The Tekla Xpower Power System Analysis (PSA) application is used to perform various network calculations for both current and future network setups, such as load flow, short-circuit and earth fault calculations for radial and meshed networks on several voltage levels.
During network planning, the network designer can use PSA to:
- Check the technical dimensioning of new planned networks to ensure that the network objects meet the power distribution requirements. These checks can be performed for both larger new networks and for smaller existing areas, for example, to determine how adding a new customer influences the existing network.
- Run load flow calculations that are based on the customer load profiles and annual consumptions transferred from the Customer Information System (CIS) or the actual hourly-measured usage values obtained from the Automatic Meter Reading (AMR) system. The load flow calculations determine the load grade of each line in the network and help to determine whether the cables and other network components are correctly dimensioned.
- Perform short-circuit calculations to check the dimensioning of the protection devices, such as relays and fuses. The short-circuit calculations determine the maximum and minimum short-circuit currents that can occur in any part of the network.
In addition to network planning, PSA can be used in follow-up calculations to check whether the existing network requires preventive actions, such as strengthening of lines or feeders. The follow-up calculations are mass calculations that can be performed simultaneously for all networks.