Research on Harmonic Traceability Method of Reference Meter Based on Power Comparison

Zhao, Zhihua; Xuejun, Bao; Huanning, Wang; Huang, Yan; Hengyu, Tan; Hu, Yao

doi:10.1109/icsgsc52434.2021.9490427

2021 5th International Conference on Smart Grid and Smart Cities (ICSGSC) 2021

DOI: 10.1109/icsgsc52434.2021.9490427

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Research on Harmonic Traceability Method of Reference Meter Based on Power Comparison

Zhihua Zhao

Bao Xuejun

Wang Huanning

et al.

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Control Design for the NPC Three-Level Grid-Connected Converter with Non-Ideal Grid System

Hou

Zang

2022

EEENG

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Background: The large-scale distributed new energy integrations brings about various non-ideal grid situations, which could deteriorate the control performance of grid-connected converters. Objective: This study aims to improve the control performance of this grid-connected converters when the grid is non-ideal. Methods: Firstly, a neutral point clamped (NPC) three-level grid-connected converter was studied, and the characteristics of non-ideal grid were analyzed in detail. Then, a real-time signal extraction method called generalized sliding discrete Fourier transform (GSDFT) is proposed to extract the non-ideal signals, e.g., harmonic components and negative sequence components, based on which a double closed loop control strategy was designed to improve the control performance of this grid-connected converters when the grid is non-ideal. Conclusion: Firstly, this paper analyzes the characteristics of non-ideal grid and establishes the mathematical model of NPC three-level grid-connected converter in non-ideal grid environment. Secondly, aiming at the problem of characteristic harmonics and negative sequence components in non-ideal power grid, a real-time and fast extraction method of non-ideal signals based on generalized sliding discrete Fourier transform is proposed. Finally, taking the three-phase grid current of grid-connected converter as the control target, the closed-loop control strategy of non-ideal signal extraction based on GSDFT is designed, and good control effect is achieved.

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Control Design for the NPC Three-Level Grid-Connected Converter with Non-Ideal Grid System

Hou

Zang

2022

EEENG

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Research on Harmonic Traceability Method of Reference Meter Based on Power Comparison

Cited by 1 publication

References 0 publications

Control Design for the NPC Three-Level Grid-Connected Converter with Non-Ideal Grid System

Control Design for the NPC Three-Level Grid-Connected Converter with Non-Ideal Grid System

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