Flashcards on Power Grid Operations and Voltage Classification
Power Grid Operations and Voltage Classification Explained
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Electric Power Transmission and Distribution
11 cards
Card 1
Question: In the power grid diagram, what are the sequence of stages from generation to consumer?
Answer: Generation → Transmission network → Substation → Distribution network → Consumer.
Card 2
Question: Why must the electricity grid remain stable?
Answer: To avoid power cuts, since even short failures can cause major problems for factories, businesses and hospitals.
Card 3
Question: At what voltage level is electricity typically generated?
Answer: At medium-voltage level.
Card 4
Question: At what voltage levels is electricity transmitted?
Answer: At high- or extra high-voltage levels.
Card 5
Question: At what voltage levels is electricity distributed to customers?
Answer: Distributed at medium voltages to industrial customers and at low voltages to residential customers.
Card 6
Question: According to the given classification, what voltage range defines low voltage?
Answer: Below 1 kV.
Card 7
Question: According to the given classification, what voltage range defines medium voltage?
Answer: Between 1 kV and 33 kV.
Card 8
Question: According to the given classification, what voltage range defines high voltage?
Answer: Between 33 kV and 132 kV.
Card 9
Question: According to the given classification, what voltage range defines extra high voltage?
Answer: Higher than 132 kV.
Card 10
Question: Why are different voltage classes used between the power station and delivery point?
Answer: They are designed to minimise the loss of power between the power station and the delivery point.