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Títol:
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Local reactive power control methods for overvoltage prevention of distributed solar inverters in low-voltage grids
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Autor/a:
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Demirok, Erhan; Casado Gonzalez, P.; Frederiksen, K.H.B.; Sera, Dezso; Rodríguez Cortés, Pedro; Teodorescu, Remus
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Altres autors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica; Universitat Politècnica de Catalunya. SEER - Sistemes Elèctrics d'Energia Renovable |
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Abstract:
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The main objective of this study is to increase the penetration
level of photovoltaic (PV) power production in low-voltage
(LV) grids by means of solar inverters with reactive power control
capability. This paper underlines weak points of standard reactive
power strategies which are already imposed by certain grid
codes, and then, the study introduces a new reactive power control
method that is based on sensitivity analysis. The sensitivity analysis
shows that the same amount of reactive power becomes more
effective for grid voltage support if the solar inverter is located
at the end of a feeder. Based on this fundamental knowledge, a
location-dependent power factor set value can be assigned to each
inverter, and the grid voltage support can be achieved with less
total reactive power consumption. In order to prevent unnecessary
reactive power absorption from the grid during admissible voltage
range or to increase reactive power contribution from the inverters
that are closest to the transformer during grid overvoltage condition,
the proposed method combines two droop functions that are
inherited from the standard cosϕ(P) and Q(U) strategies. Its performance
comparison in terms of grid losses and voltage variation
with different reactive power strategies is provided by modeling
and simulating a real suburban LV network. |
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Abstract:
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Peer Reviewed |
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Matèries:
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-Àrees temàtiques de la UPC::Energies::Energia solar fotovoltaica::Instal·lacions solars de baixa potència connectades a la xarxa
-Àrees temàtiques de la UPC::Energies::Energia elèctrica::Automatització i control de l'energia elèctrica
-Solar energy
-Photovoltaic power systems
-Photovoltaic power generation
-Distributed generation of electric power
-Energia solar fotovoltaica
-Sistemes elèctrics de potència
-Convertidors de corrent elèctric
-Energia elèctrica -- Distribució |
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Drets:
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Tipus de document:
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Article - Versió publicada
Article |
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Compartir:
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