Remote Power Control Injection of Grid-Connected Power Converters Based on Virtual Flux

Nurul Fazlin Roslan, Alvaro Luna, Joan Rocabert, Jose Ignacio Candela and Pedro Rodriguez
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Nurul Fazlin Roslan: Electrical Engineering Department, Technical University of Catalonia, 08222 Barcelona, Spain
Alvaro Luna: Electrical Engineering Department, Technical University of Catalonia, 08222 Barcelona, Spain
Joan Rocabert: Electrical Engineering Department, Technical University of Catalonia, 08222 Barcelona, Spain
Jose Ignacio Candela: Electrical Engineering Department, Technical University of Catalonia, 08222 Barcelona, Spain
Pedro Rodriguez: Electrical Engineering Department, Technical University of Catalonia, 08222 Barcelona, Spain

Energies, 2018, vol. 11, issue 3, 1-22

Abstract: Renewable Energy Source (RES)-based power plants need to control the active and reactive power at the Point of Common Connection (PCC) with the grid, in order to comply with the requirements of the Transmission System Operators (TSOs). This point is normally far away from the power converter station, and the cables and step-up transformers have a non-neglectable influence on the delivered power. In order to overcome this drawback, this paper presents a control algorithm that permits one to control remotely the power injected at the PCC, by adjusting the local controller of the Voltage Source Converters (VSCs). In this work, the synchronization with the grid is done based on the Virtual Flux (VF) concept. The results reveals that the VF estimation is able to produce a reliable estimation of the grid voltage in any point of the network, and makes it possible to calculate the necessary current reference for injecting a desired active and reactive power at a point that can be some kilometres away. In this paper the main principle for this remote power control is presented. Likewise, the simulation and experimental results will be shown in order to analyse the effectiveness of the proposed system.

Keywords: voltage sensorless; virtual flux estimation; voltage source converter; proportional resonant current controller; LCL-filter; remote point (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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