Does it help the power grid if a consumer places equal load on all phases?
Here, someone describes an inverter that ensures that all three three-phase phases of his house connection carry the same current. He did this by feeding more power into phase 1 when the washing machine on phase 1 was heating up…
Or does an "unbalanced load" balance itself out due to the large number of consumers? So, up to the transformer at the next voltage level… the average current…
A woman who installed an inverter here last year for feeding into the grid and for self-supply said that the grid voltage is now "nicer"… Side question : What could he have meant? Did they mean that we're compensating for distortions caused by our neighbors? Or that we don't have unbalanced loads?
(No Ratings Yet)
Loading...
Yes, up to the power plant level, the slate load must in any case be largely compensated because otherwise the generators are damaged.
Larger consumers should definitely decrease the performance evenly in three phases.
However, it is not possible to take too many thoughts because many consumers are connected in single phase in the household and thus generate a slate load during operation. In total, this is the ideal way to the next network level.
Otherwise, as already noted, there are also possibilities for compensation on the net side. They then catch the slate load again. However, they have one thing in common: it will consume additional power (and ultimately more) that will also end up with the electricity customer via relocations. It is therefore in the interest of all to distribute the load as well as possible to the three phases.
The following question: The mains voltage will always be “more beautiful” than that generated by an inverter. This is due to the fact that harmonics are already generated here, which are ultimately disturbances and can also interfere with the network. But don’t worry: this also happens during the operation of appropriate consumers on the normal network; Except that energy is lost here, nothing happens badly.
real? I’ve been gracious about the fact that the simply dents in the sine vibration of the voltage fill or suck with their great inverter or at least do not make even bigger…
So there’s nothing like that?
There are (for companies) corresponding products that compensate for these harmonics and thus provide low power consumption from the network.
For private use, this is not lucrative.
An inverter cannot do this, quite the contrary.
Damage can’t, but try to get this. You won’t succeed.
why can’t you use totally independent PWM’s and transformers?
It has an advantage if there is no slate load in the system. In particular, the neutral conductor currents are then small.
However, Idr captures the electrical installation or cabling that already, so if you are intelligently cabling the consumers in a house, the load is usually even relatively balanced and idR is sometimes also moving away to the transformer.
Transformers on the low-voltage plane can, for example, also symmetricize slate loads to some extent due to the zig-zag circuit.
At the latest in the generator, however, the load should be quite symmetrical, because a strong slate load here leads to higher losses and this loads the generator more strongly.
On the whole, this is not a pure yes no question but a cost benefit question.
In general, slate loads are of course a problem, but there are also possibilities for which to be suppressed relatively well at the end.
It has nothing to do with distortions or the like, that is a different subject.
In fact, it should be that no matter whether you feed a three-phase current or only an alternating voltage, in the network this is due to the assignment – as with the consumers – that actually compensates itself within the scope of the permitted differences. If there is a statistically detected random problem, similar to that when you dice enough often, you dice each number equally often.
In most plants and processes, where not all are running in the same run, this is actually the case.
For example, it was so – if you used to take off the phone tube, you have almost 100% always got a free sign, although 10 connections were connected to a pre-selector and the pre-select, which controls the caller itself rotating, was then connected to a heb rotation selector (HDW) for the first digit to be selected, which was selected from 10 free lines to the next HDW the first free one and then the second one could be selected. The last two digits are then both controlled, because there you have to meet exactly the right line to reach the desired participant. Today, although all this works electronically, the principle is similar to the distribution and allocation.
A high load leads to frequency shifts in the range of a few tenths of Hertz.
The EVU can also control how many generators and how much power is fed in. Thus, an unequal load would lead to the need to feed more in one phase and less in the other phase. This can only be achieved by additional compensation and regulations.
But this is very complex and only roughly explained.
A uniform load is also in the interest of the suppliers, but by the many different consumers, this is also usually the case.
ok… so you can see a slate load in the local network at your own home port? but then only hard to fight?
relieves the neutral conductor (zero conductor)
Because on average the phase load is already balanced.
when the centre conductor
as little as it goes,
then the power supply becomes more stable.
No matter what power source you should have.
But if a washing machine or whatever,
a few hours running,
that every good inverter will intercept.
The electrician meant that the phase position and the potential of the N conductors,
in an inverter, always deviates from the general power grid.
Hansi
the power grid helps the uniform load little. Surely the lines that have to conduct the greatest current will be warmer, but that should be insignificant.
It looks different in the power plant.
In such displacements, the generators run unround.
Until the rotor destroys the generator.
and does not the slate load continue to the power plant? or will they be compensated for by a few houses because the electrician stuck the washing machine to another phase?
The power plant does not notice this because the circuit is already ensured that a uniform load is produced. For megawatts, some kW is not problematic.
A load of the power grid as uniform as possible is naturally indispensable. However, our three-phase power grid is surprisingly tiltable. So what he is doing is a nice service, but not necessarily necessary.