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Member Information and Posts by not_quite_nyquist
Title: power engineer
Originally posted by Santanu Das on 13 April, 2013 - 11:04 am
What will happen when 2 out of 3 poles of a 220 kv circuit breaker of a 330MVA Generator (of a steam power plant) is closed and one open when the generator (via GT) is connected (or synchronized)with 220kv bus?
New Replies:
Santanu Das, The answer to this is complicated to explain in words. The simple, but not...
from the Forum department...
Transfer Function of a Solenoid Valve
Originally posted by Declan Flynn on 25 March, 2013 - 11:58 am
Looking for a transfer function for a solenoid valve which regulates the quantity of steam that is provided to a heat exchange coil
New Replies:
Sebastian is right... i should have double checked my logic and math before i submitted that one......
Declan, The easiest way is to assume that the model just involves a simple time constant....
from the Forum department...
Synchronous Generator Voltage
Originally posted by Rudy on 12 February, 2013 - 11:50 am
AC generator voltage,excitation current, voltage drop and power flow
New Replies:
Bruce has a great answer, but try and start with this concept: Apparent power (we'll label it S)...
from the Electrical department...
Phase Sequence in Transformers
Originally posted by chandru on 17 January, 2013 - 5:18 am
Phase sequence identification in transformers
New Replies:
chandru, the phase sequence of the secondary will change in the same manner as the primary. ...
from the Forum department...
Originally posted by sam on 8 January, 2013 - 5:10 pm
This question concerns the isochronous load sharing operation of synchronous generators and the relation between their generated powers in this mode.
New Replies:
sam, I think what your equation is getting at is that the scheme is implemented based on each...
from the Synchronization department...
Normal Slip Speed
Originally posted by MWO on 3 January, 2013 - 9:57 pm
What is normal slip frequency for synchronization.
New Replies:
I think what MWO is asking is (MWO, correct me if i'm wrong): should the Mark VI 100% speed setting...
MWO, The 700G uses the generator terminal voltage to determine the frequency of the generator,...
from the Forum department...
PID regulator output
Originally posted by John Smith on 27 December, 2012 - 11:56 am
How to determine what value of PID output represents 100% of duty cycle of pulse generator?
New Replies:
John Smith, I'm assuming that you are using a pulse width modulation type control for the fan....
from the electrical department...
Generator in parallel with transformer
Originally posted by sangeetha on 19 December, 2012 - 10:44 pm
What are the things to be checked before running a DG in parallel with a trafo.
New Replies:
Phil Corso, No disrespect taken. I agree that proper system design would make load shedding...
Sangeetha, How much load does the UAT normally supply? The basic theory is that once the UAT...
Phil Corso, I respectfully disagree. I have designed, installed and commissioned several of...
sangeetha, This is a classic application for a fast load shedding system. Depending on what...
from the Model based tuning department...
PMSM Control
Originally posted by Dapo on 19 November, 2012 - 3:55 pm
PMSM Motor modelling from first principles...mechanical properties!
New Replies:
> Q1. What does the damping factor actually depend on physically? B would be the electrical...
from the Electrical department...
pole position detection
Originally posted by chandru on 30 October, 2012 - 11:43 pm
how to calculate the pole position?
New Replies:
CSA, I like your explanation, but would take issue with one detail. The peak voltage actually...
from the Electrical department...
Busbar Differential Protection
Originally posted by Pal on 24 October, 2012 - 4:36 am
Busbar Differential protection for MV switchgear for 2 out of 3 (2/3) Incomer logic
New Replies:
> Case -2 > Incomers-1 ON ,Incomer -2 OFF & Buscopler -ON > 1) what will happen if...
from the C&I department...
PMS - Load Shedding - AGC - AVR
Originally posted by Daniel Chamorro on 16 October, 2012 - 9:39 am
Power Management System (CHP plant)
New Replies:
Daniel, I think CSA gave a great explanation of the general features, but I would argue that...
from the power systems department...
Reactive power
Originally posted by Anonymous on 13 August, 2007 - 12:26 pm
Explanation of Reactive power
New Replies:
Ryan, The lagging is due to the properties of the inductor. The relationship between the current...
from the seldom explained department...
Generator Cold Air rating
Posted by nic on 16 August, 2012 - 5:21 pm
What is "cold air" as it relates to generator capability curves?
from the Forum department...
Generator questions
Originally posted by dg1953 on 11 August, 2012 - 8:56 am
using induction motor as grid tied generator
New Replies:
That is interesting. They are relying on the rotor being magnetized from previous operation. It's...
Mark, Even with capacitors, there would be no source of magnetizing current without the...
from the Maintenance department...
Gas Turbine Governors
Originally posted by Edriss on 3 August, 2012 - 6:21 pm
Looking for some sources and information about gas turbine governors
New Replies:
The western electric coordinating council (WECC) in the United States has developed at least one...
from the Forum department...
Hydro-power generation in Africa
Originally posted by Mark Klee on 2 August, 2012 - 4:19 am
I'm trying to determine the amount of electricity that can be practically generated from a stream of water on the top of our property.
New Replies:
Is that a 700m drop over 5 miles? Are you diverting the stream or are you piping the water? Could...
from the Gossip for nerds department...
India Blackout(s)
Posted by nic on 31 July, 2012 - 8:17 pm
info on the blackouts in India
from the The Start of Another Brouhaha? department...
The Physics of... Synchronizing Alternators
Originally posted by Phil Corso on 14 May, 2010 - 5:10 pm
This thread covers the very simplistic case of synchronizing like-alternators, both of which are unloaded.
New Replies:
Phil, I think some of these statements are a bit misleading, at least for me: > 2. Their...
from the engineering department...
synchronization with grid in island mode
Originally posted by shakarami on 3 July, 2012 - 5:03 pm
synchronization with grid when the turbine is in island mode and isochronous mode is selected?
New Replies:
MIKEVI, I've developed and installed synchronizers that can synchronize a group of generators on...
from the Automation List department...
What makes a generator increase load
Originally posted by kumarash on 10 August, 2008 - 3:49 pm
What makes a generator coupled to a gas turbine increase load when load raise command is issued to Mark V
New Replies:
Could you define Mload and GG...
from the Forum department...
Frequency oscillations due to load control
Originally posted by Dani on 23 October, 2010 - 2:01 pm
Our electrical system becomes unstable when we put generators on load control mode.
New Replies:
>(as opposed to a droop control which is purely proportional) Minor quibble: I would disagree...
I know this is an old post, but the moderator rejected the new post that I tried to start......
from the Forum department...
Speed of Synchronous Generator
Originally posted by Muhammad Salman on 26 February, 2010 - 4:08 pm
Why Speed of Synchronous Generator decrease with increasing speed?
New Replies:
Two things: Poles should never slip. If they do, you've got big problems. See GE's "Art and...
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