Distributed Strategy for Optimal Dispatch of Unbalanced Three-Phase Islanded Microgrids

Autor(es)

Vergara, Pedro P. ^[1] ; Rey, Juan M. ^[2] ; Shaker, Hamid R. ^[3] ; Guerrero, Josep M. ^[4] ; Jorgensen, Bo Norregaard ^[3] ; da Silva, Luiz C. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Syst & Energy, BR-13083852 Campinas, SP - Brazil

^[2] Univ Ind Santander, Escuela Ingn Elect Elect & Telecomunicac, Bucaramanga 680002 - Colombia

^[3] Univ Southern Denmark, Ctr Energy Informat, DK-5230 Odense - Denmark

^[4] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg - Denmark

• Tipo de documento: Artigo Científico
• Fonte: IEEE TRANSACTIONS ON SMART GRID; v. 10, n. 3, p. 3210-3225, MAY 2019.
• Citações Web of Science: 3

Resumo

This paper presents a distributed strategy for the optimal dispatch of islanded microgrids, modeled as unbalanced three-phase electrical distribution systems. To set the dispatch of the distributed generation (DG) units, an optimal generation problem is stated and solved distributively based on primal-dual constrained decomposition and a first-order consensus protocol, where units can communicate only with their neighbors. Thus, convergence is guaranteed under the common convexity assumptions. The islanded microgrid operates with the standard hierarchical control scheme, where two control modes are considered for the DG units: a voltage control mode, with an active droop control loop, and a power control mode, which allows setting the output power in advance. To assess the effectiveness and flexibility of the proposed approach, simulations were performed in a 25-bus unbalanced three-phase microgrid. According to the obtained results, the proposed strategy achieves a lower cost solution when compared with a centralized approach based on a static droop framework, with a considerable reduction on the communication system complexity. Additionally, it corrects the mismatch between generation and consumption even during the execution of the optimization process, responding to changes in the load consumption, renewable generation, and unexpected faults in units. (AU)

• Processo FAPESP: 15/09136-8 - Otimização de um portfólio tolerante a faltas em um cenário de Smart Grid
• Beneficiário: Pedro Pablo Vergara Barrios
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/04164-6 - Otimização de um portfólio tolerante a faltas em um cenário de Smart Grid
• Beneficiário: Pedro Pablo Vergara Barrios
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado