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MATLAB SIMULINK WORKSHOP

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libby
15 diapositives · 977 Views · Jul 26, 2013

MATLAB SIMULINK WORKSHOP. Building Basic Power System Using SimPowerSystems. What is power system?. An electrical network. It comprises of: Generators Load Transmission lines Support devices, e.g. transformers and protection devices. Assessing the network.

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MATLAB SIMULINK WORKSHOP
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  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