RESEARCH ON GRID-SIDE CONTROL OF WIND POWER GENERATION BASED ON FRACTIONAL LCL FILTER

Li Xiaocong; Luo Xueli; Hou Liliang; Xu Junhua

doi:10.19912/j.0254-0096.tynxb.2021-0601

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 383-391. DOI: 10.19912/j.0254-0096.tynxb.2021-0601

RESEARCH ON GRID-SIDE CONTROL OF WIND POWER GENERATION BASED ON FRACTIONAL LCL FILTER

Li Xiaocong^1,2, Luo Xueli¹, Hou Liliang¹, Xu Junhua¹

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Abstract

With the popularization and application of wind power technology, improving the quality of wind power grid-connected power is of great significance to the stability of the power system. In order to improve the quality of grid-connected power, this paper proposes the use of a fractional-order PI （fractional-order PI, ^λ） controller to achieve grid-side control, and a fractional-order LCL （fractional-order LCL, FOLCL） filter for filtering. Firstly, it is deduced by mathematical theory theory that FOLCL filter can fundamentally avoid the characteristic of resonance. Then a fractional-order mathematical model of the grid-side inverter system is established, and a fractional-order double closed-loop control structure is derived. Finally, the PI^λ controller is introduced on the grid side and its parameters are designed. The experimental simulation results show that of the FOLCL filter can effectively avoid resonance. The effect of the FOLCL filter designed in this paper is significantly better than that of the traditional integer-order LCL （IOLCL） filter. All indicators of the full fractional-step inverter grid-connected system built in this paper are significantly better than that of the traditional schemes.

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wind power / electric inverters / resonance / fractional calculus / LCL filter / PI^λ controller

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Li Xiaocong, Luo Xueli, Hou Liliang, Xu Junhua. RESEARCH ON GRID-SIDE CONTROL OF WIND POWER GENERATION BASED ON FRACTIONAL LCL FILTER[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 383-391 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0601

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