Nonlinear Impedance Modeling of Grid-tied Converters Governed by PWM Saturation
2021 IEEE 2nd China International Youth Conference on Electrical Engineering (CIYCEE)（2021）
Abstract
The existing researches focus only on the linearized impedance model and the impedance-based stability issues. However, since there also exist many nonlinear components in control loops, their nonlinear dynamics are also needed to be accounted in some way for improving the modeling accuracy. To solve this problem, an impedance model with taking the saturation nonlinearity of Pulse-Width Modulation...
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Key words
Saturation,impedance model,nonlinear analysis,describing function method,grid-connected converters
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