基于积分反馈频率无差控制的构网型储能黑启动频率稳定提升研究  

Research on Stable Enhancement of Black Start Frequency for Grid Forming Energy Storage System Based on Unbiased Integral Feedback Frequency Control

作　　者：渠展展 杨若奂 牛萌 杜杲娴 汪奂伶 刘雅婷 QU Zhanzhan;YANG Ruohuan;NIU Meng;DU Gaoxian;WANG Huanling;LIU Yating(China Electric Power Research Institute,Beijing 100092,China)

机构地区：[1]中国电力科学研究院有限公司,北京100092

出　　处：《电器与能效管理技术》2024年第11期20-28,44,共10页Electrical & Energy Management Technology

基　　金：中国电力科学研究院有限公司研究开发项目(长线攻关类)(DG83-21-010)。

摘　　要：构网控制可有效提升储能系统对电网的主动支撑能力,但在电网黑启动过程中,构网型储能系统自身调频特性引起的频率偏差会影响频率的稳定性,严重时可能导致频率失稳,黑启动失败。为提高构网型储能系统黑启动过程中的频率稳定性,提出一种积分反馈频率无差控制策略。通过在原有虚拟同步发电机(VSG)控制环路中添加积分反馈环路、改变系统阶数,实现黑启动过程中频率的无差调节,且无须引入锁相环、无须切换底层控制策略。最后,通过仿真验证控制效果及关键参数的变化对于控制性能的影响,证明控制策略的正确性与有效性。Grid forming(GFM)control can effectively improve the active support ability of energy storage system to the power grid.However,the frequency deviation introduced by frequency modulation characteristic of GFM energy storage system(ESS)will affect the frequency stability during black start process.In some extreme cases,it will lead to frequency instability and black start failure.To improve the frequency stability of GFM-ESS during black start process,an unbiased integral feedback frequency control is proposed.By adding an integral feedback loop to the virtual synchronous generator control loop and changing the system order,the frequency regulation is unbiased and then the control complexity is effectively reduced during the process of black start.Meanwhile,PLL and underlying control strategy switchover are not required.Finally,the control effect and the influence of the change of crucial parameters on the control performance are verified by the simulation,and the correctness and effectiveness of the control strategy are proved.

关 键 词：储能 黑启动 积分反馈频率 虚拟同步发电机控制 

分 类 号：TM73[电气工程—电力系统及自动化]