上海交通大学学报 ›› 2022, Vol. 56 ›› Issue (5): 543-553.doi: 10.16183/j.cnki.jsjtu.2021.418

所属专题: 《上海交通大学学报》“新型电力系统与综合能源”专题(2022年1~6月)

• 新型电力系统与综合能源 •    下一篇

多源配网主动孤岛恢复过程电压频率波动的平抑方法

陈春1(), 高靖1, 曹一家1, 王炜宇1, 赵龙2   

  1. 1.长沙理工大学 电气与信息工程学院,长沙 410114
    2.长园深瑞继保自动化有限公司,广东 深圳 518057
  • 收稿日期:2021-12-08 出版日期:2022-05-28 发布日期:2022-06-07
  • 作者简介:陈春(1987-),男,湖南省株洲市人,副教授,从事智能配电网规划与自愈控制研究.电话(Tel.):15116439190;E-mail: chch3266@126.com.
  • 基金资助:
    国家自然科学基金(52007009);湖南省自然科技基金(2020JJ5574);湖南省教育厅优秀青年项目(19B003)

Voltage and Frequency Suppression of Intentional Islanding Restoration Process for Distribution System with Multi-Generations

CHEN Chun1(), GAO Jing1, CAO Yijia1, WANG Weiyu1, ZHAO Long2   

  1. 1. School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410114, China
    2. Changyuan Shenrui Relay Automation Co., Ltd., Shenzhen 518057, Guangdong, China
  • Received:2021-12-08 Online:2022-05-28 Published:2022-06-07

摘要:

多源配网主动孤岛恢复是极端条件下保障关键负荷供电的重要手段,有利于提高配电网的供电可靠性.主动孤岛恢复过程中存在负载和分布式电源组网瞬间产生暂态电压、频率波动的问题,影响孤岛安全稳定运行,严重时还会出现组网失败.为此,考虑储能系统功率响应的快速性,建立基于储能控制的主动孤岛动态组网电压、频率波动平抑模型,设计电压电流双环前馈扰动补偿控制系统,提出改进双环控制的储能系统矢量控制方法,解决了传统V/f控制电压偏移和电压波动过大问题.依据黑启动原则,利用MATLAB/Simulink软件搭建不同控制方式下的仿真模型,仿真结果表明:相较于采用传统V/f控制,基于矢量法的改进双环控制具有较强的抗干扰能力,能够明显改善孤岛黑启动自组网过程和孤岛并入主网瞬间的电压及频率波动,提高系统的动态响应性能.

关键词: 多源配网, 主动孤岛恢复, 自组网, 波动平抑, 改进双环控制

Abstract:

Intentional islanding restoration of distribution systems with multi-generations is of great importance to ensure the power supply of critical loads under extreme conditions, which is beneficial to improve the reliability of distribution systems. There are transient voltage and frequency fluctuations in the process of intentional islanding restoration, when the loads and distributed generations are gradually connected to the grid. The safety and stability of the intentional islanding are affected by the fluctuations, and networking process may fail in serious cases. Hence, the rapid power response of the energy storage system is utilized to suppress voltage and frequency fluctuations. A fluctuation suppression model based on energy storage system control is established, where a voltage and current double-loop feed-forward disturbance compensation control system is designed. A vector control method for energy storage system with improved dual-loop control is proposed, which solves the problems of traditional V/f control voltage offset and excessive voltage fluctuation. MATLAB/Simulink is used to build simulation models in different control modes in accordance with the black-start principle. The simulation results show that the improved double-loop control based on the vector method has a stronger anti-interference ability and significantly improved the islanding black-start self-organizing networking process. Voltage and frequency fluctuations are reduced, and the dynamic response performance of the system is improved.

Key words: distribution system with multi-generations, intentional islanding restoration, ad hoc network, fluctuation suppression, improved dual-loop control

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