Abstract

Conventional microgrids have a specific system configuration and a complex hierarchical control structure, which has resulted in difficulties in their economic development. A modular microgrid based on distributed battery storage has been proposed to realize the rapid economic development of small-to-medium microgrids. Control of modular microgrids is simplified to voltage control within modules and exchange power control among modules. Battery power has great influence on battery performance. Space-time complementary power characteristics among modules help to alleviate power fluctuations, prolong the service life and realize the unified maintenance of distributed batteries. Leader-following consensus theory of multi-agent systems is adopted to realize the power and capacity consensus tracking of distributed battery storage in a modular microgrid. Sufficient and necessary conditions for continuous-time and sampled-data bounded power and capacity consensus tracking of distributed battery storages are deduced by a matrix analytical method. Steady regions of sampling period and sampling delay for sampled-data bounded power and capacity consensus tracking are determined by analytical or numerical solutions. Simulations and experiments on a modular microgrid demonstration project located on DongAo Island (China) show the effectiveness and robustness of the proposed power and capacity consensus tracking strategy for distributed storage systems. The power and capacity consensus tracking strategy determines the exchange power among modules and improves the control technology of modular microgrids.

Highlights

  • Microgrids are an effective way to realize the large-scale integrated utilization of renewable energy sources, such as wind and solar power

  • We have carried out a series of theoretical researches on bounded consensus tracking of multi-agent systems with sampled-data [37,38], which lays a good foundation to design a power and capacity consensus tracking strategy for distributed battery storage in a modular microgrid

  • The The power andand capacity consensus tracking batterystorage storage systems power capacity consensus trackingprotocol protocol of of distributed distributed battery systems in in a modular microgrid is designed in this paper

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Summary

Introduction

Microgrids are an effective way to realize the large-scale integrated utilization of renewable energy sources, such as wind and solar power. We have carried out a series of theoretical researches on bounded consensus tracking of multi-agent systems with sampled-data [37,38], which lays a good foundation to design a power and capacity consensus tracking strategy for distributed battery storage in a modular microgrid. Leader-following consensus tracking theory of multi-agent systems is adopted to study the continuous-time and sampled-data control protocols and stabilization ranges of parameters. The power and capacity consensus tracking strategy of distributed battery storage determines the exchange power among modules and the control problem of the modular microgrid is solved completely.

Modular Microgrid
System
Modular
Structure
Leader-Following Consensus Tracking Theory of Multi-Agent Systems
Simulations of Continuous-Time
Simulations of Sampled-DataPower
12. Battery
Theand stabilization range of when sampling
Simulations of Topology Reconfiguration
19. Operation
Experiments of Power
Conclusions
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