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I may have missed it, but is there an assumption regarding negative sequence impedance for the transformer and would this apply to all unbalanced fault studies?
Hi, Thank you for the informative video. When you made the assumption where +ve, -ve & 0 seq impedance to be the same, does that mean that the generator & the transformer are assumed to be solidly grounded star windings only?
Thank you for all your videos. Just one question, is there any explaination to why Kilo and Mega are being used without any form of conversion, First was when calculating the Base impendance (Yes! just as a base, I could understand, cause it is just being used as a refference), but when calculating the short circuit impedance of the Generator, the voltage is in KV while the Apparent power is in Mva, here I would need a good reson to understand. Thank you in advance.
Kilo = 10^3 ; M = 10^6 Z(or)R = V^2/P ; (10^3)^2/10^6 = 10^6/10^6 = 1 Voltage is in (Kilo) Volts; Power is in (Mega) Volt Amperes V^2/P = (Volt)^2/(Volt*Amp) = volt/Amp = ohm
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Hi Farhan, the transformer was already provided in the question so there was no need to divide it with base value. Hope you find it useful. Best Regards, GeneralPAC by AllumiaX
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YEAR-END SALE: Up to 95% OFF: bit.ly/power-systems-courses
As 2023 comes to an end, it's time to take a breather and reflect on your journey this year. This isn't just about recognizing your wins and bumps in the road-it's also an opportunity to identify areas for growth, particularly in your learning goals. Lucky for you, our BIG END-OF-YEAR SALE is here to support you in achieving Your goals!
Really well done and easy to comprehend. Thank you.
Thank you for the videos you offered. I have a question about a program you used as a black board when you teaching. what is the program name?
I may have missed it, but is there an assumption regarding negative sequence impedance for the transformer and would this apply to all unbalanced fault studies?
how did we get j0.10 pu, we nvr solved anything
Isn't it because pu is 10%?
Hi, Thank you for the informative video. When you made the assumption where +ve, -ve & 0 seq impedance to be the same, does that mean that the generator & the transformer are assumed to be solidly grounded star windings only?
Thank you for all your videos. Just one question, is there any explaination to why Kilo and Mega are being used without any form of conversion, First was when calculating the Base impendance (Yes! just as a base, I could understand, cause it is just being used as a refference), but when calculating the short circuit impedance of the Generator, the voltage is in KV while the Apparent power is in Mva, here I would need a good reson to understand. Thank you in advance.
Kilo = 10^3 ; M = 10^6
Z(or)R = V^2/P ;
(10^3)^2/10^6 = 10^6/10^6 = 1
Voltage is in (Kilo) Volts; Power is in (Mega) Volt Amperes
V^2/P = (Volt)^2/(Volt*Amp) = volt/Amp = ohm
try this: (115*1000)^2V / (30*1000000) VA = 440.83 OHM
Support us by becoming our patron at patreon.com/generalpac ....Why?
An incredible amount of time and effort is needed to develop high-quality video tutorials. Each video takes approximately 10 hours to complete which includes learning the concept ourselves, brainstorming creative ways to teach and explain the concepts, writing the script, audio recording, video recording, and editing. This is why Hundreds-of-Thousands of people have watched, liked, subscribed, and left positive comments.
how p.u values for transformer taken as 0.1 i dont get it
never mind i got it.
Why Transformer P.U takes as 0.10. Why not 0.10/440.83 ??
Hi Farhan, the transformer was already provided in the question so there was no need to divide it with base value.
Hope you find it useful.
Best Regards,
GeneralPAC by AllumiaX
🎁 Enter the Thanksgiving Power System Pack Giveaway with your email! 🍀 One lucky winner will receive the Power System Fundamental Pack on November 23rd, and ALL participants get a FREE top-selling course. 📚
Sign in: bit.ly/thanksgiving-day-2023
98% OFF | EARLYBIRDS DISCOUNT
Sign up for our newly launched courses at 98% OFF. New video releases will be scheduled on a monthly basis. Grab this opportunity before it ends. bit.ly/earlybirds-discount
Strange network; generator 115 kV nominal voltage and line at 13 kV.