The DC-side line faults in high-voltage direct-current (HVDC) systems utilising voltage-source converters (VSCs) are a major concern for multi-terminal HVDC systems in which complete isolation of the faulted system is not a viable option. A number of challenges are posed by both pole-to-pole and pole-to-ground faults including the presence of very fast and high amplitude discharge current from ...

Voltage source converter based high-voltage direct current (VSC-HVDC) transmission technology has been extensively employed in power systems with a high penetration of renewable energy resources. However, connecting voltage (VSC) to an AC weak grid may cause the system become unstable. In this paper, phase-shift phase-locked loop (PS-PLL) is proposed wherein back electromotive force (BEMF) obse...

Abstract Aiming at the problems that most fault location methods are applied to high voltage direct current (HVDC) transmission system, such as low accuracy and vulnerability noise, a source converter (VSC)-HVDC method based on effective feature deep belief network is proposed. Firstly, Karenbauer phase mode transform used decouple original data eliminate coupling effect between positive negati...

The VSC based HVDC link between France and Spain (INELFE project: France-Spain ELectrical INterconnection) will be the most powerful VSC link by 2014. Commissioning of the link is planned in the late 2014. The French TSO RTE is currently conducting studies on this future installation. The large number of switching elements in Modular Multilevel Converters (MMC) introduces several complexities f...

In recent years, distributed generation and a large number of sensitive AC and DC loads have been connected to distribution networks, which introduce a series of challenges to distribution network operators (DNOs). In addition, the advantages of DC distribution networks, such as the energy conservation and emission reduction, mean that the voltage source converter based multi-terminal direct cu...

An integral plus resonant sliding mode direct power control (IRSMC DPC) strategy for voltage source converter high voltage direct current (VSC-HVDC) systems under unbalanced grid voltage conditions is proposed in this paper. Through detailed instantaneous power flow analysis, a generalized power compensation method, by which the ratio between the amplitude of active and reactive power ripples c...

With the increased levels of offshore wind power penetration into power systems, the impact of offshore wind power on stability of power systems require more investigation. In this paper, the effects of a large scale doubly fed induction generator (DFIG) based offshore wind farm (OWF) on power system stability are examined. The OWF is connected to the main onshore grid through a voltage source ...

and Applied Analysis 3 3. Voltage Stability Model for AC/DC Systems with VSC-HVDC 3.1. The Modified Power Flow Algorithm Based on Sequential Iteration Method. For the previous model of AC/DC system with VSC-HVDC, the simplified power flow equations are given by fac = 0, fac-dc = 0, fdc = 0, (7) where fac = [ΔPa1, ΔQa1, . . . , anAC , anAC T, fac-dc = [ΔPt1, ΔQt1, . . . , tnVSC , tnVSC ] T, fdc ...

This paper proposes the development of an appropriate control system for the real-time management of large offshore Doubly-Fed Induction Generator (DFIG) based wind farms, connected to the transmission network by Voltage Source Converter High Voltage Direct Current (VSC-HVDC) link. In this plant layout, variable frequency operation lets wind turbines to work on a wider range of wind speed value...