Power flow study or Load flow study: Load Flow Analysis or Power Flow Analysis is the most crucial tactic to exploring problems in power system operating and planning. Based on a specified generating state and transmission network structure, load flow analysis solves the steady operation state with node voltages and branch power flow in the power system.
 The solution provides the voltages at various buses, power flowing in various lines and line losses.
 The information obtained from the load flow study is magnitude and phase angle of voltages, real and reactive power flowing in each line and the line losses.
 It is needed to decide the best operation of the existing system and for planning the future expansion of the system. It is also essential for designing a new power system.


What are the advantage and disadvantages of the Gauss-Seidel Method?
Advantage:
i. Calculations are simple and so the programming task is less.
ii. The memory requirement is less.
iii. Useful for a small systems.
Disadvantage:
i. Require a large number of iteration to reach convergence.
ii. Not suitable for large systems.
iii. Convergence time increases with the size of the system.

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