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Economic allocation of active power in microgrids

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Economic allocation of active power in microgrids [PDF]

6 FAQs about [Economic allocation of active power in microgrids]

Which model is used to optimize microgrids?

Model 1: Only active optimization is considered, coordinating the microgrids to affect the power flow. Model 2: Uses coordinated active and reactive power optimization, coordinating microgrids and reactive devices to affect power flow. Model 3: Based on Model 2, the reactive power support of microgrid to distribution network is further considered.

How can the reactive output of a microgrid be adjusted?

The reactive output of the microgrid can be adjusted according to the reactive load to achieve local reactive power balance and provide certain reactive support for the upper distribution network (Fig. 28).

How are optimal allocation decisions made for a microgrid?

In the first stage, the optimal allocation decisions are made before the actual realisation of the operational uncertainties. In the second stage, the optimal operation strategies are made for the microgrid by minimising the costs paid to the main grid, fuel cells, MTs, BESSs and controllable loads (CLs).

What are the problems of microgrids?

Inappropriate active and reactive power flows in distribution systems contribute to increase losses, voltage drops, and grid instability. These problems are more evident in isolated microgrids where the system’s references (e.g, voltage and frequency set points) are not provided by the main grid.

Does distributed power optimization work in large-scale grid scenarios?

In summary, through the coordinated active and reactive power optimization of microgrids, it is verified that the distributed optimization method based on MAAC proposed in this paper can also give reasonable decision actions in large-scale grid scenarios.

Does a microgrid reduce network loss?

The reactive power provided by the microgrid will further reduce the network loss of the distribution network. Based on the original draft, the reactive power support of the microgrid is added in this paper, and the network loss is further reduced by 13.76% compared with that without considering the reactive power support of the microgrid.