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A Novel Real-Time Energy Management Strategy for Gird-Friendly Microgrid Harnessing Internal Fluctuation Internally

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Document pages: 6 pages

Abstract: Typically, a large portion of microgrid generating capacity is from variablerenewable resources that are greatly impacted by the environment and can beintermittent as well as stochastic. This would result in uncertainty ofmicrogrid net-load, and negatively affect the grid reliability. A two-phasereal-time energy management strategy for networked microgrid is proposed inthis paper to address microgrid internal fluctuation internally, which enablesa microgrid to become grid-friendly. The proposed strategy is based oncoordination between the real-time dispatch (RTD) phase and the real-timecontrol (RTC) phase. In the RTD phase, model predictive control (MPC) is usedto optimally dispatch microgrid resources in the current time interval whileconsidering near future situations. The RTC phase addresses microgrid internalnet-load fluctuation with fast-acting batteries, which aims to maintain aconstant tie-line power flow between the main grid and the microgrid for thecurrent dispatch interval. Numerical simulations conducted on ten differentnet-load scenarios can demonstrate the performance of the proposed two-phaseenergy management strategy that will enable a microgrid to operate as acontrollable asset with static electricity consumption or production in aneconomic dispatch interval from the perspective of the bulk grid operator.

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