发电技术2024，Vol.45Issue(3)：423-433,11.DOI:10.12096/j.2096-4528.pgt.23084
光储系统并网功率波动平抑及储能优化配置
Grid-Connected Power Fluctuation Suppression and Energy Storage Optimization Configuration of Photovoltaic-Energy Storage System
摘要
Abstract
[Objectives]Battery 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.[Methods]For 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.[Results]The 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.[Conclusions]The 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.关键词
光伏发电/光储系统/电池储能系统/波动平抑/优化配置Key words
photovoltaic power generation/photovoltaic-energy storage system/battery energy storage system/fluctuation suppression/optimization configuration分类
能源科技引用本文复制引用
赵斌,梁告,姜孟浩,邹港,王力..光储系统并网功率波动平抑及储能优化配置[J].发电技术,2024,45(3):423-433,11.基金项目
湖南省自然科学基金项目(2023JJ30048).Project Supported by National Natural Science Foundation of Hunan Province(2023JJ30048). （2023JJ30048）
