Hi great fan yours. Thank u for sharing ur knowledge with the world...i wanted to know how to set Directional overcurrent and earth fault CHARACTERISTIC ANGLE ...please share..if you know...THANK YOU
Dear Sir, we cannot find a video in TH-cam on Large power plant Automatic Voltage Regulator working principle and Operation. Please make a video regarding this, so that it Will be helpful.
My dear friends, " I need your precious help" One question please , if we (1) Reduce the rpm of the Generator and if we (2) Increase the rpm of the Generator what changes we can see and how the Generator will perform with 100% load or 80% load is my question. ( 1) Increase in rpm :- If the Generator having 2 pole or 4 pole with single phase or 3 phase running on 100% load or 80% load with increased RPM from 1500 to 1800 rpm ( the Generator original design RPM is only 1500 ) if there is an increase of 300 RPM more than the original rpm what will happen , (2) Decrease in rpm :- If the Generator having 2 pole or 4 pole with single phase or 3 phase running on 100% load or 80% load with decreased RPM from 1500 to 1200 rpm ( the Generator original design RPM is only 1500 ) if there is an decrease of 300 RPM less than the original rpm what will happen , To correct this imbalance and mainten proper Hz , amps and volts what should be done or what is the best solution. Please give me the details, a humble request 🙏 kammagearflywheel@gmail.com Dr Srinivas Bhaskar Chaganti 91-8555045244
1. Low speed with excitation - overfluxing phenomenon will occur, protection present at both avr and Grp to trip the machine. Gen designed for a certain v/f ratio and if ratio exceeds that limit of manufacturer then machine may damage due to heating, Stator end is weakest zone during overfluxing. Load angle and MW will reduce instantly. Oscillations in mw may occur and governor will try to bring back to normal rpm. 2. If high rpm then chances of pole slip, heating due to eddy currents. Overfreq prot at Grp may act. Load angle and MW will increase instantly and oscillations may occur incase sufficient de accelaration torque present to control pole slip.
@@drsrinivasbhaskarchaganti3653 In my experience I have seen first line of action is control by speed governor and second line of action is initiating trip by protection system.
One question: When the rotor carrying dc field current rotates, it produces a rotating magnetic field. So is that rotating field moving relative to the rotor or is it moving with the rotor with zero relative speed between them?
can you plz explain why would class-B (or turbine trip )is initiated due to negative sequence overload.Because it is rotor of generator which is getting overheated due to negative sequence component not turbine.
hitchandan27 Rotor winding or stator winding both are classB, because overload withstand capacity (in time duration) is much higher than the time delay of generator isolation through classB trip
Point me if I am wrong ,but when ever is tripping is initiated because of fault in generator then it is termed as class-A trip .if trip is initiated to protect turbine then it is termed as class -B trip .
hitchandan27 Yes you are absolutely correct, But in some conditions where delay is possible we can trip the turbine from gen relay and gen will be isolated by pickup of low forward power protection in relay
Continue your work, most people get frustrated and stop in the middle with realizing they could be so much successful. You have a gift utilize it.
Thanks you very much.. Your service is much appreciated...Once again thank you
Nicely explained
Very nice explanation
Extremely thank full to you sir.
Very good 🙏🙏🙏🙏 Thanks
Hi great fan yours. Thank u for sharing ur knowledge with the world...i wanted to know how to set Directional overcurrent and earth fault CHARACTERISTIC ANGLE ...please share..if you know...THANK YOU
Dear Sir, we cannot find a video in TH-cam on Large power plant Automatic Voltage Regulator working principle and Operation. Please make a video regarding this, so that it Will be helpful.
Sir, Please upload a video regarding Class A & Class B Protection.
Plz Add some videos regarding class A, B, c protection of Generator,, and plz explain Pole slipping protection of Generator,,
dear sir, please make a vdo on AVR system working principle for a 660MW thermal power plant
Sir , I m missing u ..pls come back with new topic s
Sir eak videos for directional earth fault. Only fundamental
My dear friends, " I need your precious help"
One question please , if we (1) Reduce the rpm of the Generator and if we (2) Increase the rpm of the Generator what changes we can see and how the Generator will perform with 100% load or 80% load is my question.
( 1)
Increase in rpm :-
If the Generator having 2 pole or 4 pole with single phase or 3 phase running on 100% load or 80% load with increased RPM from 1500 to 1800 rpm ( the Generator original design RPM is only 1500 ) if there is an increase of 300 RPM more than the original rpm what will happen ,
(2)
Decrease in rpm :-
If the Generator having 2 pole or 4 pole with single phase or 3 phase running on 100% load or 80% load with decreased RPM from 1500 to 1200 rpm ( the Generator original design RPM is only 1500 ) if there is an decrease of 300 RPM less than the original rpm what will happen ,
To correct this imbalance and mainten proper Hz , amps and volts what should be done or what is the best solution.
Please give me the details, a humble request 🙏
kammagearflywheel@gmail.com
Dr Srinivas Bhaskar
Chaganti
91-8555045244
1. Low speed with excitation - overfluxing phenomenon will occur, protection present at both avr and Grp to trip the machine. Gen designed for a certain v/f ratio and if ratio exceeds that limit of manufacturer then machine may damage due to heating, Stator end is weakest zone during overfluxing. Load angle and MW will reduce instantly. Oscillations in mw may occur and governor will try to bring back to normal rpm.
2. If high rpm then chances of pole slip, heating due to eddy currents. Overfreq prot at Grp may act. Load angle and MW will increase instantly and oscillations may occur incase sufficient de accelaration torque present to control pole slip.
@@electrocean6684 dear friend , thanks , what is the best method to overcome the problem by using any additional attachment to solve the problem
@@drsrinivasbhaskarchaganti3653 In my experience I have seen first line of action is control by speed governor and second line of action is initiating trip by protection system.
Thank you Sir
Great job
thanks alot sir
One question: When the rotor carrying dc field current rotates, it produces a rotating magnetic field. So is that rotating field moving relative to the rotor or is it moving with the rotor with zero relative speed between them?
Rizwan Khan rotor magnetic field is aligned with the rotor but the resultant field will have different axis but relative speed is zero wrt rotor
So would that resultant field create back emf or self induced emf in the rotor?
Rizwan Khan " Induced"
can you plz explain why would class-B (or turbine trip )is initiated due to negative sequence overload.Because it is rotor of generator which is getting overheated due to negative sequence component not turbine.
hitchandan27
Rotor winding or stator winding both are classB, because overload withstand capacity (in time duration) is much higher than the time delay of generator isolation through classB trip
Point me if I am wrong ,but when ever is tripping is initiated because of fault in generator then it is termed as class-A trip .if trip is initiated to protect turbine then it is termed as class -B trip .
hitchandan27
Yes you are absolutely correct,
But in some conditions where delay is possible we can trip the turbine from gen relay and gen will be isolated by pickup of low forward power protection in relay
kindly upload classA,B & C protections
Upload class A and class B trip
Kindly upload new topic..
Thanks..