All Questions
Tagged with energy power-engineering
12
questions
0
votes
1
answer
41
views
RF power transmission control in U-blox GSM modules
I am using the SARA-U270 GSM module and want to test energy-saving techniques. One technique I would like to try is power transmission control, adjusting the transmission power in dBm based on the ...
- 179
2
votes
2
answers
93
views
Power and energy of pumped hydro versus grid scale batteries
A company is proposing a pumped hydro system where they state on their website as “capable of producing up to 335 MW of electricity with around 8 hours storage”.
The same company is proposing a ...
- 21
2
votes
4
answers
165
views
Matching generation and consumption in renewables
To balance power generation and consumption, traditional power plants such as thermal and hydro have governors that regulate the steam/water that flows into the turbine.
The energy that renewables ...
- 91
0
votes
1
answer
115
views
How to (theoretically) capture 59 megajoules of power in 5 seconds to store like a battery for a month? [closed]
On Dec 21, 2021 EUROfusion Scientists in Culham, UK produced 59 megajoules in 5 sustained seconds from their nuclear fusion experiment.
What theoretically would be required to capture that energy and ...
- 11
3
votes
1
answer
118
views
How does the grid handle small deviations of power consumption when most of load is regulated?
This is a continuation of this question. Suppose we have a grid which distributes say one gigawatt total power and all this power is perfectly fully consumed by electrical devices.
However all ...
- 12.5k
0
votes
0
answers
59
views
NEPLAN Load Flow Analysis with 1-day measurement
currently I am working on a project to identify energy loses in an electrical network. I am using NEPLAN 10, and already build a small system and implemented measurements. As soon as start the ...
- 1
33
votes
6
answers
14k
views
What is the speed of "electricity"?
In a distribution grid, what is the speed of
energy
signal
Is it strictly the same?
And how is synchronisation achieved? Is an electric grid essentially an orchestra where everyone is the chief ...
- 531
6
votes
3
answers
600
views
Producers consumers balance in the grid
In a large distribution grid, it is said that consumers and producers must be in balance; what that means physically, in correct (not simplistic) mathematical formulation, is not clear: perfect ...
- 531
3
votes
4
answers
915
views
Is there a minimum amount of electricity that can be fed back into the grid? [closed]
This is not fully related to electrical engineering, but I have been reading lately about Feed-in-Tariffs and solar energy production and I cannot find any information on the amount of energy that can ...
- 193
4
votes
2
answers
8k
views
In the USA, the grid transmits power at/around 60Hz. How big of a frequency deviation can the grid handle before relays trip and cause a blackout?
I understand that small frequency deviations will result in automatic load shedding or other control actions to restore system frequency, but when does a blackout occur? When the deviation exceeds + ...
- 41
3
votes
2
answers
528
views
How do I, as a consumer, gain or lose when the utility company line voltage varies from rated value?
A little background; the line voltage supplied here in my part of India varies as a function of the load. At dusk, the measured value is as high as 248V. Household appliances are rated at either 220V, ...
- 3,011
3
votes
3
answers
271
views
How exactly does the grid handle small deviations in power consumption?
I've heard many times that the grid electricity production and consumption must be balanced and imbalances lead to overvoltage or undervoltage. I've never seen an explanation of that phenomena from ...
- 12.5k