Identification of Major Power Quality Disturbance Sources in Regional Grid based on Monitoring Data Correlation Analysis

Liu, Yingying; Xu, Lingling; Zhou, Shengjun; Liu, Yang; Li, Yaqiong; Feng, Dawei

doi:10.1109/powercon.2018.8602140

Cited by 7 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[6,7] Thus, the PQ disturbances are the responsibility of not only utilities but also end-users, manufacturers as well as researchers, and engineers. [8,9] The remarkable growth in research and development work on identifying the avoidable energy losses caused by poor PQ has been observed in recent years [10][11][12][13][14][15][16]. The proper measurements and analysis of the distribution system and implementation of the evolving methods and techniques to improve the condition of the supply system are developing areas of present-day electrical engineering [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Impact of Harmonic Currents of Nonlinear Loads on Power Quality of a Low Voltage Network–Review and Case Study

et al. 2021

View full text Add to dashboard Cite

The paper presents a power-quality analysis in the utility low-voltage network focusing on harmonic currents’ pollution. Usually, to forecast the modern electrical and electronic devices’ contribution to increasing the current total harmonic distortion factor (THDI) and exceeding the regulation limit, analyses based on tests and models of individual devices are conducted. In this article, a composite approach was applied. The performance of harmonic currents produced by sets of devices commonly used in commercial and residential facilities’ nonlinear loads was investigated. The measurements were conducted with the class A PQ analyzer (FLUKE 435) and dedicated to the specialized PC software. The experimental tests show that the harmonic currents produced by multiple types of nonlinear loads tend to reduce the current total harmonic distortion factor (THDI). The changes of harmonic content caused by summation and/or cancellation effects in total current drawn from the grid by nonlinear loads should be a key factor in harmonic currents’ pollution study. Proper forecasting of the level of harmonic currents injected into the utility grid helps to maintain the quality of electricity at an appropriate level and reduce active power losses, which have a direct impact on the price of electricity generation.

show abstract

Section: Introductionmentioning

confidence: 99%

Impact of Harmonic Currents of Nonlinear Loads on Power Quality of a Low Voltage Network–Review and Case Study

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The authors of [30] presented a method to identify the PQ disturbance sources based on the monitoring data correlation between different nodes of the power system. The applied correlation methods were based on, e.g., the Pearson coefficient, the Spearman rank coefficient, or the partial correlation coefficient.…”

Section: Introductionmentioning

confidence: 99%

Combined Correlation and Cluster Analysis for Long-Term Power Quality Data from Virtual Power Plant

Jasiński

2021

Electronics

View full text Add to dashboard Cite

Analysis of the connection between different units that operate in the same area assures always interesting results. During this investigation, the concerned area was a virtual power plant (VPP) that operates in Poland. The main distributed resources included in the VPP are a 1.25 MW hydropower plant and an associated 0.5 MW energy storage system. The mentioned VPP was a source of synchronic, long-term, multipoint power quality (PQ) data. Then, for five related measurement points, the conclusion about the relation in point of PQ was performed using correlation analysis, the global index approach, and cluster analysis. Global indicators were applied in place of PQ parameters to reduce the amount of analyzed data and to check the correlation between phase values. For such a big dataset, the occurrence of outliers is certain, and outliers may affect the correlation results. Thus, to find and exclude them, cluster analysis (k-means algorithm, Chebyshev distance) was applied. Finally, the correlation between PQ global indicators of different measurement points was performed. It assured general information about VPP units’ relation in point of PQ. Under the investigation, both Pearson’s and Spearman’s rank correlation coefficients were considered.

show abstract

“…Destaca-se que a geração eólica vem ganhando espaço segundo os dados da associação brasileira de energia eólica, registrando um crescimento de pouco mais de 14% entre os anos de 2017 e 2018, produzindo um total de 46,47 TWh (Associação Brasileira de Energia Eólica, 2019). No entanto, na geração eólica, por exemplo, os aerogeradores podem se tornar fontes de distúrbios, sobretudo, quando estão em operação junto ao SEP (Liu et al, 2018).…”

Section: Introductionunclassified

Estimação Harmônica via Técnicas de Separação Cega de Fontes Aplicada no Contexto de Geração Eólica

Oliveira

Mattos

Cabral

et al. 2020

Anais Do Congresso Brasileiro De Automática 2020

View full text Add to dashboard Cite

Este trabalho apresenta uma técnica de estimação de componentes harmônicos e interharmônicos baseada em banco de filtros aplicada a um cenário de geração eólica. O projeto dos filtros é adaptativo e utiliza técnicas de separação cega de fontes ajustando as respostas em frequência dos filtros ao conteúdo espectral do sinal de interesse, ou seja, são projetados filtros apenas para os componentes existentes no sinal. Os resultados apresentados mostram a eficiência do método para a estimação de componentes harmônicos e interharmônicos em cenários de falta e variação de carga não linear em uma rede com geração eólica.

show abstract

Identification of Major Power Quality Disturbance Sources in Regional Grid based on Monitoring Data Correlation Analysis

Cited by 7 publications

References 12 publications

Impact of Harmonic Currents of Nonlinear Loads on Power Quality of a Low Voltage Network–Review and Case Study

Impact of Harmonic Currents of Nonlinear Loads on Power Quality of a Low Voltage Network–Review and Case Study

Combined Correlation and Cluster Analysis for Long-Term Power Quality Data from Virtual Power Plant

Estimação Harmônica via Técnicas de Separação Cega de Fontes Aplicada no Contexto de Geração Eólica

Contact Info

Product

Resources

About