Machine initialization in the powergui is not working with a three-phase circuit breaker in the model with a synchronous generator and the infinite bus
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Good day.
I am trying to design a model where a synchronous generator is connected to the infinite bus. In this case I want to check my synchronization subsystem, so I want to simulate the operation of the generator when it starts from the rest, and when all synchronization requirements are fulfilled, close the main circuit breaker and connect the generator to the power grid (infinite bus). However, right now I want to be sure that the connection of the synchronous machine to the grid is working properly and I experienced a problem with the machine initialization mode.
I am using this mode in order to specify active power (SG in a P&V generator mode), hence the initial conditions, and so on. It perfectly works when the generator is connected to the infinite bus (programmable three-phase voltage source, swing mode), and there is no circuit breaker in the system. As soon as I put the breaker between the generator and the grid, and trying to initialize the same process, I get the notification "Unable to find machine initial conditions for the parameters you specified in the Machine Initialization tool", and that I have to use the Load Flow instead, which doesn't help in order to change the initial conditions. On top of that in the machine initialization window I see that terminal voltage is around 10^5 pu, so as you can imagine it interferes the whole system in terms of the torque, speed, currents and etc.
Are there any options to properly specify the initial conditions of the system, or maybe there are other options how to simulate the transient process of connection of the generator to the infinite bus. Thank you in advance.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/162684/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/162685/image.png)
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