RISE OF VOLTAGE IN ATBARA-PORTSUDAN TRANSMISSION LINE : INVESTIGATION AND SOLUTION

Abstract

Transmission Lines voltage are usually controlled by controlling reactive power flow. In order to control the reactive power the generating or absorbing reactive power are used. There are many type of compensation method such as synchronous condenser, shunt reactor, series capacitors, tap-changing transformers, saturated reactors, and static var compensator (SVC). Atbara- Portsudan transmission line is considered as long line , static var compensator is used shunt reactor as a solution in the load in case of light loads. Static shunt capacitor are used in the case of peak load. For low voltages which are experienced in the load center in Portsudan city, capacitor banks are used to solve the drop of voltage. The problem of the appearance of the low voltage case in Portsudan is due to feeding the city from the tertiary winding of the transformer. This problem is corrected by implementing the 110 KV winding and connecting the city from this winding.