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This paper presents a novel model for the short circuit analysis of PV inverter during transient period based on the dynamic phasor sequence component (DPSCs), especially the subtransient period (the first cycle after fault occurred). The model of photovoltaic (PV) inverter is presented as state space equations with DPSCs. The unbalanced fault condition can be given as the input vector in the state...
The PID controller tuning method based on desired dynamic equation is analyzed on its close-loop control performance and stability. The stable region calculation method for DDE-based PID controller is proposed based on Nyquist stability criterion and open-loop frequency response. Then the influence of tunable parameter k on set point tracking error is analyzed when the order of controller does not...
We present an efficient and fast algorithm for 3D mesh deformation in this paper. By edge collapse mesh simplification, our algorithm simplifies the original shape to a reduced mesh, which contains the salient feature of the original 3D shape. For the reduced mesh, we specify an affine transformation for each vertex called key point. According to the user's manipulation, the fixed or moved constraints...
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