Fast and accurate fault detection localization are important topics in voltage source converter-based high-voltage direct current transmission (VSC-HVDC) grids order to isolate the after first milliseconds of occurrence. Common signal processing methods used for detecting traveling wave (TW) peaks like Fourier transform, S-transform wavelet-based techniques transform into frequency domain, requ...

The Alternate Arm Converter (AAC) is a voltage source converter being developed as an alternative to the Modular Multilevel Converter (MMC) for HVDC power transmission and reactive power compensation. Each Arm of the converter contains high voltage series IGBT Director Switches and full-bridge cells, which enables the VSC to ride through AC and DC network faults. This paper describes how the AA...

This paper investigates different network topologies of potential future DC offshore grids with respect to their impact on transient fault currents for permanent single pole-toground faults. Investigations are carried out on a twelve-terminal ±320kV VSC-HVDC network modeled around the physical topology of the North Sea. Results are obtained through EMTP simulations in PSCAD using a detailed, fr...

Considering the advantage of ability data-mining techniques (DMTs) to detect and classify patterns, this paper explores their applicability for protection voltage source converter-based high direct current (VSC-HVDC) transmission systems. In spite location fault occurring points such as external/internal, rectifier-substation/inverter-substation, positive/negative pole DC line, stated approach ...

At present, power electronics-based technologies are widely penetrating the power systems in an effort towards “smart-oriented” operational systems. Voltage-sourced converters (VSCs) are such power electronics-based technologies that currently seem rather to preponderate in many promising applications including FACTs, HVDC grids, DGs and VSDs. VSCs are found in a plethora of structures ranging ...

Modular multilevel converter (MMC) has been widely used in VSC-HVDC system for its smooth output waveform, low harmonic content and switching loss. But compared with the conventional LCC-HVDC system, modular a short development history, few engineering applications, high failure rate lacks of very effective protection strategies, which limits further development. Therefore, this paper firstly i...