UNIFIED MODELS OF ELEMENTS OF POWER SUPPLY SYSTEMS BASED ON EQUATIONS IN PHASE COORDINATES
Journal Title: Електротехніка і Електромеханіка - Year 2015, Vol 0, Issue 6
Abstract
Purpose. The models of electrical machines in the phase coordinates, the universal algorithm for the simulation of separate elements in a d-q coordinates system and in a phase-coordinates system are proposed. Methodology. Computer methods of investigation of transients in electrical systems are based on a compilation of systems of differential equations and their numerical integration solution methods. To solve differential equations an implicit method of numerical integration was chosen. Because it provides to complete structural simulation possibility: firstly developing models of separate elements and then forming a model of the complex system. For the mathematical simulation of electromagnetic transients in the elements of the electrical systems has been accepted the implicit Euler-Cauchy method, because it provides a higher precision and stability of the computing processes. Results. In developing the model elements identified two groups of elements: - Static elements and electrical machines in the d-q coordinates; - Rotating electrical machines in phase coordinates. As an example, the paper provides a model of synchronous and asynchronous electric machines in the d-q coordinates system and the phase coordinate system. The generalization algorithm and the unified notation form of equations of elements of an electrical system are obtained. It provides the possibility of using structural methods to develop a mathematical model of power systems under transient conditions. Practical value. In addition, the using of a computer model allows to implement multivariant calculations for research and study of factors affecting the quantitative characteristics of the transients.
Authors and Affiliations
Yu. N. Vepryk, O. A. Nebera
Keywords
Related Articles
- EP ID EP299160
- DOI 10.20998/2074-272X.2015.6.10
- Views 97
- Downloads 0
MAGNETIC FIELD IN A GAP OF ELECTROMECHANICAL DISINTEGRATORS
The magnetic field created in an air gap of electromechanical disintegrators as a result of actions of two opposite running magnetic fields is considered. It is shown that motionless pulsing fields are as a result formed...
DEVELOPMENT OF METHODS OF CALCULATION OF TRACTION POWER SUPPLY SYSTEMS AND ENERGY SYSTEMS FEEDING THEM
Currently, the cause deterioration of quality rating of electricity on tire traction substations AC can be either how mode of operation of power systems, industrial loads so and the impact of electric traction. The exper...
METHOD FOR VOLTAGE CONTROL IN CHARGE CIRCUIT OF ELECTRIC DISCHARGE INSTALLATIONS WITH TWO CAPACITORS UNDER NONZERO INITIAL CONDITIONS
Purpose. To analyze the transient processes in the charge circuit of electric discharge installations with two capacitors, taking into account the change in the initial conditions of such processes (initial voltage on th...
DETERMINATION OF ECONOMICALLY JUSTIFIED PARAMETERS OF SYNCHRONOUS DISCONNECTION AT LOW-VOLTAGE CIRCUIT SWITCHING VIA A SYNCHRONOUS VACUUM CONTACTOR
Dependence of a single switching procedure cost upon the contact opening delay time and delay-time spread is derived for a low-voltage synchronous vacuum contactor. For different cost levels, boundaries of permissible va...
FINITE ELEMENT TECHNIQUE FOR SOLUTION OF THERMO-CONTACT PROBLEMS AND ITS APPLICATION IN NUMERICAL ANALYSIS OF DEVICES WORKING WITH INDUCTION HEATING
Purpose. To develop an effective approach for the numerical solution of transient thermo-contact problems and present a typical example of its utilization regarding devices working on the principle of thermoelasticity pr...