Non-communication based protection scheme using transient harmonics for multi-terminal HVDC networks

A Symmetrical-Asymmetrical Fault Characteristics Analysis within Cogeneration Power Plant in Izmir, Turkey: An Experimental Assessment

“…In other study on short circuit analysis, [29] showed the changes in current and voltage during short circuit issue for protection scheme in micro grid by using PSCAD. [30] proposed fault detection scheme used transient current by using Discrete Fourier transform. [31] demonstrated contribution of short circuit current scenarios inverter-based voltage source DG for on-grid system.…”

A novel acceleration criterion for remote-end grounding-fault in MMC-MTDC under communication anomalies

“…In comparison with the conventional stationary wavelet transform, the border effects on the wavelet coefficient energy are introduced to solve the problem of time delays associated with long mother wavelets. In [11], a fault detection scheme for MMC-MTDC is proposed to draw transient current harmonics from the initial fault current by using discrete Fourier transform, which overcame the high-resistance fault and faulty pole identification problems. However, the influence of the DC CB operation process is ignored in engineering applications.…”

“…After each circle of decomposition, the sampling frequency is reduced by half. In this process, Dh(t) represents the component of the transient signal x(t) at each scale (frequency band) [21], which is given by: (11) For illustrative purposes, the process of detail coefficient construction is illustrated in Fig. 3.…”