Voltage fluctuations in transmission networks caused by the operations of large consumers, for example, electric arc furnaces, are often the primary sources of high levels of flicker at the end-users. This article compares two methods for simulating the flicker propagation in a meshed high voltage network by comparing simulated levels of flicker with levels obtained from field measurements. The comparison of the simulated and measured flicker values was extended to include two different network schemes and provides a further insight into the nature of flicker propagation in power networks.
COBISS.SI-ID: 7834196
A method for managing the responsibility for harmonic distortion at the point of common coupling between a customer and a utility is presented in the paper. The proposed approach is based on the harmonic current vector method and uses reference impedances. The presented method enables harmonic contribution determination when the actual harmonic customer impedances are not known. It also improves the evaluation of harmonic distortion in resonance conditions. The method is verified by means of computer simulation and extensive field measurements.
COBISS.SI-ID: 6599764
In this paper, energy functions were constructed that consider the action of the interline power-flow controller (IPFC) in the form of a supplement to the known structure-preserving energy functions. They are based on a structure-preserving frame and can be applied to an arbitrary number of IPFCs that may consist of an arbitrary number of series branches. The developed energy functions were applied for a transient-stability assessment using the Lyapunov direct method, and they proved to be adequate.
COBISS.SI-ID: 6985300
Characteristic compensation FACTS devices are described in the chapter Flexible AC transmission systems in the international monographic publication »The industrial electronics handbook, Power electronics and motor drives«. In addition to the description of basic semiconductor elements, series and parallel connections and modeling of FACTS devices are presented, followed by the application of FACTS devices in a power system, their rating and cost assessment.
COBISS.SI-ID: 8290132
This paper proposes a time-optimal current control (TOCC) algorithm for a space vector modulation (SVM) based voltage source converter. The dynamics of the proposed controller are compared with a non-linear hysteresis controller known for its good dynamic performance. For the two algorithms the response to a reference step change is observed using PSCAD simulations. Results show that despite its digital implementation and constant switching frequency, the TOCC algorithm in most cases provides faster transient responses than the hysteresis controller.
COBISS.SI-ID: 8165460