Journal
IEEE TRANSACTIONS ON SMART GRID
Volume 3, Issue 4, Pages 1977-1987Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSG.2012.2205952
Keywords
Centralized control; distributed generation; energy management; microgrids; parallel inverter operation
Categories
Funding
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
- A*STAR under the Smart Grid Project (SERC Grant) [112 120 2022]
- HKU CRCG Fund [201111159110]
- NNSFC [61004093]
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This paper presents a centralized control system that coordinates parallel operations of different distributed generation (DG) inverters within a microgrid. The control design for the DG inverters employs a new Model Predictive Control algorithm that allows faster computational time for large power systems by optimizing the steady-state and the transient control problems separately. An overall energy management system is also implemented for the microgrid to coordinate load sharing among different DG units during both grid-connected and islanded operations. The design concept of the proposed control system is evaluated through simulation studies under different test scenarios. The impact of the increased penetration of DG units on the distribution grid is also investigated using the proposed microgrid. The simulation results show that the operations of the DG units within the microgrid can be coordinated effectively under the proposed control system to ensure stable operation of the overall microgrid.
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