Summary. In this article an algorithm of power network’s regime optimization on complex transformer coefficients of series controlling transformers in loop is offered. The results of research the efficiency of described algorithm are presented.

Key words: power network, power losses, optimization of regime, algorithm of optimization, transformer, transformer coefficient, limitation.

Summary. In this article the effective algorithm of optimization of power networks regime on voltages of nodes with controllable reactive power  is offered. The results of research of calculation quality of the offered algorithm are presented.

Key words: power network, power losses, optimization of regime, algorithm of optimization, criterion function, limitations, iterative process, acceleration coefficient.