Cooperative regulation of imbalances in three-phase four-wire microgrids using single-phase droop control and secondary control algorithms
Access noteAcceso Abierto
MetadataShow full item record
Collaborative control of power converters operating in microgrids with unbalanced single-phase loads is difficult to achieve, considering that the voltages and currents have positive-, negative-, and zero-sequence components. In this paper, a new control scheme for collaborative control of four-leg microgrids is proposed. The main advantage of the proposedmethodology is simplicity, because the sharing of the powers produced by the positive-, negative-, and zero-sequence voltage and currents is simple to achieve using the easy to implement and well-known droop control algorithms, i.e., as those based onP-. andQ-v droop control. The proposed droop algorithms do not require high bandwidth communication channels and the application of virtual impedances, whose design usually demands extensive simulation work, is not required. Three secondary control systems are also analyzed, discussed, and implemented in this paper to regulate the frequency, voltage, and phase at the point of common coupling (PCC), to achieve a balanced 50-Hz three-phase voltage supply in the PCC during steadystate operation. For these secondary control systems, single-phase phase-locked loop based on quadrature signal generators are implemented. Small signal modeling and design are discussed in this paper. A microgrid prototype of similar to 5 kW, implemented using two power converters of 3 kW(each), is used to experimentally validate the proposed algorithms.
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT) CONICYT FONDECYT 1170683 Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT PIA/BASAL FB0008 CONICYT-PIA-FB0816 CONICYT-PCHA/Doctorado Nacional/2017-21171858
Artículo de publicación ISI
Quote ItemIEEE Transactions on Power Electronics. Vol. 35 (2): 1978-1992
The following license files are associated with this item: