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HERMAN, L., PAPIČ, I.
OPTIMAL REACTIVE POWER CONTROL IN INDUSTRIAL NETWORKS WITH DISTORTED VOLTAGES AND CURRENTS
KOMUNALNA ENERGETIKA / POWER ENGINERING, 15
In modern industrial processes, the number of nonlinear loads, which are known to be a major source of current harmonics, is constantly growing. At the same time, the number of reactive power compensators operating in these networks is also growing. Although compensators are not sources of harmonic distortions, they may cause high amplifications of harmonics by creating resonance conditions. This can cause malfunctions or even loss of equipment. Due to the growing number of reactive power compensators in a typical industrial network, the control of these networks is also becoming increasingly demanding. An industrial network operator has a difficult task of finding an optimal configuration of compensators, which covers reactive power demands and at the same time does not cause resonance amplifications of harmonics. Thus, in this paper, a concept of a virtual compensator is proposed. It combines all reactive power devices of a certain network within a single control scheme. This gives the operator the ability to control each compensator independently in real time and to achieve optimal configuration of compensators, for every operation point of the network. The effectiveness of the proposed algorithm is demonstrated on the realistic industrial network model by means of simulation.
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