Protection Scheme for Transient Impedance Dynamic-Time-Warping Distance of a Flexible DC Distribution System

Flexible DC power distribution systems have characteristics such as rapid fault occurrence and fragile electronics. faults usually result in converter blocking (2–5 ms). However, existing protection schemes are susceptible to distributed capacitance, cannot tolerate long communication delays, require artificial boundaries, among other features that make it impossible combine speediness, selectivity, reliability. A technique based on normalized transient impedance dynamic-time-warping (DTW) distance is proposed improve the performance of scheme. First, equivalent circuit flexible system (±10 kV) established, its expression derived accordingly. Subsequently, components split their resolved separately. Finally, scheme for DTW characteristics. established verify