design harmonic filter bank for new factory

[manh_hoa09]

We are building a new steel factory. we want to design a hamonic filter bank for this factory. But we don't know parameters which need for designing. Please tell me what about soft ware is used for designing.  plz help us

[rejhan karaman]

It is very hard to explain it to you briefly.

First of all there is no software that can automatically carry out a calculation of reactive power compensation.

The most important of parameters are:

1) in which the voltage level of compensation is done.

2) what kind of compensation you want. (for your factory is better to dynamic reactive power compensation with thyristors.)

3) which type of electrical consumers is necessary to compensate.

4) single-pole electric scheme of the plant (factory).

 

So I am at you complete disposal for any additional help and questions.

Regards,

Rejhan.

[Spir Georges GHALI]

Dear ;

 

Adding to the parameters of Mr. Reihan, I want to add the following :

As it's a new factory, you have 2 possibilities :

– If the factory is just running, you can mesure the Harmonics that you have, then will decide whcich harminocs should be eliminated by Filters.

– If the factory is not running yet, you should know for each harmonics generator products the ” Harmonics Spectrum ” that you can obtain from the products' producers, then you will have a good idea about the hamonics & their levels once the factory runs, then will decide whcich harminocs should be eliminated by Filters

 

in all cas, you should absolutly know the harmonics and their levels to decide what you should be done, because in some cases where the levels of some harmonics are low, we can do nothing for them as the costs of filters wre heigh or veru heigh depending on the current level's of each hamonics shold be eliminated.

 

regards.

 

Spir Georges GHALI

[Alen Matanovic]

rejhan karaman said:

It is very hard to explain it to you briefly.

First of all there is no software that can automatically carry out a calculation of reactive power compensation.

The most important of parameters are:

1) in which the voltage level of compensation is done.

2) what kind of compensation you want. (for your factory is better to dynamic reactive power compensation with thyristors.)

3) which type of electrical consumers is necessary to compensate.

4) single-pole electric scheme of the plant (factory).

 

So I am at you complete disposal for any additional help and questions.

Regards,

Rejhan.

---

Hello Rejhan,, are You actually from serbia or? Can I write to you in croatian??

However,, for the benefit of others – let's keep conversation in english :)..

I see you're into subject, so I'd like to ask you few questions :).. First,, what is the simpliest way to calculate reactive power request of the loads? Specially if we have various types of nonlinear loads, such as ASD (or VFD) motors, Computer/Office equipment and Fluorescent lighting – and if their distorted current spectrum is known..

Also, how much do you know about NOTCH (LC) harmonic filters,, and can you suggest some materials/books/papers on their calculation?

I'm doing some harmonic analysis using EasyPower software (don't know if You ever heard of it) and I'm expiriencing some problems regarding calculation of these LC filters.. Since I supposed that this programme don't recognize the differences between load characters (i.e. capacitive, inductive),, I simply added their kVAr powers to gain total reactive power that needs to be compensated.. Once knowing that, it's simple to calculate the inductance for inductor in filter to get resonant frequency of problematic harmonic – using Thompson relation.. And another thing,, all loads are three-phase since this programme has no single-line option.. So as all calculations are for three-phase 400V..

Thank You in advance,, and feel free to contact me also over mail, or facebook if you like ;)..

Regards/Pozdrav,, Alen..

[admin]

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