Transmission and distribution 3 min read
PERFORMANCE OF SINGLE PHASE SHORT TRANSMISSION LINES
As stated earlier, the effects of line capacitance are neglected for a short transmission line. Therefore, while studying the performance…
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Transmission and distribution 4 min read
CLASSIFICATION OF LINES
The important considerations in the design and operation of a transmission line are thedetermination of voltage drop, line losses and…
Transmission and distribution 6 min read
CORONA
When an alternating potential difference is applied across two conductors whose spacing is large as compared to their diameters, there…
Transmission and distribution 5 min read
CONDUCTORS
Commonly used conductor materials: The most commonly used conductor materials for over head lines are copper, aluminium, steel cored aluminium,…
Transmission and distribution 3 min read
INDUCTIVE INTERFERENCE WITH NEIGHBOURING COMMUNICATION CIRCUITS
It is usual practice to run telephone lines along the same route as the power lines. The transmission lines transmit…
Transmission and distribution 2 min read
CAPACITANCE OF A SINGLE PHASE TWO-WIRE LINE
Consider a single phase overhead transmission line consisting of two parallel conductors A and B spaced d metres apart in…
Transmission and distribution 3 min read
CONCEPT OF SELF-GMD AND MUTUAL-GMD
The use of self geometrical mean distance (abbreviated as self-GMD) and mutual geometrical mean distance (mutual-GMD) simplifies the inductance calculations,…
Transmission and distribution 4 min read
INDUCTANCE OF A SINGLE PHASE TWO-WIRE LINE
A single phase line consists of two parallel conductors which form a rectangular loop of one turn. When an alternating…
Transmission and distribution 3 min read
PARAMETERS OF SINGLE AND THREE PHASE TRANSMISSION LINES WITH SINGLE AND DOUBLE CIRCUITS
CONSTANTS OF A TRANSMISSION LINE A transmission line has resistance, inductance and capacitance uniformly distributed along the whole length of…
Transmission and distribution 5 min read
EHVAC and HVDC Transmission System
Development of EHV transmission systems EHVAC The first 735 kV system was commissioned in Canada in 1965. Since then, voltage…