Browsing by Author "ARIAS CASTRO, FRANCISCO MIGUEL"
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Thesis IMPACTO DE LAS RESTRICCIONES OPERACIONALES EN LA SUFICIENCIA DEL SING ANTE DIFERENTES NIVELES DE PENETRACIÓN EÓLICA(Universidad Técnica Federico Santa María, 2016) ARIAS CASTRO, FRANCISCO MIGUEL; ARIAS CASTRO, FRANCISCO MIGUEL; GIL SAGÁS, ESTEBAN MANUEL; Universidad Tecnica Federico Santa Maria UTFSM DEPARTAMENTO DE INGENIERÍA ELÉCTRICA; HINOJOSA MATEUS, VICTOR HUGOThis project studies changes in the operation of the SING under the consideration of several constrains, such as minimum stable level, minimum up times and loading ramps, also the influence of new wind farms. These considerations strongly influence on the operation of the system, since SING is almost entirely operated by conventional thermal plants, which is why regulatory flexibility and capacity of the system is reduced considerably from a system that has hydropower plants. SING operation is analyzed for its operating costs and adequacy metrics for 200 samples of forced outputs rate from the generating units. The operation of the system is analyzed with and without the transmission system, observing the sensitivity of the operation, in relation to the changes of spinning reserve in the system. It is noted that by incorporating the transmission system, the operation becomes less sensitive to variation in reserve levels. The minimum stable level constraint has the big impact on this analysis, since it restricts the operating point of the generators. It is established as the appropriate level of reserves 400MW, which corresponds to the maximum value of generation of the largest unit of the system. For proper operation of the system with the NCRE, it is required an adequate wind resource forecasting to make an optimum unit commitment of the other units in the system. To do this, it is use a BoxJenkins model, SARIMA(1; 0; 1)(1; 1; 1)24 and it makes a forecast of wind speed. Next, the model has to transform the wind forecasting to electrical power through a power-speed curve so that the forecast of the 4 wind farms is obtained The variation of wind penetration is simulated taking into account an amplification scalability factor, which reflects the size of the wind farm necessary for the better use of the wind resource. Once forecasts and profiles are generated, wind generation is added to the SING. This is done considering two distinct situations. First, the wind unit connected to the 220kV Crucero substation. Secondly, 4 plants connected in different parts of the SEP. The nominal power for both cases varies from 0 to 3000MW. It is determined that a system containing a wind diversified resource geographically, is less affected by the uncertainty of the wind resource considering similar levels of wind penetration. Subsequently, it is observed the effect that it has on the operation of the system and the sufficiency of the SING (considering wind power), the withdrawal of a conventional unit, CTH. It is observed that a decrease in the generation, not directly imply a decrease in the sufficiency of the system because the reserve may be overestimated. In terms of adequacy, 165MW power plant is similar to a wind farm of 600MW effect.
