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Novel Control Strategy for Enhancing Operating Range of PV Inverter
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Liegang HUANG, Jianping ZHOU, Hao YANG, Jingtao ZHOU
Journal of Power Supply | 2026, 24(3) : 79 - 87
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Journal of Power Supply | 2026, 24(3): 79-87
• Renewable Energy Generation and Energy Storage •
Novel Control Strategy for Enhancing Operating Range of PV Inverter
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Liegang HUANG, Jianping ZHOU, Hao YANG, Jingtao ZHOU
Affiliations
  • College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
Published: 2026-03-30 doi: 10.13234/j.issn.2095-2805.2026.3.79
Outline
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Cascaded H-bridge photovoltaic (PV) inverters are susceptible to problems such as shading of PV modules and aging of devices. As a result, an imbalance in the output power between H-bridge units will appear, and over-modulation may occur in some units due to excessive power, resulting in a poor performance of grid-connected current and triggering the instability of the inverter system as a whole. Aimed at this problem, a segmented improved control strategy for enhancing the operating range of the PV inverter is proposed. This method compensates the third-order harmonic and multiple harmonics for some of the overmodulated units. For the severely overmodulated units, their output power are reduced at first, and then the multiple harmonics are compensated. This strategy expands the operating range of the inverter, and it ensures that no overmodulation occurs in all the units under severe power imbalance. In addition, the waveform of grid-connected current is good. The theoretical analysis and simulation results prove the feasibility and effectiveness of the novel control strategy.

Photovoltaic (PV) inverter  /  overmodulation  /  harmonic compensation  /  severe power imbalance
黄烈钢, 周建萍, 杨浩, 周靖涛. 提升光伏逆变器运行范围的新型控制策略. 电源学报, 2026 , 24 (3) : 79 -87 . DOI: 10.13234/j.issn.2095-2805.2026.3.79
Liegang HUANG, Jianping ZHOU, Hao YANG, Jingtao ZHOU. Novel Control Strategy for Enhancing Operating Range of PV Inverter[J]. Journal of Power Supply, 2026 , 24 (3) : 79 -87 . DOI: 10.13234/j.issn.2095-2805.2026.3.79
Funding
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  • National Natural Science Foundation of China(61905139)
Appendix
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Year 2026 volume 24 Issue 3
33
4
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.3.79
  • Receive Date：2023-08-25
  • Online Date：2026-10-29
  • Published：2026-03-30
Article Data
Affiliations
History
  • Received：2023-08-25
  • Revised：2023-10-25
  • Accepted：2023-11-06
Funding
National Natural Science Foundation of China(61905139)
Affiliations
    College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
References
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光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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