Calculations > Frequency disconnection

The calculation performs load flows at different frequencies, applying the frequency protections present to shut down portions of the network.

Calculation

Start the calculation with Calculate | Special | Frequency disconnection.

The calculation performs load flows at the following frequencies:

•1.04 pu

•1.036 pu

•1.032 pu

•1.028 pu

•1.024 pu

•1.02 pu

•1 pu

•0.996 pu

•0.98 pu

•0.976 pu

•0.972 pu

•0.968 pu

•0.964 pu

•0.96 pu

With a system frequency of 50 Hz specified in the options, this means 52, 51.8, 51.6, 51.4, 51.2, 51, 50, 49.8, 49, 48.8, 48.6, 48.4, 48.2 and 48 Hz.

Results

The options for viewing the results are:

•in the one-line diagram

•in Calculate | Results | Overview

•in Calculate | Results | Details

•in Calculate | Results | Graph

The results are similar to the load flow results.

Color indication

Circuit breakers tripping at any time are shown in the attention color.

Otherwise, the colors are according to the load flow colors.