Low-voltage secondary distribution modeling

Low-voltage secondary distribution modeling

Features

• Single-phase and three-phase center-tap transformers
• Service drop cables: triplex and quadruplex
• Low-voltage spot load connected to the center-tap
  
• Center-tap connected sources and meters
  
• Single phase center tap connected generators, motors, shunt capacitors and reactors
  
• The secondary distribution system can be built and shown in a distinct view, providing the possibility to add more information without further complicating the rest of the distribution system view. Report functionalities allow the display of the relevant information and results.
  
• The module provides a complete and accurate representation of the distribution system. With Eaton's CYME software, medium- and low-voltage system losses can be calculated accurately and overloaded equipment can be identified to help you plan and improve the system for the future.
  

Center-Tap Transformer

The single-phase and three-phase center-tap transformer model supports connecting to either half or full secondary voltage.

With this center-tap transformer model, spot loads representing each individual customer can be connected to the center-tap as they are in reality.

Service drop cable

Low-voltage network view

The low-voltage distribution system can be modeled in a distinct view or in the same view as the feeders.

Display options will allow the user to distinguish the secondary distribution system from the primary and see where they overlap (i.e. using the same poles).

The secondary distribution system can be loaded alone or simultaneously with the primary distribution system. Even when only the primary or the secondary distribution system is loaded, the network equivalent of the unloaded portion is calculated accurately and taken into consideration for simulations. System losses, equipment loading and contingency scenarios can all be studied with ease.

All the relevant CYME analyses (load flow, short-circuit, load allocation, etc.) that can be executed on the medium-voltage distribution system will run on the low-voltage distribution system, with the same accuracy.

Sub-networks modeling

More accurate simulation results lead to  more precise planning and management of distribution system expansion and maintenance, and a greater facility to manage the integration of Distributed Generation (DG) and Distributed Energy Resources (DER) in the power grid, saving time and money.

The sub-networks modeling module is included with any of the other CYME circuit/system modeling modules, and shares similar features. It supports the creation of any sub-network, including utility vaults, switching cabinets and modular substations and DG and DER components in a nested representation connected to the overall grid.

The user can create a sub-network in a schematic or georeferenced view style as needed. Each can be shown as clickable nested view icons on the overall main representation of the system, revealing the editable view of the sub-network.