. What is the difference between conductor and cable?
A conductor is the smallest conducting unit inside a cable. Cable may be insulated type or non-insulated type, overhead or underground but it is made up of two or more than two conductors . There may be any insulation between the conductors or may not be , depending on the fact that whether they will serve same phase or different phases.
Wikipedia defines the cables as: ”an assembly of two or more electrical conductors, usually held together with an overall sheath. The assembly is used for transmission of electrical power. Power cables may be installed as permanent wiring within buildings, buried in the ground, run overhead, or exposed.”
2. What is Ferranti Effect?
Sometimes, Load side voltage becomes greater than the generator side voltage. This rise in voltage of receiving/load side due to capacitance of transmission lines is known as Ferranti Effect.
3. What are the Advantages of HVDC?
High-voltage direct current (HVDC) power transmission is an alternative to transmitting AC voltages for long distances.
HVDC is suitable for long-distance overhead power lines, or for underground power lines.
DC power lines are capable of delivering more power per conductor than equivalent AC power lines.
Because of its fewer power losses, HVDC is even more desirable for underground distribution.
The primary disadvantage of HVDC is the cost of the necessary AC-to-DC conversion equipment.
P.S: There are, however, some HVDC systems in operation in the United States. At present, HVDC systems have been designed for transmitting voltages in the range of 600 kV. The key to the future development of HVDC systems may be the production of solid state power conversion systems with higher voltage and current rating. With a continued developmental effort, HVDC should eventually playa more significant role in future electrical power transmission systems.