How to specifiy the parameters of "Distributed Parameter line" block?

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Sam 2019-7-2

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回答： Abdellatif M. Aboutaleb 2022-3-28

Power_system_Inverter_new_with_Continuous_States_Problem.slx

I want to use the "Distributed Parameter line" block to simulatiing voltage at the electric motor terminal. According to the documentation of this block, there are two ways to specify the parameters of rlc. The first one with [N*N] matrix, the second with sequence parameters. The paramters i've got from the manufacturer of the reference powercable are only R L C Z Value per kilometer at a certain frequency.

I want ot konw how to calculate [N*N] matrix and positive | zero sequence of the R L C. Or they can only be measured and offered by the manufacturer.

I've uploaded a small model in the attachment. I also wonder the difference simulation results between one phase and 3 phase distributed Parameter Line. Why every time the voltage of one phase changes and vibrates lead to the changes of vibration of the other two phases? Because of the mutual inductance and the capacitance between phases ?

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Answer 1

Arvind Sathyanarayanan 2019-7-2

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Sam,

If you know the RLC parameters of your cable, you can use the pi section line or you could just lump the parameters and use RLC elements instead of using a cable/line model.

From the documentation of distributed parameter line, it is based on Bergeron's traveling wave method and the listed for reference for it is: Dommel, H., “Digital Computer Solution of Electromagnetic Transients in Single and Multiple Networks,” IEEE® Transactions on Power Apparatus and Systems, Vol. PAS-88, No. 4, April, 1969

I would suggest reading it if you want to know about the model.

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Sam 2019-7-3

Hi Arvind,

Thanks for your answer. I will look into it.

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Answer 2

S Jarjees Ul Hassan 2019-11-11

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Hi Sam,

I am facing the same problem. If you have got any idea kindly help me too.

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Sam 2019-11-12

Hi bro,

i've look into the reference, but there is nothing to do with the positive | zero sequence. I just replaced the three phase block with 3 single phase distributed parameter line.

S Jarjees Ul Hassan 2019-11-14