Impact of Slack Bus Inclusion in Newton Raphson Load Flow Studies

Authors : Tanmay Shukla , Prof. Rajesh Sahu,

Volume/Issue : Volume 2 - 2017, Issue 7 - July

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load flow is an important tool in the power system network to obtain its solution under incremental loading conditions at present and in future. This analysis is continuously made on the existing power system to establish equilibrium at present condition and load flow analysis is also helpful in undertaking proper system planning work for future. Among the various load flow methods Newton Raphson and its derivatives are most popular ones. In Newton Raphson method one of the buses (generally a generator bus) is treated as slack bus and is kept out of iterations. And when we conclude the result through iterations then we look for the losses and we say that losses are being fed by slack bus in this way we get the total power supplied by slack bus at the end when the iteration converges. The exclusion of slack bus from load flow iteration restricts us to make many other analyses. Now we are making an approach to find if the slack bus is included in the iteration then what will be its losses and will it be more efficient or less efficient than conventional NewtonRapson load flow system


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