Bidirectional Power Flow Controllability of Inverter-Dominated Radial Microgrids Incorporating Harmonic Mitigation Capabilities

Author(s)

dos Santos Alonso, Augusto Matheus ; IEEE

• Document type: Journal article
• Source: 2023 IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION, APEC; v. N/A, p. 7-pg., 2023-01-01.

Abstract

As a consequence of having a singular point of interconnection with the upstream grid, a grid-connected radial microgrid (MG) can support ancillary functionalities by steering its multiple power electronic inverters to achieve controllability over the power flow. Nonetheless, pure active and reactive power dispatchability at the MG's point of interconnection is difficult to be achieved due to distortion currents drawn by existing nonlinear loads. This paper presents a control strategy applied to grid-connected radial MGs, allowing to coordinate their inverters to regulate the dispatch of the active and reactive powers while concomitantly offering distributed compensation of harmonic currents. Thus, the MG operates as a single-controllable entity, and its power dispatch can support demand response without propagating harmonics to the upstream grid. The effectiveness of the power flow regulation and harmonic mitigation are demonstrated by experimental results in a single-phase MG prototype considering two inverters and multiple loads. (AU)

• FAPESP's process: 17/24652-8 - Development of a methodology for cooperative control of distributed generators in microgrids with multiple operational considerations
• Grantee: Augusto Matheus dos Santos Alonso
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 22/15185-5 - 2023 Applied Power Electronics Conference (APEC)
• Grantee: Augusto Matheus dos Santos Alonso
• Support Opportunities: Research Grants - Meeting - Abroad
• FAPESP's process: 16/08645-9 - Interdisciplinary research activities in electric smart grids
• Grantee: João Bosco Ribeiro do Val
• Support Opportunities: Research Projects - Thematic Grants