preferred to let the user calibrate the curve. It is an acceptable technical choice, but leaves the user some uncertainty.

For the septic of the mppt in wind, I let you watch the following video (quite old).

http://www.youtube.com/watch?v=45eP1fhFhbo

A+

[loop]

Bonjour,

could this regulator work after rectification and filtering (condo) of the current produced by the generator ???

in fact, what is the difference between a solar reg reg and a wind reg (apart from the rectifier / filter part and the load shedding)?

The algorithm of the mppt regulators is globally the same whether in PV or in wind.
A fairly clear explanation of how it works here:

http://fr.wikipedia.org/wiki/Maximum_power_point_tracker

or here

http://sites-final.uclouvain.be/e-lee/FR/realisations/EnergiesRenouvelables/FiliereSolaire/MPPT/MPPT/Principes.htm

Contrary to what has been written in some previous posts, the regulator measures the value of I but controls U and calculates P.
The intensity is the result of the choice of the input voltage and not the reverse.

The application in wind power amounts to letting the speed of rotation "run" (therefore the voltage rises), and to check that the power increases.

In ascending power curve (progressive increase in sunshine or wind), in my opinion, a PV or wind regulator are equal. At worst, if the voltage does not rise fast enough because of the reaction time of the microprocessor, there will be stalling of the blades.

On a downward curve (less sun or weakening of the wind), the intensity will drop quickly because U is high for a low power -> in this specific case the regulator must react quickly otherwise the propeller becomes a fan and we lose the theoretically recoverable energy. This is where good material will fare better.

Having observed the functioning of my Windmax1000 (link to the video in my previous post), we can see that a control and piloting time of P and U every 0.5 sec is suitable for small wind turbines (no instability observed )

The simplest in the case of Mach, it is to simulate increases and decreases of input power with a PV, by masking certain cells, and to observe the tension controlled by the regulator mppt.
In my opinion, this will be the most telling in terms of the regulator's performance.

A+

[dedeleco]

looping is too optimistic for a power regulation system, quickly complex with a wind turbine, which enters into unstable oscillations easily, if we are not lucky that looping !!

Read the same much more detailed link in English:
http://en.wikipedia.org/wiki/Maximum_po ... t_tracking

who finds the general problem of any regulation, summarized by chatelot16 and observed by many with faulty operations with poor performance, and unstable oscillations between slow and fast, typical, linked to incompatible time constants and not foreseen or adjustable in mppt:

The perturb and observe method can produce oscillations of power output around the maximum power point even under steady state illumination.

the power regulation method, UI, R, derivative measurement, etc. does not change much, faced with the inertia of the wind turbine.

See the test of a wind turbine in link on econology, that the manufacturer of the wind turbine does not seem to have solved, and those who have this problem on econology also with poor performance much lower than the theoretical forecasts !!

[chatelot16]

I am not saying that an MPPT cannot work on wind turbines: I am just saying that this MPPT must be exactly developed for a precise wind turbine

with photovoltaics, it's simpler: the panels all have exactly the same behavior: it is therefore easy to make an MPPT which works on the first try on any panel

wind turbines behave very differently from one model to another

[dedeleco]

Basic link to read for solar, which shows that the special solar mppt is different from wind.

http://www.wseas.us/e-library/transacti ... 27-545.pdf

[dedeleco]

mppt achievements articles to study:

http://www.tuc.gr/fileadmin/users_data/ ... s/J.33.pdf

http://cdn.intechweb.org/pdfs/14807.pdf

http://perc.polyu.edu.hk/APEJ/APEJ/Volu ... paper2.pdf

http://www.eecs.ucf.edu/seniordesign/fa ... c_rev1.pdf

http://www.aseanenergy.info/Abstract/33005489.pdf

http://aryuanto.files.wordpress.com/2008/10/e2-41.pdf

http://catspaw.its.queensu.ca/bitstream ... asters.pdf

http://ir.lib.ntust.edu.tw/bitstream/98 ... ontrol.pdf

[swallowtail]

hello everyone and Loop

thank you for these very many infos.
I think I will test the P&O method as Loop did with its windmaster and have the same luck?
Precisions: in your tests (video) your current coming from the gen was rectified, but was it more filtered (condo), and could you adjust the freq of measurement of the reg mppt?

please
swallowtail

[loop]

Hi Mach,

We continue the conversation in MP.

Too bad for sharing info but it makes me drunk to be confronted with pseudo-experts who have never done anything or tested and to impress you send you back to work ...... others .

Personally, I have something else to do than spend 24 hours a day in front of my PC trying to denigrate the experimenters who come to the forum for "fun" and not out of frustration.

A+

[dedeleco]

The scientific method is to read and study what many others have already done instead of going for it by ignoring this extensive work, falsely deciding that they are "pseudo-experts who have never done or tested anything", for , ignorant, wasting time trying to reinvent what is well known, which frightens me about econology, disease of those who despise the knowledge of thousands of researchers and technicians:

mppt achievements articles to study:

http://www.tuc.gr/fileadmin/users_data/ ... s/J.33.pdf

http://cdn.intechweb.org/pdfs/14807.pdf

http://perc.polyu.edu.hk/APEJ/APEJ/Volu ... paper2.pdf

http://www.eecs.ucf.edu/seniordesign/fa ... c_rev1.pdf

http://www.aseanenergy.info/Abstract/33005489.pdf

http://aryuanto.files.wordpress.com/2008/10/e2-41.pdf

http://catspaw.its.queensu.ca/bitstream ... asters.pdf

http://ir.lib.ntust.edu.tw/bitstream/98 ... ontrol.pdf

etc.....

Buying equipment with narrow, incomprehensible, absurd instructions, without the minimum clear information necessary is absurd and doomed to failure often, as clearly visible on econology !!

It is simpler to order a converter, by writing a good coherent, logical, clear, adapted, modifiable and effective program (what I can do), but it is necessary to make the effort to learn the past works (like me) , instead of despising them, in an absurd hatred of science !!!

[swallowtail]

good evening everyone,
polemical absurd to my taste because for my part the 2 approaches are valid.
The scientific for those who master the theoretical knowledge but who are sometimes far from the technical constraints of the realization, and the practical approach (for more "manual") which is more experimental and "marvelous" but which sometimes reveals surprising results allowing to revise some theories of the first cited .....

drawing an airplane is good, building it is a lot, trying it out is all ..... (dixit I don't know who ??)

there are always more ideas in two heads than in one.
so I take all the ideas ...
do