摘要
储能是独立式光伏发电系统中的重要组成部分,可保证供电的稳定性和持续性,在提高电能质量方面起着重要作用。此处研究了一种混合储能系统(HESS)的新型拓扑结构和控制策略,该新型拓扑结构的优点在于对分布式系统中的双向直流-直流变换器额定功率要求低于传统系统。在运行模式切换时,控制系统可有效应对负载突变,确保蓄电池组和双向直流-直流变换器均工作于规定电压范围。此处建立了储能系统的数学模型和4种运行模式的控制模型,并对控制策略进行仿真和实验分析。仿真和实验结果表明新拓扑和控制策略可行,且HESS的性能不受双向直流-直流变换器的功率限制。
Energy storage is an important part of independent photovoltaic power generation system,ensuring the stability and continuity of power supply,and playing an important role in improving power quality.A new topology structure and control strategy of hybrid energy storage system(HESS)is studied.The advantage of the new topology is that the rated power requirement of the bidirectional DC/DC converter in the distributed system is lower than that of the traditional system.During operation mode switching,the control system can effectively cope with load changes to ensure that the battery pack and the bidirectional DC/DC converter are operating in the specified voltage range.The mathematical model of the energy storage system and the control model of four operation modes are established,and the control strategy is simulated and analyzed experimentally.Simulation and experimental results show that the new topology and control strategy are feasible,and the performance of the HESS is not limited by the power of the bidirectional DC/DC converter.
作者
曾梦迪
胡康涛
朱欣悦
张延旭
ZENG Meng-di;HU Kang-tao;ZHU Xin-yue;ZHANG Yan-xu(China Southern Power Grid Technology Co.,Ltd.,Guangzhou 510000,China)
出处
《电力电子技术》
2024年第2期79-83,共5页
Power Electronics
基金
国家重点研发计划(2018YFB0904102)
广东省智能电网新技术企业重点实验室基金(2020B1212070025)。
关键词
变换器
混合储能系统
协调控制
converter
hybrid energy storage system
coordinated control
