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Airshou download apk android. This tutorial describes how to configure a PSCAD simulation to communicate with the simulation server.It assumes that the simulation already has the pscad_send and pscad_recv components, and thatthese components have already been configured to send and receive data signals.

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1. Download the simulation from github.
2. Extract the .psc file and the psocket.c file to a new directory dedicated to the simulation. The .psc file contains the PSCAD simulation, which relies on the psocket.c file to run.
3. Move the provided .xml file to the PSCAD-Interface/config/ folder of the machine running the simulation server. This file has been configured to work with the provided simulation.

FREEDM/PSCAD-Interface/pscad/include contains two header files that are not included in the default GFortran installation. These header files must be moved to the compiler's include folder for the simulation to compile. This include folder can be found at ProgramFiles/GFortran/version/include/. Move the content of the pscad include folder into the GFortran include folder.

1. Open the .psc file. This will require a machine that runs PSCAD and a PSCAD Educational license.
2. Locate the send component shown below.
   
3. Double-click on the box labeled pscad_send to access its properties.
   
4. In the example, the component has been configured to connect to a simulation server located at 131.151.89.229:8000. The IP address and port number fields should be modified to connect to the machine that will run the simulation server. Note that the default values should not be used to prevent contention with other simulations run by the FREEDM-DGI team.
5. Locate the recv component below and configure the pscad_recv box in the same manner.
   

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1. Open the .xml file downloaded earlier in the PSCAD-Interface/config directory.
2. Locate the line <adapter type = 'simulation' port = 'X'>.
3. Change the value of port to the port number used to configure both the send and recv components.
4. Locate the line(s) <adapter type = 'pscad' port = 'Y'>.
5. Change the value(s) of port to the port number(s) specified by the FREEDM-DGI in its adapter specification file.
6. Open the PSCAD-Interface/config/simserv.cfg file.
7. Add the line xml=config/filename.xml where filename.xml is the name of the .xml file included in the simulation download.
8. Remove or comment other lines that define the xml= key.

Example .xml file:

1. Start the simulation server with the command ./driver.
2. Run the PSCAD simulation with the green arrow on the top toolbar.
3. Select Yes if the simulation warns that it will use a large amount of memory.

A turning gear icon will appear in the lower-right corner to indicate the simulation is running. After some time, the current simulation time will appear in this corner below the gear icon. If the simulation time never appears, and the message log does not indicate a compilation error, then the simulation has been misconfigured and cannot connect to the simulation server. If the time advances, the connection has been formed.

Common Errors

User Source File does not exist

psocket.c is not in the same directory as simulation.psc - verify the files have been kept together, or obtain a new version of psocket.c from the repository.

psocket.c:7:19: error: netdb.h: No such file or directory

netdb.h has not been moved from the pscad/include folder to the GFortran/version/include folder - move the file

psocket.c:8:24: error: sys/socket.h: No such file or directory

socket.h has not been moved from the pscad/include/sys folder to the GFortran/version/include/src folder - move the file

The simulation stalls or stops responding

The TCP Sockets are set to block until a connection is made to the Interface. If the simulation stalls, either the Interface code is not running or the pscad_send and pscad_recv components have not been configured to use the correct Interface IPv4 address. Run the Interface, or correct the IP Address and Port Number fields.

Broken Pipe

This error message occurs when the Broker is unable to connect to the Interface server. The Interface is either not running or freedm.cfg does not include the correct hostname / port number for the Interface server.

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Exception in main():Port in use

This error occurs when the Broker attempts to use a port number that its machine has already reserved. Modify the freedm.cfg entry for the machine that causes the error to use a different port number.

Exception in main():Permission denied

This error occurs when the Broker uses a system-restricted port (0-1023). Modify the freedm.cfg entry for the machine that causes the error to use a larger port number outside of the restricted range.

Common Solutions

Check that Windows Firewall has not blocked PSCAD. PSCAD is not designed to work with TCP Sockets, and therefore it is blocked the first time it attempts to run a simulation. Adding the simulation.psc file to the firewall white list is necessary if the firewall prompt does not appear the first time you run the simulation.

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Check that Windows Firewall has not re-blocked PSCAD. Because PSCAD is not designed to work with TCP Sockets, each PSCAD simulation is considered a separate program. If you move or rename the simulation, the firewall exception will no longer be valid, and the firewall will re-block PSCAD as a different program.

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Verify that the problem is not with another component of the simulation environment. Two files are generated in the temporary folder created by PSCAD during simulation: pscad_send.txt and pscad_recv.txt. If these files show a series of GET and SET messages followed by some amount of data, and the timestamp at the top of the file corresponds to the current time, the simulation is working and another component has failed. Otherwise, these files may include debug information useful to determine why the PSCAD Simulation will not work.