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Excessive reactive power flows are an important problem in a power system. Optimization of reactive power flows in the system allows reducing them. This paper deals with optimization of reactive power flows in the national power system. Effects of two variants of this optimization are presented. One of them is when voltage magnitudes at generation nodes, on-load tap changer positions, and reactive...
Phase shifting transformers are widely used for control of active-power-flows in power systems. Modern variant of phase shifting transformer is (semiconductor-controlled) static phase shifter. All the mentioned devices allow changing phase shift between the voltages at the interconnected busbars. Those devices called as phase shifters play the important role in a power system. The paper deals with...
The paper deals with evaluation of a power system from the view-point of voltage stability. It is concerned with the indices which are proposed as voltage collapse proximity indicators. In the existing papers, many such indices can be found. In the paper, the so-called line stability indices, defined using the static approach to the study of voltage stability, are taken into account. If the line stability...
Optimization of reactive power flow is one of the problems of optimal power flow in a power system. Solution of that problem has positive impact on economic and safe power system operation. Aim of the paper is to present the investigation of results of optimization of reactive power flow in a power system with the use of genetic algorithms for two different objective functions from the voltage-stability...
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