1. MATLAB SIMULINK WORKSHOP
Building Basic Power System Using SimPowerSystems

2. What is power system? An electrical network. It comprises of:
Generators
Load
Transmission lines
Support devices, e.g. transformers and protection devices.

3. Assessing the network
It is imperative to continuously assess the power network for any inconsistencies.
Type of possible assessment done:
Load dispatch generator scheduling
Contingency analysis
Stability Studies
Stability studies for network expansion and improvements.

4. Methods of assessment
The standard approach done by utilities all over the world is by using a form of static load flow or power flow iteration.
Reason:
Simple
Fast
Accurate for the constraint given to the system

5. Methods of assessment
Disadvantages:
Inaccurate for dynamic scenarios

6. Static Load Flow Objective:
To compute the P and Q flow in the branches of a system (these values may be an indicator of line loading due to load or generator constraints)
To compute the resultant bus voltage levels
To compute generation levels due to load or generator constraints.

7. Overview of Static Load Flow
Using a mathematical model for the system, compute the P and Q flow in each branch.
Well established methods:
Newton Raphson Iteration
Gauss-Sidel Iteration
Fast DeCoupled Newton Raphson Iteration

8. Using SimPowerSystems
The new name for the power system block set available in Matlab Simulink
The power system block set contains basic components which can also be customizable to suite application requirements.

9. Calling Power System blockset
Type powerlib at the MATLab prompt
At the powerlib window, select file-new-model, to setup a new circuit.
Using the powerlib library window, a simple circuit construction can be made.

10. Example circuit

11. Completed Circuit

12. Running basic calculations
Click on the run button
Clicking onto the scope may show the waveforms going in and coming out of the transmission line.
For practical example, please load file name psbmachines.mdl located in the matlab folder.

13. Advantages of SimPowerSystems
Advantageous for fast system prototyping, hence suitable for quick exploratory research related to power system components

14. Disadvantage of SimPowerSystems
As the system size increases, building the power system may be complicated hence may require computing overhead to compute basic power system iterations.
Hence a ‘program’ based 3rd party package is recommended, e.g. MatPower

15. Thank You