Abstract
To achieve the goal of carbon peak and carbon neutrality, the integration of diversified renewable energy will be the principal feature of the planning framework of the smart grid, and the planning direction and focus of power systems would shift to the network transmittability and flexibility enhancement. This paper presents an infrastructure investment demand assessment model based on multi-level analysis method for the renewable-dominated power system planning. First, for the load side, the composite capacity ratio is used to assess the capacity demand of power transformation infrastructure for satisfying the load growth. Then, the renewable energy permeability is adopted as the basis to assess the extensional transmittability capacity for the integration of high renewables. Furthermore, the capacity demand of flexible transmission lines for power grid flexibility enhancement is also estimated. Finally, the amount of unit investment for source-network-load infrastructure capacities can be predicted based on the least square generation adjunctive network and support vector machine (LSGAN-SVM) algorithm. The performance of the proposed model has been tested and benchmarked on a practical-sized power system to verify its effectiveness and feasibility.
Highlights
Promoting a high proportion of renewable energy into the power system will become an important technical prerequisite for low-carbon development and energy transition (Tor et al, 2010; Xu et al, 2020)
In order to reflect the higher accuracy of the multi-level investment demand assessment model proposed in this paper, it is compared with the existing power system investment demand assessment model
The existing model of the first type adopts the time series prediction method, which does not need to establish a causal relationship in modeling and can be modeled only with historical data
Summary
Promoting a high proportion of renewable energy into the power system will become an important technical prerequisite for low-carbon development and energy transition (Tor et al, 2010; Xu et al, 2020). A multi-level investment demand assessment model is designed for renewable-dominated power system planning which satisfies the growth of load and enhances network transmittability and flexibility. The key contributions of this study are twofold: 1) A multi-level investment demand assessment model for renewable-dominated power system planning is presented.
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