Study On The Equivalent Resistance Method To Simplify The Calculation Of Line Loss

As the lifeline of the national economy, the energy has been playing a very importantfactors. Rational use and conservation of energy, not only can greatly reduce the productioncost, but also has the profound significance to the development of society.To carry out thetheoretical line loss calculation of distribution network, reduce energy consumption, and isvery important for the conservation of resources and improve the competitiveness ofenterprises.This paper studies the calculation method of the existing theoretical line losses in powerdistribution networks, such as the theoretic line loss calculation method of high voltagedistribution network. The average current method, maximum current method, current method,the method of equivalent resistance and equivalent resistance method, voltageloss, theoreticline loss calculation method of low voltage distribution network loss method, and discussesthe advantages and disadvantages of calculation various methods.According to the distribution lines10kV\0.4kV analysis of influence factors ofthetheoretical line loss calculation. In the theoretical line loss calculation of distribution of10kV, the load factor of power distribution lines and the distribution transformer is notexactly the same, so the calculation of equivalent resistance distribution lines andtransformerusing the rated capacity of the distribution transformer is not consistent with the actualsituation. In the theoretical line loss calculation of distribution of0.4kV,the lack of structureparameters and operating data completeness and accuracy are the main influence factors.Based on the parameters of transmission lines, transformersummed up the equivalent circuittransmission lines and transformers, combined with the operation data of distribution lines,sorting out the equivalent mathematical model for line conductor loss, loss, loss oftransformer windings of transformer core, parallel capacitor loss. Finally, combining the basicideas and methods of the equivalent resistance of the advantages and disadvantages of thetraditional, the equivalent resistance method is improved. Data analysis shows that, the new algorithm can satisfy the approximate value of thehead end current morphological parameters and the maximum, minimum current,algorithmguaranteed error between-0.2to+0.01, meet the theoretical calculation method on the samelevel of accuracy, but from a practical point of view, a newalgorithm based on the operationdata collected demand small, at the same timecalculation line loss calculation accuracy canmeet the requirements of.