Evaluating rotational inertia as a component of grid reliability with high penetrations of variable renewable energy
| Autor: | Joshua D. Rhodes, Michael E. Webber, Samuel C. Johnson, Thomas A. Deetjen, Dimitri J. Papageorgiou, Dharik S. Mallapragada |
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| Rok vydání: | 2019 |
| Předmět: |
020209 energy
media_common.quotation_subject 02 engineering and technology Inertia Industrial and Manufacturing Engineering Automotive engineering Variable renewable energy Power system simulation 020401 chemical engineering 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Electrical and Electronic Engineering Civil and Structural Engineering media_common business.industry Mechanical Engineering Building and Construction Nuclear power Moment of inertia Grid Pollution Renewable energy General Energy Electricity generation Environmental science business |
| Zdroj: | Energy. 180:258-271 |
| ISSN: | 0360-5442 |
| Popis: | Growth of electricity generation from variable renewable resources like wind and solar has raised questions about future grid stability. This paper used several renewable energy penetration scenarios to determine when an electric grid might be more vulnerable to frequency contingencies, such as a generator outage. Unit commitment and dispatch modeling was used to quantify system inertia, an established proxy for grid stability. A case study of the Electric Reliability Council of Texas grid was used to illustrate the method. Results from the modeled scenarios showed that the Texas grid is resilient to major grid changes, even with relatively high penetrations ( ∼ 30% of annual energy generation compared to 18% in 2017) of renewable energy. However, retiring nuclear power plants and private-use networks in the model led to unstable inertia levels in our results. When the system inertia was constrained to meet a minimum threshold in our model, multiple coal and natural gas combined-cycle plants were dispatched at part-load or at their minimum operating level to maintain stable system inertia levels. This behavior is expected to expand with higher renewable energy penetrations and could occur on other electric grids that are reliant on synchronous generators for inertia support. |
| Databáze: | OpenAIRE |
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