Osypenko K. The control of operating modes of autonomous power systems converters

The thesis is devoted to the development of theoretical and practical control principles of electrical power converters in autonomous power systems with distributed generation providing minimization of power losses in the system under the stability conditions. The analysis of modern methods of distributed generation systems construction taking into account the influence of separate energy sources parameters on their joint operation is made. It is shown that the use of electrical power converters with controlled external characteristics parameters allows changing modes of energy sources based on the generated power level, and improves the efficiency of primary power in the system with maintaining the required level of the load voltage. The formation of compensator of wind generator synchronous generator the current in accordance with Gaussian law allows increasing the power level that can be selected from the wind flow by at least 2.2%, that illustrates the efficiency increasing. Using the method of structural numbers for the calculation of energy sources transfer coefficient reduces the calculation complexity by reducing the dimension of structural number . Presentation of diesel generator with separate models at low and high frequencies reduces the order of original model equations to the second and third order, reducing the complexity of the calculations. While comprehensive study of the multiplanimetric system stability with the operating modes of each generator converters determination the use of proposed linear models simplifies the calculations. Basic theoretical calculations were confirmed by the results of computer modeling.