Wind power for self-consumption

[JEAN MARIE]

It is very difficult to know if we can install a private wind turbine whose production is entirely self-consumed by injection into the home network but without disconnecting from the EDF network.

The expected result is as follows:

The production of the wind turbine (or wind turbines) SLOWS the meter in the exact proportion of the current produced.

If the production of the wind turbine exceeds the instantaneous needs of the house, then the surplus is evacuated in another private circuit.

And when the production of the wind turbine slows down the meter, it is fully used, which means that the phase agreement with the network is impeccable.

Is this a dream or is it possible? we never have a clear answer from the wind power merchants, all of them without exception guide you towards reselling to EDF or I in no case want to resell anything to EDF or any other producer. Resale is always taxed in the long term, and above all, the resale price will never be revalued by popure and simple indexation on the selling price of electricity by EDF. Now this indexing would be the most basic honesty. (Photovoltaic producers are aware of this poor indexation of their buy-back prices, and hydroelectric power producers are also suffering terribly from this). )

[chatelot16]

Yes it's possible

but there are regulatory muddles that make it seem like it's forbidden

if there is a regulation system, reducing the power produced by the wind turbine, or deriving excess power in a large electric radiator, there will never be injection on the EDF network ... so it should not be prohibited

edf has no way of checking the wiring of what is in an individual ... so suffice it to say that the wind turbine is used only on a circuit isolated from the edf, for example for heating

and in reality the wind turbine injects on the network, with a heating system to consume the possible surplus, and not to send the power in pure loss in a meter which does not turn upside down

[Did67]

On condition all the same to "decouple", that is to say to have a system which cuts the injection as soon as the network is cut or which returns your production on your network by cutting the arrival of EdF [ work on the line; ERDF agents cut upstream of the works; if you inject downstream, it might surprise them].

All this in automatic, because you will not be notified.

[chatelot16]

it is the normal function of an injector in the network to cut if there is no more network!

it is not an additional function: it is the basic operation

the injector inverter does not have a sinusoidal generator at 50hz: it is controlled by the sinusoidal voltage already present: it is built to inject a current in phase with the present voltage

if the network is cut, the operation becomes unstable: the frequency has no chance of staying at 50hz: it stalls or it gets carried away ... just as the voltage goes up or down depending on the power supplied by the wind turbine

so it is enough that the injector inverter has a system which cuts everything as soon as the frequency or the voltage deviates from normal, to have no risk of making a dangerous injection in a cut network

it would be possible to make a dual-function inverter, to also make electricity independently in the event of a network outage, but a complete change of operating mode is required: the injector inverter currently available on the market no autonomous operating mode: it could be invented, because the power part of the inverter would remain the same

[Did67]

Yes I know.

But I like to recall this principle, for fear that a Boeotian plugs in a generator, a wind turbine, etc ...

[however, are all sounders necessarily "injectors", as you seem to say ??? There, i dont know ! But you surely]

[Did67]

the injector inverter does not have a sinusoidal generator at 50hz: it is controlled by the sinusoidal voltage already present: it is built to inject a current in phase with the present voltage

if the network is cut, the operation becomes unstable: the frequency has no chance of staying at 50hz: it stalls or it gets carried away ... just as the voltage goes up or down depending on the power supplied by the wind turbine

so it is enough that the injector inverter has a system which cuts everything as soon as the frequency or the voltage deviates from normal, to have no risk of making a dangerous injection in a cut network

OKAY. Understood.

It is therefore not as simple as Jean-Marie thought, it seems to me!

[chatelot16]

if it's simple!

a stand-alone inverter can only be used in stand-alone! if we connect it to a network, it goes instantly!

an injector inverter only works with a network, if the network is cut it no longer injects anything

inverter with dual operating mode, I do not know any currently available

there is only one inverter capable of automatically switching from an injector mode to an autonomous mode which could be dangerous for the EDF, but this is not a simple fault of an injector inverter: it is downright an additional function which is not likely to exist by surprise

[loop]

Bonjour,

The operating agreement with ERDF is a formality in principle compulsory if one wants to inject on the network, even domestic, but for very small powers, it is clearly dissuasive.
To be in the nails, at least with regard to the material used, the injection inverter must comply with standard VDE 0126-1-1.
This is the case of inverters used for photovoltaics, such as the SMA series SB, Solarmax etc ... but which require a DC input voltage of around 100 to 150V minimum.
For the small wind turbine, to my knowledge, only the WB 1100LV meets the standard. The mastervolt Windmaster does not meet this specification, it is necessary to add a decoupling device.
Last formula, the micro-inverter, which accepts between 14 and 50V DC as input, but of more limited AC power (250W maxi). Some micro-inverters have the particularity of being able to be powered by a 12 or 24VDC battery, without grilling them.

A+