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An Optimal Sampling Control Strategy for LC-type Inverter
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Enze FAN1, 2, Yaohua LI1, 2, Qiongxuan GE1, Lu ZHAO1
Electric Drive | 2024, 54(8) : 42 - 47
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Electric Drive | 2024, 54(8): 42-47
An Optimal Sampling Control Strategy for LC-type Inverter
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Enze FAN1, 2, Yaohua LI1, 2, Qiongxuan GE1, Lu ZHAO1
Affiliations
  • 1 Key Laboratory of Power Electronics and Electric Drive（Institute of Electrical Engineering，Chinese Academy of Sciences），Beijing 100190，China
  • 2 School of Electronics，Electrical and Communication Engineering，University of Chinese Academy of Sciences，Beijing 100049，China
Published: 2024-08-20 doi: 10.19457/j.1001-2095.dqcd24918
Outline
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Under digital control，the inner current loop of the LC-type inverter is affected by the control delay，which leads to the weakening of its active damping effect. Increasing the sampling control frequency can effectively reduce the negative influence of digital control delay. Furthermore，in order to suppress the high order harmonic disturbance caused by strongly nonlinear load，multiple resonant controllers are needed in the outer voltage loop. For reducing the time complexity of the outer voltage loop and increasing the quantity of the controlled harmonics，an optimal sampling digital control strategy was proposed for the current and voltage double loop control of the LC-type inverter. Specifically，the inner current loop was set to the double sampling control frequency and the outer voltage loop was set to the single sampling control frequency. The optimal sampling digital control strategy enhance the suppression ability of nonlinear load disturbance and reduce the total harmonic distortion of the output voltage while maintaining the stability margin of the inner current loop. Finally，the feasibility and effectiveness of the proposed optimal sampling digital control strategy were verified by experiments.

LC-type inverter  /  active damping  /  nonlinear loads  /  multiple resonant controllers  /  sampling control
Enze FAN, Yaohua LI, Qiongxuan GE, Lu ZHAO. An Optimal Sampling Control Strategy for LC-type Inverter[J]. Electric Drive, 2024 , 54 (8) : 42 -47 . DOI: 10.19457/j.1001-2095.dqcd24918
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Year 2024 volume 54 Issue 8
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Article Info
doi: 10.19457/j.1001-2095.dqcd24918
  • Receive Date：2023-01-16
  • Online Date：2025-12-09
  • Published：2024-08-20
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History
  • Received：2023-01-16
  • Revised：2023-02-27
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Affiliations
    1 Key Laboratory of Power Electronics and Electric Drive（Institute of Electrical Engineering，Chinese Academy of Sciences），Beijing 100190，China
    2 School of Electronics，Electrical and Communication Engineering，University of Chinese Academy of Sciences，Beijing 100049，China
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