Transient and stability analysis of heterogeneous micro-grid networks subject to uncertainties

Abstract

In this study, networks of interconnected heterogeneous micro-grids are studied. The transient dynamics is modelled as an averaging process whereby micro-grids are assimilated to dynamic agents in a network. An analysis of the convergence of the consensus dynamics is carried out under different assumptions on the damping and inertia parameters and the topology of the network. This study provides an insight into the relation between the network topology and the system's response. An analysis of the ways in which the heterogeneous inertial parameters affect the transient response of the network is also implemented. Additionally, the conditions that guarantee stability are identified when the system is under the influence of uncertain non-linear parameters. Finally, simulations are carried out based on a model calibrated on an existing network in the UK under parameter uncertainties.

Keywords

• transient response
• distributed power generation
• stability
• uncertain systems
• nonlinear control systems
• control system synthesis
• microgrid networks
• interconnected heterogeneous microgrids
• transient dynamics
• averaging process
• dynamic agents
• consensus dynamics
• damping
• inertia parameters
• network topology
• system
• heterogeneous inertial parameters
• transient response
• nonlinear parameters
• parameter uncertainties