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"An Advanced Modulation Technique for Transformer-less Grid-Connected I" by A. M. Mahfuz-Ur-Rahman, Md Rabiul Islam et al.

This paper presents a new current peak point tracking third harmonic injected bus clamping pulse width modulation (CPPTTHBCPWM) technique for effective active and reactive power control in a transformer-less H5 solar photovoltaic (PV) inverter. The proposed technique reduces the switching loss compared to that of the traditional switching technique by using a new reference signal and eliminating unwanted gate pulses. The proposed CPPTTHBCPWM technique ensures better utilization of the dc bus voltage, lowers the total harmonic distortion (THD), and lowers the converter loss compared to the conventional modulation techniques. The proposed modulation technique also reduces the thermal stress in the switching devices and increases the power converter lifetime. The proposed modulation technique is simulated in MATLAB/Simulink environment and validated in the laboratory using a reduced-scale prototype test platform. ....

Converter Loss , Inverter Circuits , Roportional Resonant Controller , Pulse Width Modulation , Wm Technique , Reactive Power , Solar Photovoltaic Systems , Witching Technique , Thermal Stress , Total Harmonic Distortion ,

"A Cooperative Planning Framework for Enhancing Resilience of Active Di" by Ghulam Mohy-ud-din, Kashem M. Muttaqi et al.

Extreme incidents can cause diverse and dynamic disruptions to active distribution networks (ADNs). Thus, ADN operators (DNOs) must plan to prepare for and adapt to changes in conditions to withstand and quickly recover from such disruptions. This paper proposes a cooperative planning framework to design optimal microgrids (MGs) in smart ADNs integrated with virtual power plants (VPPs) to quickly reconfigure and recover during such events. The proposed framework has two parts: 1) optimal partitioning of ADNs with integrated VPPs into supply-sufficient MGs; and 2) the scheduling of the partitioned MGs. Since the VPPs are autonomous, a smart DNO and VPP interface and operating model for dynamic operating envelopes (DOEs) is proposed to quantify and integrate the supply capacity of VPPs in the operation of MGs. As part of this framework, three optimization models are formulated including VPP optimization, ADN partitioning, and a partitioned ADN scheduling model, where the uncertainty of r ....

Active Distribution Network Adn , Computational Modeling , Distribution Networks , Oad Modeling , Icrogrid Mg , Reactive Power , Virtual Power Plant Vpp ,