The transient characteristics of short-circuit current (SCC) in doubly-fed induction generator (DFIG) are quite different from the widely researched conventional synchronous machines. However, second harmonic SCC that impact reliability transformer protection have not been accurately analysed. This paper presents generation mechanism DFIG by deducing dynamic response rotor-side converter, with ...

The main objective of this study is to mitigate current harmonic issues in hybrid renewable energy systems based on solar photovoltaic (SPV) and wind distribution. This achieved with the help a suitable controller-based shunt active power filter (SAPF). SAPF designed using modified synchronous reference frame (MSRF) generation, an adaptive hysteresis controller (AHCC) for switching pulse fuzzy ...

The progressive application of non-linear loads in distribution systems (DS) increases current harmonics flow in DS's apparatuses, especially distribution transformers (DTs). Since DTs' operating temperature rises due to the harmonics flow, their loading should be reduced such that the hot spot temperature (HST) is preserved under its permissible value. This means that DTs' available capacity i...

Increasing use of variable speed drives in industry causes harmonic proliferation in industrial power distribution supply system. Harmonic currents generated by the variable speed drives interact with power system impedance to give rise to harmonic voltage distortion. Thus it is essential to analyze, evaluate and introduce appropriate mitigation techniques for harmonic reduction in the power sy...

This paper presents a new method for evaluation and simulation of inrush current in various transformers using operational matrices and Hartley transform. Unlike most of the previous works, time and frequency domain calculations are conducted simultaneously. Mathematical equations are first represented to compute the inrush current based on reiteration and then Hartley transform is used to stud...

This paper presents the experimental results of comparison between leakage currents and discharge currents. The leakage currents were obtained on polluted porcelain insulator. Whereas, the discharge currents were obtained on lightly artificial polluted porcelain specimen. The conducted measurements were leakage current or discharge current and applied voltage. The insulator or specimen was in a...

Harmonics in electrical distribution systems are created from a number of sources and produce a variety of undesirable side effects. It is therefore important to understand all solutions that are available. Phase shifting will be reviewed as one concept for solving certain types of problems related to power quality. Both theoretical concepts and a case study are presented. Index Terms – Harmoni...

In this paper introduces a PV based generation system interlinked with shunt active power filter (SAPF) to provide the effective reactive compensation and mitigation of harmonics. The SAPF is comprised photovoltaic system, DC link capacitor voltage source inverter (VSI). current harmonics caused by nonlinear loads can be greatly reduced help filter. To generate reference regulation SAPF, artifi...