Kharchenko P. Modelling of multi-machine power systems transients in the pace of real time

The object of research - transients in multi-machine power systems. Objective - developing the principles and methods for modeling of multi-machine power systems in the pace of real time, and their implementation in multi-purpose simulator program. Research methods and equipment - the basic provisions of the theoretical electrical engineering, electrical machines theory, mathematical analysis, linear and nonlinear programming, graph theory and sets, computer science, computer with general-purpose and real-time operating systems. Theoretical and practical results - an actual scientifically-applied problem of transient regimes real-time analysis in modern power networks and systems was solved through the application of improved methods and mathematical models and their computer implementation. Novelty: we have developed a new method of dynamic transformation of electrical system's sites in the equivalent exponentially-harmonical current sources to significally reduce the dimension of the differential equation system; we have improved the mathematical model of multi-machine power systems based on the full differential equations through the use of combined electrical machine model; we have improved the method for simulating transients in power systems, increasing the speed of calculation by using different discretization steps for the individual subsystems. The degree of implementation - results in the form of a program to simulate emergency operations introduced in the "Donbass power system" company (Gorlovka, Ukraine), as well as in the educational process of SHEI "DonNTU". Scope - electricity, electrical engineering.