Jie Shao1, Zihao Zhang1, Quan Xu1, Tiantian Cai1, Junye Li1, Baicheng Xiang1, Shijie Li1, Xianfeng Xu2,*
Energy Engineering, Vol.122, No.6, pp. 2291-2307, 2025, DOI:10.32604/ee.2025.063302
- 29 May 2025
Abstract In response to the complex working conditions of the power grid caused by the high proportion of new energy access, which leads to insufficient output accuracy of the second-order generalized integrator (SOGI) phase-locked loop, this article proposes an improved frequency adaptive phase-locked loop structure for SOGI. Firstly, an amplitude compensation branch is introduced to compensate for the SOGI tracking fundamental frequency signal, ensuring the accuracy of the SOGI output orthogonal signal under frequency fluctuation conditions. Secondly, by cascading two adaptive SOGI modules, the suppression capability of low-order harmonics and Direct Current (DC) components has been More >
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