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Passing cloud results in rapid changes of irradiance. The intermittency of PV power output has drawn serious concern when the system is connected to electricity networks. The energy storage system (ESS) is considered as the most promising solution to balance and smooth the PV generation. Consequently, power ramp-rate control (PRRC) has been introduced to avoid significant PV power fluctuations. However,...
Due to the challenge of energy demand, renewable energy sources are introduced to our daily life in order to satisfy the energy demand and reduce the emission of greenhouse gas. But the increasing penetration of renewable energy sources causes obvious impact on the conventional power systems especially the control strategies. In order to solve the problem, microgrid is introduced, which usually consists...
The optimization strategy is proposed for the grid-connected PV-battery system in order to gain the maximum benefit. The proposed operation optimization is performed in two steps. In the first step, active power optimization is applied, which is aimed at the minimum operation cost (or the maximum system benefits). In the second step, reactive power optimization is applied based on the result of active...
In addition to battery life, power is limiting the performance, feature set, and form factor of most mobile communication devices. Many advanced low power techniques have been developed to deal with the problem, however, the cost of these techniques in terms of area, time to market, and quality has to be traded off against the power savings of each. Near threshold Computing (NTC) is a good example...
In this paper, a battery-integrated boost converter for module-based series connected photovoltaic (PV) system is analyzed. Each PV module has its own battery and DC/DC converter. The converter achieves maximum power point tracking (MPPT) and battery charging. Application of proposed converter to module-based series connected PV system can maintain string voltage and save an additional voltage amplification...
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