Transient analysis of mixed wind parks with different turbine types

espanolLa turbina eolica de viento variable se volvio el tipo dominante de turbina en nuevos parques eolicos debido a sus ventajas tecnologicas. En caso de parques eolicos ya en funcionamiento con turbinas basadas en viento constante, la migracion de una tecnologia hacia la otra se vuelve economicamente inviable, lo que requiere su modernizacion gradual. En ese sentido, este articulo presenta un analisis de un parque eolico mixto de generadores de induccion con jaula de ardilla y doblemente alimentados, simulando el reemplazo gradual de algunas unidades de velocidad fija por otras de velocidad variable. El estudio abarca aspectos de estabilidad de tension, analisis de faltas, variacion de la velocidad del viento y tiempo critico de eliminacion de faltas. El sistema de potencia empleado es un sistema real brasileno y los resultados muestran que generadores de induccion doblemente alimentados mejora el desempeno del parque eolico en distintos aspectos, siendo una solucion economicamente efectiva. EnglishThe variable-speed wind turbine is widely used in new wind parks and became the dominant type of wind turbine due to its technological advantages. However, in the case of already installed wind parks based on fixed speed wind turbines, the immediate migration from one technology to another becomes economically impracticable; the process of gradual modernization is more suitable. In this sense, this paper presents a detailed analysis of a mixed wind park containing both doubly fed and squirrel cage induction generators. It considers different rates of capacity for each technology and implementing the gradual replacement of some fixed speed units by variable speed units. The study addresses aspects of voltage stability, fault analysis, wind speed variation and critical fault clearance time. The network used to perform simulations is a real system from Brazil. The results show that DFIG improves the wind park behavior in many aspects and can be a cost-effective solution.

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