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Unit 2.3 Electricity distribution
Page 89


11. Complete the sentences with the correct words.

1. Electricity has to cover a long distance between the place it is generated, the , and its final users.
2. One of the main causes of is the electricity network overloading.
3. Power voltage must be stepped down by means of a before it reaches households.
4. Some natural events or extreme weather conditions might knock down .
5. are becoming popular because they help people manage their electricity consumption.
6. Before flowing along power lines, power voltage must be stepped up or down at a .
7. The resistance of cables to the passage of current causes great power .
8. such as hurricanes or exceptional heat waves can cause problems to the grid.
9. As we need it for a lot of purposes, electricity must be constantly to consumers.
10. Electricity varies according to the time of the day and of the year.
11. A smart grid can integrate of energy more easily.
12. A transformer consists of coils of wire wound around an iron squared .
12. Match each word with the correct definition.
RelayStep-up transformerSubstationPrimary windingPMUInput voltageEnergy utility companyLoad
An instrument used to increase voltage. →
A place where voltage is increased or decreased for power transmission and distribution. →
A device for monitoring fluctuations in voltage or current on the grid. →
The part of a transformer connected to the input voltage. →
An electromechanical or digital device that controls a circuit. →
The power that is supplied to an appliance. →
A company that manages the production, transmission, and distribution of electricity. →
The amount of electrical demand that has to be managed by a power grid. →
13.1 Match each word with a suitable one in order to form compound words or phrases.
lossinductionupconsumptionsourcedownvoltageoutwindinggrid
step →
output →
electromagnetic →
secondary →
worn →
smart →
back →
power →
real-time →
charging →
13.2 Write a sentence with each compound word or phrase from the previous exercise. aperta