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Control.com member...Member Information and Posts by not_quite_nyquist
Title: power engineer
from the Forum department...When 2 out of 3 poles of the circuit breaker of a Generator are closed
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?
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
Looking for a transfer function for a solenoid valve which regulates the quantity of steam that is provided to a heat exchange coil
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
AC generator voltage,excitation current, voltage drop and power flow
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
Phase sequence identification in transformers
chandru, the phase sequence of the secondary will change in the same manner as the primary. ...
from the Forum department...Isochronous Load Sharing
This question concerns the isochronous load sharing operation of synchronous generators and the relation between their generated powers in this mode.
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
What is normal slip frequency for synchronization.
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
How to determine what value of PID output represents 100% of duty cycle of pulse generator?
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
What are the things to be checked before running a DG in parallel with a trafo.
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
PMSM Motor modelling from first principles...mechanical properties!
> Q1. What does the damping factor actually depend on physically? B would be the electrical...
from the Electrical department...pole position detection
how to calculate the pole position?
CSA, I like your explanation, but would take issue with one detail. The peak voltage actually...
from the Electrical department...Busbar Differential Protection
Busbar Differential protection for MV switchgear for 2 out of 3 (2/3) Incomer logic
> 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
Power Management System (CHP plant)
Daniel, I think CSA gave a great explanation of the general features, but I would argue that...
from the power systems department...Reactive power
Explanation of Reactive power
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
What is "cold air" as it relates to generator capability curves?
from the Forum department...Generator questions
using induction motor as grid tied generator
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
Looking for some sources and information about gas turbine governors
The western electric coordinating council (WECC) in the United States has developed at least one...
from the Forum department...Hydro-power generation in Africa
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.
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)
info on the blackouts in India
from the The Start of Another Brouhaha? department...The Physics of... Synchronizing Alternators
This thread covers the very simplistic case of synchronizing like-alternators, both of which are unloaded.
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
synchronization with grid when the turbine is in island mode and isochronous mode is selected?
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
What makes a generator coupled to a gas turbine increase load when load raise command is issued to Mark V
from the Forum department...Frequency oscillations due to load control
Our electrical system becomes unstable when we put generators on load control mode.
>(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
Why Speed of Synchronous Generator decrease with increasing speed?
Two things: Poles should never slip. If they do, you've got big problems. See GE's "Art and...
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Parts that positively cannot be assembled in improper order will be.