SVC Design

[crazyelectrical]

Does anybody know how to decide the number of branches in a SVC?

The question is to design a SVC using TSC and TCR for smooth control say around -100 to 400 mvar connected to a 345 kv bus via a transformer of suitable size. Kindly help! I really dont know where and how to start!

Also, how to design filter for the same and perform loss calculations?

Thanks!

 

[davidbeach]

You could probably start by defining your TLAs.

aka - TLA = Three Letter Acronym

 

[crazyelectrical]

Static VAR compensator, its very urgent, i have to submit report this week!!

 

[waross]

One down. Two to go.
Hint. Do you have a target PF envelope? (TPFE) If all else fails you can use a WAG solution.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[crazyelectrical]

I have been asked to design a solution employing an SVC which uses a Thyristor Controlled Reactor and Thyristor Switched Capacitance.

The Req. control for voltage is 0.95 pu-1.05 pu..
Also filters for 5th and 7th harmonics are needed. Smooth control over -150 inductive to 400 capacitive with maximum switching of 150 mvar possible.

I know how to achieve smooth but there are multiple techniques.

Does anybody know a definite way of doing this?

 

[davidbeach]

Is this for school?

 

[crazyelectrical]

Nope, i'm working on a project.

 

[crazyelectrical]

Its integrating wind energy into the grid in western US without disturbing reliability and stability of the grid!

 

[waross]

Minimum KVAR steps may be influenced by the smallest readily available capacitors.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[crazyelectrical]

I was personally thinking of having one TCR of 550 mvar and four 100 mvar capacitive which switch in giving it a smooth control.
The place where im stuck is the filter and whether the capacitor branches are acceptable.

 

[anksyete]

It is necessary to follow these steps for SVC, FC part design:

1.Defining load profile
2.Harmonic analysis of the load
3.Harmonic Analysis of TCR part

ABB and some others have fixed harmonic portions according to application.

 

[Skogsgurra]

With all your questions, you need someone else to do this for you. Did your boss ask you to finish it this week? You need another boss.

It is a big project and nothing you shall do without having any experience at all. Ask ABB, they have done hundreds and hundreds SVCs.

Gunnar Englund

http://www.gke.org

--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

 

[QBplanner]

Define a SVC takes half a year to one year to getinto specification stage. You need another boss.