When we are simulating the fault on power systems, using MATLAB, how to operate the circuit breakers by providing external signal after the fault is developed?
In matlab there exist Breaker , Three phase breaker .
Three phase breaker :
AS CB is current limiting device whenever fault occurs in the system breaker has to operate .In matlab to operate the breaker , keep initial status of the breaker is closed and based on the fault time duration give the Transition time [start time end time].Based on the duration u have given the breaker will open at that time. Hope this will help you.
If selected, adds a Simulink input to the Breaker block for external control of the switching times of the breaker. The switchingtimes are defined by a logical signal (0 or 1)connected to the Simulink input
Sridhar: Based on fault conditions how to operate the breaker automatically.
Here is a thought for you can do to externally control the breaker. Add a current measurement and store the last measurements to a table. From this table you should check the di/dt current rise rate. If this rate rises critically above a selected level you will send a logical signal to the breaker in order to open. Hope that this will help
Thodoris@ Thanx yaar... I think lookup table method will be more suitable for this, after trying this ill contact you
@Vivekanandan : I think a lookup table would be suitable for your application. Also if you implement something like this at Simulink try to also add a gaussian filter in order to prevent measurement irregularities! If you have any news regarding your work please send me an email. My mail is : theo.kourmpelis [at] gmail [dot] com . I have made some similar fault detection studies but for DC grids. Good luck
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