can someone help me with a model of how to use the external control of PQ in 3 phase dynamic load?

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Abishek Kalyanaraman 2017-10-10

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https://ww2.mathworks.cn/matlabcentral/answers/360536-can-someone-help-me-with-a-model-of-how-to-use-the-external-control-of-pq-in-3-phase-dynamic-load

评论： Abhi Sundararaman 2017-10-12

I need to design a controller by using external control of PQ in a 3 phase dynamic load.I am using a 2-area kundur system.What i need to basically do is if the difference between the mechanical rotor angle (theta) is greater than or equal to a particular value,then i need to add 10% of the current load in one area and subtract 10% in another area. can i get any idea of how i can do it

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Abhi Sundararaman 2017-10-12

You could just measure the value of the rotor angle, compare it with a constant block (you could just subtract the two and use the comparetozero block), and then if the output is true, add/subtract 10% where necessary.

The conditional part of this could be done with an enabled subsystem, where the output of the comparison (rotor angle >= particular value) enters the enable port of the enabled subsystem. Make it such that the enabled subsystem outputs 10% of the current load and subtract/add this signal to the corresponding area. Since the enabled subsystem is connected to the rotor condition will only output 10%*currentload if the rotor condition is true.

Above is a simplified version of what you could use. You take the difference in rotor angle and compare it to a value. Then you check your condition (change in rotor angle > value), if this is true then the enabled subsystem will run and take 10% of the current load. The outport1 would feed back to your model and be subtracted/added from/to the current load.

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