Distributed Consistent Coordinated Control of Modular Converters on AC Side of Electric Power Router

Abstract

Aiming at the cooperative control of the modular parallel connection of the AC interface converters of the power router, and the need to improve the frequency stability of the system in the island operation mode, this paper proposes a module control method of the AC interface converters of the power router based on the virtual synchronous machine algorithm. On this basis, a distributed secondary control strategy of the AC side modular converter of the power router based on consistency is further proposed, which realizes the secondary control of the system frequency and voltage and the proportional distribution control of active and reactive power. The distributed consensus cooperative control strategy proposed in this paper, combined with the multi-agent theory, only needs to establish a sparse communication network to complete the information exchange between adjacent distributed generation units. The system has high flexibility and good redundancy. Plug and play, not interfered by line impedance factors, improve the power distribution accuracy of the converter. Theoretical analysis and simulation results verify the effectiveness of the proposed control strategy.