To overcome the mechanical stress and damage caused by high wind speed grid transient on turbine (WT) to ensure smooth operation of WT, a sensorless maximum power tracking (MPT) pitch controller for integrated WT is proposed in this paper. The advantages are: a) reduced rotor oscillations, b) transients Point Common Coupling (PCC) voltage, c) controlled output without exceeding its thermal limi...

With the enlarging scale of doubly-fed induction generators (DFIGs) connected to power systems, it is important analyze influence a short-circuit current system relay protection. Due correct evaluation protection operation characteristics, DFIG needs be calculated accurately. But research on based following assumption: rotor excitation zero after crowbar put, and its dynamic process ignored. Th...

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In the increasingly competitive public-cloud marketplace, improving the efficiency of data centers is a major concern. One way to improve efficiency is to consolidate as many VMs onto as few physical cores as possible, provided that performance expectations are not violated. However, as a prerequisite for increased VM densities, the hypervisor’s VM scheduler must allocate processor time efficie...

Integrated circuits which using complex nanoscale electron devices hold promise as a technology for ultra dense high speed integrated digital logic circuits. Especially the negative differential resistance of the current-voltage characteristic in resonant tunneling diodes (RTDs) can be used to reduce device counts per circuit functions, thus increasing circuit integration density. In particular...

The demand for increased miniaturization of integrated circuits has opened the way to the emerging field of molecular electronics. Recent experimental studies have established that single molecules or a finite ensemble of self-assembled molecules can perform the basic functions of conventional electronic components (i.e., transistors, wires and diodes). In particular, it has been demonstrated t...

Speed and selectivity of DC fault protection are critical for High-Voltage (HVDC) grids present significant technical economic challenges. Therefore, this paper proposes a non-unit solution that detects discriminates faults based on frequency domain analysis the transient period faults. The representation generic HVDC grid section corresponding DC-side signatures in form basis generalized appro...

Abstract With the high penetration of distributed generation and gradual increase in loop network structures, existing over‐current protection distribution networks is difficult to apply. The use current differential has become an ideal solution, performance commercialization 5G communication provides effective way solve problem channel transmission. Aiming at based on 5G, this paper adopted ad...

Groundwater artificial recharge and medium characteristics represent the major factors in controlling groundwater flow processes managed aquifer areas. According to depositional features of alluvial fans, an analogous homogeneous phreatic sand tank corresponding inhomogeneous scale numerical models were established investigate under combined influence (human activities) decaying hydraulic condu...

Modular multilevel converters (MMC) play a dominant role in integrating remotely located renewable energy resources (RER) over the high-voltage direct current (HVDC) transmission network. The fault ride-through capabilities of MMC-HVDC network during low-voltage faults and power fluctuation due to RER intermittency are major obstacles effective integration energy. In response, this article prop...