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蓄电池超级电容混合储能双重解耦控制策略
贾春燕1, 康朋1, 彭光金2, 余海威3, 陈永刚1, 刘瑜1, 朱熠2
1.重庆市电力公司 经济技术研究院, 重庆 401120;2.重庆大学 输配电装备及系统安全与新技术国家重点实验室, 重庆 400044;3.中国建筑西南设计研究院有限公司, 成都 610041
摘要:
蓄电池超级电容器混合储能系统既可充分应用功率型储能器件的物理特性,又可优化蓄电池的充放电过程,是储能技术未来发展方向之一。本研究中提出了一种主从结构双重解耦控制策略,利用功率前馈解除了母线电压与扰动输入间的耦合关系,也抑制了耦合扰动输入对超级电容端电压的影响,将端电压有效维持在一定范围,解决了传统控制策略下超级电容的过充过放问题,简化了控制过程;而且在保证微电网稳定运行的同时,使得蓄电池的充放电电流变化平滑,降低其变化率,延长其使用寿命,并提高了微电网孤岛运行储能系统运行的可靠性。最后通过仿真分析,验证了所提控制策略的正确性。
关键词:  微电网  孤岛运行  混合储能  解耦控制
DOI:10.11835/j.issn.1000-582X.2020.02.005
分类号:TM912.9
基金项目:
Dual decoupling control strategy of battery-supercapacitor hybrid energy storage
JIA Chunyan1, KANG Peng1, PENG Guangjin2, YU Haiwei3, CHENG Yonggang1, LIU Yu1, ZHU Yi2
1.Economic and Technological Research Institute of Chongqing Electric Power Company, Chongqing 40120, P. R. China;2.State Key Laboratory of Power Transmission Equipment&System Security and New Technology, Chongqing University, Chongqing 400044, P. R. China;3.China Southwest Architectual Design and Resarch Instiute Co. Ltd., Chengdu 640041, P. R. China
Abstract:
The battery and supercapacitor hybrid energy storage system can not only fully utilize the physical characteristics of power-type energy storage devices, but also optimize the charging and discharging process of batteries, and it is one of the development trends of energy storage technology in the future. A dual decoupling control strategy with master-slave structure is proposed to meet the requirements in isolated operation of microgrid. The coupling relationship between bus voltage and disturbance input is eliminated by power feedforward, and the influence of coupling disturbance input on the terminal voltage of supercapacitor is restrained, thus allowing the terminal voltage to be effectively maintained in a norm. The problem of supercapacitor overcharge and overdischarge under the traditional control strategy is solved, and the control process is simplified. The stable operation of the microgrid is ensured, the charging and discharging current of the batteries changes smoothly, the change rate of the output current of the batteries decreases, and the service life of the batteries is prolonged. The reliability of the micro-grid island operation energy storage system is improved. Finally, simulation analysis is carried out and the correctness of the proposed control strategy is verified.
Key words:  microgrid  isolated island operation  hybrid energy storage  decoupling control
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