吴林林,刘辉,黄贤淼,邵尹池,赵洋,朱学森

• 1:国网冀北电力科学研究院(华北电力科学研究院有限责任公司)

摘要(Abstract)：

针对构网型变换器预同步过程时电力系统频率电压稳定性低导致变换器并网失败的问题，提出一种基于改进线性自抗扰控制（LADRC）的构网型变换器预同步控制策略。首先，采用无锁相环（PLL）控制策略，通过相位偏差的反馈控制对网侧电压的相位和幅值进行快速同步追踪，可避免因PLL精度较低和响应速度慢而引起的电力系统稳定性降低的问题。在此基础上，在有功频率支路模块的角频率输出端引入LADRC，这可以有效解决预同步控制过程中变换器输出电压频率存在过冲的问题，从而确保构网型变换器预同步控制顺利进行最终实现成功并网。最后，在MATLAB/Simulink仿真平台中搭建基于改进LADRC的构网型变换器预同步控制模型并进行仿真验证，结果表明所提控制策略可以有效抑制系统频率震荡，并能够加速系统预同步进程，确保构网型变换器安全运行最终实现成功并网，仿真结果验证了所提方法的有效性。

关键词(KeyWords)： 构网型变换器;预同步控制;自抗扰控制;无锁相环控制;有功频率支路

Abstract:

Keywords:

基金项目(Foundation): 国网冀北电力有限公司科技项目(52018K23000G)~~

作者(Author): 吴林林,刘辉,黄贤淼,邵尹池,赵洋,朱学森

DOI: 10.19666/j.rlfd.202404073

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