Question

Imagine a world where alternating current (AC) electric power systems were not discovered at all. Using concepts of electric power systems, speculate how would a world running on direct current (DC) electric power systems look like in contrast to an AC powered world (explain these differences in aspects of the science as well as the society).

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Answer 1

De powered world in contrast to are succesfull as as Aus) Problems faced in A powered world :- (1) power generation and transmission or (a) oc grids practically not AC gride because any transmission line inevitably have resistance & so, when current flows through losses. The efficiency of is very cow. So, it is constrained very small distances and also for only will at there will be huge de transmission to populated need more you which power stations each over all very densely areas. (b) with DC grids the city ciltimately increases expense leads to wigher price electricity (C) with AC grids advantage of using transformer to step up and step down Vo Hages. and of . have p= V*I P= Power V = Voltage I = current. at فيها TO value of transmit the some power currents require higher voltages. This is done by transformer reduce the dosses during transmission of power for longer distances. to

DC DC and boustes, they Maintanence of Machinery: machines alequires commutator require a lot of regular maintanence Provide good performance. in order to AC machines other on the hand are very Simple and robust in construction . (6) cost of are relatively . De generators and motors high compared to te machines (3) safety use dc system in would heavy dc currents our equipments which if passes causes severe problems. a) it ous nomes / there be then flowing through through our body Although DC has its own merits like HUDC where De . distances (> 800km) by using dc , transmission is preferred over very long But for ditances (4 800 koo) need rectifiers and investers and thus it leads to ovex all at ends cost of transmission if DC would have complenity and modern world, then and complexity of getting electricity very wigh become one of base need days. powered this cost would be as electricity has the now a