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CERBERUS Overview

CERBERUS is a network calculation software which, despite its comprehensive feature list, offers intuitive handling and clear display of results. Its simple installation and ease of use allow the user to very quickly concentrate on his engineering task.

Diverse Calculations

Calculations in CERBERUS are performed by an equation system solver. Therefore no limits in terms of topologies exist. Branch lines as well as intermeshed networks of virtually any size may be analysed with CERBERUS.

The most important calculations provided by CERBERUS are load flow and short circuit analyses. During load flow calculations, node voltages, current and power flows are calculated based on the loads and power generation of power sources. For short-circuit analyses, the initial short circuit currents are calculated for all network nodes. Based on these two analysis types, CERBERUS offers some more functions:

Evaluation of the connection of alternative power generators
Based on the VDEW guide line “Eigenerzeugungsanlagen am Niederspannungsnetz” (or “Eigenerzeugungsanlagen am Mittelspannungsnetz” respectively), the voltages and their changes caused by the integration of the alternative power generators are analysed and the permissibility of their connection is checked.

Switching voltages / start-up of induction machines
These functions determine the voltage changes caused by the switching of loads. The admissibility of the voltage drops is evaluated.

Flicker calculation
Flicker values are calculated for simple load profiles and compared with the accepted limits.

Connection point analysis
The short-circuit power, permitted power injection and phase angle of the net impedance are calculated for all network nodes.

Impedance measurement
The effective impedance between two network nodes is determined.

The “Expanded Analyses” allow for the combination of load flow calculations with Parameter Variation, Load Cycle and Worst Case Analysis.

User-friendly Graphical User Interface

The clear structure of the graphical user interface guarantees effective working with CERBERUS. Network components are placed into the schematic via drag-and-drop. All components come with specific input dialogs that feature integrated range and plausibility check. Some models, as for example those for cables and transformers, are linked with databases containing parameter sets which may be expanded easily by the user.

The results of the calculation may be displayed in the schematic and printed with it. Animations help for a better overview:

Coloured display in case of over- or undershooting of (configurable) voltage limits

Visualisation of component capacity utilization

Analysis-specific result display (voltage drops, flicker values etc.)

Colouring of net islands

Display of switch states

In order to guarantee a good overview even for big networks, CERBERUS features the technologies “Multiple Pages” and “Sub-Systems”. “Multiple Pages” allow for the splitting of the networks into an arbitrary number of pages with connections between the pages via so-called “ports”. Sub-systems make it possible to introduce a secondary hierarchy level and therefore an encapsulation of parts of the overall system. At the top level schematic, sub-systems appear as symbols with electrical terminals. Search functions, in combination with error messages, add to the ease of working in CERBERUS.

Additional Functions

In addition to the visualisation of the results in the schematic, a protocol using rtf-format may be generated. The protocol contains the net list with all components and their parameters, CERBERUS settings and detailed, analysis-specific results. Result listing includes voltages of all network nodes and their deviation from the nominal values, capacity utilization of the components, tripping times of fuses, power flow and much more. Results exceeding preset limits will be represented in the protocol by red colours.

Values that influence several components of the network may be defined as variables. Component parameters may be set by using expressions including variables. For documentation purposes it is possible to display the parameter values in the schematic and in printouts created.

Technical Requirements

CERBERUS runs under Windows® XP, Windows® 7 , Windows® 8 and Windows® 10.
CERBERUS may be installed at a local machine or in a network.