电器与能效管理技术 ›› 2023, Vol. 0 ›› Issue (9): 1-10.doi: 10.16628/j.cnki.2095-8188.2023.09.001

• 研究与分析 •    下一篇

储能接入配电网影响评估及自适应保护策略

朱立位1, 伏祥运1, 牛萌2, 渠展展2, 光鸿伟2, 宋家康1, 岳付昌1   

  1. 1.国网江苏省电力有限公司 连云港供电分公司, 江苏 连云港 222004
    2.可再生能源并网全国重点实验室(中国电力科学研究院有限公司), 北京 100192
  • 收稿日期:2023-06-11 出版日期:2023-09-30 发布日期:2023-11-23
  • 作者简介:朱立位(1981—),男,高级工程师,主要从事智能配电与分布式储能技术研究。|伏祥运(1977—),男,研究员级高级工程师,主要从事配电自动化与分布式电源接入技术研究。|牛 萌(1986—),女,高级工程师,主要从事电力储能运行及应用技术研究。
  • 基金资助:
    国网江苏省电力有限公司科技项目(SGJSLY00KJJS2200923)

Impact Assessment and Adaptive Protection Strategy of Energy Storage Access into Distribution Network

ZHU Liwei1, FU Xiangyun1, NIU Meng2, QU Zhanzhan2, GUANG Hongwei2, SONG Jiakang1, YUE Fuchang1   

  1. 1. Lianyungang Power Supply Company,State Grid Jiangsu Electric Power Co.,Ltd., Lianyungang 222004, China
    2. National Key Laboratory of Renewable Energy Grid-Integration,China Electric Power Research Institute, Beijing 100192, China
  • Received:2023-06-11 Online:2023-09-30 Published:2023-11-23

摘要:

随着新能源在电力系统中的比例逐年增加,储能成为日益重要的灵活调节支撑资源。储能系统一般通过电力电子设备接入电网,频繁的充放电可能会对电网的潮流与保护带来影响。通过分析电化学储能的源荷特性,在储能作为电源与负载两种情况下,考虑储能的不同运行状态和不同功率交换情况,基于典型配电网架构,研究不同位置故障时,在储能接入配电网后潮流变化对传统保护的影响进行评估,提出自适应电流保护方案以及具体保护措施。最后,通过仿真验证了所提自适应电流保护方案的有效性。

关键词: 储能, 保护故障, 影响评估, 自适应保护策略, 配电网

Abstract:

With the increasing of new energy in the power system year by year,energy storage has become an increasingly important flexible regulatory resource.Energy storage systems are generally connected to the power grid through power electronic devices,while frequent charging and discharging may have an impact on the power flow and protection of the grid.By analyzing the source load characteristics of electrochemical energy storage,considering the different operating states and power exchange situations of energy storage as a power source and a load.based on a typical distribution network architecture,the power flow changes at different locations of faults are studied.The impact of energy storage connected to the distribution network on traditional protection is evaluated,and the adaptive current protection schemes and specific protection measures are proposed.Finally,the effectiveness of the adaptive current protection scheme is verified by simulation.

Key words: energy storage, protection failure, impact assessment, adaptive protection strategy, distribution network

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