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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...
This paper presents a new load flow based on Newton-Raphson method. The matrices used in the method are the constants matrices of conductance and susceptance. The proposed method uses the equations to calculate the voltages angles and voltages modules in decoupled form. In the scheme of iteration values most up to voltages angles are used to calculate voltages modules and the same procedure is used...
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...
Small impedance branches may lead to divergence of power flow. The convergence of power flow can be improved by some methods, such as improving voltage start, improving the Jacobian matrix, and using fast decoupled power flow. This paper investigates these methods, and finds out that when these methods are applied to systems with small impedance branches, they possess same characteristic, that is...
This paper formulates a set of equations (SOE) to describe a radial distribution system with high R/X ratio. The SOE comprises 3(N - 1) second-order equations and an equal number of variables for an N-bus system. The proposed method solves this SOE using the first-order Newton-Raphson technique. The SOE model accounts for elements such as transformers, transmission lines, shunt capacitors, constant...
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