宁夏电力Issue(5)：19-26,8.DOI:10.3969/j.issn.1672-3643.2025.05.003
基于光伏并网逆变器控制参数优化的宽频振荡抑制方法
Wideband oscillation suppression method for grid-connected photovoltaic inverters based on control parameter optimization
吴文涛 1叶伟 1袁焜 1张晗 1张云峰 1马智明1
作者信息
- 1. 青海德泓电力科技有限公司,青海 西宁 810000
- 折叠
摘要
Abstract
To suppress wideband oscillations in photovoltaic(PV)power generation systems under weak grid condi-tions,this paper proposes a control parameter optimization method for grid-connected inverters.First,the positive-and negative-sequence impedance models are established by analyzing the operating characteristics of the PV system.Se-cond,a multi-frequency finite difference method is applied to perform sensitivity analysis,which quantifies the global impact of current-loop control parameters on the system output impedance and identifies their optimization priorities and feasible ranges.Finally,based on the sensitivity results,the whale migration algorithm(WMA)is employed to optimize current-loop gain parameters.By balancing exploration-exploitation,the algorithm avoids local optima and achieves effi-cient convergence.Simulation results show that,compared with the unoptimized case,the minimum Euclidean distance of the positive-and negative-sequence Nyquist curves to point(-1,j0)increases by 0.94 and 0.96,respectively,while the phase margins in the Bode plots improve by58.098 5°and 68.631 4°,respectively.关键词
电流环控制参数优化/光伏并网逆变器/序阻抗模型/弱电网稳定性/宽频振荡抑制/灵敏度分析/Nyquist判据Key words
optimization of current-loop control parameters/grid-connected photovoltaic inverter/sequence impedance model/weak grid stability/wideband oscillation suppression/sensitivity analysis/Nyquist criterion分类
信息技术与安全科学引用本文复制引用
吴文涛,叶伟,袁焜,张晗,张云峰,马智明..基于光伏并网逆变器控制参数优化的宽频振荡抑制方法[J].宁夏电力,2025,(5):19-26,8.
