| Autor: |
ZHAO Bin, LIANG Gao, JIANG Menghao, ZOU Gang, WANG Li |
| Jazyk: |
English<br />Chinese |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
发电技术, Vol 45, Iss 3, Pp 423-433 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2096-4528 |
| DOI: |
10.12096/j.2096-4528.pgt.23084 |
| Popis: |
ObjectivesBattery energy storage system is one of the effective means to ensure the reliability of photovoltaic (PV) power generation system and improve the utilization rate of PV power generation. However, there are some problems in the PV-energy storage power station, such as the difficulty of power fluctuation suppression and the unreasonable configuration of energy storage capacity. In order to solve these problems, relevant research was carried out.MethodsFor energy-based battery energy storage, the characteristics of scheduling mode and autonomous mode were analyzed, and a power-limited suppression strategy of PV-energy storage system based on energy storage operation in scheduling mode was proposed to realize power suppression and reduce the frequency of energy storage charge/discharge switching. The optimization objective of minimizing abandoned power losses in the PV-energy storage system was established, with constraints such as the probability of power fluctuation exceeding the limit. An algorithm was used to solve and optimize the energy storage configuration. Taking the 50 MW Sangzhuzi PV-energy storage power station in Langming, Tibet as an example, the effectiveness of the proposed grid-connected power suppression strategy was validated.ResultsThe proposed grid-connected power suppression strategy can reduce the probability of power fluctuation exceeding the limit from 25.64% to 6.41% without increasing the frequency of energy storage charge/discharge switching. When the probability of grid-connected power fluctuation exceeding the limit is 5%, the optimal configuration for the energy storage system of the power station is determined to be 14.5 MW/94 MW⋅h.ConclusionsThe proposed power fluctuation suppression strategy and energy storage optimization configuration method can provide technical reference for the optimal design and operation of grid-connected PV-energy storage system. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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