High-frequency resonance overvoltages in distribution network with large photovoltaic power plant

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

High-frequency resonance overvoltages in distribution network with large photovoltaic power plant

Popis výsledku v původním jazyce

The wide usage of power electronics and distributed resources in modern power systems bring new challenges for power quality and stability. Switching of power electronic components produces a wide spectrum of voltage and current interferences which are superimposed on power frequency. High-frequency components are usually monitored and filtered up to 40th harmonic under many technical standards. However significant harmonics and impulses with fundamental frequencies up to tens of kilohertz can arise in power systems as a consequence of mutual interaction between passive parameters (resistance, inductance, and capacitance) of the distribution network and switching of power electronic devices. These components on voltage deal repetitive significant overvoltages which excessively stress insulation systems of medium and high voltage devices. The theoretical study presented here is based on numerical simulation to prove the development and propagation of the high-frequency harmonic distortions produced by a large photovoltaic power plant. The modeled power plant consists of some smaller power units with filters and own power transformers which operate in parallel into medium voltage distribution level. The medium voltage distribution system contains self-consumption, cable and overhead power lines and connection to the high voltage transmission system via power transformer. All modeled components are substituted by extended equivalent circuits respecting the propagation of high-frequency components of currents and voltages. Sensitivity analyses of some parameters of the distribution network to the formation of high-frequency distortions were carried out and discussed.

Název v anglickém jazyce

High-frequency resonance overvoltages in distribution network with large photovoltaic power plant

Popis výsledku anglicky

The wide usage of power electronics and distributed resources in modern power systems bring new challenges for power quality and stability. Switching of power electronic components produces a wide spectrum of voltage and current interferences which are superimposed on power frequency. High-frequency components are usually monitored and filtered up to 40th harmonic under many technical standards. However significant harmonics and impulses with fundamental frequencies up to tens of kilohertz can arise in power systems as a consequence of mutual interaction between passive parameters (resistance, inductance, and capacitance) of the distribution network and switching of power electronic devices. These components on voltage deal repetitive significant overvoltages which excessively stress insulation systems of medium and high voltage devices. The theoretical study presented here is based on numerical simulation to prove the development and propagation of the high-frequency harmonic distortions produced by a large photovoltaic power plant. The modeled power plant consists of some smaller power units with filters and own power transformers which operate in parallel into medium voltage distribution level. The medium voltage distribution system contains self-consumption, cable and overhead power lines and connection to the high voltage transmission system via power transformer. All modeled components are substituted by extended equivalent circuits respecting the propagation of high-frequency components of currents and voltages. Sensitivity analyses of some parameters of the distribution network to the formation of high-frequency distortions were carried out and discussed.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

10th International Scientific Symposium on Electrical Power Engineering, ELEKTROENERGETIKA 2019

ISBN

9788055333243

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

529-534

Název nakladatele

TU Košice, FEI

Místo vydání

Košice

Místo konání akce

Stará Lesná

Datum konání akce

16. 9. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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