Trunina H. Increasing the efficiency of voltage regulation in distributed electric networks with distributed generation

The dissertation is devoted to the decision of the actual scientific and applied task of increasing the efficiency of voltage regulation in DEN with DGS by optimal control of various types of voltage regulation in the conditions of alternating generating of DGS. On the basis of the analysis of methods of voltage regulation in electric networks of radial type with voltage 110/35/10 kV with DGS it was revealed that existing methods of voltage regulation have a number of shortcomings that adversely affect the efficiency of DGS with variable generating character in the composition of DEN. The mathematical models, algorithms of work and structural schemes of power control subsystems of DGS, reactive power of SVC and control systems of voltage transformer transformers are developed. The criterion of the optimization of voltage regulation in the DEN with DGS is formed, which minimizes power losses in the network and the number of switching positions of the systems of the transformer voltage transformers at the maximization of the output power of the DGS. Using the proposed criterion a co-ordinated control method was developed, on the basis of which a control system for various types of voltage regulation devices, such as transformer transformers, SVC and DGS, was developed. The conducted analysis of the results of the study showed that the application of the developed control system allows to increase the efficiency of voltage regulation in the DEN with DGS.