Active and Reactive Power Strategies With Peak Current Limitation for Distributed Generation Inverters During Unbalanced Grid Faults

• Published in: IEEE transactions on industrial electronics (1982) Vol. 62; no. 3; pp. 1515 - 1525
• Main Authors: Camacho, Antonio, Castilla, Miguel, Miret, Jaume, Borrell, Angel, Garcia de Vicuna, Luis
• Format: Journal Article Publication
• Language: English
• Published: IEEE 01.03.2015; Institute of Electrical and Electronics Engineers (IEEE)
• Subjects: Active damping; Aerogeneradors; Automatització i control de l'energia elèctrica; Circuits de potència; Connected converters; Control automàtic; Control scheme; Dips; Distribució; Distributed generation of electric power; Electric inverters; Electrònica de potència; Energia elèctrica; Energia eòlica; Energia solar fotovoltaica; Energies; Enginyeria electrònica; Filter; Generators; Grid fault; Instal·lacions solars de baixa potència connectades a la xarxa; Inverters; Low-Voltage ride; Low-voltage ride-through; Peak current; Plants; Power control; Power system stability; Production; Reactive power; Reference generator; Reguladors de voltatge; Reguladors elèctrics; Synchronization; Systems; Voltage control; Voltage fluctuations; Voltage regulators; Voltage sag; Wind turbines; Àrees temàtiques de la UPC; Grid fault; peak current; power control; low-voltage ride-through; reference generator; voltage sag
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2014.2347266

Distributed generation inverters have become a key element to improve grid efficiency and reliability, particularly during grid faults. Under these severe perturbations, inverter-based power sources should accomplish low-voltage ride-through requirements in order to keep feeding the grid and support the grid voltage. Also, rated current can be required to better utilize reactive power provisions. This paper presents a reference generator capable to accomplish these two objectives: to keep the injected currents within safety values and to compute the power references for a better utilization of the inverter power capacity. The reference generator is fully flexible since positive and negative active and reactive powers can be simultaneously injected to improve ride-through services. Selected experimental results are reported to evaluate the performance of the proposed reference generator under different control strategies.