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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F19%3A00332521" target="_blank" >RIV/68407700:21230/19:00332521 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20201 - Electrical and electronic engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2019

Confidentiality

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

Article name in the collection

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

ISBN

9788055333243

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

529-534

Publisher name

TU Košice, FEI

Place of publication

Košice

Event location

Stará Lesná

Event date

Sep 16, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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