Design and Optimization of a High-Frequency Oscillation Suppression Strategy for the Grid-Connected Inverter of a Permanent Magnet Direct Drive Wind Turbine

Zhaoyang Liu, Yubo Yuan, Chuang Liu (), Cong Sun and Zijun Bin
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Zhaoyang Liu: Department of Electric Engineering, Northeast Electric Power University, Jilin 132013, China
Yubo Yuan: Electric Power Research Institute State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
Chuang Liu: Department of Electric Engineering, Northeast Electric Power University, Jilin 132013, China
Cong Sun: Department of Electric Engineering, Northeast Electric Power University, Jilin 132013, China
Zijun Bin: Electric Power Research Institute State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China

Energies, 2025, vol. 18, issue 7, 1-20

Abstract: With the development of the new power system with a high proportion of new energy and a high proportion of power electronic equipment, various problems caused by high-frequency oscillation will seriously affect the daily normal operation of the power system. For the existing active oscillatory suppression strategies, the impedance characteristics of other frequency bands will be affected, which may cause new oscillation problems in other frequency bands, namely the negative effect of oscillatory suppression strategy. In response to such phenomena, we conducted research on the mechanism of negative effects and optimize the control strategies accordingly. First, an analysis model of the grid-connected inverter was established. The concept of the damping factor was proposed based on the relationship between passive damping and active damping. The feasibility of the oscillation suppression mechanism based on the damping factor was demonstrated, and the negative effect mechanism of the oscillation suppression strategy was clarified. Secondly, a control strategy based on the superposition of active damping was proposed, which not only solved the negative effect of the oscillation suppression strategy but also avoided the shift of the inherent resonance point. Finally, the theory was verified based on the MATLAB R2022a/Simulink simulation platform.

Keywords: suppression strategies; high-frequency oscillation; damping factor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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