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A flexible, automatic, reliable, and safe charging and discharging system for electric vehicles (EVs) and hybrid EVs is crucial in vehicle-to-grid (V2G) operation. The bidirectional inductive wireless power transfer system (BIWPTS) is an ideal solution in this situation. With authentic power-flow models for the BIWPTS in hand, designers and operators can predict, optimize, and analyze the interaction...
The power injected from large scale active distribution networks (ADN) with intermittent resources to the grid should be coordinated to support grid stability. The paper proposes power management strategies to counter-balance power fluctuations from ADN with high penetration level of photovoltaic (PV) and to supply ancillary services to the host medium voltage (MV) grid. This is achieved through two...
In grid-connected wind energy conversion systems (WECSs), phase locked loop (PLL) technique became widely used to enhance the stability and power quality. However, the accuracy of PLL is one of the major aspects that influence the system performance. Conventional synchronous-reference frame PLL (SRF-PLL) techniques have difficulty of low accuracy, frequency fluctuation, power oscillation and poor...
The idea of reshaping existing centralized electricity networks to decentralized small scale local power networks namely micro-grids, operating whether autonomous or interconnected to main distribution grid, became an important discussion. Islanding of a generator inside the micro-grid can cause problems in operation and management of the network; therefore proper islanding detection is crucial. This...
In this paper, some of the aspects related to the connectivity of DC microgrids to the main grid are investigated. The system under study is dependent mainly on sustainable energy sources. A fully controlled rectifier has been designed to tie the DC grid with the AC one. A vector decoupling controlled sinusoidal pulse width modulation (SPWM) technique has been used to allow the designed rectifier...
This paper presents a controlled reactive power compensator (RPC) for a stand-alone synchronous generator (SG)-based wind energy conversion system (WECS). The proposed controlled RPC consists of a synchronous condenser (SC), an AC/DC converter whose output supplies the excitation circuit of the SC, and a control scheme that adapts the converter output to supply the field voltage required to fit the...
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