vector group Yd5

asked 2017-07-04 15:49:02 -0600

Patricio1285
1 ●1 ●1 ●1

Greetings,

I'm modeling a simple power system: generator, transformer and load. The problem comes up after I enter the transformer's (Yd5) vector group. When doing this, at the time I run the load flow, there is the following response: "Blown up after 1 iteration". On the other hand, when I omit the vector group, the load flow's result is as expected. Has anyone had the same inconvenience?

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answered 2017-07-05 01:08:38 -0600

perolofl

3332 ●1 ●8 ●19

updated 2017-07-05 06:14:27 -0600

Vector group Yd5 means 150 degrees phase shift between the two windings. This angle difference it too large as starting point for Newton-Raphson. Solve first with Gauss-Seidel and then continue with Newton!