Practices for solving end-user power quality problems

Integration of a wind farm with electric grid is an issue that has gained interest due to poor power quality and unmatched power and frequency of grid. Maintenance of power quality has become an important factor in modern power systems. The usage of non-linear loads results in various power quality events which over a period would reduce life and deteriorate the performance of end user equipment. FACTS devices are available that use power electronic components provide efficient solutions for improving power quality in Distribution systems. This paper discusses performance of three FACTS devices SSSC, DSTATCOM and UPQC for mitigating voltage sags, swells and harmonics injected into a DFIG based WECS. The model is developed on MATLAB/ SIMULINK platform and results are presented.

Download Full-text

Power Quality Phenomena in Electric Railway Power Supply Systems: An Exhaustive Framework and Classification

Energies ◽

10.3390/en13246662 ◽

2020 ◽

Vol 13 (24) ◽

pp. 6662 ◽

Cited By ~ 1

Author(s):

Hamed Jafari Kaleybar ◽

Morris Brenna ◽

Federica Foiadelli ◽

Seyed Saeed Fazel ◽

Dario Zaninelli

Keyword(s):

Power Systems ◽

Power Quality ◽

End User ◽

Systematic Classification ◽

Scientific Papers ◽

The Status ◽

Interactive Interfaces ◽

Electric Railway ◽

Supply Systems ◽

Railway Power Systems

Electric railway power systems (ERPS) as one of the most critical and high-power end-user loads of utility grids are characterized by outlandish power quality (PQ) problems all over the world. The extension and evolution of different supply topologies for these systems has resulted in significant and various forms of distortions in network voltage and current in all ERPS, the connected power system, and adjacent consumers. During the last years, numerous studies have been offered to investigate various aspects of PQs in a specific supplying topology. Variation in the supply structure of the ERPS and different types of locomotives has propelled the observation of different PQ phenomena. This versatility and development have led to confront considerable types of two-way interactive interfaces as well as reliability and PQ problems in ERPS. In addition, the lack of standards explicitly dedicated to ERPS has added to the ambiguity and complexity of this issue. In this paper, an extensive review of PQ distortions and phenomena in different configurations of ERPS is proposed and a systematic classification is presented. More than 140 scientific papers and publications are studied and categorized which can provide a fast review and a perfect perspective on the status of PQ indexes for researchers and experts.

Download Full-text