Medium Line

May 31, 2024 Post a Comment

Medium line

ravi April 28, 2021. The transmission line having a length between 80km to 240km and voltage level is between 20kv to 100kV is considered as a medium transmission line. In case of medium transmission line, we cannot neglect the effect of capacitance like short transmission line.

Which line is known as medium line?

By length of the line Lines shorter than 50 km are generally referred to as short transmission lines. Lines between 50 km and 150 km are generally referred to as medium transmission lines. Lines longer than 150 km are considered long transmission lines.

What is short and medium transmission line?

1. Short transmission line – The line length is up to 60 km and the line voltage is comparatively low less than 20KV. 2. Medium transmission line – The line length is between 60 km to 160 km and the line voltage is between 20kV to 100kV.

How are capacitance considered for medium lines?

Since medium transmission lines have sufficient length (50-150 km) and usually operate at voltages greater than 20 kV, the effects of capacitance cannot be neglected. Therefore, in order to obtain reasonable accuracy in medium transmission line calculations, the line capacitance must be taken into consideration.

What are the 3 types of overhead transmission line?

The overhead transmission line classify into three types according to the manner in which capacitance is taken into account.

Short transmission line.
Medium transmission line.
Long transmission line.

What are the three types of transmission lines?

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

What is long and medium transmission line?

A transmission line having a length of more than 80 kms but less than 250 kms is considered as a medium transmission line. The parameters (Resistance, Inductance, and Capacitance) are distributed uniformly along the line.

Why are there 3 power lines?

Because they carry 3-phase alternating current. When there are just 3 cables, the circuit is closed by ground.

What is kV transmission line?

Transmission voltages are defined as any line with voltage greater than 39,000 volts or 39 kV. The metric abbreviation kV for kilovolts is commonly used when talking about transmission line voltages. Commonly used transmission voltages are 69 kV and 138 kV.

What is short transmission line?

A short transmission line is defined as a transmission line with an effective length less than 80 km (50 miles), or with a voltage less than 69 kV. Unlike medium transmission lines and long transmission lines, the line charging current is negligible, and hence the shunt capacitance can be ignored.

What is transmission line and types?

Types of transmission line include parallel line (ladder line, twisted pair), coaxial cable, and planar transmission lines such as stripline and microstrip. The higher the frequency of electromagnetic waves moving through a given cable or medium, the shorter the wavelength of the waves.

What is long transmission line?

The transmission line having a length of more than 250km is considered a long transmission line. The line parameters are distributed over the entire length of a transmission line.

How medium transmission line is represented?

The shape of the circuit so formed resembles that of a symbol Π, and for this reason, it is known as the nominal Π representation of a medium transmission line. It is mainly used for determining the general circuit parameters and performing load flow analysis.

What is GMR and GMD?

GMD & GMR stands for Geometrical Mean Distance and Geometrical Mean Radius. This concept is very useful in Power System for the calculation of Inductance and Capacitance of Transmission Line.

Why capacitor is used in transmission line?

Detailed Solution. Series capacitors are used to compensate the inductance of transmission line. They will increase the transmission capacity and the stability of the line. These are also used to share the load between parallel lines.

What are 4 types of conductors?

There are four types of conductors, namely, good conductors, semiconductors, resistors and non-conductors. Non-conductors are also termed as insulators.

What are the types of poles?

They can be divided into three types namely; Tangent distribution poles, guyed distribution poles, and self-supporting distribution poles.

What conductor is used for 33KV line?

Power/Voltage: 11KV,33KV. Conductor: Copper.

Are transmission lines AC or DC?

Transmission lines mostly use high-voltage AC (alternating current), but an important class of transmission line uses high-voltage direct current. The voltage level is changed with transformers, stepping up the voltage for transmission, then reducing voltage for local distribution and then use by customers.

Which transmission line is best?

Since there is no inductance and capacitance, the voltage drop in a DC transmission line is less than an AC line for the same sending end voltage and load. Therefore, a DC transmission line has better voltage regulation.