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, selecti...

Concerning the distance protection steady-state over-reach or under-reach caused by transition resistance, a novel scheme based on transient information is proposed. First, multiple fault features are extracted using Generalized Stockwell Transform (GST), and criterion for identifying low-resistance high-resistance ground faults constructed. Then, GST coefficient matrix established single-ended...

The safe and reliable generation transmission of electricity is the desirable factor for utilities which arises need protection equipment such as relays in power systems. According to recent studies, conventional are not able provide required systems, resulting emergence various artificial intelligence (AI) techniques (i) neural network (ANN); (ii) adaptive neuro fuzzy interface system (ANFIS);...

Introduction: Ionizing radiation can cause damage to biologically important DNA molecules. Radiation in nuclear medicine radiation exposes people working in from two main positions; administer in gradiopharmaceuticals (the barn and squeezing a generator, procurement, distribution and drug infusion) and patients that receive radiation treatment (patients that are prescribed a ra...