Influence of the expected wind speed fluctuation on the number of batteries of the balancing system
 
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National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
 
 
Corresponding author
Mykhailo Yaremenko   

National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
 
 
Power Electronics and Drives 2022;7 (42)
 
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ABSTRACT
The article presents a method of taking into account dependence of the number of batteries designed to balance energy in distributed generation systems with wind turbines, error of predicting the parameters of wind flow (wind speed) and ambient temperature. To describe the relationship between current rate and capacity in a given current range, Peukert's law is used. Dependence of the Peukert’s constant on ambient temperature for lead-acid battery HZB12-180FA is calculated. Taking the lead-acid battery and wind turbine VE-2 as a reference, dependence of area of controlled operation of the battery on the wind speed forecasting error is given. Technique of taking into account ambient temperature, depth of discharge and wind speed forecasting error when deciding size of energy storage of the balancing system (number of batteries and their capacity), is given. A family of curves of dependence of the balancing system batteries number on ambient temperature and wind speed forecasting error is presented. It is shown that as wind speed forecasting error increases from 0 to 15% and ambient temperature decreases from 20 °C to -20 °C, the number of batteries should be increased by approximately 2.81 times in order to maintain the same area of controlled operation.
eISSN:2543-4292
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