Lecture 4 – Flexibility Concepts for Electric Energy Supply Flashcards
What is a residual load?
Residual load refers to the difference between the total electricity demand on a power grid and the electricity supplied by variable renewable energy sources, such as wind and solar, that are subject to fluctuations in their output due to weather conditions. In other words, it is the amount of electricity that needs to be supplied by dispatchable power sources, such as fossil fuel power plants or energy storage systems, to meet the remaining demand after accounting for the variable renewable energy generation.
Residual load is an important concept in the context of energy systems with high penetration of renewable energy sources, as it can help determine the flexibility and reliability of the grid. When renewable energy generation exceeds the electricity demand, the residual load may be negative, meaning there is excess electricity that can be fed back into the grid or stored for later use. On the other hand, when electricity demand exceeds renewable energy generation, the residual load is positive, and additional dispatchable power sources may need to be activated to meet the demand.
Managing residual load is a key challenge in transitioning to a more renewable energy-based power system, as it requires balancing variable generation with flexible and dispatchable sources to ensure a reliable electricity supply. It often involves a combination of energy storage, demand-side management, and grid infrastructure upgrades to accommodate the changing dynamics of renewable energy generation and demand fluctuations.
Modelling Flexibilizy Technolgies
Which Flexibilty Providers did we learn?
- Chemicel Energy Based Plants
- Themal Plants with Storage
- Storage
1. Pumped Hzdro
2. Gas Storage
3. Batterie
4. DemandSideManagement - Power to X
1. Power to Heat
2. Power to Hzdrogen - FRE Curtailment
What is Demand Side Managemnt?
DSM means not to save Energy but to shift it. So charging the electrical vehicle not right now but in a later time point when Energy is more avaliable.
What is the CO2 intensity of Biomass?
In sustainable biomass production, the CO2 emissions associated with harvesting, processing, and transportation are typically considered part of a natural carbon cycle and not counted as net emissions.
