Electric Power Systems. Exercise 1.
Ответьте на вопросы:
- Can we state that the production and transmission of energy in the form of electricity is an important economic advantage?
- Do electric power systems make possible the utilization of power at a distance from the source?
- Why alternating current (AC) is generally used in modern power systems?
- By means of what equipment the current is easily converted to higher or lower voltages?
- Does an electric power system consist of six main elements? Name them.
- Are transformers used to raise the generated power to the high voltages used on the transmission lines?
- What does the central station of a power system consist of?
- Why do we call a water or steam turbine as a prime mover?
- Was most of the world's electric power in the early 1990s generated in steam plants?
- What are the lines of high-voltage transmission system usually composed of?
- How can the distance between towers be increased?
- What are generally used for lower voltage sub transmission and distribution lines?
- In cities and other areas where open lines create a hazard, insulated underground cables are used for distribution.
- Where and why insulated underground cables are used for distribution?
- How can you explain the fact that any electric-distribution system involves a large amount of supplementary equipment?
- Does the system include devices designed to regulate the voltage?
- What kind of equipment is used for protection of generators, transformers, and the transmission lines?
- What do electric power systems include?