OpenModelica-OpenIPSL/C2/Modelling-SMIB-using-OpenIPSL/English

Visual Cue	Narration
Slide Number 1	Welcome to the Spoken Tutorial on Modelling of a SMIB system using OpenIPSL.
Slide Number 2 Learning Objectives	In this tutorial, we will learn:* What is a controlled SMIB system How to model a controlled SMIB system How to connect the components
Slide Number 3 System Requirements	To record this tutorial, I am using* OpenModelica Version 1.12.0 and Linux OS 16.04 The process demonstrated in this tutorial is identical in other OS also such as-* Windows Mac OS Xor FOSSEE OS on ARM.
Slide Number 4 Prerequisites	To follow this tutorial, you should have knowledge of:* Power systems Modelling using OpenModelica For relevant OpenModelica tutorials, please visit our website.
Slide Number 5 Modelling of a SMIB system using OpenIPSL	Earlier in this series, we have already seen how to* Simulate a SMIB system and Interpret its results
Slide Number 6 What is a controlled SMIB system?	* In this tutorial, we’ll learn how to model a SMIB. Here the SMIB system which we are going to model is a controlled one. The generator is controlled with the help of Automatic Voltage Regulator(AVR) and Power System Stabilizer(PSS).
	* Before getting started we will briefly learn about Automatic Voltage Regulator (AVR) and Power System Stabilizer (PSS.)
Slide Number 7 What is a controlled SMIB system?	Automatic Voltage Regulator(AVR) AVR regulates the generator terminal voltage This is done by controlling the amount of current supplied to the generator field winding by the exciter. AVR improves the voltage regulation of the system.
Slide Number 8 What is a controlled SMIB system?	Power System Stabilizer(PSS) (PSS) is installed with AVR to damp the low frequency oscillations in the power system This is done by providing a supplementary signal to the excitation system. PSS' improves the damping of the system.
Slide Number 9 What is a controlled SMIB system?	Optimal tuning of AVR controller and PSS parameters is necessary. This helps to obtain better voltage regulation and oscillation damping in the system.
Slide Number 10 How to model a SMIB system?	Before launching OMEdit let us look at the Single Line Diagram(SLD) of the SMIB system.
Slide Number 11 How to model a SMIB system?	This SLD helps us to get an overview of our system.
Launch OMEdit	Now let us launch OMEdit.
Open OpenModelica and OpenIPSL	Once OMEdit is launched we will create a new Modelica Package. Before creating it, let me include the OpenIPSL library. As demonstrated earlier in the series, navigate to “File” --> “system libraries” --> “OpenIPSL”.
Highlight and click on the icon which is below the file to the top left corner .	To create a new "Modelica Package", click on the icon at the top left corner below the file. We see a pop-up window.
Point at the name column.	Now type the desired name in the Name column. While entering the name make sure there are no spaces and the name doesn't start with a number. It also doesn't accept any special characters.
Create a package with the name “SMIB_Controlled” Highlight the package in libraries column.	Now I will type the name as "SMIB_Controlled". In Specialization column dropdown, select Package and click on Ok. We can see a package in the libraries column. Under this package we will create the models.
	We have to create two models under this package 1. Network. 2. Generator.
Create two models under the main package. Click on "New Modelica class" >> type name="Network" and Specialization="Model".	Now to create the models, right-click on the SMIB_Controlled package. And click on "New Modelica class". Type the name as "Network" and Specialization as "Model".
Highlight the class column SMIB_Controlled Click on "OK".	Here we can see that the Insert in class column is automatically filled as "SMIB_Controlled". This is because we are inserting this model in the SMIB_Controlled package. Click on "OK".
Repeat the above procedure.	Now follow the same procedure to create Generator model. While doing so, type the name of the model as “Generator”.
Point to the Expand button >> click on it	After creating the models you can see the Expand button to the left of the package. Expand the package by clicking on the Expand button.
Open network model.	We can see two models already opened. Click on the network tab at the top. Now let us drag and drop the required components to build the network.
Open the slides Slide number 12	The following are the components required to model the SMIB system.* Generator (Order VI) Buses Two winding transformer Power System Stabilizer (PSS) (Order II)
Slide number 13	Automatic Voltage Regulator (AVR)(Order III)* Power Line Infinite Bus Power Pin Fault Block System Data
Open OMEdit window	Let’s go back to the OMEdit window
Click on the network tab	Click on the network tab at the top if it is not already opened.
Drag and drop all the components	Drag and drop all the components required onto the Network window as shown.
Drag and drop all the described components	For Buses navigate to "OpenIPSL--> Electrical--> Buses--> Bus". Drag and drop the Bus onto the Modeling window of Network.
Type name=Bus 1 >> Ok	Then type the component name as Bus 1 and click on Ok.
	We require three Buses as mentioned earlier in the requirements.
Repeat for Bus 2 and Bus 3	Now do the same for Bus 2 and Bus 3.
Drag and drop all the described components	In a similar manner, drag and drop all the required components.
Drag and drop the required components on to network model window.	For the two winding transformers, navigate to "OpenIPSL--> Electrical--> Branches--> PSAT-->Two winding transformer". For Power Lines navigate to "OpenIPSL--> Electrical--> Branches--> PwLine". For Infinite Bus navigate to "OpenIPSL--> Electrical--> Buses--> InfiniteBus". For Fault Block navigate to "OpenIPSL--> Electrical--> Events--> PwFault". For System Data navigate to "OpenIPSL--> Electrical-->SystemBase".
Go back to Slide Number 11	From the single line diagram shown here, we can get a clear idea about the network.
Go back to OMEdit.	Let us go back to OMEdit. Let us connect the components together according to the single line diagram shown earlier.
Connect the components as described	To connect two components, click on the pwpin of the first component. Drag and click on the second pwpin as shown.
Connect the components in Network model as shown in SLD.	Between Bus1 and Bus2 the Two winding transformer is connected. Bus 2 and Bus 3 are connected via two power lines in parallel.
Connect the components in Network model as shown in SLD.	The infinite bus is connected to Bus3. But before that rotate the Infinite bus component using command "Ctrl+R"
	The Power Fault block is connected to Bus 2.
Connect the components in Network model as shown in SLD.	The system data block is placed on the Network model plane. This provides the system with base and frequency for all the other components.
Switch to Generator model window	The Network is connected now and let us go to the Generator modelling window. The Generator used here is of order six.
Point to PSS and AVR	PSS and AVR are connected to the generator to achieve required control.
Point to AVR	AVR controls the field voltage of the generator taking the generator terminal voltage as input.
Point to PSS	The PSS takes 'w'(Rotor speed) as the input and feeds AVR.
Drag and drop components on to Generator modelling window	Now let us drag and drop PSS, AVR and Generator on to the Generator modelling window.
Connect the components as described	For Automatic Voltage Regulator (AVR)(Order III) navigate to "OpenIPSL--> Electrical--> Controls--> PSAT-->AVR-->AVRTypeIII".
Connect the components as described	For Power System Stabilizer (PSS) (Order II) navigate to "OpenIPSL--> Electrical--> Controls--> PSAT-->PSS-->PSSTypeII".
Connect the components as described	For Generator (Order VI) navigate to "OpenIPSL--> Electrical--> Machines--> PSAT-->Order6".
Connect the components as described	For Power Pin navigate to "OpenIPSL--> Interfaces--> PwPin". This Power Pin acts as an interface between the Generator and Network models.
Adjust and resize the components	Adjust and resize the components as shown to make it look better.
Connect the components as described	Let us connect the components. The AVR takes the generator terminal voltage as input i.e. Generator "V" is connected to AVRTypeIII "v" The Initial Field voltage (Vf0) of the generator is given to AVRTypeIII as input.
	The output "Vf" of AVRTypeIII is connected to input "Vf" of the generator.
Point to PSS input signal	The PSS input signal is connected to 'w'(Rotor speed) of the generator.
Point to the output of PSS	The output of PSS is fed to "Vs" of the AVRTypeIII.
Point to the connection	The Mechanical power is not controlled here so Pm and Pm0 of the generator are connected together.
Point to PwPin	The Power pin of the generator is connected to PwPin.
Point to PwPin	This PwPin acts as an interface between the two, Generator and Network classes.
Shift to Icon view of the Generator model	Now shift to the icon view using the "Icon View". This is at the top left corner of the Generator Modelling window.
	Here I will use a circle to represent my generator and its controls.
Select the ellipse	Select the ellipse at the top toolbar to draw a circle as shown.
Drag the cursor to draw a circle	After selecting eclipse, click on the top left corner and drag the cursor to draw a circle.
Shift to network window and drag and drop Generator model onto it	Now let us go back to our network modelling window. Here drag and drop the Generator model in your package.
	Navigate to "SMIB_Controlled-->Generator" and connect it to Bus1. This makes the connections complete.
	We can use command "Ctrl+S" and then a pop-up opens up. Select the desired location and save it.
Slide Number 14 Summary	This brings us to the end of this tutorial. Let us now summarize. In this tutorial, we have learnt: What is a controlled SMIB system How to model a controlled SMIB system How to Connect the components
Slide Number 15 Assignment	As an assignment:* We recommend that you take an example network from any textbook or publications. Using the OpenIPSL library components, connect and model the network.
Slide Number 16 Power System Simulation Project	The FOSSEE team invites contributions to develop power system networks using OpenIPSL library. For more details, please visit this site. https://om.fossee.in/powersystems
Slide Number 17 About the Spoken Tutorial Project	The video at the following link summarises the Spoken Tutorial project. Please download and watch it.
Slide Number 18 Spoken Tutorial Workshops	We conduct workshops using Spoken Tutorials and give certificates. Please contact us.
Slide Number 19 Forum slide	Please post your timed queries in this forum
Slide Number 20 Forum for specific questions:	Please post your general queries in this forum
Slide Number 21 Textbook Companion Project	The FOSSEE team coordinates the TBC project. For more details, please visit these sites.
Slide Number 22 Lab Migration Project	The FOSSEE team helps migrate commercial simulator labs to OpenModelica. For more details, please visit this site.
Slide Number 23 Acknowledgements	Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.
Acknowledgements	We acknowledge the contributions made by Prof. Luigi Vanfretti and Mr. Biswarup Mukherjee for the models used in this series.
Slide Number 24 Thanks	This tutorial is created by Samboju Sai Kiran. Thank you for joining.

Contributors and Content Editors

Kaushik Datta, Nancyvarkey, Vineeta