The monograph has solved an actual scientific problem, improving the efficiency of electricity networks by developing methods of compensation current non-active components under harmonic distortions and unbalance of mains supply voltage. The research of the compensation system working processes in time- and frequency-domain allows to reach the positive effect for the developed method. The necessity of the analytical methods for analysis of nonlinear elements of electrical systems in the frequency-domain development have been grounded. The expediency and efficiency of the usage of small...