Ways to Improve the Efficiency of Computer Simulation of Electrical Systems Modes Based on Equations in Phase Coordinates

Abstract

The development of electrical systems must be accompanied by the development of tools and their modeling. However, the possibility of development models, traditionally developed on the basis of the transition from the real to the single-phase threephase circuits equivalents, represented exhausted. Therefore, along with the use of single-phase three-phase equivalents need to develop models in phase coordinates. Showing the need to move to the development of models based on equations in the phase coordinates and the possibility of increasing the effectiveness of development through the use of implicit methods of integration, the transition to a higher level of decomposition and unification models developed for the implementation of the structural approach to modeling complex systems. References 3. Key words: stationary modes, electric networks, mathematical models, phase coordinates, transients.Показаны необходимость перехода к разработке моделей на основе уравнений в фазных координатах и возможности повышения эффективности таких разработок за счет использования неявных методов интегрирования, перехода на более высокий уровень декомпозиции и унификации разрабатываемых моделей. Библ. 3. Ключевые слова: стационарные режимы работы, электрические сети, математические модели, фазные координаты, переходные процессы.Introduction. The current stage of development of electrical systems characterized by the fact that all the more significant becomes the influence of a number of factors affecting the quality of electrical energy. These factors are linked, firstly, with the advent of new processes and new equipment, and, secondly, with aging and wear of the main equipment of electrical systems. The introduction of new technological processes tend to be associated with an increased harmonic sources, distorting the shape of the voltage curve in electrical networks and equipment wear increases the asymmetry sources as individual network elements are forced to work part number of phases for a long time required for maintenance and repair works on the damaged phase.To solve the problems of analysis of electrical systems in these new conditions and the need to develop new, more complete and accurate mathematical models and corresponding software to allow playback modes systems in the presence of harmonics and unbalance sources. In the traditional approach to modeling, based on the transition from the real three-phase circuit to the single-phase equivalents (in symmetrical components, d-q-0, α-β-0 coordinates, etc.) such models in principle can not be implemented, as the transition itself strictly justified and is possible only when there is symmetry and sinusoidal [1]. For this reason, attempts to develop models based on the transition to single-phase equivalents, in a direction to account unbalance and harmonics, are meaningless.The goal of the paper is the rationale for the transition to the development of models in the phase coordinates and identification of ways to enhance the effectiveness of such developments.