Primary Frequency Control Scheme for Fixed-Speed Dish-Stirling Solar-Thermal Power Plant
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IEEE The ability of induction generator-based dish-Stirling (DS) solar-thermal power plant in providing primary frequency control is examined. A dynamic model of the power plant is developed in which the receiver/absorber temperature of the Stirling engine is allowed to vary. Primary frequency control is achieved through the adaptive regulation of the receiver temperature set-point and the droop setting of the output power-temperature characteristics of the DS system. However, the penetration level of the solar-thermal generation into grid system has to be constrained to avoid the onset of instability due to the non-minimum phase characteristics of the DS. Transient droop compensation technique is then proposed to alleviate the instability issue, and results in an increase in the allowable DS penetration level.
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