Low-Voltage Distribution Network Modeling
In common practice, distribution network modeling stops at the high side of the distribution transformer. However, with the emergence of smart grid planning, engineers seek to study the network as a whole, which requires the modeling of the secondary distribution system. The CYMETM power engineering software allows the detailed modeling and simulation of any low-voltage distribution network. With the CYME software, the analysis of your network will be more complete without adding any complexity.
As most utilities are interested in improving the energy efficiency of their network through means such as Volt/VAR optimization, it has become increasingly important to have a complete network model. The CYME power engineering software offers you the possibility to model the low-voltage distribution system within your current one-line diagram.
The detailed modeling of low-voltage distribution systems has been made possible with the following feature enhancements:
- Single-phase center-tap transformers
- Three-phase center-tap transformers
- Service drop cables: triplex and quadruplex
- Low-voltage spot load connected to the center-tap
- Center-tap connected sources
- Center-tap connected meters
- Single phase center tap connected generators
- Single phase center tap connected motors
- Single phase center tap connected shunt capacitors
- Single phase center tap connected shunt reactors
As with the CYME Enhanced Substation Modeling module, the low-voltage network can be built and shown in a distinct view, giving the possibility to add more information without further complicating the rest of the distribution system view. New report functionalities allow the display of information and results relevant to the low-voltage network.
The CYME low-voltage distribution network modeling and analysis module provides a complete and accurate representation of the network. With the CYME software, medium and low voltage system losses can be calculated accurately and overloaded equipments can be identified to help you plan and improve the system for the future.
The single-phase and three-phase center-tap transformer model has been enhanced such that connecting to either half or full secondary voltage is possible.
With this enhanced center-tap transformer model, spot and distributed load representing each individual customer can be connected to the center-tap as they are in reality.
Service Drop Cables
Triplex and Quadruplex cables, which are service drop cables used in low-voltage distribution network, have been implemented to allow accurate network modeling.
Low-Voltage Network View
The low-voltage distribution network can be modeled in a distinct view or in the same view as the feeders
- Display options will allow the user to distinguish the low-voltage network from the primary network and see where they overlap (i.e. using the same poles).
- You can also obtain a simplified view by selecting the devices to be shown.
- The low-voltage distribution networks can be loaded alone or simultaneously with the rest of the distribution network. Even when only the primary or the secondary distribution network is loaded, the network equivalent of the unloaded network portion is calculated accurately and taken into consideration for simulations. Network losses, equipment loading, and contingency scenarios can all be studied at ease.
Thanks to the CYME features, your original distribution network model is kept clutter-free, while the details you need are just one mouse-click away.
All the relevant CYME analyses (load flow, short-circuit, load allocation etc.) that can be executed on the medium voltage network will run on the low voltage network, with the same accuracy.