Dear Muhammad,

short circuit power (nominal voltage times current under short circuit conditions) is an indirect measure of the serial impedance of the network (or, Thevenin impedance, to be more precise). By tendency: the lower the short circuit power, the higher the apparent serial impedance of the network, as seen from the node you've calculated the short circuit power for.

With sources of harmonics frequently infecting harmonic currents, not voltages, a higher apparent impedance means a higher voltage rise as a consequence of the injected current.

I hope this answer helps.

with best regards,

     Olav

Yes, I agree with Olav Krause. The lower the short circuit power, the higher the apparent serial impedance of the network. In consequence the higher the network impedance, the higher voltage when current is injected in the system.

Thank you all...Specially Olav Krause

SO Sir is this Same reason Why we have higher voltage Fluctuation in a Weaker Power System (one with low short Circuit Capacity)??

Actually I'm Asking it in context of Power Electronic Converters Supplied from Weaker Power System Create High Non-Characteristic Harmonics..

What type of power electronic equipment are you referring to?

Pulsed COnvertors (Rectifiers Primly )

If it is generation, then active power (MW) flows into the grid. How would your rectifier do that?

Burc Deleen...Well I dont think This is My Question.....Just assume  12 pulse Rectifier (3-phase) connected with a System having pure Sine voltage????Can you Tell me what harmonic order will be injected into system????

In that case (12-pulse rectifier load) you'll have 11th and 13th harmonics (major components) in the input current. The next pairs will be as per 12n+/- 1. Of course this assumes you have a pure fundamental input voltage, as you already stated.

What is your system configuration? You have told us that you have renewable generation, and also a rectifier connected to the power grid. My first thought would be that you had a system, first from the generation source, for example wind, which is rectified to a dc link, which supplies a PWM inverter, which is connected to the power grid.