Connecting Generators in Parallel for Hydro-power Plant

Click For Summary

Discussion Overview

The discussion revolves around the optimal method for connecting two generators in a hydro-power plant to the transmission line, specifically whether to connect them separately or in parallel before synchronization. The context includes considerations for transmission voltage, local supply needs, and protection schemes.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes connecting each generator separately to the transmission line and synchronizing them individually for better line protection schemes.
  • Another participant agrees with the idea of connecting separately, but raises the question of how to manage local 11 KV supply needs.
  • A third participant suggests the possibility of using a third transformer if local supply is needed, or alternatively paralleling the two generators directly from the 11 KV bus.
  • One participant reminds others that transformers can operate in both directions, implying that power can be drawn from the 132 KV side if one generator is down.

Areas of Agreement / Disagreement

Participants express differing views on the best approach to connect the generators, with no consensus reached on whether to connect separately or in parallel before synchronization.

Contextual Notes

Considerations include the need for local supply, the implications of transformer operation, and the potential impact on line protection schemes. Specific assumptions regarding system configurations and operational requirements remain unaddressed.

I_am_learning
Messages
681
Reaction score
16
Suppose in a hyro-power plant, there are two generators, G1 and G2 of 11KV output voltage.
The Transmission Voltage is 132KV. There are 2 11 Kv/132 Kv transformers.
So, should we connect each generator separately to the Transmission line and synchronize individually OR should we first connect both generators in parallel (at 11 KV bus bar) and synchronize them before connecting to the grid.
Whats better?
 
Engineering news on Phys.org
I'm thinking the former in order to do line protection schemes.
 
I was also thinking like that.
But If You also need to have Local 11 KV supply, then do you use a third 132KV/11KV transformer Or Would You directly tap-off from 11 KV Bus by paralleling two generators ?
 
Remember that transformers work in both directions. When one unit is down, power could be taken from the 132KV side.
 

Similar threads

Synchronous generator on an infinite bus
  • · Replies 37 ·
2
Replies
37
Views
8K
What Is the Ground in a Power Plant Schematic?
  • · Replies 5 ·
Replies
5
Views
2K
How do I properly connect a bench power supply to a pulse generator for testing?
  • · Replies 19 ·
Replies
19
Views
3K
AC generator output voltage to grid question
  • · Replies 4 ·
Replies
4
Views
3K
Self excited induction generators and grid connected solar inverters?
  • · Replies 9 ·
Replies
9
Views
2K
Generator load sharing
  • · Replies 4 ·
Replies
4
Views
2K
Can Two RF Signal Sources Connected in Parallel Increase Signal Amplitude?
  • · Replies 16 ·
Replies
16
Views
3K
How to get maximal power output from solar panels in reality
  • · Replies 11 ·
Replies
11
Views
2K
Switching between parallel and series connections (solar)
  • · Replies 31 ·
2
Replies
31
Views
5K
Power plant generator improvement
  • · Replies 20 ·
Replies
20
Views
3K