By incorporating a wind turbines into a diesel grid

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Unformatted text preview: a hybrid wind/diesel power systems an attractive proposition in many areas where there is an adequate wind resource. By incorporating a wind turbine(s) into a diesel grid offers the potential of decreased generation costs through fuel savings and reduced generator run times (lower maintenance). The ratio of the wind plant capacity to the peak grid load determines what is termed the penetration. Low penetration levels (less than 10%) need only basic control systems to interact with the primary diesel power 8-13 (Source: A wind diesel system may operate in up to three different modes, depending on the level of wind penetration. 1) The wind is below cut-in speed; hence the load is supplied by the diesel gensets. The voltage is controlled by the synchronous generator’s regulator and the frequency is controlled by the speed governor of the diesel engine. 8-14 2) The load is supplied jointly by the wind turbines and the genset. The system controller determines what capacity genset(s) to operate to ensure efficient diesel operation. 3) There is sufficient wind for the turbine to supply the load. As wind generated power increased gensets were progressively shut down. Where excess wind power is generated, this is either dumped as heat or used by a supplementary load such as water pumping or purification. The voltage and frequency is controlled by the turbines power electronics or a synchronous converter. References: [1] Heier, S., Grid Integration of Wind Energy Conversion Systems, John Wiley and Sons Ltd, UK, 1998. [2] Ackermann, T. and Söder, L., Wind energy technology and current status: a review, Renewable and Sustainable Energy Reviews, 4, 2000, p 348. [3] Carlin, P.W, Laxson, A.S., Muljadi E.B. The History and State of the Art of Variable-Speed Wind Turbine Technology. NREL/TP-500-28607. 2001. [4] Schreiber D. State of the Art of Variable Speed Wind Turbines. 11th International Symposium on Power Electronics Ee 2001. [5] Manwell, J.F., McGowan, J.G. and Rogers, A.L. (2002) Wind Energy Explained – Theory, Design and Application, John Wiley and Sons, UK, p239. Useful websites: 8-15...
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This note was uploaded on 06/09/2011 for the course PV 5053 taught by Professor Aasd during the Three '11 term at University of New South Wales.

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