Need help on an error regarding a Simulink model

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Tan 2024-5-8

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评论： Tan 2024-5-18

I have a ongoing study on a model regarding insulation coordination which I downloaded from this link https://www.mathworks.com/matlabcentral/fileexchange/108549-insulation-coordination-in-a-generating-station/?s_tid=LandingPageTabfx, it shows an error when I tried to run the model. Not sure what I'm doing wrong, hoping for a solution.

I have attached the original file(project1F30X2_m) and a slightly modified version(model2).

Error Encountered: Specialized Power Systems cannot solve this circuit. Please check for one the following two possibilities : 1) The circuit solution is undetermined. This problem arises when transformers with no magnetization branch (Rm=inf; Lm=inf) are connected together. --> Specify a magnetizing branch with finite Rm and/or Lm parameter values. 2) Circuit solution is inuccurate due to a badly scaled circuit. This is usually caused by a too wide range of resistance values (ex 1e-6 ohm and 1e6 ohm in the same circuit). --> Try to reduce range of resistance values. For example, reduce snubber resistances.

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Answer 1

Neha 2024-5-16

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Hi,

I encountered a similar problem and was able to resolve it by specifying a discrete solver within the "powergui" block. The solver type can be selected in the "Solver" tab of the "powergui" block.

Hope it helps!