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Power flow solutions are the key in many power system studies. In this paper, the power flow problem is formulated within rectangular coordinates. Using a voltage-dependent load model and linear approximation techniques, the problem is formulated as a system of mixed linear and nonlinear equations. An efficient matrix decomposition is then applied to facilitate establishing the Jacobian matrix in...
This paper presents a methodology to determine corrective adjustments in the demand when the power flow equations have no solution. This is formulated as a constrained optimization problem, which has the flexibility to select the buses that have load adjustment and those whose demand will be preserved. Useful information about the buses with major effects on the infeasibility of the power flow solutions...
Impacts of Distributed Generation (DG) resources on distribution networks have been studied. A Newton-Raphson algorithm based three phase unbalance power flow program has been developed to incorporate the effects of system unbalance and single phase DG injection. Power flow equations have been formulated and solved in phase coordinated form. Effects of substation load-tap changer, voltage regulator,...
A generalized Super Super decoupled Loadflow referred to as SSDL-X'X' method is presented along with its special case manifestations leading to the proposed SSDL-YY method. Gain matrices of the SSDL-YY method are defined independent of rotation angles and they differ only in their diagonal terms. The diagonal terms in the gain matrix of Q-V sub-problem are characterized by the presence of transformed...
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