Quick Network Modelling

Start PowaMaster with a clear working area. If you don't have a clean working area, clear the working area by using the New command from the File Menu (Refer to Using Pull Down Menus) or by selecting from the Toolbar using the mouse.

Placing Bus Bars

With the mouse click on in the Bus Bar Button on the Toolbar or use the Bus Bar command from the Network main menu. A Bus Bar data dialog box will appear. Select a voltage of 132kV and click on a point in the working area to place the first Bus Bar. Click on a second point below the first Bus Bar to place the second Bus Bar. Select a Voltage of 11kV and click on a third point below the second Bus Bar to place this third Bus Bar.

Right Click on the Working Area to Reset the Command.

For the GPS entry, Latitude & Longitude can either be specified in degrees or degrees minutes seconds as follows:

•degrees : -30.5535

•d m s : -30 33 12.6

Placing Transformers

With the mouse click on in the Transformer Button on the Toolbar or use the Transformer command from the Network main menu. A Transformer data dialog box will appear. Select a 10MVA 132kV/11kV Transformer and Click on Bus2 and then on Bus3 to connect the Transformer between the 132kV and 11kV Bus Bars.

Placing a Branch

With the mouse click on in the Branch Button on the Toolbar or use the Branch command from the Network main menu. A Branch Section data dialog box will appear. Select a Fox conductor and specify a distance of 10km. Click on Bus1 and then on Bus2 to connect the Branch Section between the two 132kV Bus Bars.

Right Click on the Working Area to Reset the Command.

Placing a Source

With the mouse click on in the Source Button on the Toolbar or use the Source command from the Network main menu. A Source data dialog box will appear. Select the Steady State Tab Sheet. Change the 3Phase Fault Level to 30kA and the Angle to -80°. Change the 1Phase Fault Level to 10kA and the Angle to -80°. Click on Bus1 to place the Source.

Right Click on the Working Area to Reset the Command.

Placing a Load

With the mouse click on in the Load Button on the Toolbar or use the Load command from the Network main menu. A Load data dialog box will appear. Change the Constant Load Type to be the Following:

Constant Power: 60

Constant Current: 10

Constant Impedance: 30

Change the Load to P = 10, Q = 2, Select the Unit to be MVA. Click on Bus3 to place the Load.

Right Click on the Working Area to Reset the Command.

Performing a Load Flow:

Press the Calculate Button on the Toolbar

Calculations will be performed according to the settings specified on Calculate on the Menu bar.

Performing a Fault Calculation:

To determine the fault level at each busbar within the network, press the Fault Button. This calculation provides a 3 phase, Phase to Ground, Phase to Phase and Phase to Phase to Ground fault. In order to determine the fault current in the network as a result of a fault on a particular busbar, right click on the bus and choose fault. Press the Fault Button on the Toolbar or use the Fault Command from the Calculate Main Menu. The fault calculation is performed for all 4 types of faults. In order to determine the result of the fault throughout the network, right click on the the Branch or Busbar and view the results.