Diagram - Examples
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
Due to this, electric field of the line is changed. To take into account the effect of earth, the method of images as suggested by Lord Kelvin can be used to calculate the capacitance.
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
The force on a charge in the field is measured by electric field intensity which is equal to the force in newtons per coulomb on a coulomb of charge at the point considered and is measured in volts per metre.
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
Capacitance between the two conductors of a two wire line is the charge on he conductors per unit of potential difference between them. Capacitance of the line per unit length is given by C = q/v (F/m).
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
The bundled conductor lines consist of two, three or four conductors.A two conductor bundle has its subconductors placed in a horizontal plane with certain spacing between them. A three conductor bundle has its subconductors placed on the vertices of an equilateral triangle. Similarly a four conductor bundle has its subconductors placed at the comers of a square.
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
Due to the potential difference between the conductors we have to take into account the capacitance of transmission line.
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
The electric potential at a point due to a charge is measured by the work done in bringing unit positive charge from infinity to that point.
Diagram - Examples
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
Consider the three phase double circuit with the conductors placed at the vertices of a regular hexagon which is shown in the Fig. 1.22.1.
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
It can be seen that many a times 3 phase transmission lines are working with more than one circuit in parallel.
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
Consider three phase double circuit having conductors which are unsymmetrically spaced.
Diagram
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
Consider the same three conductors a, b, c having radius r but unsymmetrically spaced as shown in the Fig. 1.18.1.
Diagram
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
The drops in the three phases due to these inductances are observed to be different. Thus at the receiving end we will not get the same voltage.
Transmission Line Parameters
Subject and UNIT: Transmission and Distribution: Unit I: Transmission Line Parameters
Consider a three phase line consisting of three conductors a, b and c as shown in the Fig. 1.17.1. These three conductors are equally spaced at the comers of an equilateral triangle having radius r.