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 by itself.
c. It’s too dangerous to store.
d. It’s always cheaper to convert.
b. It can’t be stored easily by itself.
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. Automotive applications.
d. Distributed grid technologies.
b. Utility shaping.
What is the main purpose of “power quality” applications?
a. To store energy for 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 a car.
b. Moving energy from where it’s made to where it’s used.
What are “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 “advanced 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 applications.
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 as energy 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.
