Comparative Evaluation of HVAC and HVDC

1.   Introduction

The transmission and distribution of electrical energy

started with direct current (DC) in the late 19th century, but

it was inefficient due to the power loss in conductors.

Alternating current (AC) offered much better efficiency,

since it could easily be transformed to higher voltages, with

far less loss of power. AC technology was soon accepted as

the only feasible technology for generation, transmission

and distribution of electrical energy.

However, high-voltage AC transmission links have

disadvantages and engineers were engaged in the

development of a technology for DC transmissions as a

supplement to the AC transmissions. The invention of

mercury arc rectifiers and the thyristor valves, made the

design and development of line-commutated current

sourced converters possible.

High Voltage Direct Current (HVDC) transmission finally

proved to be technically feasible. The world's first

commercial HVDC transmission link, was built in 1954

between the Swedish mainland and the island of Gotland,

with a rating of 20 MW, 200 A and 100 kV

Questions About Electric Power Transmission

Transmission of electrical power is commonly performed on high voltage, either using the HVAC (high voltage alternating current) and HVDC (high voltage direct current). the former uses an alternating current and this is contained in our country. The second course uses direct current. in this post, I will not touch such a question: Which is better, HVAC or HVDC? My problem is something more fundamental, namely concerning the reasons why the transmission done at a high voltage (even extra high) . it was clear from some college (khususnya high voltage engineering) that the transmission of electrical power carried on the high voltage to reduce losses associated with the transmission line impedance. but ... .Please refer to here to find out more about the various voltage values commonly used in transmission lines and its classification.