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This paper describes procedures for modelling of two-winding off-load tap-changing transformers in two alternative simulation tools for load flow analysis — DYNAST and SimEPS. For both softwares, respective transformer models and other necessary simulation steps are introduced. Determination of all input parameters is presented along with the verification of results for single-phase transformer model...
This paper describes the load flow analysis and its solution in alternative tools using physical and block diagrams. Usually, each load flow problem is defined for one phase only and solved by the respective system of equations. Using the physical diagrams, load flow problems can be analyzed for all three phases by considering phase-to-phase and phase-to-earth couplings, which are normally included...
This article concerns on overview of today software products for ordinary personal computers and small workstations, gives list of important features relevant to solution of environmental foresighting. For this branch of problems are important not only usual advantages of software packages like computing power, simplicity of use, number of prepared models, but in the first place multidisciplinarity...
Approach to design of outer electric lines has changed in last years very significantly. Especially new demands in branch reliability should designer keep in mind. These new requests are basis of new European and national standards. To simplify design layout, automate verification of all rules and limitations and minimize mistakes computer application was developed to solve these tasks. This article...
This article deals with the calculation of capacitances for double-circuit power lines by the approximation function (AF) method and the reliability of this approach when used in transient state simulations in electric power systems. Standard procedure for computing the capacitances to earth and phase-to-phase capacitances is described along with its implementation into mathematical models of power...
This paper deals with an analysis of the inductive effects of overhead lines on nearby pipelines. Operational situations of overhead lines and an active cathodic protection of metal pipelines are considered.
The paper deals with voltage and frequency stability analysis of a LV distribution network in island mode. The LV network in the island mode is supplied by a local source in continuous operation (e.g. biogas power plant) and the photovoltaic power plant. Voltage and frequency variations caused by common household equipment switching are evaluated in compliance with the standard EN 50160.
This paper deals with the calculation of dangerous inductive effects of overhead very high voltage lines on close steel pipelines, with a focus on refining the input data precision.
This paper deals with practicable modelling of single-circuit power lines with covered conductors. Moreover, it focuses on the modelling of medium voltage overhead lines with covered conductors for double-circuit distribution. Despite of not being currently the one of prominent simulation tools in the field of electric power engineering, software package DYNAST was chosen for all the modelling procedures...
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