scholarly journals Identification of Grid Impedance by Broadband Signals in Power Systems with High Harmonics

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7398
Author(s):  
Matthias Buchner ◽  
Krzysztof Rudion
Keyword(s):  
Power Systems ◽  
Power Electronics ◽  
Binary Sequence ◽  
Impedance Measurements ◽  
Popular Method ◽  
Distributed Power Generation ◽  
High Harmonics ◽  
Grid Impedance ◽  
Depth Analysis ◽  
Power Generation Systems

Grid impedance is an important parameter and is used to perform impedance-based stability analysis for the operation of grid-connected systems, such as power electronics-interfaced solar, wind and other distributed power generation systems. The identification of grid impedance with the help of broadband signals is a popular method, but its robustness depends strongly on the harmonic disturbances caused by non-linear loads or power electronics. This paper provides an in-depth analysis of how harmonics affect the identification of grid impedance while using broadband measurements. Furthermore, a compensation method is proposed to remove the disturbing influences of harmonics on broadband impedance identification. This method is based on exploiting the properties of the used maximum-length binary sequence (MLBS). To explain the methodology of the proposed method, the design basis for the excitation signal is discussed in detail. The analysis from simulations and a real measurement in an industrial power grid shows the effectiveness of the proposed method in compensating the disturbing influences of harmonics on broadband impedance measurements.

IoT Assisted Power Electronics for Modern Power Systems

2021 ◽  
Author(s):  
Sudhir K. Routray ◽  
Abhishek Javali ◽  
Anindita Sahoo ◽  
Laxmi Sharma ◽  
K. P. Sharmila ◽  
...  
Keyword(s):  
Power Systems ◽  
Power Electronics

scholarly journals Kalman Filter on Power Electronics and Power Systems Applications

10.5772/6815 ◽  
2009 ◽  
Author(s):  
Fernando P. ◽  
Diego Coln ◽  
Marcelo S. de Padua ◽  
Sigmar M.
Keyword(s):  
Kalman Filter ◽  
Power Systems ◽  
Power Electronics

scholarly journals Hot Gas Filters for Coal and Biomass Power Systems

1999 ◽  
Author(s):  
R. A. Newby ◽  
T. E. Lippert ◽  
M. A. Alvin ◽  
G. J. Bruck ◽  
Z. N. Sanjana ◽  
...  
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Large Scale ◽  
Recent Progress ◽  
Environmental Constraints ◽  
Development Programs ◽  
Key Technology ◽  
Hot Gas ◽  
Filter Test ◽  
Power Generation Systems

Several advanced, coal- and biomass-based combustion turbine power generation technologies are currently under development and demonstration. A key technology component in these power generation systems is the hot gas filter. These power generation technologies must utilize highly reliable and efficient hot gas filter systems to protect the turbine and to meet environmental constraints if their full thermal efficiency and cost potential is to be realized. Siemens Westinghouse Power Corporation (SWPC) has developed a hot gas filter system to near-commercial status for large-scale power generation applications. This paper reviews recent progress made by SWPC in hot gas filter test development programs and in major demonstration programs. Two advanced hot gas filter concepts, the “Inverted Candle” and the “Sheet Filter”, having the potential for superior reliability are also described.

scholarly journals The Spectrum of Proactive, Resilient Multi-Microgrid Scheduling: A Systematic Literature Review

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4543
Author(s):  
Michael Spiegel ◽  
Eric Veith ◽  
Thomas Strasser
Keyword(s):  
Power Systems ◽  
Failure Modes ◽  
Dynamic Network ◽  
Cost Effective ◽  
Great Level ◽  
Full Potential ◽  
Long Run ◽  
Or Groups ◽  
Depth Analysis ◽  
Broad Variety

Multi-microgrids address the need for a resilient, sustainable, and cost-effective electricity supply by providing a coordinated operation of individual networks. Due to local generation, dynamic network topologies, and islanding capabilities of hosted microgrids or groups thereof, various new fault mitigation and optimization options emerge. However, with the great flexibility, new challenges such as complex failure modes that need to be considered for a resilient operation, appear. This work systematically reviews scheduling approaches which significantly influence the feasibility of mitigation options before a failure is encountered. An in-depth analysis of identified key contributions covers aspects such as the mathematical apparatus, failure models and validation to highlight the current methodical spectrum and to identify future perspectives. Despite the common optimization-based framework, a broad variety of scheduling approaches is revealed. However, none of the key contributions provides practical insights beyond lab validation and considerable effort is required until the approaches can show their full potential in practical implementations. It is expected that the great level of detail guides further research in improving and validating existing scheduling concepts as well as it, in the long run, aids engineers to choose the most suitable options regarding increasingly resilient power systems.

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