EN兼具有源阻尼器功能的多功能光伏并网逆变器
兼具有源阻尼器功能的多功能光伏并网逆变器
- 太阳能学报 2025年第11期 页码：350-362
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DOI：doi:10.19912/j.0254-0096.tynxb.2024-1280
中图分类号： M46-
网络出版：2025-12-04，
纸质出版：2025-12-04
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屈艾文, 桂仁傲, 赵文波, 等. 兼具有源阻尼器功能的多功能光伏并网逆变器[J]. 太阳能学报, 2025,(11):350-362.
屈艾文, 桂仁傲, 赵文波, et al. 兼具有源阻尼器功能的多功能光伏并网逆变器[J]. 2025, (11): 350-362.
屈艾文, 桂仁傲, 赵文波, 等. 兼具有源阻尼器功能的多功能光伏并网逆变器[J]. 太阳能学报, 2025,(11):350-362. DOI： doi:10.19912/j.0254-0096.tynxb.2024-1280.
屈艾文, 桂仁傲, 赵文波, et al. 兼具有源阻尼器功能的多功能光伏并网逆变器[J]. 2025, (11): 350-362. DOI： doi:10.19912/j.0254-0096.tynxb.2024-1280.
摘要
为提高电网阻抗在变化范围大时光伏并网多逆变器并联系统稳定性
提出一种基于储能型准Z源逆变器的兼具有源阻尼器功能的多功能光伏并网逆变器
同时实现并网发电和谐振抑制功能。首先给出多功能并网逆变器电路参数设计准则
然后给出考虑锁相环影响的基于逆变器侧电流反馈的整体控制策略和控制参数设计方法。在控制策略中不仅通过在电容电流反馈环路中采用相位滞后补偿来增大其原始端口阻抗的相位裕度提高系统稳定性
且通过在多功能逆变器输出端构造满足阻尼目标谐振频段的虚拟阻抗以实现多逆变器并联系统的谐振抑制。最后通过实验验证了所提多功能光伏并网逆变器的可行性和有效性。
Abstract
In order to improve the stability of the photovoltaic （PV） grid-connected multi-inverter parallel system with widely varying grid impedance
a multi-functional PV grid-connected inverter with active damper function based on energy-stored quasi-Z-source inverter is proposed
which simultaneously achieves grid-connected power generation and resonance suppression. Firstly
the circuit parameter design criteria for the multi-functional grid-connected inverter are presented. Then
an overall control strategy based on inverter side current feedback
considering the influence of the phase-locked loop （PLL）
and the corresponding control parameter design method are provided. In the control strategy
the phase margin of the original port impedance is increased to improve the system stability by employing phase lag compensation in the capacitor current feedback loop. Additionally
the virtual impedance satisfying the damping target resonance frequency band is constructed at the output end of the multi-functional inverter to achieve resonance suppression in the multi-inverter parallel system. Finally
the feasibility and effectiveness of the proposed multi-functional PV grid-connected inverter are verified through experiments.
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references
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