An adaptive droop-based hierarchical optimal voltage control (DHOVC) scheme is proposed for voltage-source converter high-voltage-direct-current (VSC-HVdc) connected offshore wind farms (WFs). The turbines (WTs) and WF side VSC (WFVSC) are coordinated to minimize the deviations of buses inside from nominal mitigate reactive power (Var) fluctuations WTs. model predictive used improve performance...

In this paper an approach to designing low order controllers for a VSC HVDC terminal which are robust over a range of operating points is presented. An uncertainty region is used to characterise the operating range as described by a non-linear model of the terminal. An LMI based formulation is then used to synthesize low order controllers which maximize the size of the structured uncertainty re...

In this paper, a reliable methodology is proposed in order to implement and validate Model Predictive Control (MPC) scheme on an actual Voltage Source Converter (VSC) integrated scale-down multi-terminal DC grid. The objective of the investigated MPC controller enable AC frequency support among two asynchronous areas through High Direct Current (HVDC) grid, while considering physical constraint...

A conventional steady-state power flow security check only implements point-by-point assessment, which cannot provide a security margin for system operation. The concept of a steady-state security region is proposed to effectively tackle this problem. Considering that the commissioning of the increasing number of HVDC (High Voltage Direct Current) and the fluctuation of renewable energy have si...