Abstract
The purpose of this study is to develop a methodology for modeling the characteristics of a fuel-free energy source (BIEN) as part of a wind turbine and an energy accumulator (AE) based on data from one and a half year three-level measurements of wind parameters with a 10-minute resolution at a mast wind measuring complex (VIC) in the village of Temryuk (Krasnodar Territory). The technical criteria and conditions necessary and sufficient for the creation of a BIEN based on wind turbines and AE have been determined. Taking into account the time structure of the wind, the optimal ratios of nominal wind turbine capacities and battery capacities providing fuel-free energy supply according to specified load schedules at monthly and annual time intervals have been determined. The developed technique is numerically implemented in the form of programs in C++ and in the EXСEL environment and verified during methodological multivariate calculations. The results of the calculations and analysis of the operating modes of the BIEN allowed us to establish that in order to ensure the functions of the BIEN throughout the year in wind-climatic conditions in the Temryuk area, it is necessary to use a large capacity as part of the BIEN AK (a multiple of energy consumption from five to ten days) and wind turbines of rated power exceeding the power consumption by 5 times or more. It has been established that the wind turbine of the nominal capacity optimal for BIEN provides annual electricity generation exceeding the specified annual consumption by 5-10 times, which is supposed to be used for technological purposes in the form of electric or thermal energy. The optimal ratios of the rated power of the wind turbine and the capacity of the AC components of the BIEN with an annual guarantee of fuel-free energy supply are determined by the developed methodology based on the data from 10-minute measurements on the VIC. At the same time, as calculations show, their fairly accurate annual values can be estimated from measurements of wind speeds in the least wind–provided months (in the Temryuk area in July), which significantly reduces the time and cost of pre-design surveys in terms of wind monitoring.
Keywords
wind power plant, energy storage system, battery capacity, temporary variability of wind, load schedule (energy consumption)
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