Choice of best transmission line conductor and percentage line compensation required in order to achieve best power evacuation scheme for IPP’s

Abstract

Private participation in generating power is being encouraged in the country in order to meet high power
requirement. As a result, many independent power producers (IPP) are establishing pit head thermal power stations. Many
a times, the IPPs have to execute a contract with the state electricity board, under whose jurisdiction the location of the
generating plant comes up lies, that a certain percentage of the installed capacity of the plant shall be supplied to the state
grid and the balance power can be supplied to others. In such cases, there is a requirement for precisely controlled power
flow over a transmission line between the IPP’s generating station and the state grid substation at which the contracted
power is to be delivered and provision for evacuating the balance power to nearby state grid substation. In a case where the
installed capacity of the IPP is 500 MW, 300MW of power shall be supplied to the state grid whenever the generation is more
than 300MW and full generated power if the generation is less than 300 MW. To achieve this control of power flow is
essential. Hence it is required to select best conductor is required in order to reduce transmission losses and selection of
percentage of compensation required to achieve control over the power flow in an AC transmission line. In this paper
performance analysis is carried out in order to select best transmission line conductor amongst various conductors available
and also percentage line compensation required to reduce reactive power flow and to control voltage and current in an AC
transmission line