| 引用本文: | 徐国圣,石 洋,洪 岩.基于超级电容的光伏并网功率波动平抑控制方法(J/M/D/N,J:杂志，M：书，D：论文，N：报纸).期刊名称,2025，42（5）：100-106 |
| CHEN X. Adap tive slidingmode contr ol for discrete2ti me multi2inputmulti2 out put systems[ J ]. Aut omatica, 2006, 42(6): 4272-435 |
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| 摘要: |
| 目的 针对光伏发电功率波动、单相全桥并网变换器二倍频功率波动,以及超级电容系统平抑光伏发电功率
波动时,其端电压大范围波动造成的越限等问题,提出一种基于超级电容的光伏并网功率波动平抑方法。 方法 首
先,通过在控制环路中串入陷波滤波器将系统二倍频功率分离,将波动功率作为超级电容响应的参考值,减少单相
全桥变换器的并网功率波动对电能质量的影响;然后,在超级电容控制环路中并入端电压瞬态恢复调节控制,实现
超级电容在动态响应后及时恢复能量,为后续功率波动平抑储备能量;其次,针对直流母线电压的高频波动,在超
级电容控制环路占空比中直接并入电压高频波动平抑控制,进一步提高直流母线电压的电能质量。 结果 通过建立
并网系统仿真模型,验证功率波动平抑方法的有效性和可靠性。 结论 试验结果表明:并网功率波动平抑控制方法
不仅实现了波动功率的合理分配,同时有效避免了超级电容端电压的越限,且提高了直流母线电压的电能质量。
关键词:光伏;超级电容;功率分配策略;陷波滤波器 |
| 关键词: 光伏 超级电容 功率分配策略 陷波滤波器 |
| DOI： |
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| Smoothing Control of PV Grid-connected Power Fluctuation Based on Supercapacitor |
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XU Guosheng SHI Yang HONG Yan
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Siyang Power Supply Branch State Grid Jiangsu Electric Power Co. Ltd. Jiangsu Suqian 223700 China
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| Abstract: |
| Objective Aiming at the issues of power fluctuations in photovoltaic PV generation double-frequency power
fluctuations in single-phase full-bridge grid-connected inverters and the large voltage fluctuations in supercapacitor
systems when smoothing PV power fluctuations that may cause over-limit problems a method for smoothing PV gridconnected power fluctuations based on supercapacitors is proposed. Methods Firstly the two-frequency power of the
system is separated by inserting a notch filter into the control loop and the fluctuating power is used as the reference value
for the supercapacitor response to reduce the impact of grid-connected power fluctuations of the single-phase full-bridge
converter on power quality. Secondly a terminal voltage transient recovery control is integrated into the supercapacitor
control loop to ensure that the supercapacitor can promptly restore its energy after dynamic response and reserve energy for
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control loop so as to further improve the power quality of the DC bus voltage. Results The effectiveness and reliability of
the power fluctuation smoothing method are verified through the establishment of a grid-connected system simulation
model. Conclusion The experimental results show that the grid-connected power fluctuation smoothing control method not
only achieves rational distribution of fluctuating power but also effectively avoids over-limit voltage issues in
supercapacitors and improves the power quality of the DC bus voltage. |
| Key words: photovoltaic supercapacitor power distribution strategy notch filter |
