Simulation of the Load-Frequency Control of the Power System with Renewables -- On One Approach to Distribution Electrical Networks' State Estimation under Information Incompleteness Conditions -- Improving the Efficiency of HPP and PSHPP Participation in the Electricity Market of Ukraine -- Application of Modern Technologies for Automatic Control of Frequency and Power in Integrated Power Systems -- Short-Term Load Forecasting in Electrical Networks and Systems with Artificial Neural Networks and Taking Into Account Additional Factors -- Synthesis of Models of the Complex Electric Power Systems.