In their assessment of solar-wind complementarity in continental China, and using the Pearson correlation coefficient, Ren et al. found similar results to ours regarding the spatial distribution of synergy between these two VRES on a daily scale.
A further problem reducing the spatial coverage of studies, is a lack of uniform method applied in available studies. Therefore, this work contributes to the existing body of knowledge by providing a first spatially comprehensive analysis of solar and wind energy complementarity on a global scale.
Besides using Kendall's tau correlation as the complementarity metric, this research is based on a pair of indicators (a: solar share, and b: sizing coefficient) derived from a concept of sizing of stand-alone solar-wind hybrid generation to minimize fluctuations of energy production, consequently reducing the required energy storage capacity.
Among the primary findings of this paper, we can mention that Kendall's Tau ranges between –0.75 and 0.75, are in line with previous research for specific regions, and might work for a theoretical limit in applied research benefiting from solar-wind complementarity.
Cyprus's electricity regulator has approved plans to install 400MWh of battery energy storage system (BESS) projects in the Mediterranean island country. Cyprus Energy Regulatory Authority (CERA) announced the approval earlier this week (18 June) of three projects which will be owned and operated by the Cyprus Transmission System Operator (TSOC).
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Image: Cyprus government / MECI. Cyprus's electricity regulator has approved plans to install 400MWh of battery energy storage system (BESS) projects in the Mediterranean island country.
D-curve breakers are suitable for circuits with high inrush currents, such as motors. They handle 10–20 times the nominal current. D-curve breakers are more sensitive to tripping than B- and C-curve breakers, making them unsuitable for circuits with low inrush currents.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit. D-trip circuit breakers prevent nuisance tripping, so they are best for equipment that has a high spike in current at startup, such as transformers, power supplies, and heaters.
C-curve breakers are commonly used to protect circuits with devices that have a relatively low inrush current, such as lighting, outlets, household appliances, and small machinery. These breakers handle 5–10 times the nominal current and react slower to overloads and short circuits compared to B-curve breakers, as their tripping current is higher.
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