The miscoordination and malfunctioning of directional overcurrent relays (DOCR) may occur due to a significant change in the fault current level (FCL) network topology, from radial ring caused by renewable energy resource-based distributed generation (RES-DG). In this paper, hybrid time–current–voltage (TCV)-based protection scheme is proposed eliminate DOCR reduce overall operation time DOCRs....

A Neutral Point Clamped (NPC) type three-level inverter has the advantages of a low switch voltage and high-quality output waveform. However, there are inherent problems, such as neutral point potential asymmetry common mode interferences, which easily affect symmetry three-phase safe operation inverter. Firstly, according to different modulation degrees, fluctuation midpoint can be suppressed ...

To cope with the volatility and randomness of wind power, photovoltaic (PV) load demands in islanded microgrid, also to ensure safety economic operation microgrid system. A collaborative Distributed model predictive control (Di-MPC) based voltage optimization strategy is proposed, which considers strong coupling characteristic active reactive power due impedance ratio requirements real-time rob...

The integration of Renewable Energy Resources (RERs) into Power Distribution Networks (PDN) has great significance in addressing power deficiency, economics and environmental concerns. Photovoltaic (PV) technology is one the most popular RERs, because it simple to install a lot potential. Moreover, realization net metering concepts further attracted consumers benefit from PVs; however, due inef...

Electrical power system operators (SOs) are free to realize grid operations according their own strategies. However, because resulting flows also depend on the actions of neighboring SOs, appropriate coordination is needed improve states from an overall perspective and individual SO perspective. In this paper, a new method presented that preserves data integrity SOs independent operation grids....

This paper proposes a novel coordinated control strategy for voltage source converter (VSC) based high-voltage direct current (HVDC) grid integrated offshore wind farms (OWFs) to damp the power system oscillations. A feature of this is aiming use DC-link capacitor energy turbines (WTs) reduce interactions between oscillations and HVDC when onshore grid-side VSCs (GSVSCs) modulate active reactiv...

in this study, a novel variable impedance control for a lower-limb rehabilitation robotic system using voltage control strategy is presented. the majority of existing control approaches are based on control torque strategy, which require the knowledge of robot dynamics as well as dynamic of patients. this requires the controller to overcome complex problems such as uncertainties and nonlinearit...