OVERVOLTAGE PROTECTION OF PV MICROINSTALLATIONS – REGULATORY REQUIREMENTS AND SIMULATION MODEL
Klara Janiga
k.janiga@pollub.plLublin University of Technology, Faculty of Electrical Engineering and Computer Science, Lublin, Poland (Poland)
http://orcid.org/0000-0002-1798-0434
Abstract
In low-voltage power networks with a large share of distributed energy sources, the phenomenon of overvoltage is increasingly observed. Although it may be desirable to raise the voltage value downstream of the network, in some cases the upper allowable voltage limit is exceeded. The method of eliminating voltage rises commonly used in the Polish power system is the installation of overvoltage protections, disconnecting the source from the grid. Such action reduces the profitability of prosumer installations, discouraging future potential investors. It turns out, however, that this is not the only disadvantage of such a solution. Sudden and uncoordinated disconnections and reconnections of more energy sources cause abrupt voltage changes that negatively affect the voltage conditions in the network. The aim of the paper is to present the operating algorithms of a standard overvoltage relay used in inverters of photovoltaic microinstallations. These algorithms – described in standards and national regulations – were tested in a typical inverter used in public low-voltage networks and implemented in the created simulation model of the relay. The described tests will be used for further work to demonstrate the need to coordinate the operation of overvoltage protections or replace them with other measures to improve voltage conditions in the grid with high share of photovoltaic sources.
Keywords:
overvoltage protection, distributed power generation, photovoltaic systems, power distribution linesReferences
Appen J. et al.: Time in the sun: The challenge of high PV penetration in the German electric grid. IEEE Power and Energy Magazine 11(2), 2013, 55–64 [http://doi.org/10.1109/MPE.2012.2234407].
DOI: https://doi.org/10.1109/MPE.2012.2234407
Google Scholar
Hashemi S., Østergaard J.: Methods and strategies for overvoltage prevention in low voltage distribution systems with PV. IET Renewable Power Generation 11(2), 2017, 55–64 [http://doi.org/10.1049/IET-PG.2016.0277].
DOI: https://doi.org/10.1049/iet-rpg.2016.0277
Google Scholar
Janiga K.: A review of voltage control strategies for low-voltage networks with high penetration of distributed generation. Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska – IAPGOS 3, 2020, 60–65 [http://doi.org/10.35784/iapgos.1928].
DOI: https://doi.org/10.35784/iapgos.1928
Google Scholar
Mahmud N., Zahedi A.: Review of control strategies for voltage regulation of the smart distribution network with high penetration of renewable distributed generation. Renewable and Sustainable Energy Reviews 64/2016, 582–595 [http://doi.org/10.1016/j.rser.2016.06.030].
DOI: https://doi.org/10.1016/j.rser.2016.06.030
Google Scholar
Renewable Energy Sources Act of February 20/2015, Dz. U. 2015 poz. 478
Google Scholar
Commission Regulation (EU) 2016/631 of April 14, 2016 establishing the EU network code.
Google Scholar
Instruction of Distribution Network Operation and Maintenance (IRiESD), PGE Dystrybucja S.A.
Google Scholar
PN-EN 50160:2010 Parametry napięcia zasilającego w publicznych sieciach elektroenergetycznych.
Google Scholar
PN-EN 50549-1:2019-02 Wymagania dla instalacji wytwórczych przeznaczonych do równoległego przyłączania do publicznych sieci dystrybucyjnych.
Google Scholar
PN-EN 50438:2014-02 Wymagania dla instalacji mikrogeneracyjnych przeznaczonych do równoległego przyłączania do publicznych sieci dystrybucyjnych niskiego napięcia.
Google Scholar
PN-EN 61000-4-30: 2015-05 Kompatybilność elektromagnetyczna (EMC) - Część 4-30: Metody badań i pomiarów - Metody pomiaru jakości energii.
Google Scholar
Set of requirements for type A power generating modules, including microinstallations, PGE Dystrybucja S.A.
Google Scholar
Authors
Klara Janigak.janiga@pollub.pl
Lublin University of Technology, Faculty of Electrical Engineering and Computer Science, Lublin, Poland Poland
http://orcid.org/0000-0002-1798-0434
Statistics
Abstract views: 249PDF downloads: 239
License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Most read articles by the same author(s)
- Klara Janiga, A REVIEW OF VOLTAGE CONTROL STRATEGIES FOR LOW-VOLTAGE NETWORKS WITH HIGH PENETRATION OF DISTRIBUTED GENERATION , Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska: Vol. 10 No. 3 (2020)
