Abstract
A method for calculating nodal loads with the known supply bus voltage the circuit head section current is developed. The electric network model is represented by the main section, in which the parameters of power transmission lines are known, and means for altering the circuit state are available. The state of the circuit can be altered by changing the supply bus voltage through adjusting the substation power transformer’s OLTC, by changing the parameters of power lines equipped with FACTS devices, or by a combination of both. The nodal voltages at the load nodes will be different in different states, with the power flows remaining unchanged. The advantage of the approach and its theoretical significance lie in the fact that all necessary relationships have been obtained analytically, and that the complex nonlinear problem has correctly been reduced to a set of linear operations. determined. The proposed approach can be used in locating unauthorized connections to the network.
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