Operation Comparison of Multi-Microgrid and Microgrid Group Under Time-of-Use Electricity Price

Wenqin NING; Shuxia YANG

doi:10.16513/j.2096-2185.DE.2106540

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Distributed Energy ›› 2021, Vol. 6 ›› Issue (5) : 10-17. DOI: 10.16513/j.2096-2185.DE.2106540

Basic Research

Operation Comparison of Multi-Microgrid and Microgrid Group Under Time-of-Use Electricity Price

Wenqin NING ¹ ,
Shuxia YANG ¹^,²

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Abstract

The key to the sustainable development of regional multi microgrid system is to choose a reasonable operation mode. With the goal of maximizing the profit of microgrid operators, the profit model of multi-microgrid mode and microgrid group mode are constructed under time-of-use (TOU) electricity price. Then, three microgrids are taken as examples for simulation calculation, and the results show that in a typical day, the operating profit of microgrid group is 12% higher than that of multi-microgrid. In addition, under the microgrid group operation mode, the power purchased by the whole system from the external power grid is reduced by 35%, and the power sold is reduced by 49%, and the utilization rate of energy storage system (ESS) is effectively improved. The results show that: when multiple microgrids adopt the group operation mode, it can effectively reduce its dependence on the grid; reduce the impact on the grid caused by frequent access to the grid; improve the utilization rate of renewable energy. The research results provide a reference for the operation decision of regional multi-microgrids.

Key words

multi-microgrids / microgrid group / time-of-use electricity price / operation / profit comparison

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Wenqin NING , Shuxia YANG. Operation Comparison of Multi-Microgrid and Microgrid Group Under Time-of-Use Electricity Price[J]. Distributed Energy Resources. 2021, 6(5): 10-17 https://doi.org/10.16513/j.2096-2185.DE.2106540

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