Voltage and Frequency Regulation (Grid, synchronous generation)

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Discussion Overview

The discussion revolves around the control of frequency and voltage in electrical grids, particularly focusing on the relationship between active power, frequency, and reactive power. Participants explore concepts related to synchronous generation and grid stability.

Discussion Character

  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant inquires about the relationship between active power and grid frequency, suggesting that frequency is linked to turbine speed and that changes in power demand affect generator speed.
  • Another participant states that an increase in demand causes the entire grid to slow down, indicating that all generators must synchronize to the same frequency in steady state.
  • A participant mentions the upcoming publication of a resource that may provide further insights into AC power analysis, which could clarify these concepts.

Areas of Agreement / Disagreement

Participants express varying levels of understanding regarding voltage control, while there is some agreement on the relationship between frequency and active power. However, the discussion does not reach a consensus on the mechanisms of voltage control.

Contextual Notes

Participants have not fully articulated their thoughts on voltage control, leaving some assumptions and definitions unclear. The discussion also references external resources that may influence understanding.

Who May Find This Useful

This discussion may be useful for individuals interested in electrical engineering, power systems, and the dynamics of grid operations.

LagCompensator
Messages
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Hi

I was wondering if someone could help me understand and explain to me how one can control the frequency of the grid from help of the active power (frequency -> power angle -> active power) and how reactive power can be used to control the voltage level.

My thoughts:
Voltage Control:
I don't have any clear thoughts.

Frequency Control:
The frequency of the generator is connected to how fast the turbine is rotating, so in order to keep close to constant frequency one has to change the input power to the turbine, so that the generator can speed up/down in order to stay at operating frequency.
(If the power demand increases the generator slows down, and if it decreases the generator speeds up.)

Thank you,

Best Regards
 
Engineering news on Phys.org
Read ac power analysis part 2, to be published today or tomorrow.
 
The quick answer is that if the demand increases, the entire grid slows down, until controls bring it back. Generators must all make the same frequency in the steady state.
 
Thank you, I'll read ac power analysis part 2 when it gets published.
 

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