wind control without battery

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fredkymco
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by fredkymco » 13/03/11, 12:47

hello and thank you for your answer and information
1: I will reconfigure my inverter (modify the operating ranges)
2: after measuring at the output of the regulator, I realized that I have a frequency of +/- 300 Hz so I will readjust the voltage
DC (diode bridge not the top)
3: rebuild a regulation (Chinese electronics blah)
but how with a small PLC or threshold relays (voltage control and amperage)

"everywhere I collect information, I have never seen an installation where the problem has been solved 100% but where are the engineers"
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atelier52
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1000w wind turbine without batteries




by atelier52 » 15/03/11, 23:43

Good evening,
I'm like you, I have a 2kw swg not yet on the way for lack of means to finish it. but it will come.
having known several professionals in the field, they are more attracted by the greed and know nothing about it.
you will have to rely only on yourself with the help of the net to adapt it to your needs.

in your Chinese regulator, get the diode bridge and connect it to the three wires of your generator. normally you don't need to filter to smooth the direct voltage, your inverter takes care of it, it has capacities on its inputs.

I am attaching a diagram to limit the voltage peaks and avoid the runaway of the wind turbine. if connoisseur in electronics goes through it to refine the diagram in case, because I do not follow expert, but it gives a basis. it kicks in from 57v since your inverter accepts max 60v.
where there is marked (stop) put a switch to stop the wind turbine.
the load resistors must be at 6 ohms and be able to hold 600w or 1800w for the three. to avoid buying this untraceable model, simply wind the 316l stainless steel welding wire diameter 1mm. the length is to be calculated. to wind the resistance, put a round iron in a drill and go (be careful with your hands, it is better to be accompanied).
Here for tonight

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Forhorse
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by Forhorse » 16/03/11, 08:28

I did not simulate the diagram to verify that it is good. The principle seems correct to me, maybe lacking a potentiometer to more finely adjust the threshold.
On the other hand I have a doubt on the choice of the MOSFET, the IRL3915 is given for a VDS of 55V, so hey, if we put 57V to him he will not like : Cheesy:
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atelier52
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by atelier52 » 16/03/11, 08:57

I did not pay too much attention to the choice of the nmos, it will be defined according to what its seller can give it.

it is true that r2 can be replaced by a 20k trimer.

thank you Forhorse for these fixes
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Forhorse
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by Forhorse » 16/03/11, 09:50

Ah and it didn't jump right in my eyes, but Q2 of your push-pull is upside down (reverse E and C)
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atelier52
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by atelier52 » 16/03/11, 17:51

Good evening,
small corrections on the diagram on the Forhorse advice.
like what there is more idea in two heads than in one
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fredkymco
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by fredkymco » 16/03/11, 21:16

good evening i will order the components and test that
Thanks a lot for your help
I will keep you posted on the results
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atelier52
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by atelier52 » 18/03/11, 07:21

Hello,

fredkymco, by the way, there just wouldn't be a way to change your existing regulation, changing a component here or there to change the trigger points.
if you could send pictures inside the box and seen above and below the electronic plate.
before ordering components to make an assembly which is perhaps of the same kind.
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Forhorse
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by Forhorse » 18/03/11, 08:26

Serious regulation is still based on a PWM generally controlled by a small algo PID (which I am in the process of developing)
So even if the power electronics will certainly be very identical to what you have proposed, the order is probably different.

What you are proposing is functional, but it is a bit "brutal", being neither more nor less than a big "crowbar"; perfectly suited to what is asked of it (protect the inverter and the wind turbine in the event of an overvoltage) but not so much for finely regulating a voltage.
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atelier52
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by atelier52 » 18/03/11, 10:02

it is clear that the diagram I have attached is slightly blunt. moreover at the time of load shedding the voltage drop of the generator causes an astable cycle of the rather random assembly. I did simulations and it turns out that I did not find a simple solution to master the problem. so either the assembly is done like the one presented in the previous post and it is brutal. or it is another more complex assembly perhaps not within the reach of fredkymco in the immediate future.

(I am also in court for a pwm regulation on my side but it will not be for immediately because my case is more complex.
the nacelle of my wind turbine is motorized so it is managed by a wind vane, an anemometer, the speed of the rotor and by this load for alignment or the curtain in relation to the wind.
my generator is 110ac to charge a 550ah 12v battery pack so I use a slaved switching power supply to charge the batteries. and a pwm load shedding on resistors for safety, but all this little world is closely linked because there is no question of leaving the wind turbine running when the batteries are charged. )
This is not the subject, each case is unique in wind power and there is no simple solution because each component of the installation is different for everyone.
I would say that solar is a little easier because it is not dangerous questions on voltage and no moving parts. solar has fewer parameters to manage.
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