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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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UPCommons - E-prints UPC Universitat Politècnica de Catalunya   


Demirok, Erhan -  Casado Gonzalez, P. -  Frederiksen, K.H.B. -  Sera, Dezso -  Rodríguez Cortés, Pedro -  Teodorescu, Remus - 

Id.: 55311870

Idioma: inglés  - 

Versión: 1.0

Estado: Final

Tipo:  9 p. - 

Palabras claveÀrees temàtiques de la UPC -  Energies -  Energia solar fotovoltaica -  Instal·lacions solars de baixa potència connectades a la xarxa - 

Tipo de recurso: Article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: Restricted access - publisher's policy

Formatos:  9 p. - 

Requerimientos técnicos:  Browser: Any - 

Relación: [References] http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6096349&tag=1

Fecha de contribución: 05-may-2013


* Demirok, E. [et al.]. Local reactive power control methods for overvoltage prevention of distributed solar inverters in low-voltage grids. "Progress in photovoltaics", 27 Desembre 2011, vol. 1, núm. 2, p. 174-182.
* 1062-7995
* 10.1109/JPHOTOV.2011.2174821

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