CALCULATING OF REACTIVE POWER LOAD LOSSES IN ELECTRIC POWER LINES WITH THE USE OF FUZZY NUMBERS

Fuzzy numbers can be successfully used to calculate uncertainty range of considered values. Thanks to them is possible to get at once the result with a great deal of variants continually transferring from extreme pessimistic to most optimistic with the information about grade of possibility of appearance. Complicated rules of fuzzy arithmetic, sometimes enough drastic increasing hardship of calculating, are mainly reason for insignificant popularity of fuzzy numbers in practical applications. Deducting of final formulas for ranges of dispersions of considered values should influence for universalisation of fuzzy mathematics in engineer's calculations. Dealing with estimate of reactive power flow in electric lines ought to take into consideration not only consumption and/or generation of reactive power by load customers but also load losses and idle losses in proper branches of network diagram. These days in daily exploitation not always is being owned data which are needed for more precise calculating. The method for the calculating of ranges of technical reactive power losses values in electric power lines with the use of fuzzy arithmetic has been presented in this paper. The mathematical model has been formulated also relationships which are useful to fast calculate power losses dispersion have been presented. Mentioned relationships are enabled to computations of dispersions without necessity to take complete and complicated calculations on fuzzy numbers. The discussion and the analysis of elaborated fuzzy parameters have been carried out.