Abstract
Increased utilization of renewable energy (RE) resources is critical in achieving key climate goals by 2050. The intermittent nature of RE, especially solar and wind, however, poses reliability concerns to the utility grid. One way to address this problem is to harmonize the RE resources using spatio-temporal complementarity analysis. Two RE resources are said to be complementary if the lack of one is balanced by the abundance of the other, and vice versa. In this work, solar–wind complementarity was analyzed across the provinces of Kalinga and Apayao, Philippines, which are potential locations for harvesting RE as suggested by the Philippine Department of Energy. Global horizontal irradiance (GHI) and wind speed data sets were obtained from the NASA POWER database and then studied using canonical correlation analysis (CCA), a multivariate statistical technique that finds maximum correlations between time series data. We modified the standard CCA to identify pairs of locations within the region of study with the highest solar–wind complementarity. Results show that the two RE resources exhibit balancing in the resulting locations. By identifying these locations, solar and wind resources in the Philippine islands can be integrated optimally and sustainably, leading to a more stable power and increased utility grid reliability.
Highlights
Introduction iationsInternational efforts to decarbonize using renewable energy (RE) resources are currently underway [1], leading to expanding electricity generation [2,3]
Our work demonstrates that the proposed canonical correlation analysis (CCA) provides better interpretability and and Apayao where solar–wind spatio-temporal complementarity is optimal using adcomputational efficiency, still giving consistent results witha other such as vanced multivariate statisticalwhile techniques
Global horizontal irradiance (GHI) and wind speed time series were removed from each signal, and the resulting time series were divided by their respective variances
Summary
International efforts to decarbonize using renewable energy (RE) resources are currently underway [1], leading to expanding electricity generation [2,3]. The costs of RE have been declining, and their global investments have continued to rise [4]. A recent review indicated that solar photovoltaics (PV) and wind turbines contribute two-thirds to the growth of RE [2]. This trend has inspired nations to increase their renewable energy targets as part of their low-emission development strategy. In the case of island countries, renewable energy projects primarily focus on standalone systems in off-grid areas.
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