Abstract
Photovoltaic (PV) and wind power (WT) resources can influence each other in some scenarios, and this influence tends to show that the rise of PV resources may indicate the drop of WT resources, and vice versa. This pattern of PV and WT resources influencing each other is called the complementary characteristics of PV and WT power. The complementary characteristics of the power outputs of different kinds of distributed renewable energy resources (DRERs) and the correlation between DRERs outputs and loads can impact the consumption of DRERs by the loads within the grid, which represents the rate of DRER outputs consumed by loads instead of being reduced. In this regard, this paper investigates a planning strategy for DRERs considering these two factors. An improved co-variance matrix method is applied to generate complementary samples of DRERs and correlated samples of DRERs and loads. The samples generated are used to study the impacts of the degree of correlation between DRERs and loads on the consumption ability of DRERs. The concept of the cluster is introduced as a region including DRERs with complementary characteristics. Based on the cluster partition method and the samples generated, the DRERs planning model is proposed to maximize the profits of different DRER stakeholders. The planning model is transformed into a single objective model through the ideal point method. A Benders decomposition-based method is developed to efficiently solve the proposed model, and an actual network in China is used to illustrate its performance. The results show DRER consumption can be significantly improved by the proposed planning model.
Highlights
With the promotion of renewable energy policies in China, more and more distributed renewable energy resources (DRERs) are being connected to power systems
In order to study the effects of complementary relationship between wind turbine (WT) and PVs and the matching characteristics between the power generation and loads on the planning and consumption of
DRERs, a method is proposed in this paper to generate correlation scenarios of WTs, PVs, and loads based on an improved correlation matrix method, orthogonal transformation and the kernel density estimation method
Summary
With the promotion of renewable energy policies in China, more and more distributed renewable energy resources (DRERs) are being connected to power systems. This has led to occurrences of reverse power flows in distribution networks, where energy flows between substations with the same voltage level or from low-voltage substations to an upstream substation. Excessive reverse power flows are usually not allowed in traditional planning strategies of DRERs because they can deteriorate the power quality and result in increased power losses, even breakdown of conventional transformers. It is possible to limit reverse power flows within a specific region, which includes several substations to increase the overall outputs of DRERs
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