access icon free Research on cloud energy storage service in residential microgrids

© The Institution of Engineering and Technology
Received 30/04/2019, Accepted 14/10/2019, Revised 06/09/2019, Published 15/10/2019

In residential microgrids, an energy storage system (ESS) can mitigate the intermittence and uncertainty of renewable energy generation, which plays an important role in balancing power generation and load consumption. Distributed energy storage (DES) is a common form of ESS. However, the high investment cost and fixed energy storage capacity limit their application in residential areas. This study proposes an improved service mechanism based on an alternative form of DES, cloud energy storage (CES). The energy transaction service is added in traditional CES service mechanism to enhance the power interaction between users. In addition, the pricing scheme of CES service fee is formulated, which is calculated based on the battery life loss caused by charging/discharging behaviour during the service period. This study considers that CES can improve energy storage utilisation and meet the energy storage requirements of users at a lower cost than DES. Finally, the CES service decisions are solved by the solver LINGO, including charging/discharging power decisions and energy trading decisions of users. Simulation results show that users' electricity costs are further reduced under the improved CES model. The rationality and economic feasibility of the improved CES model are demonstrated.

Inspec keywords: distributed power generation; power markets; renewable energy sources; energy management systems; power grids; demand side management; energy storage; pricing; electric power generation; secondary cells

Other keywords: CES service decisions; energy storage requirements; high investment cost; energy trading decisions; intermittence; improved CES model; cloud energy storage service; energy storage utilisation; ESS; energy storage capacity; power interaction; uncertainty; energy storage system; service period; traditional CES service mechanism; users; improved service mechanism; CES service fee; power generation; residential microgrids; DES; distributed energy storage; renewable energy generation; residential areas; energy transaction service; alternative form

Subjects: Power system management, operation and economics; Distributed power generation; Secondary cells; Optimisation techniques; Secondary cells

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