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1. What does the acronym CAES stand for according to the DOE/EPRI electricity storage handbook?
Compressed air energy storage
2. What is a benefit of electricity storage service?
All of the above
3. Operation of an electric grid requires reserve capacity that can be called upon when normal electric supply resources become unexpectedly unavailable. Which Reserve would provide the fastest response to outages?
Supplemental Reserve – Generation that can pick up load within one hour. Its role is, essentially, a backup for spinning and non-spinning reserves. Backup supply may also be used as backup for commercial energy sales. Unlike spinning reserve capacity, supplemental reserve capacity is not synchronized with grid frequency. Supplemental reserves are used after all spinning reserves are online.
4. ________ is a response to changes in system frequency, timeline loading, or the relation of these to each other that occurs as needed to maintain the scheduled system frequency.
Output Variation is a response to changes in system frequency, timeline loading, or the relation of these to each other that occurs as needed to maintain the scheduled system frequency.
5. True or False. Storage systems provide unique services to the evolving energy grid.
True, Storage systems provide unique services to the evolving energy grid.
6. To manage reactance at the grid level, ____ need ______ to offset reactive effects so the transmission system can be operated in a stable manner.
To manage reactance at the grid level, System operators need voltage support resources to offset reactive effects so the transmission system can be operated in a stable manner.
7. The size of storage systems to be used in frequency response mode is ____ to the grid or balancing area in which they are needed.
The size of storage systems to be used in frequency response mode is Proportional to the grid or balancing area in which they are needed.
8. ________ involves using storage to delay or avoid investments.
Distribution upgrade deferral involves using storage to delay or avoid investments.
9. What are some manifestations of poor power quality?
All of the above
10. Energy storage used for transmission support improves the transmission system performance by compensating for electrical anomalies and disturbances. What are these anomalies or disturbances?
All of the above
11. What increases load-carrying capacity by improving dynamic stability?
Transmission Stability Damping: Increase load-carrying capacity by improving dynamic stability.
12. What is transmission congestion?
Transmission congestion occurs when available, least-cost energy cannot be delivered to all or some loads because transmission facilities are not adequate to deliver that energy.
13. True or False. In market areas, when charging storage for load following, the energy stored must be purchased at the prevailing wholesale price.
True. In market areas, when charging storage for load following, the energy stored must be purchased at the prevailing wholesale price.
14. How is load following characterized?
Load following is characterized by power output that generally changes as frequently as every several minutes. The output changes in response to the changing balance between electric supply and load within a specific region or area. Output variation is a response to changes in system frequency, timeline loading, or the relation of these to each other that occurs as needed to maintain the scheduled system frequency and/or established interchange with other areas within predetermined limits.
15. Electricity storage can be used by end users (i.e., utility customers) to reduce their overall costs for electric service by?
Electricity storage can be used by end users (i.e., utility customers) to reduce their overall costs for electric service by, Increasing their demand during peak periods
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