What is transmission line and classification of transmission line?

The transmission line is the part of the power system, it is the medium for transmitting the electrical power generated at generating station to load centers. The transmission lines are classified based on the voltage level, length of the conductor, and types of current flow.

What are the three types of transmission line?

The types of transmission lines are: Overhead Transmission Lines. Subtransmission Lines. Underground Transmission Lines.

What are types of transmission system in electrical?

Fundamentally there are two systems by which electrical energy can be transmitted: High voltage DC electrical transmission system. High AC electrical transmission system.

How do you classify small medium and long transmission lines?

Medium transmission line – The line length is between 60 km to 160 km and the line voltage is between 20kV to 100kV. Long transmission line – The line length is more than 160 km and the line voltage is high greater than 100KV.

What are the 4 basic parameters of transmission line?

The transmission line has mainly four parameters, resistance, inductance, capacitance and shunt conductance. These parameters are uniformly distributed along the line. Hence, it is also called the distributed parameter of the transmission line. …

What voltage is transmission?

The electricity in transmission lines is transported at voltages of over 200 kV to maximize efficiency. Voltages of 220 kV to 500 kV are typical. Transmission lines are usually attached to large lattice steel towers or tubular steel poles.

How many types of transmission line are there?

Two common types of transmission line are coaxial line (Figure 3.2. 1) and microstrip line (Figure 3.2. 2). Both are examples of transverse electromagnetic (TEM) transmission lines.

What are the 3 types of power distribution?

There are three basic types of distribution system designs: Radial, Loop, or Network. As you might expect, you can use combinations of these three systems, and this is frequently done. The Radial distribution system is the cheapest to build, and is widely used in sparsely populated areas.

How many types of electrical transmission are there?

4 Types of Power Transmission – Mechanical, Electrical, Hydraulic and Pneumatic (Pros & Cons)

How many types of transmission towers are there?

There are four major categories of transmission towers: suspension, terminal, tension, and transposition.

What are the 5 types of electrical loads?

The Different Types of Electrical Load
  • Resistive Load. Any load that consists of a heating element is generally referred to as a resistive load. …
  • Inductive Load. …
  • Capacitive Load. …
  • Domestic (Residential) Load. …
  • Commercial Load. …
  • Industrial Load. …
  • Municipal Load.

What is primary and secondary transmission?

Primary transmission: The electric power at 132 kV is transmitted by a 3-phase, 3-wire overhead system to the outskirts of the city. This forms the primary transmission. Secondary transmission: The primary transmission line terminates at the receiving station which usually lies at the outskirts of the city.

What is DC 3-wire system?

Three Wire DC Distribution Systems: It consists of two outer wires and a middle or neutral wire which is earthed at the substation. Availability of two voltages in a 3-wire system is preferred over the 2-wire system for d.c. distribution.

Which type of load is AC?

Three basic loads occur in AC circuits-resistive, inductive and capacitive (and various combinations of the three). As it sounds, a resistive load consists purely of a resistance. Electrical resistance is simply a measurement of the opposition to the passage of current (electrons).

What are 4 examples of electrical loads?

Electric lamps, air conditioners, motors, resistors etc. are some of the examples of electrical loads. They can be classified according to various different factors.

What is the formula of a load factor?

The load factor percentage is derived by dividing the total kilowatt-hours (kWh) consumed in a designated period by the product of the maximum demand in kilowatts (kW) and the number of hours in the period.

What type of load is a motor?

inductive loads
Loads that power electrical motors are inductive loads. These are found in a variety of household items and devices with moving parts, including fans, vacuum cleaners, dishwashers, washing machines and the compressors in refrigerators and air conditioners.

What does kVAR mean?

kiloVolt Amps Reactive
Used to express reactive power in a circuit. 1000 Volt Amps Reactive (VAR) = 1 kiloVolt Amps Reactive (kVAR). Usually used to express power in all forms, but is reserved to express real power.

What is inductive load?

Reactive/Inductive Load – An inductive load converts current into a magnetic field. Inductive reactance resists the change to current, causing the circuit current to lag voltage. Examples of devices producing reactive/inductive loads include motors, transformers and chokes.

What is load torque?

Full-load torque is the amount of turning force the motor produces at its operating speed in order to develop the rated horsepower. From: Transformers and Motors, 1989.

What is meant by power factor?

Power factor (PF) is the ratio of working power, measured in kilowatts (kW), to apparent power, measured in kilovolt amperes (kVA). Apparent power, also known as demand, is the measure of the amount of power used to run machinery and equipment during a certain period. It is found by multiplying (kVA = V x A).