EN基于有源和无源阻尼协同控制的光伏直流升压汇集系统谐振抑制
Resonance Suppression of Photovoltaic DC Boost Collection System Based on Active and Passive Damping Cooperative Control
- 中国电力 2025年58卷第3期 页码：20-30
- 作者机构：
1.三峡大学 电气与新能源学院，湖北 宜昌 443002
2.三峡大学 新能源微电网湖北省协同创新中心，湖北 宜昌 443002
3.国网河南省电力公司南阳供电公司，河南 南阳 473000
- 作者简介：
[ "", "潘鹏程（1990），男，通信作者，博士，讲师，从事新型电力系统、分布式能源发电技术研究，E-mail：pcpan@whut.edu.cn" ]
[ "韩文舜（1995），男，硕士研究生，从事光伏并网系统的稳定性研究，E-mail：1732351624@qq.com" ]
- 基金信息：国家水运安全工程技术研究中心开放基金资助项目（B2022002）。
DOI：10.11930/j.issn.1004-9649.202402044
中图分类号：收稿：2024-02-19，
修回：2025-01-09，
纸质出版：2025-03-28
- 稿件说明：
移动端阅览
潘鹏程, 韩文舜, 郭雪丽. 基于有源和无源阻尼协同控制的光伏直流升压汇集系统谐振抑制[J]. 中国电力, 2025,58(3):20-30.
Pengcheng PAN, Wenshun HAN, Xueli GUO. Resonance Suppression of Photovoltaic DC Boost Collection System Based on Active and Passive Damping Cooperative Control[J]. Electric Power, 2025, 58(3): 20-30.
潘鹏程, 韩文舜, 郭雪丽. 基于有源和无源阻尼协同控制的光伏直流升压汇集系统谐振抑制[J]. 中国电力, 2025,58(3):20-30. DOI： 10.11930/j.issn.1004-9649.202402044.
Pengcheng PAN, Wenshun HAN, Xueli GUO. Resonance Suppression of Photovoltaic DC Boost Collection System Based on Active and Passive Damping Cooperative Control[J]. Electric Power, 2025, 58(3): 20-30. DOI： 10.11930/j.issn.1004-9649.202402044.
摘要
光伏直流升压汇集系统中，DC/DC换流器内部LC电路与开关电路因阻抗匹配而产生谐振问题，从而导致系统稳定性变差甚至崩溃。针对换流器因阻抗匹配产生的谐振问题，提出了有源和无源阻尼协同控制以消除谐振的方法。首先，建立了在不同工况下的换流器运行小信号阻抗模型。其次，利用阻抗比判据对比分析系统稳定性差异，并讨论了不同虚拟电阻对系统稳定性的影响。最后，通过将产生谐振峰值处的角频率点与其相邻正常角频率点的等效阻抗幅值之比限定为[0.95
1.15]，将阻尼电阻值在最大功率点跟踪（maximum power point tracking，MPPT）控制下换流器的闭环输出阻抗幅值提高了约1.5倍。研究结果表明，相比仅采用有源或无源阻尼法，所提协同控制策略使得产生谐振处的幅值由–15 dB增加到40.5 dB，提高约4倍，且系统具有较大的幅值和相角裕度，可有效提高系统的稳定性。
Abstract
In a photovoltaic DC collection system
the impedance matching between the LC circuit and switching circuit in the DC/DC converter is easy to generate resonance
which leads to the system stability deterioration or even collapse. In order to solve the resonant problem of the converter due to impedance matching
the active and passive damping cooperative control is proposed to eliminate the resonance. Firstly
the small-signal impedance model of the converter under different operating conditions is established. Secondly
the impedance ratio criterion is used to analyze the stability differences of the system
and the influence of different virtual resistance values on the system stability is discussed. Finally
by using the ratio of the equivalent impedance amplitude between the angular frequency point at which the resonance peak is generated and its neighboring normal angular frequency point limited between [0.95
1.15]
the closed-loop output impedance amplitude of the converter under MPPT control with the value of the damping resistor is obtained to be improved by about 1.5 times. The results show that compared with only active or passive damping control
the proposed cooperative control strategy increases the amplitude at resonance generation from -15dB to 40.5dB
which is about 4 times
and the system has large amplitude margin and phase margin
which effectively improve the stability of the system.
关键词
Keywords
references
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