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Resonance suppression strategy for multi-inverter grid connected system based on ILADRC
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Ai Feng1, Zhiman He1, Congyu Zhang1, Yunchou Long1, Qing Wei1, Tianyan Jiang2
Renewable Energy Resources | 2025, 43(1) : 115 - 123
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Renewable Energy Resources | 2025, 43(1): 115-123
Resonance suppression strategy for multi-inverter grid connected system based on ILADRC
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Ai Feng1, Zhiman He1, Congyu Zhang1, Yunchou Long1, Qing Wei1, Tianyan Jiang2
Affiliations
  • 1 Wanzhou Power Supply Branch State Grid Chongqing Electric Power Company Chongqing 404000 China
  • 2 School of Electrical and Electronic Engineering Chongqing University of Technology Chongqing 400054 China
Published: 2025-01-20
Outline
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A dual closedloop control strategy based on a combination of linear auto disturbance rejection and proportional integral control is proposed to address the resonance phenomenon of multiple inverters connected to the grid caused by the coupling effect between grid impedances. Firstly, based on the topology of multiple inverters, a mathematical model of the grid connected system with multiple inverters is established, and the mechanism of resonance generation is analyzed; Then, an equivalent circuit model of a multi inverter grid connected system is established, and the thirdorder system is processed in stages. The secondorder system adopts secondorder auto disturbance rejection, and the firstorder system adopts proportional integral control, forming a dual closedloop control strategy; Furthermore, the Lyapunov stability function is established to prove the stability of the closedloop control system; Finally, establish a digital simulation model of the parallel inverter system, and compare the simulation results of PI, 3rd order auto disturbance rejection, and improved linear auto disturbance rejection simultaneously; The results show that the proposed dual closedloop control strategy not only has excellent resonance suppression ability, but also can achieve better stability of the system.

multi-inverter grid connected system  /  resonance phenomenon  /  linear auto disturbance rejection  /  proportional integral control
Ai Feng, Zhiman He, Congyu Zhang, Yunchou Long, Qing Wei, Tianyan Jiang. Resonance suppression strategy for multi-inverter grid connected system based on ILADRC[J]. Renewable Energy Resources, 2025 , 43 (1) : 115 -123 .
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Article Info
  • Receive Date：2023-11-24
  • Online Date：2025-07-18
  • Published：2025-01-20
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  • Received：2023-11-24
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Affiliations
    1 Wanzhou Power Supply Branch State Grid Chongqing Electric Power Company Chongqing 404000 China
    2 School of Electrical and Electronic Engineering Chongqing University of Technology Chongqing 400054 China
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