Why Is Isolated Neutral Preferred In Some Generators?

  • Thread starter Thread starter SteamTurbine
  • Start date Start date
  • Tags Tags
    Generators Neutral
AI Thread Summary
Isolated neutral is preferred in some generators to minimize the risk of ground faults and to enhance system stability during synchronization. Grounding practices are crucial for managing unbalanced loads and short circuit conditions, which can affect generator performance. The discussion highlights the need to evaluate the grounding of existing and new generators in relation to synchronization requirements. The neutral of the gas turbine should be un-earthed to align with the addition of the new steam turbine, which requires earthing. Understanding these conditions is vital for maintaining system integrity and operational safety.
SteamTurbine
Messages
1
Reaction score
0
Dear engineers,

I need your help in analyzing this query:

Our plant consists of 11x 635 KW, 415V Waukesha gensets, 2 x 3.5MW,11KV wartsila gensets, 11 KV main bus for synchronization & 10 MW,11KV, 50 Hz gas turbine. The neutral of gas turbine is earthed against the manufacturers recommendations.

Now, a 2.7MV, 11KV, 50 Hz steam Turbine is being added to the system whose neutral is recommended to be earthed. but before taking this action the Neutral of existing Gas Turbine is to be un-earthed.

So, Under which conditions the Neutral of a generator should be earthed & what are the conditions when "isolated neutral" is recommended?

I am not asking from manufacturer's point of view but I am simply asking from synchronization point of view. Any questions will be welcomed!

THANKING IN ADVANCE :)
 
Engineering news on Phys.org
Huh? I can't think of any connection to synchronization.

Grounding practices have to do with unbalanced loads, and especially short circuit conditions.
 

Thread '3-terminal device external modeling'

Very basic question. Consider a 3-terminal device with terminals say A,B,C. Kirchhoff Current Law (KCL) and Kirchhoff Voltage Law (KVL) establish two relationships between the 3 currents entering the terminals and the 3 terminal's voltage pairs respectively. So we have 2 equations in 6 unknowns. To proceed further we need two more (independent) equations in order to solve the circuit the 3-terminal device is connected to (basically one treats such a device as an unbalanced two-port...
View full post »

Thread 'Two capacitors, etc.'

suppose you have two capacitors with a 0.1 Farad value and 12 VDC rating. label these as A and B. label the terminals of each as 1 and 2. you also have a voltmeter with a 40 volt linear range for DC. you also have a 9 volt DC power supply fed by mains. you charge each capacitor to 9 volts with terminal 1 being - (negative) and terminal 2 being + (positive). you connect the voltmeter to terminal A2 and to terminal B1. does it read any voltage? can - of one capacitor discharge + of the...
View full post »

Similar threads

Why the fascination with intermittent renewable energy sources?
Replies
35
Views
7K
Why is the U-2 nicknamed the Dragon Lady?
Replies
4
Views
8K

Hot Threads

Recent Insights

Back
Top