energy storage and transmission Flashcards
(40 cards)
Electricity is often converted to other forms of energy because:
a. It’s easier to see
b. It can’t be stored easily
c. It’s too dangerous to store
d. It’s always cheaper to convert
b. It can’t be stored easily
Renewable energy sources like solar and wind need energy storage because:
a. They are always expensive
b. They produce energy all the time
c. They depend on weather and are not always available
d. They are too powerful
c. They depend on weather and are not always available
Which type of energy is generally harder to convert into other forms?
a. Electrical energy
b. Mechanical energy
c. Thermal energy
d. Chemical energy
c. Thermal energy
Storing solar energy to use at night is an example of:
a. Power quality
b. Utility shaping
c. Automative applications
d. Distributed grid technologies
b. Utility shaping
What is main purpose of “power quality” applications?
a. To store energy for a long periods
b. To keep power steady and prevent outages
c. To power electric cars
d. To generate energy at home
b. To keep power steady and prevent outages
Electric vehicles use energy storage to:
a. Make roads smoother
b. Power the vehicle when it’s moving
c. Make the car lighter
d. Cool the engine
b. Power the vehicle when it’s moving
What is “energy transmission”?
a. Making energy at home
b. Moving energy from where it’s made to where it’s used
c. Storing energy for later
d. Using energy in car
b. Moving energy from where it’s made to where it’s used
What are the “distributed resources”?
a. Energy sources located far from cities
b. Energy sources located at the edges of the grid, near users
c. Old, unused power plants
d. Very large power plants
b. Energy sources located at the edges of the grid, near users
What is the benefit of “advance composite conductors”?
a. They make power lines heavier
b. They make power lines stronger and lighter
c. They make power lines more visible
d. They make power lines more expensive
b. They make power lines stronger and lighter
What is the main reason for energy storage in “Variations in Demand”?
a. To make energy more expensive
b. To balance energy use between high and low demand times.
c. To increase power outages.
d. To make power transmission harder
b. To balance energy use between high and low demand times
What is the relationship between energy density and system size in energy storage technologies?
a. Higher energy density usually means larger system size
b. Energy density is not affected by system size but directly impacts efficiency
c. Larger systems tend to have better energy density and specific energy due to economies of scale
d. Energy density is irrelevant for systems intended for utility-scale application
c. Larger systems tend to have better energy density and specific energy due to economies of scale
What is the primary role of demand response and energy management systems?
a. To audit power bills for accuracy
b. To delay appliance restart after blackout events
c. To manage peak loads and reduce electricity costs
d. To switch feeders between multiple supply points
c. To manage peak loads and reduce electricity costs
What is the main reason why pumped hydro storage systems require large areas and significant terrain modification?
a. Their need for modular installation and rapid scalability
b. They require significant elevation differences or underground caverns to operate efficiently
c. They are designed to have a very low footprint to minimize land use
d. They are highly modular and can be integrated into existing urban areas without much space
b. They require significant elevation differences or underground caverns to operate efficiently
Load forecasting systems differ from basic consumption models because they:
a. Use AI and weather data for continuously adaptive predictions
b. Control capacitor banks to stabilize power flow
c. Switch distributed resources based on local pricing
d. Analyze blackout scenarios through customer feedback
a. Use AI and weather data for continuously adaptive predictions
Which statement best describes the expected role of energy storage in a future energy system
by 2030?
a. Energy storage systems will be obsolete by 2030, replaced by advanced renewable generation technologies
b. The primary role of energy storage will be to increase flexibility and reduce the need for fossil based peak generation, particularly with the rise of solar and wind power
c. Energy storage will become less
important as grid expansion and demand-side management programs take over energy balancing needs
d. By 2030, storage technologies will no longer need to be integrated with renewable generation systems asenergy demand will stabilize
b. The primary role of energy storage will be to increase flexibility and reduce the need for fossil based peak generation, particularly with the rise of solar and wind power
System-sensitive devices are specifically designed to:
a. Allow real-time market bidding from consumers
b. Automatically curtail or adjust power use based on grid frequency and voltage
c. Reconfigure transmission paths for emergency energy supply
d. Replace analog power meters with smart devices
b. Automatically curtail or adjust power use based on grid frequency and voltage
Which of the following statements about energy storage demand is most accurate?
a. Energy storage demand is determined primarily by market outlook studies, which estimate future market growth for storage systems
b. Energy storage demand is independent of alternative flexibility options like grid extension or demand-side management
c. The technical necessity of energy storage is assessed without considering the economic feasibility of implementing such capacity
d. Flexible conventional generation is the sole factor in determining storage demand for renewable electricity integration
a. Energy storage demand is determined primarily by market outlook studies, which estimate future market growth for storage systems
How do distribution capacity marketplaces influence grid development?
a. By allowing distributed resources to replace centralized generation
permanently
b. By replacing traditional energy trading with AI-based optimization
c. By posting upgrade costs and enabling third-party alternatives to infrastructure expansion
d. By increasing fault tolerance across entire regional systems
c. By posting upgrade costs and enabling third-party alternatives to infrastructure expansion
When comparing energy storage systems, which factor most directly impacts the complexity
and cost of implementing smaller-scale storage systems?
a. Self-discharge duration
b. Footprint
c. Unit size
d. Energy density
b. Footprint
Which of the following storage technologies is most likely to be deployed in urban areas due
to its small footprint and flexibility?
a. Pumped hydro storage
b. Compressed air energy storage (CAES)
c. Lithium-ion batteries
d. Flywheel storage system
c. Lithium-ion batteries
In a battery, the electrolyte’s primary function is to
a. Provide electrons to the external load
b. Accept electrons from the positive electrode
c. Facilitate charge transfer between electrodes
d. Store the chemical energy
c. Facilitate charge transfer between electrodes
Which of the following battery types is known for potentially exhibiting the “memory
effect”?
a. Nickel-cadmium
b. Lithium-ion
c. Lead-acid
d. Lithium polymer
a. Nickel-cadmium
Pumped hydro energy storage primarily relies on:
a. Chemical reactions
b. Compressed air
c. Potential energy of water
d. Flywheel rotation
c. Potential energy of water
Compressed Air Energy Storage (CAES) systems typically use:
a. Chemical electrolytes
b. Underground caverns or aquifers
c. Rotating cylinders
d. Sensible heat storage
b. Underground caverns or aquifers
