The interaction between an HVDC converter and the saturation characteristic of a converter
transformer can lead to a type of harmonic instability widely known as converter transformer …

Core saturation instability has occurred on several HVDC schemes resulting from
interactions between second harmonic and DC quantities (voltages and currents) on the AC …

This thesis describes a linear and direct method of analysing the interaction of waveform
distortion around an HVdc convertor. Existing analysis techniques are reviewed, and their …

Core saturation instability is a condition resulting from excess low-order harmonic AC/DC
system interactions, amplified by increasing transformer flux offset which, in turn, is driven by …

An incremental transformer model suitable for slow transient studies was developed. A
typical application is the study of temporary harmonic overvoltages in AC/DC systems …

The current control system of an HVDC converter has rather complicated dynamic
properties, and it is not possible to determine these by simple manual calculations. Instead …

With increasing activities in development of Voltage Source Converter (VSC) based High
Voltage dc (HVDC) transmission system, it is necessary to pre-asses their impact on system …

A method of analysis is presented and applied to a model system which is well established
and extensively used in studies of HVDC converters connected to weak AC systems. The …

The influence of HVDC control loops on the dynamic stability of an overall HVDC–HVAC
system is discussed. The eigenvalue decomposition is used for the analysis of system …

There have been reports of difficulties encountered in the operation of high-voltage ac-dc
conversion control schemes, particularly with reference to the so-called harmonic-instability …