Recently, the converters controlled by droop controller with phase-locked loop were
observed in islanded ac microgrids. However, only the state-space-based approach was …

The impedance model is widely used for analyzing power converters. However, the output
impedance is an external representation of a converter system, ie, it compresses the entire …

This article proposes a reduced-order small-signal closed-loop transfer function model
based on Jordan continued-fraction expansion to assess the dynamic characteristics of the …

The wide integration of voltage source converters (VSCs) in power grids as the interface of
renewables causes the converter-grid interaction stability challenge. The black-box …

Field experiences have shown that sub-synchronous oscillations (SSOs) can occur in direct-
drive wind farms with VSC-HVDC (DDWFV) systems. In light of this, a dynamic mathematical …

Direct Current (HVDC) transmission systems, which have become increasingly popular
worldwide in recent years, employ a variety of control methods for each frequency band, and …

The large integration of modular multilevel converters (MMC) has introduced stability issues.
The impedance-based stability analysis method is widely adopted, where the impedance …

The phase-locked loop (PLL)-based grid-following inverters have been widely used as the
interface between renewable energy resources (eg, wind and solar power) and the utility …

This paper proposes an impedance/admittance-based methodology for stability assessment
of converter-based device connections to power systems. The proposed methodology is …

Oscillation phenomena of offshore wind power plant (OWPP) in a wide frequency range can
be caused due to impedance interactions between grid-connected inverters (GCIs) and …