A Fully Decentralized Control of Grid-Connected Cascaded Inverters

TL;DR

This paper introduces a decentralized control approach for grid-connected cascaded inverters that eliminates the need for communication, enhancing reliability and reducing costs, with stability analysis and simulation validation.

Contribution

It presents a novel decentralized control scheme for cascaded inverters that operates without communication, differing from traditional centralized methods.

Findings

System stability is analytically derived.

Simulation confirms the effectiveness of the control scheme.

Decentralized control improves reliability and reduces costs.

Abstract

This letter proposes a decentralized control scheme for grid-connected cascaded modular inverters without any communication, and each module makes decisions based on its own local information. In contrast, the conventional methods are usually centralized control and depend on a real-time communication. Thus, the proposed scheme has advantages of improved reliability and decreased costs. The overall system stability is analyzed, and the stability condition is derived as well. The feasibility of the proposed method is verified by simulation.