Lec 02 Reactance Diagram

Subject : Power System (Crash Course)
Faculty : Mr. Sohail Ansari Sir
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[@simplenima4060]

Sir I watched your lecture during day time and now at 00:59 I try to solve PU problems of IES questions and I am stunned that I did it all pu problems. Actually I was going to sleep n while checking KZbin I saw your face and could not slepp and I started practicing problems. Thank You so much sir.Allah aapko bahut bahut height par lekar jaye.yehi mera duwa hai.

[@eswarnaik49]

Jai Shree Ram 🙏🙏🙏

[@arvindrawat6425]

Kash India ke sare teachers aap ke jaise ho jaye to India ka level study or education me , World me top no.1 ho jayega. Excellent!Beautiful!Perfect! Amazing.

[@angadkarna]

Sir I'm from tamilnadu becoz of u I started learning Hindi .thank u

[@keerthanamageshwaran9076]

Me also 😋

[@Yk-hj2qh]

I am from Maharashtra

[@cbsuresh5631]

One shot 2 birds!

[@aparshambharkar508]

You are a true guru sir. You are sharing your precious knowledge on this platform. God Bless you Sir!!

[@anupapatel4691]

Lockdown me bahut achha channel Mila sir Thank you so much sir ji

[@monstergroupindia5826]

bhot short main kaafi bada topic clear kiya hai aapne . kamaal hai sir

[@HaiderAli-lm1ur]

sir you are soo good MA , i passed many courses with A grade just watching your video , ALLAH G ap ko kamyab kryn

[@narangtallar7294]

Sir, i got some doubts. At 06:02 we use 30MVA for T1 where as at 15:12 we took 15MVA for T1. Why is that sir?

[@bharaths9479]

Ur teaching style is very impressive Sir, great effort, it's very much useful to so many students. It's a great social service for those who are not able to pay for tutorials. May god bless you Sir. Thank u sooooooo much. Eagerly waiting for more videos.

[@someshrewadkar3899]

THANK YOU SIR!🙏 कल मेरा power sustemका exam है. मुझे per unit बोहोत मिश्किल जा रहा था पर आपका वीडियो देख कर सब समज मे आ गया 😀❤😃

[@sohailjanjua123]

Salam , Excellent lecture . Thanks Sohail from USA

[@shivanjali_6527]

No doubt, the lecture was awesome. It cleared all of my concepts.

[@nilanjansarkar7598]

Sir, You are great. I understand each and every line in your lecture.

[@GeniqueEducationTeam]

Most welcome.. do share this lecture with others so that they can also get benefit from this lecture.. all the best

[@sairafaiz8241]

Really really appreciate this vedio ...I can't be able to understand the concept but due to this vedio ...now I solved all questions easily ... Thank u sooo much sir ...

[@atulpathania7588]

Sir app Mahan haa 🙏🙏

[@HarpreetKaur-fl4ed]

Hi Sohail Sir. What an amazing lectures. You are blessed. I have only one exam to write here in Canada to get my Professional Engineering License. Starting study after 20 years of degree is not easy, but your lectures made it so much easier for me. Thanks to you million time.

[@pavan1685]

Thanks sir...aap concept pr dhyan dete hai to bohot easy tarike se smj me aa jata hai..you are great sir..I wish my college sir was like you..to clear all doubts..

[@professor_DJ_010]

best lecture of the topic reactance diagram. thnx a lot sir. ab khud se prblm solve hone lag rhe he

[@vishvasprajapati8685]

Concept clear ho gaya sir 🙏

[@uddhavsurve2974]

Sir if transmission line is connected in Delta, then will the formula change? As in the 1/3 factor you mentioned earlier..

[@shajigeorge7483]

No

[@krishsharma557]

Bro start delta concept used in transformer not in Transmission line .

[@uddhavsurve2974]

@@krishsharma557 It has been a long time since I asked this doubt, but thanks for replying!

[@zulfiquarali6205]

Delta connection is for transformer i think the formula will be used for transformer only

[@employmentalerts7602]

I thought the old MVA should be 30 for all the conversions since the old pu values calculated using 30 mva as base. Its not clear to me. Pls hlp

[@adilsaiyad3684]

Same problem muje bhi hui he

[@RizwanKhan_99]

@@adilsaiyad3684 same here bro

[@piyushnandurdikar9234]

True, it should be 30.

[@deeznuts-pf2lv]

@@adilsaiyad3684 both are separate questions. In the first question we are given actual (ohmic) values and have to calculate pu values on common base. In the second question we are given pu values calculated on individual base and have to calculate pu values on common base. So in second question the old base MVA would be the MVA of each individual element.

[@deeznuts-pf2lv]

@@RizwanKhan_99 both are separate questions. In the first question we are given actual (ohmic) values and have to calculate pu values on common base. In the second question we are given pu values calculated on individual base and have to calculate pu values on common base. So in the second question the old base MVA would be the MVA of each individual element.

[@ITTECHSPOT]

Dear Sir, Please start a lecture series on Power System Protection. Its request.

[@RizwanKhan_99]

@@curiosity2180 han sab bekar teacher hyn bro

[@someshrewadkar3899]

@@curiosity2180 🤣🤣

[@RaviSingh-kx6lf]

really sir your lectures are very helpfull for all.

[@adityarajiv6346]

Thanks a lot sir!!

[@toxicmind6790]

the best explanation ever... May god bless you sir. You are really awesome ...Love u sir

[@dasanikitha5941]

Thank you very much dear sir... 😊

[@nayankarmakarofficial6294]

Before watch your video p.u system was my fear, after complete watching p.u system become my dear.

[@debasisparida3056]

Excellent!!! pranam sir!!! thanks a lot!!!

[@santhoshkumarpatel2916]

Sir the base voltage is changed w. R to transformer sides ri8 but I actually thought that the base values are considered to be same throughout the line of the given network.. the solution is ok when we consider the base value of voltage as ll kv for the whole system...

[@sanjuthakur7221]

all doubts are clear...thanku so much sir

[@pradeepchandravanshi6684]

Yaa

[@Yogesh123mahwa]

hiii

[@divyanshsati1116]

Thank you so much sir, for this series!

[@jonnlagaddarajesh1357]

Dear sir, Please help me of the 1) Base voltage is always same of the give base voltage at 15:25. 2) Why we are compare the new MVA and old MVA .) 3) How to find the reactance of motor or transformer, generator

[@DelwarHossain-gg3jk]

Helpful for all eee

[@shaikabdulrazakmiah3988]

Can you please confirm that pu value lies between 0-1 then you explained in 2nd problem j1.68

[@vanshishgarg8763]

Sir are you referring a Y-Y transformer in 1st question?

[@electriclearner3093]

30 MVA and why 11 kv base value as we are changing it according to TL.or step up volt?

[@syedasad4436]

Sir there is a question, What if two different Generators with different mva and kva ratings are feeding a busbar then how could we find the p.u value of the generator 2 if we take the first generators ratings as our base

[@abhishektiger496]

Sir ji,for Transformer ,find Xpu by use actual data, then use X pu =Xpu old, now find Xpu new by use CHOOSEN BASE VALUE, MUST BE SAME ,M I RIGHT OR NOT

[@jayantpramanik515]

If we are taking 33kv while calculating Xpu of transformer how does it go with 30MVA and 11kV base??

[@NitishKumar-if2rv]

Sir u have said that always take phase values for calculating pu but in case of T1 as hv side value is given and if it is power transformer then it's winding will be like star-delta so HV side is Delta means if we are taking line values we have to divide by 3 according to formula derived in previous lecture.If the configuration is star I don't have any confusion as either we take line values ratio or phase values

[@vanshishgarg8763]

I think sir is assuming Y-Y connection there.

[@ATC_ShubhamK]

reactance values are already given in per phase

[@soumyasil7352]

Sir, at the time of calculate of P. U of transformer 1 then why we use the MVA rating 30MVA , where the transformer MVA rating is given... please explain..

[@surendrakverma555]

Very good lecture. Thanks

[@manitamta4159]

Sir I've a doubt... Generator, transformers and transmission line rated power is 30 hence we r taking 30MVA as base... BT the motor load has a rating of 25 MVA shouldn't we be taking 25 MVA as base power... 30MVA and 11 kV should've been taken when we are converting each element in terms of common base of power and voltage.. I.e [x(new)/x(old)....formula which u taught in previous video]

[@naitikgandhi269]

I also have the same doubt Please tell me if you got it solved.. @mani singh

[@kupendrar]

Sir, this is the calculation considering single bay,how do you draw the equivalent circuit when we you have 2 or more bays in the SLD?

[@zulfiquarali6205]

Sohail Bhai Prophet Muhammed SAW poori insaniyat k liye rehmat ban kar aaye the aur aap Electrical Engineering k liye rehmat ban kar aaye hain. Allah aapi mehnat qabool farmaye

[@tutorialsec5239]

sir while caluclating per unit impedence of generator in the first question u are dividing MVA and KVA square why is their no 10^ -2 present their

[@refreshingmindASMR]

All doubt regarding PU cleared. Thank u sir.

[@AbhishekKumar-ln7kq]

Sir if transformer confration is star and delta then base voltage will change as same as there phase voltage or line voltage of transforrmer

[@Varun-vi2vw]

If we not taking base value 11 kv Then What is the mean of base value

[@1998muza]

Sir Why did you put E at an angle of +delta

[@bhupendrateriya7630]

Very good explanation

[@sudhirsharma3435]

I think there is no meaning to write initially 11 kv as base kv. Its creating confusion. Simply we can consider the base mva and take the base kva of each component separately as it will change in each component how its connected to previous voltage.

[@deeznuts-pf2lv]

How have you connected 25MVA motor to 15MVA transformer?

[@foramrachchh4541]

Sir.. really great video...!

[@vivek11dec1982]

Sir...case 1 me base MVA 30 liya h sab jagah...but case 2 me jab old MVA put Kiya to alag alag kyu Kiya???

[@RizwanKhan_99]

same question i have

[@amirirfan6613]

Thank u sir .....toooo much

[@aryannishad130]

very nice sir...mja aa gya pura confusion khtm

[@shriyamsingh5446]

In first question , Is both transformer are star connected?

[@Jack-fs3ih]

it would've been much better if you took base kv and mva values completely different from the given values cause im still in doubt...great teaching tho

[@antidepression1259]

sir what about connection diagram of transformers. as per formula it is star-star

[@aradhanaroy3361]

Awsome sir

[@anupapatel4691]

Very nice

[@udaymehta8917]

bohot sare confusion clear ho gye.... thank you sir

[@manishchetiwal1811]

thank you sir

[@shyamusriofficial6376]

Sir how get 30KV base value for transformer

[@hhhhh-dj8bp]

Sir please it example on star delta transformer pu while drawing reactance diagram

[@jitendrasinghbhadoriya153]

Per unit concept covered successfully .... Sixer on 1st ball 😀

[@thosetwoyears1885]

Just amazing sir

[@AanmoneySakib]

hello sir, what will happen if the base voltage is taken 33 kilo volt at generator site ? will it change to 3*33=99 KV High Voltage side of transformer i.e. transmission line?

[@deeznuts-pf2lv]

transformer is not operated at more than rated voltage.

[@mohanvarri7439]

Sir transformer 2 nd side 33kv but you take old value as 11kv ....

[@skfiroz904]

sir base MVA rating is taken 30 in each case but base voltage changes in each case? why MVA is constant in each case but base voltage changes?

[@sandeepdhola]

in case 2 problem how u know that base value of t2 pu reactance is 15mva and 11kv

[@piyushmehar128]

In case #1 We assumed base MVA is 30MVA for all (G,T1,T2,M, T.L). Then why in Case#2 we take different old MVA for G,T1,T2,M,T.L. to find new per unit reactance value. Why we can't take same 30 MVA as old value for all equipment. Please answer. Please help.

[@successismine9891]

Cuz in new case the voltage and reactance will be new too

[@ayushjain7758]

Sari confusion 26.11 minute me clear kr di sir

[@GeniqueEducationTeam]

most welcome..

[@ajoydas724]

Why base voltage change but base Power not change .... even transformer and generator have different power rating

[@Light_The_King]

Bestttttt ❤❤❤❤

[@adilsaiyad3684]

30 MVA as old lena he har jagah ? But apne T1 and T2 ke liye 15MVA liya , M ke liye 25MVA liya .. esa kyu ?

[@vkclasseskota9543]

Sir 11/11 I understood but how 33/33 I can't understood because new base voltage is always 11 sir plz clarify my confusion

[@electriclearner3093]

Correct pls doubt clear karo

[@shwethak6895]

For transformer we have two sides that is HV and LV side so either side u can calculate that is the reason sir took like that , (KV)base oh HV side = ((KV)base on LV side )*(HV volatge rating /LV voletage rating ) . This is the actual formula similarly it can be found for (KV)base on LV side too.

[@maruf7552]

Love from Bangladesh ♥♥♥

[@vvenky3612]

Plz classes are conducted in English..

[@ebrahim-jx]

सच में सर इलेक्ट्रिकल इंजीनियर लेके मेरे को बहुत पछतावा हो रहा है पिछले 2 साल से मेरा यह सब्जेक्ट एग्जामिनेशन में क्लियर ही नहीं हो रहा है यह कंसेप्ट भी समझ नहीं आ रहा और दिमाग में कुछ घूस नहीं रहा😢😢😢

[@paliwalsisters]

3rd case is really awesome ☺️☺️☺️

[@GeniqueEducationTeam]

Keep studying and Do share with others.. all the best

[@mahendrameher3522]

Sir, when u r calculating pu value of T1, there is no use of 11kv as base value. That means for any base value of voltage pu value will not change. Sir Plz explain me why we can't aplly new pu value from old pu value formula here?

[@mahendrameher3522]

My doubt at time 6:20

[@santoshsaini8608]

Acha chlo suno... Currently gen ki base value 11kv li, to transformer step up krk 33kv de rha h. (Transformation ratio of transformer = 33/11 = 3) Ab let's say tumne base vaule gen ki 10kv krdi then at primary voltage of transformer 10kv hoga and secondary pr 30kv hoga(transformer ka transformation ratio is constant) Now calc pu value of transformer at hv side. 16 ohm * (30MVA/ 30kV^2) = 0.53 pu It's clear that pu value changes as base is changed. I hope it's clear now .

[@mahendrameher3522]

@@santoshsaini8608 thanks..

[@manjunathbs7746]

Hi sir... While calculating per unit in case 1...for transformer u assumed base mva as 30....but I'm case 2&3 u assumed base mva as 15...why please explain

[@GeniqueEducationTeam]

i think u have not watched the previous lecture..both have difference formula..see it again.

[@manjunathbs7746]

Thanks alot sir...I have noted it Yes in case 1 formula is mva & kv are rated...in other case it's new and old

[@GeniqueEducationTeam]

@@manjunathbs7746 right

[@gayatriatchi3661]

@@manjunathbs7746 I too have same doubt. Pls can u clear me. I didn't understand

[@parassharma2996]

Thanks sir Sir Case 3 se Gate me previous year questions aaye h ??? Koi mila nhi h muje toh Thanks once again for ur superb explaination of Case 3

[@GeniqueEducationTeam]

padh lo..aa skte hai..usse tough question nahi banega reactance diagram me.

[@keerthanamageshwaran9076]

@@GeniqueEducationTeam sir don't we want to consider the last tansmission line kah reactance value?! Pls clear my doubt

[@juweleee8923]

voltage rating of Xmer is given in line to line voltage but for calculating base voltage for different region how we will calculate that ....

[@GeniqueEducationTeam]

u have to take line voltage only..also it depends on winding of xmer..so by taking star winding u can go through like this..for more detail you can watch lec 01 in which i explained the pu concept.

[@ajay-dp2si]

Sir plz 3 phase me pu value nikalna btaye

[@arvindrawat6425]

Good morning, sir

[@poonampoo2016]

good explanation

[@SahidulIslam-pg3em]

Power system book er exercise solution pdf kaha pe paunga?

[@sivarlayellaiah5829]

sir plz classes are conducted in english

[@rushabhshukla1900]

all doubts are clear thank you very much sir

[@GeniqueEducationTeam]

most welcome..share this with others too..all the best.

[@abhichakraborty9257]

Nice sr

[@anandpal6741]

Sir plz reply me....per unit reactance in steady state kya hota ....??is it positive sequence reactance???

[@shwethak6895]

Yes since impedance and reactance daigrams are also called as positive sequence daigram

[@mowliidy8654]

Sir explain the leason in english

[@surajrawat9645]

Thanks

[@hemasundar8111]

Why power is constant throught calculation

[@dhrupadsaha4171]

Crystal clear :D

[@AlokSingh19903]

means that base voltage is variable?

[@electriclearner3093]

I have same doubt

[@hnyuvraj3504]

I’m from Bangladesh

[@shaneefh926]

reactance in ohm,in transformer 2 primary side is 33 but u took 11 why?