Diseño e implementación de un PLL con altro rechazo de perturbaciones para la sincronización de un inversor trifasico con la red eléctrica

Consulta en la Biblioteca ETSI Industriales (8642)[ES] Como se ha visto uno de los principales problemas asociados a la conexión de paneles solares fotovoltaicos a la red eléctrica consiste en la degradación de la calidad de la corriente generada por los convertidores DC-AC, cuando la tensión del punto de conexión común se encuentra distorsionada y presenta variaciones de frecuencia. Para mejorar la calidad de la potencia inyectada a la red, se abordara el diseño de un sistema digital de sincronización con la red eléctrica trifásica basado en un PLL, lo cual deberá presentar un alto rechazo a perturbaciones en forma de desequilibrios y distorsión armónica de la tensión, con independencia de la variación de la frecuencia. Dicho PLL se integrara en el control lineal en lazo cerrado de un inversor comercial de 25kW, y deberá ser programado en un procesador digital del señal (DSP) orientado a aplicaciones de electrónica de potencia.David-Grignot, S. (2011). Diseño e implementación de un PLL con altro rechazo de perturbaciones para la sincronización de un inversor trifasico con la red eléctrica. http://hdl.handle.net/10251/30537.Archivo delegad

Analytical study of on-chip generations of analog sine-wave based on combined digital signals

On-chip sine-wave signal generation is widely covered by literature for Built-In-Self Test (BIST) or biosensor applications. The objective is to generate pure and robust sinewave signal with minimal hardware resources. An attractive solution consists in combining several digital signals to built this analog sine-wave. The objective of this paper is to give an analytical study of various potential solutions based on digitalbased approaches. Thanks to this study, we prove that technique consisting in setting the phase shifts and various amplitude values of the square-wave signals is the most efficient approach. Moreover, this study allows the selection of the best solution in terms of parameters of the square-wave signals to cancel loworder harmonics of the generated signal

On-chip Generation of Sine-wave Summing Digital Signals: an Analytic Study Considering Implementation Constraints

In the context of biosensor as much as Built-In-Self Test (BIST), on-chip sine-wave signal generation is a recurring research topic. Considering the implementation constraints, it implies a trade-off between the amount of resources and the signal quality. An attractive solution consists in combining several digital signals to build this analog sine-wave. The objective of this paper is to give an analytic study of various potential digital-based solutions. Thanks to this study, we prove that the technique consisting in setting the phase shifts and various amplitude values of the square-wave signals is the most efficient approach. This study allows the selection of the optimal square-wave signal parameters to cancel low-order harmonics of the generated signal. We proposed a solution for specification-oriented definition of the architectur