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Voltage source converter (VSC) DC systems are a new and emerging technology. They offer advantages over AC systems but also pose concerns, such as transient fault currents. VSCs are not protected against very fast-transient overcurrent caused by DC cable faults. In order to design protection systems for prompt interruption and isolation of these faults, DC system behavior under fault conditions must...
The use of light emitting diode (LED) lamps in utility distribution systems is spreading because of the implementation of energy saving policies. These devices may malfunction and consume current peaks due to voltage sags, which are one of the most serious problems for sensitive equipment. This paper investigates the impact of voltage sags on currents consumed by LED lamps, and proposes an equivalent...
Voltage source converter (VSC) DC systems are a new and emerging technology. These systems offer advantages over AC systems but also present concerns, such as transient fault currents. VSCs are not protected against high fast-transient overcurrent caused by DC cable short circuit. Thus, DC system behavior under fault conditions must be studied to design protections which promptly interrupt and isolate...
DC systems are a new and emerging technology. DC system benchmark networks are necessary to study transient faults and operation condition changes in these systems (specifically in MVDC systems because they are in a conceptual stage). The paper offers an overview of all DC system architectures and proposes MVDC system benchmark networks based on the knowledge of existing HVDC and LVDC system networks.
The current number of compact fluorescent lamps (CFL) in power distribution systems is increasing because of their low energy consumption, in comparison with traditional incandescent lamps, and their long average useful life. This paper studies CFL modeling. A "black box" model of CFLs is presented and the analytical expressions of CFL harmonic currents are provided. The study is based on...
The current number of magnetic and electronic ballast discharge lamps in power distribution systems is increasing because they perform better than incandescent lamps. This paper studies the magnetic discharge lamp modeling. In particular, the arc voltage waveform is analyzed and the limitations of the square waveform model are revealed from experimental measurements.
Wind farm harmonic emissions are a well-known power quality problem, but little data based on actual wind farm measurements are available in literature. In this paper, harmonic emissions of an 18 MW wind farm are investigated using extensive measurements, and the deterministic and stochastic characterization of wind farm harmonic currents is analyzed. Specific issues addressed in the paper include...
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