Multiagent based distributed control for state-of-charge balance of distributed energy storage in DC microgrids

Abstract

Abstract-In this paper, a distributed multiagent based algorithm is proposed to achieve SoC balance for DES in the DC microgrid by means of voltage scheduling. Reference voltage given is adjusted instead of droop gain. Dynamic average consensus algorithm is explored in each agent to get the required information for scheduling voltage autonomously. State-space analysis on a single energy storage unit and simulation verification shows that the proposed method has two advantages. Firstly, modifying the reference voltage given has less impact on system stability compared to gain scheduling. Secondly, by adopting multiagent methodology, the proposed distributed control has less communication dependence and more reliable during communication topology changes.

Coordinated Secondary Control for Balanced Discharge Rate of Energy Storage System in Islanded AC Microgrids

“…Fourth, it presents a lower sensitivity respect to secondary control level parameters over the system dynamics due to the larger stability margin of the primary controller. The advantages and disadvantages of the proposed strategy compared with the conventional power-sharing control [8]- [13] and the previous droop-based coordinated SoC control [30]- [36] are summarized in Table III.…”

“…The primary control can regulate the output voltage of each DG unit based on the commands sent from a high-level controller. Several coordinated control strategies for SoC balancing in an MG have been established by combining communication technology and hierarchical control [30]- [36]. A coordinated SoC control for distributed ESSs by using adaptive droop control in DC MGs has been proposed in [30].…”

“…Another research direction was taken by using fuzzy logic-based control strategy as presented in [33]- [35] for a DC MG by modifying the droop gains. Alternatively, a distributed multi-agentbased algorithm was proposed in [36] to achieve SoC balancing by using voltage scheduling.…”

Hierarchical distributed control for decentralized battery energy storage system based on consensus algorithm with pinning node

“…In [13], a distributed multi-agent based algorithm is proposed to realize SoC balancing by means of voltage scheduling. Reference [14] proposes a sliding mode control strategy based on multi-agent system to improve the converge speed of the existing SoC balancing strategies.…”

Modeling and simulation of an autonomous hybrid power system

“…Multi -agent systems is only one method among a lot that are being studied. In [27] the multi-agent approach is implemented and its design is described to simulate in Simulink the operation of a distributed smart grid under transient conditions, while in [28] the same method has been used to control the distributed energy storage in DC microgrids. It is quite interesting, that while multi agent control has been applied a lot in microgrid simulations regarding the voltage and frequency dynamic responses, it has not been applied in power management level.…”