scholarly journals Measurement of 2-150 kHz Conducted Emissions in Power Networks

2021 ◽  
Author(s):  
Deborah Ritzmann ◽  
Paul Wright ◽  
Jan Meyer ◽  
Victor Khokhlov ◽  
David De la Vega ◽  
...  
Keyword(s):  
Power Grid ◽  
Measurement Methods ◽  
Frequency Range ◽  
Power Networks ◽  
Comparison Results ◽  
Alternative Approaches ◽  
Conducted Emissions

A framework for the comparison of measurement methods of conducted emissions in the frequency range 2-150 kHz is presented. In addition to present non-normative methods published by the IEC, alternative approaches in the literature are considered. Furthermore, test signals and key metrics are described. The comparison results will provide a baseline for specification of a new normative method for power grid measurements.

scholarly journals Measurement of 2-150 kHz Conducted Emissions in Power Networks

2021 ◽  
Author(s):  
Deborah Ritzmann ◽  
Paul Wright ◽  
Jan Meyer ◽  
Victor Khokhlov ◽  
David De la Vega ◽  
...  
Keyword(s):  
Power Grid ◽  
Measurement Methods ◽  
Frequency Range ◽  
Power Networks ◽  
Comparison Results ◽  
Alternative Approaches ◽  
Conducted Emissions

A framework for the comparison of measurement methods of conducted emissions in the frequency range 2-150 kHz is presented. In addition to present non-normative methods published by the IEC, alternative approaches in the literature are considered. Furthermore, test signals and key metrics are described. The comparison results will provide a baseline for specification of a new normative method for power grid measurements.

scholarly journals A Digital Heterodyne 2-150 kHz Measurement Method

2021 ◽  
Author(s):  
Paul Wright ◽  
Deborah Ritzmann
Keyword(s):  
Measurement Method ◽  
Power Grid ◽  
New Method ◽  
Digital Method ◽  
Frequency Range ◽  
Multi Resolution Analysis ◽  
Resolution Analysis ◽  
Conducted Emissions

This paper describes a new method for measurements of signals in the 2–150 kHz frequency range, as required to support the regulation of conducted emissions on the power grid. The digital method is based on heterodyning, decimation and multi resolution analysis.<div><br></div>

scholarly journals A Digital Heterodyne 2-150 kHz Measurement Method

2021 ◽  
Author(s):  
Paul Wright ◽  
Deborah Ritzmann
Keyword(s):  
Measurement Method ◽  
Power Grid ◽  
New Method ◽  
Digital Method ◽  
Frequency Range ◽  
Multi Resolution Analysis ◽  
Resolution Analysis ◽  
Conducted Emissions

This paper describes a new method for measurements of signals in the 2–150 kHz frequency range, as required to support the regulation of conducted emissions on the power grid. The digital method is based on heterodyning, decimation and multi resolution analysis.<div><br></div>

scholarly journals Comparison of Measurement Methods for 2–150-kHz Conducted Emissions in Power Networks

2021 ◽  
Vol 70 ◽  
pp. 1-10
Author(s):  
Deborah Ritzmann ◽  
Stefano Lodetti ◽  
David de la Veg ◽  
Victor Khokhlov ◽  
Alexander Gallarreta ◽  
...  
Keyword(s):  
Measurement Methods ◽  
Power Networks ◽  
Conducted Emissions

New aspects of power grid facilities personnel workplaces electromagnetic environment

2020 ◽  
Vol 60 (9) ◽  
pp. 569-574
Author(s):  
Nina B. Rubtsova ◽  
Sergey Yu. Perov ◽  
Olga V. Belaya ◽  
Tatiana A. Konshina
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Power Grid ◽  
Spectral Characteristics ◽  
Ground Level ◽  
Frequency Characteristics ◽  
Frequency Range ◽  
Electromagnetic Environment ◽  
Limit Values ◽  
Special Assessment

Introduction. Electromagnetic safety of power grid facilities staff requires the exclusion of electromagnetic fields (EMF) harmful effects. EMF is evaluated by 50 Hz electric and magnetic fields (EF and MF) values in the framework of working conditions special assessment, and very rarely the analysis of the electromagnetic environment (EME) is carried out in depth. The aim of the study - EME hygienic assessment of power grid EHV facilities personnel workplace with adequate 50 Hz EF and MF levels evaluation as well as the analysis of EF and MF in the frequency range from 5 Hz to 500 Hz amplitude-frequency characteristics. Materials and methods. 50 Hz EF and MF values assessment was carried out on open switchgears (S) of substations and within sanitary breaks of 500 and 750 kV overhead power transmission lines (OTL). Measurements along to OTL trasses was performed using matrix-based method. Measurements and analysis of EF and MF values in 5-500 Hz frequency range amplitude-frequency characteristics were performed in the territory of 500 and 750 kV S. Results. Power frequency 50 Hz measurements results at 500 and 750 kV S ground-level personnel workplaces showed the presence of an excess of permissible limit values by EF intensity and the absence of an excess by MF. The measured EF values within 500 and 750 kV OTL sanitary gaps require limiting the working time of linemen due to the excess of the hygienic norms for full work shift, while the MP levels were almost completely within the standard values for persons not occupationally connected with electrical installations maintenance. MF and EE frequency range from 50 Hz to 500 Hz spectral characteristics analysis showed that 3rd harmonic percentage does not exceed 2.5% for EF and 6% for MF of the main level, the level of the 5th harmonic does not exceed 1% for EF and 3.5% for MF, the level of the 7th harmonic does not exceed 0.2% for EF and 0.8% for MF. These data show despite its low levels the contribution of MF different harmonics in a possible adverse impact on humane than EF corresponding harmonics. Conclusions. There was the confirmation of the previously justified use of the "matrix" scheme for of EF and MF values measurement along OTL routes. The relevance of to EF and MF all frequency components expos ure assessing possible health risk in extremely high voltage S territories and under OTL, based on international recommendations due to the lack of sanitary regulations in the Russian Federation for >50 Hz-30 kHz EF and MF, is shown.

APPLICATION OF MEASUREMENT METHODS FOR THE FREQUENCY RANGE 2-150 KHZ TO LONG-TERM MEASUREMENTS IN PUBLIC LOW VOLTAGE NETWORKS

2021 ◽  
Author(s):  
V. Khokhlov ◽  
J. Meyer ◽  
D. Ritzmann ◽  
S. Lodetti ◽  
P. S. Wright ◽  
...  
Keyword(s):  
Low Voltage ◽  
Measurement Methods ◽  
Frequency Range

scholarly journals A Novel Method for Economic Dispatch with Across Neighborhood Search: A Case Study in a Provincial Power Grid, China

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-18 ◽  
Author(s):  
Guojiang Xiong ◽  
Jing Zhang ◽  
Xufeng Yuan ◽  
Dongyuan Shi ◽  
Yu He ◽  
...  
Keyword(s):  
Power Grid ◽  
Economic Dispatch ◽  
Optimal Solution ◽  
Inequality Constraints ◽  
Search Space ◽  
Neighborhood Search ◽  
Solution Quality ◽  
Promising Alternative ◽  
Comparison Results ◽  
Population Based Algorithm

Economic dispatch (ED) is of cardinal significance for the power system operation. It is mathematically a typical complex nonlinear multivariable strongly coupled optimization problem with equality and inequality constraints, especially considering the valve-point effects. In order to effectively solve the problem, a simple yet very young and efficient population-based algorithm named across neighborhood search (ANS) is implemented in this paper. In ANS, a group of individuals collaboratively navigate through the search space for obtaining the optimal solution by simultaneously searching the neighborhoods of multiple superior solutions. Four benchmark test cases with diverse complexities and characteristics are firstly employed to comprehensively verify the feasibility and effectiveness of ANS. The experimental and comparison results fully demonstrate the superiority of ANS in terms of the final solution quality, convergence speed, robustness, and statistics. In addition, the sensitivities of ANS to variations of population size and across-search degree are studied. Furthermore, ANS is applied to a practical provincial power grid of China. All the comparison results consistently indicate that ANS is highly competitive and can be used as a promising alternative for ED problems.

scholarly journals Energy Saving Measurement Methods in Power Grid Engineering

2018 ◽  
Vol 170 ◽  
pp. 042161
Author(s):  
Dapin Zhang ◽  
Yeshen He ◽  
Qinghai Ou ◽  
Jingjing Zheng ◽  
Yiying Zhang
Keyword(s):  
Energy Saving ◽  
Power Grid ◽  
Measurement Methods
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