Modeling and analysis of harmonic interaction between multiple grid-connected inverters and the utility grid

作者：Xu Dezhi; Wang Fei^*; Mao Hualong; Ruan Yi; Zhang Wei

来源：Proceedings of the CSEE, 2013, 33(12): 64-71.

• Distributed power generation systems
• Grid connected inverters
• Grid current
• Harmonic interactions
• Modeling and analysis
• Nonlinear characteristics
• Nonlinear factors
• Single-phase grid-connected inverters

Harmonic interaction between the grid-connected inverters and the utility grid may be introduced when more and more inverters were coupled to a same point of common coupling (PCC), which was a potential risk for stable and effective operation of distributed power generation systems. Mechanisms of the harmonic resonance in distributed impedance networks were firstly analyzed in terms of electric circuit theories in this paper. To increase the accuracy of the proposed model, the dead-time effects and nonlinear characteristics of switching devices were modeled and incorporated into the developed model. For analyzing the harmonic interaction, an output-impedance based model of single-phase grid-connected inverters with the LCL filter based on a dual-loop control scheme was proposed. Based on the developed model, the harmonic interaction of multiple inverters with the grid was modeled and analyzed. Simulation results are presented to demonstrate the effectiveness of the modeling method and the harmonic interaction analysis method.

• 出版日期2013
• 单位上海大学