This module is designed to study the impact of single forced (e.g. fault on a line) or planned outages on the electrical distribution system. It finds the optimal switching plan to restore electrical power to customers. It may be used as an off-line application to pre-define strategies in case of outages or as an on-line application to help the network operator find quickly the correct strategy after a fault has occurred.
The following objective functions are implemented:
- Minimize network losses
- Minimize the number of overloaded elements
- Minimize the average loadings of the elements
- Maximize the average voltage
Restoration Stages
- Four stages in the restoration strategy will be evaluated and may be stored in a fault history database:
- Occurrence of the fault
- Isolation of the fault. NEPLAN shows the unsupplied customers
- Re-supply of customers which are affected by the fault. NEPLAN shows which customer are re-supplied again
- Normalization of the network after the repair of the fault
- All stages of the selected optimal restoration plan with the new switch positions will be graphically displayed on the single line diagram
DMS On-Line Application
- Results with the new switch positions of all re-supply stages, including all objective functions are displayed as spreadsheet tables or can be accessed as text file for further evaluation (e.g. in DMS applications)
- All dialogues and restoration algorithms are available through a C/C++ API, the NPL – NEPLAN Programming Library. With NPL NEPLAN data and functions can be accessed with a user written C/C++ program. This allows building up customized restoration strategies for network operators