Quantum mechanics

Control (management)

Voltage

Engineering

Control system

Control engineering

Layer (electronics)

Telecommunications

Power (physics)

Computer science

Distributed generation

Distributed computing

Physics

Organic chemistry

Renewable energy

Distributed power

Power control

Automatic frequency control

Artificial intelligence

Microgrid

Chemistry

Decentralised system

Control theory (sociology)

Electrical engineering

IEEE Transactions on Smart Grid

This paper presents a two-layer distributed cooperative control method for networked microgrid (NMG) systems, taking into account the proprietary nature of microgrid (MG) owners. The proposed control architecture consists of an MG-control layer and an NMG-control layer. In the MG layer, the primary and distributed secondary controls realize accurate power sharing among distributed generators (DGs) and the frequency/voltage reference following within each MG. In the NMG layer, the tertiary control enables regulation of the power flowing through the point of common coupling (PCC) of each MG in a decentralized manner. Furthermore, distributed quaternary control restores the system frequency and critical bus voltage to their nominal values and ensures accurate power sharing among MGs. A small-signal dynamic model is developed to evaluate the dynamic performance of NMG systems with the proposed control method. Time-domain simulations and experiments on NMG test systems are performed to validate the effectiveness of the proposed method.

A Two-Layer Distributed Cooperative Control Method for Islanded Networked Microgrid Systems