Model Predictive Direct Power Control of Grid-connected Converters Considering Unbalanced Filter Inductance and Grid Conditions

Weichen Yang; Shihong Miao; Zhiwei Liu; Ji Han; Yulong Xiong; Qingyu Tu

doi:10.35833/MPCE.2021.000355

Journal of Modern Power Systems and Clean Energy (Jan 2021)

Model Predictive Direct Power Control of Grid-connected Converters Considering Unbalanced Filter Inductance and Grid Conditions

Weichen Yang,
Shihong Miao,
Zhiwei Liu,
Ji Han,
Yulong Xiong,
Qingyu Tu

Affiliations

Weichen Yang: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Hubei Electric Power Security and High Efficiency Key Laboratory, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,Wuhan,China,430074
Shihong Miao: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Hubei Electric Power Security and High Efficiency Key Laboratory, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,Wuhan,China,430074
Zhiwei Liu: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Hubei Electric Power Security and High Efficiency Key Laboratory, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,Wuhan,China,430074
Ji Han: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Hubei Electric Power Security and High Efficiency Key Laboratory, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,Wuhan,China,430074
Yulong Xiong: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Hubei Electric Power Security and High Efficiency Key Laboratory, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,Wuhan,China,430074
Qingyu Tu: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Hubei Electric Power Security and High Efficiency Key Laboratory, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,Wuhan,China,430074

DOI: https://doi.org/10.35833/MPCE.2021.000355
Journal volume & issue: Vol. 9, no. 6
pp. 1279 – 1288

Abstract

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The grid-connected converter (GCC) is widely used as the interface between various distributed generations and the utility grid. To achieve precise power control for GCC, this paper presents a model predictive direct power control (MPDPC) with consideration of the unbalanced filter inductance and grid conditions. First, the characteristics of GCC with unbalanced filter inductance are analyzed and a modified voltage control function is derived. On this basis, to compensate for the power oscillation caused by unbalanced filter inductance, a novel power compensation method is proposed for MPDPC to eliminate the DC-side current ripple while maintaining sinusoidal grid current. Besides, to improve the control robustness against mismatched filter inductance, a filter inductance identification scheme is proposed. Through this scheme, the estimated value of filter inductance is updated in each control period and applied in the proposed MPDPC. Finally, simulation results in PSCAD/EMTDC confirm the validity of the proposed MPDPC and the filter inductance identification scheme.

Published in Journal of Modern Power Systems and Clean Energy

ISSN: 2196-5420 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Production of electric energy or power. Powerplants. Central stations; Technology: Mechanical engineering and machinery: Renewable energy sources
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8685265

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