OeS software

The module is used to perform calculations in network operating conditions. The calculations result in currents in the branches and voltages in the network nodes. Additionally, the program calculates transverse and longitudinal active and reactive losses in network elements and total losses, as well as the power factor and the required reactive power compensation power to the given power factor at the network point. After entering the values of the limit parameters of network elements, it is possible to analyze the degree of load on branch elements and identify exceedances of these parameters.

The module is used to perform calculations in short-circuit conditions under symmetrical and asymmetrical short-circuit conditions, also with ground and neutral. The result of the calculations are the parameters of the short-circuit current in each network node in accordance with PN-EN 60909, as well as the short-circuit current flow and voltage levels in the network nodes during this flow in the event of a short circuit in a given network node. Additionally, short-circuit capacitive currents are also calculated for networks with an insulated neutral point. After entering the values of short-circuit limit parameters of network elements, it is possible to identify exceedances of these parameters.

The module is used to perform calculations in the starting conditions of rotating machines. After specifying the starting times and starting moments of individual machines, it is possible to determine the approximate time course of currents and voltages in the network. The module enables analysis of many machines at the same time during startup. The calculation results also include the steady state before and after the start-up sequence.

The module is used to perform calculations under deformed loads and sources. The input data to the module are the shares of individual higher harmonics, both active and reactive, in the load (non-rotating load or engine) and those generated by the source (static source or rotating generator). The result of the calculations is the flow of higher active and reactive harmonics for all branches of the network and the levels of voltage harmonics in the network nodes. The calculation results also include the values of the fundamental harmonic.

The module is used to analyze the protection systems, in particular to support the selection of protection settings and the analysis of their sensitivity and selectivity. It is possible to implement overcurrent protection characteristics and observe them in a common drawing in order to conduct a comprehensive analysis of operation selectivity. Combined with the results of short-circuit calculations, the module allows you to quickly read the activation time of the protection of the analyzed point and determine the speed of its shutdown.

The module allows you to model any cross-section profile of a cable routed in the ground or air. Various ways of arranging the bundle, culverts and banks of culverts are available to the user. For a defined current path, temperature calculations can be made for a given current load or the allowable long-term, occasional or periodically variable load capacity can be determined. The temperature distribution is presented in heat maps.

The module allows you to model consumers with a time-varying load (for which the load variability is determined based on the operator’s tariffs or data from measurement systems) and to model prosumers with variable generation. In the case of renewable energy sources, the possibility of using the ENTSO-E database (climatic years) has been implemented, taking into account weather forecasts or measurement data in the calculations. It is also possible to define loads using additional statistical models (shaping the distribution and taking into account correlations). Graphic calculation functionalities allow for the analysis of time histories of power and branch currents, voltages in network nodes, losses and other network parameters.