Voltage fluctuations in networks with distributed power sources

Mróz, Maciej; Chmielowiec, Krzysztof; Hanzelka, Zbigniew

doi:10.1109/ichqp.2012.6381206

Cited by 7 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most devices are sensitive Energies 2024, 17, 623 2 of 17 to voltage fluctuations, especially voltage dips [9,10]. Currently, the applicable regulations require that the voltage fluctuations caused by sources at their point of connection (PCC) do not exceed 3% of the rated network voltage [11][12][13]. Various methods of reducing voltage fluctuations from photovoltaic installations by reducing fluctuations in photovoltaic output power are described in the literature.…”

Section: Changes In the Value Of The Supply Voltagementioning

confidence: 99%

Analysis of the Impact of a Photovoltaic Farm on Selected Parameters of Power Quality in a Medium-Voltage Power Grid

Hołdyński,

Skibko,

Firlit

et al. 2024

Energies

View full text Add to dashboard Cite

Over the last few years, a dynamic increase in the installed capacity of distributed energy sources has been observed, with the largest share being photovoltaic sources. The power grid is a system of connected vessels, and changing the structure of electricity production has a specific impact on the operation of this network, which makes it necessary to study the impact of the sources on the power system. The current and projected increase in the number of connected installations will make the issues of interaction and cooperation of distributed sources with the network extremely important. The article presents an analysis of the impact of a photovoltaic farm on selected parameters of the quality of electricity supply. This analysis was made on the basis of simulation results in a computer program and measurement tests carried out on a real photovoltaic farm with a capacity of 1.8 MW connected to the medium voltage power grid. The impact of the farm-generated power on the values of fundamental indicators of the quality of electricity supply, such as voltage deviations, voltage asymmetry factors, and voltage distortions factors, is presented. These relationships were determined based on the correlation and regression analysis of individual electrical quantities.

show abstract

Section: Changes In the Value Of The Supply Voltagementioning

confidence: 99%

Analysis of the Impact of a Photovoltaic Farm on Selected Parameters of Power Quality in a Medium-Voltage Power Grid

Hołdyński,

Skibko,

Firlit

et al. 2024

Energies

View full text Add to dashboard Cite

show abstract

“…The investigations devoted to hybrid systems are not so common as those dedicated to a single RES. Most of the papers on electricity generation and parameters determining the power quality of renewable sources are devoted either to photovoltaic power plants [10][11][12][13][14][15][16][17] or wind power plants [18][19][20]. The spectrum of the considered problems is wide.…”

mentioning

confidence: 99%

“…The analysis concerning the impact of the wind power plant on the power grid in terms of the power quality has been also shown in [19]. One of the most important problems consists in voltage fluctuations which have been studied in [20].…”

mentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Lange,

Pasko,

Grabowski

2021

View full text Add to dashboard Cite

The connection of renewable energy sources with significant nominal power (in the order of MW) to the medium-voltage distribution grid affects the operating conditions of that grid. Due to the increasing number of installed renewable energy sources and the limited transmission capacity of medium-voltage networks, the cooperation of these energy sources is becoming increasingly important. This article presents the results of a six-year study on a 2 MW wind power plant and a 1 MW photovoltaic power plant in the province of Warmia and Mazury, which are located a few kilometers away from each other. In this study, active energy, currents, voltages as well as active, reactive, and apparent power and higher harmonics of currents and voltages were measured. The obtained results show the parameters determining the power quality at different load levels. Long-term analysis of the operation of these power plants in terms of the generated electricity and active power transmitted to the power grid facilitated estimating the repeatability of active energy production and the active power generated in individual months of the year and times of day by a wind power plant and a photovoltaic power plant. It also allowed us to assess the options of cooperation between these energy sources. It is important, not only from a technical but also from an economic point of view, to determine the nominal power of individual power plants connected to the same connection point. Therefore, the cooperation of two such power plants with the same nominal power of 2 MW was analyzed and the economic losses caused by a reduction in electricity production resulting from connection capacity were estimated.

show abstract

Offshore Wind Farm-Grid Integration: A Review on Infrastructure, Challenges, and Grid Solutions

et al. 2021

View full text Add to dashboard Cite

Recently, the penetration of renewable energy sources (RESs) into electrical power systems is witnessing a large attention due to their inexhaustibility, environmental benefits, storage capabilities, lower maintenance and stronger economy, etc. Among these RESs, offshore wind power plants (OWPP) are ones of the most widespread power plants that have emerged with regard to being competitive with other energy technologies. However, the application of power electronic converters (PECs), offshore transmission lines and large substation transformers result in considerable power quality (PQ) issues in grid connected OWPP. Moreover, due to the installation of filters for each OWPP, some other challenges such as voltage and frequency stability arise. In this regard, various customs power devices along with integration control methodologies have been implemented to deal with stated issues. Furthermore, for a smooth and reliable operation of the system, each country established various grid codes. Although various mitigation schemes and related standards for OWPP are documented separately, a comprehensive review covering these aspects has not yet addressed in the literature. The objective of this study is to compare and relate prior as well as latest developments on PQ and stability challenges and their solutions. Low voltage ride through (LVRT) schemes and associated grid codes prevalent for the interconnection of OWPP based power grid have been deliberated. In addition, various PQ issues and mitigation options such as FACTS based filters, DFIG based adaptive and conventional control algorithms, ESS based methods and LVRT requirements have been summarized and compared. Finally, recommendations and future trends for PQ improvement are highlighted at the end.INDEX TERMS Frequency control, Grid codes, harmonics, LVRT, offshore wind energy, power quality, stability, voltage control.

show abstract

Voltage fluctuations in networks with distributed power sources

Cited by 7 publications

References 5 publications

Analysis of the Impact of a Photovoltaic Farm on Selected Parameters of Power Quality in a Medium-Voltage Power Grid

Analysis of the Impact of a Photovoltaic Farm on Selected Parameters of Power Quality in a Medium-Voltage Power Grid

Bulletin of the Polish Academy of Sciences: Technical Sciences

Offshore Wind Farm-Grid Integration: A Review on Infrastructure, Challenges, and Grid Solutions

Contact Info

Product

Resources

About