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Improved Operation Strategy with Alternative Control Targets for Voltage Source Converter under Harmonically Distorted Grid Considering Inter-Harmonics

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  • Bo Pang

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Heng Nian

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract

This paper proposed an improved control method for grid-connected voltage source converter (VSC), when the grid voltage consisted of the integer harmonics and inter-harmonics. Control object of the proposed control can be alternated to achieve the sinusoidal current or smooth output power, which enhances the operation adaption of VSC under the harmonically distorted grid. On the basis of a PI regulator in the fundamental current control loop, the novel control strategy was proposed with a supplementary controller which consisted of a prepositive high-pass filter and a modified proportional-derivative controller. In the proposed control, the inter-harmonics could be suppressed without detecting frequency, while the traditional resonator was effective in the premise of knowing the harmonics frequency. Also, the influence of control gain on the steady performance and the stability of VSC was analyzed, and the influences on the fundamental control caused by the proposed controller were also analyzed to verify the practicability of the proposed control strategy. Finally, the effectiveness of the proposed strategy was verified by the experiments.

Suggested Citation

  • Bo Pang & Heng Nian, 2019. "Improved Operation Strategy with Alternative Control Targets for Voltage Source Converter under Harmonically Distorted Grid Considering Inter-Harmonics," Energies, MDPI, vol. 12(7), pages 1-14, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:7:p:1236-:d:218729
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    References listed on IDEAS

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    3. Emmanuel Guillen-Garcia & Angel L. Zorita-Lamadrid & Oscar Duque-Perez & Luis Morales-Velazquez & Roque Alfredo Osornio-Rios & Rene De Jesus Romero-Troncoso, 2017. "Power Consumption Analysis of Electrical Installations at Healthcare Facility," Energies, MDPI, vol. 10(1), pages 1-14, January.
    4. Haipeng Xie & Zhaohong Bie & Yanling Lin & Chao Zheng, 2017. "A Hybrid Reliability Evaluation Method for Meshed VSC-HVDC Grids," Energies, MDPI, vol. 10(7), pages 1-17, July.
    5. Thuy Vi Tran & Seung-Jin Yoon & Kyeong-Hwa Kim, 2018. "An LQR-Based Controller Design for an LCL-Filtered Grid-Connected Inverter in Discrete-Time State-Space under Distorted Grid Environment," Energies, MDPI, vol. 11(8), pages 1-28, August.
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    Cited by:

    1. Sen Zhang & Jianfeng Zhao & Zhihong Zhao & Kangli Liu & Pengyu Wang & Bin Yang, 2019. "Decoupled Current Controller Based on Reduced Order Generalized Integrator for Three-Phase Grid-Connected VSCs in Distributed System," Energies, MDPI, vol. 12(12), pages 1-15, June.
    2. Bo Pang & Feng Li & Hui Dai & Heng Nian, 2020. "High Frequency Resonance Damping Method for Voltage Source Converter Based on Voltage Feedforward Control," Energies, MDPI, vol. 13(7), pages 1-16, April.

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