The paper deals with the influence of distributed generation (DG) on distribution line losses with respect to voltage profile. The article focuses on the development of a control strategy to minimize the grid losses and assure fairness regarding reactive power contributions. As retail customers typically have no choice where they are located along a feeder, it seems unfair that only some of them take all the burden and responsibility for the voltage rise. On the basis of new technologies in distribution networks, a new control system has been proposed that combines classical centralized and local control. Different control solutions were evaluated by means of computer simulations.
COBISS.SI-ID: 9420884
The calculation of flicker propagation is vital in assessing power quality levels throughout the network. As an alternative to the established stationary flicker propagation methods, this paper introduces representative voltage samples. The shorter 1-s voltage samples are extracted from the instantaneous voltages measured and can represent the longer operating periods of an arc furnace. Additionally, the flicker levels in nodes under the influence of flicker from multiple arc furnaces can be obtained without the use of superposition factors.
COBISS.SI-ID: 35976965
Paper presents a three-phase current-based model of FACTS devices for power flow calculation with Newton-Raphson method. First, it presents the basic method of three-phase current-based modelling of FACTS devices, together with existing three-phase model of FACTS devices and the type of FACTS devices. Next, determinations of controlled parameters depending on the type and usage of FACTS devices are presented. At the end numerical examples in the IEEE 300 bus system are presented. The problem of initial values is exposed and superiority of the new method by comparison with the existing ones.
COBISS.SI-ID: 9428820