Hybrid energy storage configuration method for distribution network in high-proportion uncertain power supply scene

Abstract

The invention discloses a hybrid energy storage configuration method for a distribution network in a high-proportion uncertain power supply scene, which comprises the following steps: establishing a typical power generation model for distributed renewable energy; establishing an energy storage upper-layer optimization model and an energy storage underlayer optimization model; jointing the energy storage upper-layer optimization model and the energy storage underlayer optimization model and solving to obtain a final distribution network hybrid energy storage configuration result. The hybrid energy storage configuration method for the distribution network in the high-proportion uncertain power supply scene in the invention not only establishes an economic evaluation model from the perspectives of social benefits, investor benefits, and network loss reduction in detail, but also studies locating and sizing, and economic operation of hybrid energy storage to apex cutting and vale filling of the medium-voltage and high-voltage distribution network system, and proposes a power-type energy storage and energy-type energy storage coordinated control method, so as to better achieve apex cutting and vale filling of the system and enhance the uncertain power absorptive ability of the system.

Description

technical field [0001] The invention specifically relates to a hybrid energy storage configuration method for a distribution network under a high-proportion uncertain power source scenario. Background technique [0002] With the rapid growth of current energy demand and the increasing pressure of environmental protection, a large number of grid-connected distributed power sources have brought a non-negligible impact on the power grid. The distribution network has changed from "passive" to "active". From "one-way" to "two-way", it presents an increasingly complex "multi-source" feature, which will have a profound impact on distribution network load characteristics, power supply security, reliability, and asset utilization. On the one hand, when distributed energy is connected to the grid, the increase in the peak-to-valley load difference of the grid seriously affects the security and economy of the grid; on the other hand, the large-scale access of distributed energy has bro...

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Problems solved by technology

"Energy Storage System Capacity Configuration and Economic Evaluation for Power Grid Peak Loading and Valley Filling" established an economic evaluation model for energy storage system investment, but the economic benefit model and investment model in this model are relatively simple, and do not consider the impact of different energy storage configurations on the system. The influence of peak shaving and valley filling performance; "Optimized configuration scheme of supercapacitor and battery hybrid energy storage based on cost analysis" proposes an optimal configuration scheme of hybrid energy storage based on cost analysis, but it is limited to single-objective optimization; the existing hybrid energy storage is multi-centralized In the energy storage control method or capacity optimization for a single objective, the multi-objective control and solution algorithm of hybrid energy storage is less considered

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