电力弹簧研究进展:原理、拓扑结构、控制和应用

Review of Electric Spring: Principle, Topologies, Control and Applications

可再生能源发电高比例渗透的电力系统容易因电力供需不平衡产生各种问题,影响电力系统的安全运行。电力弹簧(electricspring,ES)作为一种新技术能够克服需求侧管理模式已有方法的不足,通过将波动的能量转移给非关键性负载确保电力供需平衡,提高电网的稳定性。文章通过回顾该领域已有文献,综述了电力弹簧的提出背景、模型以及稳态运行原理;探讨了限制条件对电力弹簧有效运行范围的影响;对不同版本的ES从拓扑结构和实现功能两方面进行了评价。详细阐述了电力弹簧现有的主要控制方法,并总结了它们各自的优势、存在问题以及适用范围。对已开发的ES功能和应用进行了分类总结和分析。最后,对电力弹簧技术今后的主要研究方向进行了展望。

Power system with high penetration rate of renewable energy is prone to various problems due to power imbalance between supply and demand,affecting safe operation of power system.As a new technology,electric spring(ES)can overcome the shortcomings in existing demand-side management mode,ensures power balance between supply and demand and enhances grid stability by transferring fluctuating energy to non-critical loads.Reviewing existing literature in this field,the paper overviews the background,models and steady-state operation principles of electric spring.The influence of limiting conditions on effective operating range of ES is discussed.Different versions of ES are compared and evaluated in terms of topology and function.Existing control methods of ES are expounded in detail,and their advantages,existing problems and application scope are summarized.The developed ES functions and applications are summarized and analyzed.Finally,some possible research directions of electric spring technology in the future are prospected.