the admittance matrix basically is used in the following matrix equation
=[Ybus]*[V]
this equation is nothing more than the nodal analysis of a power system...it's Circuits 101 put into an elegant matrix form which makes power system analysis easier...for instance it's used to solve for the voltages at each node using an iterative method.
the diagonal elements of Ybus represent the sum of all admittances connected to a node
the off-diagonal elements represent the admittance value between any 2 nodes
the iteration methods are just methods for solving nonlinear algebraic equations
in this case, solving the nonlinear power flow equations for bus voltages
Newton-Raphson is the one used in most software programs
Gauss-Siedel is a more basic method, but it takes more iterations for solutions to converge, and in some cases, doesnt reliably converge to a solution like Newton-Raphson does
OK, i have downloaded the PSSE, i have tried it but not getting the right way to use it.
please tell how to start with simple construction, and what simulation we can do in it??
I don't know, i have download from some site called Siemens or something like university.
Anyway can u please start how to use it any brief intro will help!