电工技术学报2018，Vol.33Issue(8)：1802-1813,12.DOI:10.19595/j.cnki.1000-6753.tces.161980
数字控制下光伏并网逆变器稳定性分析及参数优化设计
Stability Analysis and Parameter Optimization Design of Photovoltaic Grid-Connected Inverter under Digital Control
摘要
Abstract
For the photovoltaic grid-connected inverter, the z-domain model under digital control is established firstly. Then through the frequency characteristics of the z-domain open-loop transfer function, the conditions of ?180° crossing in different ranges of resonance angle frequency are determined. Meanwhile, combined with Nyquist criterion, the stability conditions of grid-connected inverter in different ranges of resonance angle frequency are given. Accordingly, the optimized design idea and method of photovoltaic grid-connected inverter are put forward, which can resist the wide range changes of grid equivalent impedance. Finally, the theoretical analysis is verified by the simulation and experiment.关键词
数字控制/光伏/并网逆变器/稳定性分析/优化设计/电网阻抗Key words
Digital control/photovoltaic/grid-connected inverter/stability analysis/optimized design/grid impedance分类
信息技术与安全科学引用本文复制引用
郑堃,周林,张前进,解宝,李海啸..数字控制下光伏并网逆变器稳定性分析及参数优化设计[J].电工技术学报,2018,33(8):1802-1813,12.基金项目
国家自然科学基金资助项目(51477021). （51477021）
