HARMONIC RESONANCE SUPPRESSION STRATEGY OF THREE-PHASE LCL PHOTOVOLTAIC GRID-CONNECTED INVERTER BASED ON LADRC AND QUASI PR

Zhou Xuesong; Guo Shuaichao; Ma Youjie; Li Yuechao; Ma Chuang

doi:10.19912/j.0254-0096.tynxb.2021-1319

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (3) : 465-474. DOI: 10.19912/j.0254-0096.tynxb.2021-1319

HARMONIC RESONANCE SUPPRESSION STRATEGY OF THREE-PHASE LCL PHOTOVOLTAIC GRID-CONNECTED INVERTER BASED ON LADRC AND QUASI PR

Zhou Xuesong, Guo Shuaichao, Ma Youjie, Li Yuechao, Ma Chuang

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Abstract

Aiming at the harmonic resonance phenomenon of three-phase LCL photovoltaic grid connected inverter from its high frequency resonant peak, a current double closed loop control strategy based on third-order LESO combined with second-order LADRC and quasi PR control is designed. It can better weaken the high frequency resonant peak and suppress the harmonic resonance phenomenon of photovoltaic system. By designing Lyapunov function, it is proved that the closed-loop system will eventually converge stably. The simulation results show that the double loop control strategy has superior robustness and practical application value.

Key words

PV system / LCL-type inverter / linear active disturbance rejection / proportional resonance control / harmonic resonance phenomenon

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Zhou Xuesong, Guo Shuaichao, Ma Youjie, Li Yuechao, Ma Chuang. HARMONIC RESONANCE SUPPRESSION STRATEGY OF THREE-PHASE LCL PHOTOVOLTAIC GRID-CONNECTED INVERTER BASED ON LADRC AND QUASI PR[J]. Acta Energiae Solaris Sinica. 2023, 44(3): 465-474 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1319

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