Models and methods for improving operational efficiency of electrical networks with distributed generation

Relevance of research. The thesis is devoted to the improvement and development of methods for the integrated assessment of the influence of distributed generation sources on the modes of operation of electrical networks. Electrical distribution networks in Iraq are old and many of them remain without maintenance with. Significant losses of power and energy. So, the need to install new transformers and electrical generating sources, to construct new distribution lines, to reduce power and energy losses by connecting electrical generating sources at best points into the electrical networks including using new power electronic device is an extremely actual problem for Iraq. Relationship of work with scientific programs, plans, themes. Today the electrical distribution network plays an important role in the world energetic and because of the rising in demand for power electricity, always look for new sources of electrical generation, including renewable energy sources. To connect a new distribution generation source to the grid should be find the best location. The other important subject reduction of electrical power losses and energy losses, a part of the solution to these problems is connecting two feeders together with electronic devices to reduce the loss of electrical power and energy, increase the capacity of distribution network and protection of the network from excessive loads from moment to moment. Purpose and tasks of the research. Increase the electrical energy distribution efficiency by optimizing the electrical distribution networks modes of operation and developing an electrical grid with new electronic device equipment. Objective of research. The purpose of the master's dissertation is to develop methods of analysis and quantitative assessment of the impact of local energy sources on the set of technical characteristics of distribution networks in order to form optimal modes of their operation with a energy losses minimization. Subject of research. Modes of operation of distribution networks with integrated distributed power sources. Practical value of the results. Increasing the reliability and energy efficiency of the electricity grids with optimal placement of new DG sources and using power electronic devices. Electricity savings, energy efficiency and quality of electrical power distribution. reduction of electric power losses, increase of reliability of the power grid. Scientific novelty of the obtained results. The method of determining the conditions of use of distributed generation sources in the process of their integration into electrical networks built on radial schemes, with the objective to provide a minimum of power and energy losses is improved. A quantitative indicator for determining the feasibility of changing the position of normally open points in the distribution networks built on a loop scheme to reduce power losses is developed. The conditions of expediency of power electronic devices application in electric networks with sources of the dispersed generation for the purpose of optimization of active and reactive power flows in real time are defined