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The prediction algorithm is one of the most important factors in the quality of wind-power prediction. In this paper, based on the principles of wavelet transform and support vector machines (SVMs), as well as the characteristics of wind-turbine generation systems, two prediction methods are presented and discussed. In method 1, the time series of model input are decomposed into different frequency...
Air supply is one of the most important factors that influence the combustion of the volatile and carbon in a biomass fired boiler. For many biomass power generation plants, there is insufficient measure to assure the proper air supply. In this study, computational fluid dynamics (CFD) modeling of a double-grate biomass fired boiler was carried out. The three-dimensional Reynolds averaged Nervier-stokes...
The arithmetic of wind power prediction plays an important part in the development of wind power prediction. In this paper, based on the principles of support vector machine (SVM) and wavelet, the wavelet SVM model for short term wind power prediction is built up along with analyzing the characteristics of power curves of wind turbine generator systems. The operation data from a wind farm in North...
Numerical simulation of gas-solid flow in fluidized bed has been carried out based on two-fluid model (TFM) in the paper. The influence of different height of bed material, superficial velocity, restitution coefficient of granular elasticity, drag model and time step calculated on phase mixing and bubbles appeared was analyzed and investigated. The results showed that by using the same drag model,...
A numerical model of the flow field of a 48t/h grate-fired boiler was presented in this paper. The air distributions in the furnace under different air supply ratio were considered in order to get the optimum air ratio. The three-dimensional Reynolds averaged Nervier-stokes equation with the Standard k-epsilon Model was solved. The result showed that the airflow ratio played a significant role on...
This paper analyzed the energy consumption characteristics of typical limestone-gypsum wet flue gas desulfurization (FGD) system which is widely used in power plant for SOx removal, and discussed its optimal operation. In the FGD system, booster fan; circulating slurry pump and oxidation fan are three major energy consuming devices. We established the mathematical models to disclose the relationship...
As a new modeling thought, the accurate analytical redundancy model of power plant critical parameters was established by data mining method, which obtained effective information from the large number of real-time operation data. The basic modeling mode, including data preprocessing, mining model, verification model and the strategy from data to analytical redundancy model, was proposed in the paper...
Gasification based biomass co-firing was an attractive technology for utilizing biomass as an additional fuel in utility boilers. Compared to directly co-firing biomass and coal, it showed following benefits: (1) avoiding biomass delivery into the boiler, (2) reduced boiler slagging, (3) avoiding altered ash characteristics. In co-firing demonstration project, higher percentage of biomass gas for...
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