Comparative study of reactive power control methods for photovoltaic inverters in low-voltage grids

The increasing installation of photovoltaic panels in low-voltage grids causes an over voltage problem, especially during high production and low consumption periods. Generally the over voltage problem is overcome by implementing reactive power control methods. The advances in networked control syst...

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Veröffentlicht in:IET renewable power generation 2016-03, Vol.10 (3), p.310-318
Hauptverfasser: Momeneh, Arash, Castilla, Miguel, Miret, Jaume, Martí, Pau, Velasco, Manel
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container_issue 3
container_start_page 310
container_title IET renewable power generation
container_volume 10
creator Momeneh, Arash
Castilla, Miguel
Miret, Jaume
Martí, Pau
Velasco, Manel
description The increasing installation of photovoltaic panels in low-voltage grids causes an over voltage problem, especially during high production and low consumption periods. Generally the over voltage problem is overcome by implementing reactive power control methods. The advances in networked control systems theory and practice create new scenarios where reactive power control methods can offer additional features and benefits. To explore these new capabilities, this study presents two new reactive power control methods that exploit the networked approach. These two methods are evaluated in a comparative reference framework that also includes the base-line case where no reactive control method is applied, the conventional droop method approach, and a solution based on a near-optimal location of a high power STATCOM derived from one of the new proposed networked methods. The main merit factors used to compare the control methods are the maximum voltage across the distribution grid, the power factor in the point of common coupling, and the total power losses and economic cost of the installation. With these merit factors, the advantages and limitations of the new and existing control methods are revealed and discussed. A useful discussion for selecting the best control solution is also reported.
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source Wiley-Blackwell Open Access Titles
subjects Consumption
Control systems
Coupling
Denmark
Distribució
distribution feeders
distribution networks
distribution-systems
droop method
Electric potential
Energia elèctrica
Energies
generation
high power STATCOM
implementation
invertors
low voltage grids
modules
nearoptimal location
operation
over-voltage problem
Photovoltaic cells
photovoltaic inverters
photovoltaic panels
photovoltaic power systems
point tracking controller
Reactive power
Reactive power (Electrical engineering)
reactive power control
reactive power control method
Solar cells
static VAr compensators
support
total power loss
volt/var control
Voltage
Àrees temàtiques de la UPC
title Comparative study of reactive power control methods for photovoltaic inverters in low-voltage grids
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