A Robust Virtual Inertia Control of Battery Storage System to Enhance Transient Stability of Grid System including Wind Farms

Abstract

With the rising penetration of modern
converter-based wind farm (WF) into the existing grid
system deteriorates system inertia due to reduction of the
capacity of conventional power stations which may lead to
the frequency instability as well as power system transient
instability. In order to solve this concern, this paper
presents a robust virtual inertia control approach for
battery storage system (BSS) to enhance the frequency
stability of the grid system after the generation failure
owing to severe grid disruption. The control approach
integrated inertial controller based on the rate of change
of frequency (ROCOF) and droop controller according to
frequency deviation. The impacts of the proposed virtual
inertia controller (VIC) is confirmed through simulation
analysis on a multi-machine power system with
conventional power stations, permanent magnet
synchronous generator (PMSG) with full converter based
WF and squirrel cage induction generator (SCIG) based
WF. Simulation study clearly demonstrates that by
adopting both strategies, the BSS can effectively minimize
the frequency nadir and steady-state error.