Solar, Wind & Storage Technologies Flashcards
7 cards from real CCP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Solar, Wind & Storage Technologies flashcards as text
What is the primary function of a Maximum Power Point Tracker (MPPT) in a solar PV system?
Answer: Optimize the operating voltage to extract maximum power from the panels
MPPT controllers continuously adjust the electrical operating point of the PV modules to extract the maximum available power under varying irradiance and temperature conditions.
Which offshore wind foundation type is most suitable for water depths between 40–60 meters?
Answer: Jacket/lattice structure
Jacket foundations (lattice structures) are preferred for intermediate water depths of roughly 30–80 meters where monopiles become structurally inefficient.
In a lithium-ion battery, what is 'State of Health' (SoH) used to measure?
Answer: Remaining useful capacity relative to original rated capacity
SoH compares a battery's current maximum capacity to its original rated capacity, indicating overall degradation over its service life.
What is 'curtailment' in the context of wind and solar energy?
Answer: Deliberate reduction of renewable output to prevent grid overloading
Curtailment is the intentional reduction of renewable generation output below available capacity, typically ordered by grid operators to maintain system balance.
Which solar cell technology achieves the highest single-junction theoretical efficiency limit, known as the Shockley-Queisser limit?
Answer: Approximately 33%
The Shockley-Queisser limit sets the maximum theoretical efficiency for a single-junction solar cell at approximately 33% under standard conditions.
What does a wind turbine's 'cut-out speed' refer to?
Answer: Wind speed at which turbines shut down to prevent mechanical damage
Cut-out speed (typically 25 m/s) is the wind velocity at which turbines automatically shut down to protect mechanical and electrical components from storm damage.
Pumped-storage hydropower (PSH) currently represents approximately what share of global grid-scale energy storage capacity?
Answer: 90%
Pumped-storage hydropower accounts for roughly 90% of global installed grid-scale energy storage capacity, making it by far the dominant storage technology.